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Change cost for REF to take into account cost for 1 extra key read_next
The main difference in code path between EQ_REF and REF is that for REF we have to do an extra read_next on the index to check that there is no more matching rows. Before this patch we added a preference of EQ_REF by ensuring that REF would always estimate to find at least 2 rows. This patch adds the cost of the extra key read_next to REF access and removes the code that limited REF to at least 2 rows. For some queries this can have a big effect as the total estimated rows will be halved for each REF table with 1 rows. multi_range cost calculations are also changed to take into account the difference between EQ_REF and REF. The effect of the patch to the test suite: - About 80 test case changed - Almost all changes where for EXPLAIN where estimated rows for REF where changed from 2 to 1. - A few test cases using explain extended had a change of 'filtered'. This is because of the estimated rows are now closer to the calculated selectivity. - A very few test had a change of table order. This is because the change of estimated rows from 2 to 1 or the small cost change for REF (main.subselect_sj_jcl6, main.group_by, main.dervied_cond_pushdown, main.distinct, main.join_nested, main.order_by, main.join_cache) - No key statistics and the estimated rows are now smaller which cased estimated filtering to be lower. (main.subselect_sj_mat) - The number of total rows are halved. (main.derived_cond_pushdown) - Plans with 1 row changed to use RANGE instead of REF. (main.group_min_max) - ALL changed to REF (main.key_diff) - Key changed from ref + index_only to PRIMARY key for InnoDB, as OPTIMIZER_ROW_LOOKUP_COST + OPTIMIZER_ROW_NEXT_FIND_COST is smaller than OPTIMIZER_KEY_LOOKUP_COST + OPTIMIZER_KEY_NEXT_FIND_COST. (main.join_outer_innodb) - Cost changes printouts (main.opt_trace*) - Result order change (innodb_gis.rtree)
This commit is contained in:
Monty
@ -312,7 +312,7 @@ ANALYZE
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"ref": ["test.t1.a"],
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"loops": 10,
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"r_loops": 10,
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"rows": 2,
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"rows": 1,
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"r_rows": 0.2,
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"cost": "REPLACED",
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"r_table_time_ms": "REPLACED",
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@ -314,7 +314,7 @@ insert into t2 values (0),(1);
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analyze select * from t1 straight_join t2 force index(a) where t2.a=t1.a;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using where
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1 SIMPLE t2 ref a a 5 test.t1.a 2 0.20 100.00 100.00 Using index
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1 SIMPLE t2 ref a a 5 test.t1.a 1 0.20 100.00 100.00 Using index
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drop table t1,t2;
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#
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# MDEV-8063: Unconditional ANALYZE DELETE does not delete rows
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@ -22,15 +22,15 @@ Last_query_cost 0.000000
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explain select count(*) from t1 where a > 0;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 12 Using where; Using index
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Last_query_cost 0.002795
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Last_query_cost 0.002877
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explain select count(*) from t1 where a > 1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 12 Using where; Using index
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Last_query_cost 0.002795
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Last_query_cost 0.002877
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explain select count(*) from t1 where a > 2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range PRIMARY PRIMARY 4 NULL 11 Using where; Using index
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Last_query_cost 0.002665
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Last_query_cost 0.002747
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#
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# Shorter indexes are prefered over longer indexs
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#
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@ -41,20 +41,20 @@ Last_query_cost 0.007441
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explain select count(*) from t1 where b between 5 and 10;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range ba,bda ba 5 NULL 6 Using where; Using index
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Last_query_cost 0.002015
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Last_query_cost 0.002097
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explain select sum(b+c) from t1 where b between 5 and 6 and c between 5 and 6;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range ba,bda,cba,cb cba 10 NULL 2 Using where; Using index
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Last_query_cost 0.001494
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Last_query_cost 0.001577
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# Cost of 'd' should be slightly smaller as key 'ba' is longer than 'd'
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explain select count(*) from t1 where b > 6;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range ba,bda ba 5 NULL 5 Using where; Using index
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Last_query_cost 0.001885
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Last_query_cost 0.001967
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explain select count(*) from t1 where d > 6;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range d d 5 NULL 5 Using where; Using index
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Last_query_cost 0.001885
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Last_query_cost 0.001967
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#
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# Check covering index usage
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#
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@ -68,15 +68,15 @@ Last_query_cost 0.007441
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explain select count(*) from t1 where b=2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref ba,bda ba 5 const 2 Using index
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Last_query_cost 0.001059
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Last_query_cost 0.001141
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explain select count(*) from t1 where b=2 and c=2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref ba,bda,cba,cb cba 10 const,const 2 Using index
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Last_query_cost 0.001059
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Last_query_cost 0.001141
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explain select count(*) from t1 where b=3 and c between 3 and 4;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range ba,bda,cba,cb cba 10 NULL 2 Using where; Using index
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Last_query_cost 0.001494
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Last_query_cost 0.001577
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#
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# Prefer eq keys over ref keys
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#
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@ -87,5 +87,5 @@ Last_query_cost 0.003126
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explain select a,b,e from t1 where d=10 or d=11;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range d d 5 NULL 2 Using index condition
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Last_query_cost 0.003126
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Last_query_cost 0.003291
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drop table t1;
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@ -85,14 +85,14 @@ with t as (select a, count(*) from t1 where b >= 'c' group by a)
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select * from t2,t where t2.c=t.a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 4 Using where
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1 PRIMARY <derived2> ref key0 key0 5 test.t2.c 2
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1 PRIMARY <derived2> ref key0 key0 5 test.t2.c 1
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2 DERIVED t1 ALL NULL NULL NULL NULL 8 Using where; Using temporary; Using filesort
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explain
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select * from t2, (select a, count(*) from t1 where b >= 'c' group by a) as t
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where t2.c=t.a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 4 Using where
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1 PRIMARY <derived2> ref key0 key0 5 test.t2.c 2
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1 PRIMARY <derived2> ref key0 key0 5 test.t2.c 1
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2 DERIVED t1 ALL NULL NULL NULL NULL 8 Using where; Using temporary; Using filesort
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# specivication of t contains having
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with t as (select a, count(*) from t1 where b >= 'c'
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@ -173,7 +173,7 @@ with t as (select count(*) as c from t1 where b >= 'c' group by a)
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select * from t2 where c in (select c from t);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 4 Using where
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1 PRIMARY <derived2> ref key0 key0 8 test.t2.c 2 Using where; FirstMatch(t2)
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1 PRIMARY <derived2> ref key0 key0 8 test.t2.c 1 Using where; FirstMatch(t2)
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2 DERIVED t1 ALL NULL NULL NULL NULL 8 Using where; Using temporary; Using filesort
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explain
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select * from t2
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@ -595,7 +595,7 @@ explain
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select * from v2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 4 Using where
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1 PRIMARY <derived2> ref key0 key0 5 test.t2.c 2
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1 PRIMARY <derived2> ref key0 key0 5 test.t2.c 1
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2 DERIVED t1 ALL NULL NULL NULL NULL 8 Using where; Using temporary; Using filesort
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# with clause in the specification of a view that whose definition
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# table alias for a with table
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@ -689,13 +689,13 @@ from ancestor_couple_ids c, coupled_ancestors h, coupled_ancestors w
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where c.h_id = h.id and c.w_id= w.id;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 100.00 Using where
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1 PRIMARY <derived3> ref key0 key0 5 c.h_id 2 100.00
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1 PRIMARY <derived3> ref key0 key0 5 c.w_id 2 100.00
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1 PRIMARY <derived3> ref key0 key0 5 c.h_id 1 100.00
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1 PRIMARY <derived3> ref key0 key0 5 c.w_id 1 100.00
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3 DERIVED folks ALL NULL NULL NULL NULL 12 100.00 Using where
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4 RECURSIVE UNION p ALL NULL NULL NULL NULL 12 100.00 Using where
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4 RECURSIVE UNION <derived2> ref key0 key0 5 test.p.id 2 100.00
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4 RECURSIVE UNION <derived2> ref key0 key0 5 test.p.id 1 100.00
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5 RECURSIVE UNION p ALL NULL NULL NULL NULL 12 100.00 Using where
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5 RECURSIVE UNION <derived2> ref key0 key0 5 test.p.id 2 100.00
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5 RECURSIVE UNION <derived2> ref key0 key0 5 test.p.id 1 100.00
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NULL UNION RESULT <union3,4,5> ALL NULL NULL NULL NULL NULL NULL
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2 DERIVED <derived3> ALL NULL NULL NULL NULL 12 100.00 Using where
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Warnings:
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@ -1238,9 +1238,9 @@ id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 12
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2 DERIVED folks ALL NULL NULL NULL NULL 12 Using where
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3 RECURSIVE UNION p ALL PRIMARY NULL NULL NULL 12
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3 RECURSIVE UNION <derived2> ref key0 key0 5 test.p.id 2
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3 RECURSIVE UNION <derived2> ref key0 key0 5 test.p.id 1
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4 RECURSIVE UNION p ALL PRIMARY NULL NULL NULL 12
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4 RECURSIVE UNION <derived2> ref key0 key0 5 test.p.id 2
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4 RECURSIVE UNION <derived2> ref key0 key0 5 test.p.id 1
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NULL UNION RESULT <union2,3,4> ALL NULL NULL NULL NULL NULL
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with recursive
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ancestors
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@ -3210,7 +3210,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 16 100.00
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2 DERIVED a ALL NULL NULL NULL NULL 16 100.00 Using where
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3 RECURSIVE UNION b ALL NULL NULL NULL NULL 16 100.00 Using where
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3 RECURSIVE UNION <derived2> ref key0 key0 35 test.b.departure 2 100.00
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3 RECURSIVE UNION <derived2> ref key0 key0 35 test.b.departure 1 100.00
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4 DEPENDENT SUBQUERY <derived2> ALL NULL NULL NULL NULL 16 100.00 Using where
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NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
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Warnings:
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@ -3313,9 +3313,9 @@ id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY <derived2> ALL NULL NULL NULL NULL 15 Using filesort
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2 DERIVED t2 ALL NULL NULL NULL NULL 15 Using where
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3 RECURSIVE UNION t2 ALL NULL NULL NULL NULL 15 Using where
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3 RECURSIVE UNION <derived2> ref key0 key0 5 test.t2.id 2
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3 RECURSIVE UNION <derived2> ref key0 key0 5 test.t2.id 1
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4 RECURSIVE UNION t2 ALL NULL NULL NULL NULL 15 Using where
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4 RECURSIVE UNION <derived2> ref key0 key0 5 test.t2.id 2
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4 RECURSIVE UNION <derived2> ref key0 key0 5 test.t2.id 1
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NULL UNION RESULT <union2,3,4> ALL NULL NULL NULL NULL NULL
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DROP TABLE t1,t2;
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set tmp_memory_table_size=default;
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@ -4168,7 +4168,7 @@ id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used
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2 DERIVED s ALL NULL NULL NULL NULL 4
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3 RECURSIVE UNION t1 ALL NULL NULL NULL NULL 4 Using where
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3 RECURSIVE UNION <derived2> ref key0 key0 9 test.t1.c 2
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3 RECURSIVE UNION <derived2> ref key0 key0 9 test.t1.c 1
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NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
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4 UNION <derived2> ALL NULL NULL NULL NULL 4
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with recursive r_cte as
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@ -4292,7 +4292,7 @@ ANALYZE
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"ref": ["test.t1.c"],
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"loops": 4,
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"r_loops": 4,
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"rows": 2,
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"rows": 1,
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"r_rows": 0.5,
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"cost": "REPLACED",
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"r_table_time_ms": "REPLACED",
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@ -4545,7 +4545,7 @@ NULL UNION RESULT <union4,5> ALL NULL NULL NULL NULL NULL
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3 DERIVED h ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
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3 DERIVED w ALL NULL NULL NULL NULL 12 Using where; Using join buffer (incremental, BNL join)
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2 RECURSIVE UNION h ALL NULL NULL NULL NULL 12 Using where
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2 RECURSIVE UNION <derived4> ref key0 key0 5 test.h.id 2
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2 RECURSIVE UNION <derived4> ref key0 key0 5 test.h.id 1
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2 RECURSIVE UNION w ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
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NULL UNION RESULT <union3,2> ALL NULL NULL NULL NULL NULL
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prepare stmt from "with recursive
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@ -4643,7 +4643,7 @@ id select_type table type possible_keys key key_len ref rows Extra
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5 RECURSIVE UNION <derived2> ALL NULL NULL NULL NULL 2
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NULL UNION RESULT <union3,4,5> ALL NULL NULL NULL NULL NULL
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2 DERIVED h ALL NULL NULL NULL NULL 12 Using where
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2 DERIVED <derived3> ref key0 key0 5 test.h.id 2
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2 DERIVED <derived3> ref key0 key0 5 test.h.id 1
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2 DERIVED w ALL NULL NULL NULL NULL 12 Using where; Using join buffer (flat, BNL join)
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prepare stmt from "with recursive
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ancestor_couples(h_id, h_name, h_dob, h_father, h_mother,
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@ -39,7 +39,7 @@ explain
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select * from t1, (select f1(sal) as a from t1 where id>= 1) q where q.a=t1.sal;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where
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1 PRIMARY <derived2> ref key0 key0 5 test.t1.sal 2
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1 PRIMARY <derived2> ref key0 key0 5 test.t1.sal 1
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2 DERIVED t1 ALL NULL NULL NULL NULL 3 Using where
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show status like "%custom_aggregate%";
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Variable_name Value
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@ -1292,7 +1292,7 @@ id select_type table type possible_keys key key_len ref rows r_rows filtered r_f
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analyze select * from t1 , ((select distinct t2.a, t2.b from t2 order by c))q where t1.a=q.a;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 6 6.00 100.00 100.00 Using where
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1 PRIMARY <derived2> ref key0 key0 5 test.t1.a 2 1.00 100.00 100.00
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1 PRIMARY <derived2> ref key0 key0 5 test.t1.a 1 1.00 100.00 100.00
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2 DERIVED t2 ALL NULL NULL NULL NULL 6 6.00 100.00 100.00 Using temporary; Using filesort
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# multiple selects in derived table
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# NO UNION ALL
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File diff suppressed because it is too large
Load Diff
@ -92,13 +92,13 @@ pla_id test
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explain SELECT STRAIGHT_JOIN d.pla_id, m2.mat_id FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY m2 ALL NULL NULL NULL NULL 9
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1 PRIMARY <derived2> ref key0 key0 7 test.m2.matintnum 2
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1 PRIMARY <derived2> ref key0 key0 7 test.m2.matintnum 1
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2 DERIVED mp ALL NULL NULL NULL NULL 9 Using temporary; Using filesort
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2 DERIVED m1 eq_ref PRIMARY PRIMARY 3 test.mp.mat_id 1
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explain SELECT STRAIGHT_JOIN d.pla_id, m2.test FROM t1 m2 INNER JOIN (SELECT mp.pla_id, MIN(m1.matintnum) AS matintnum FROM t2 mp INNER JOIN t1 m1 ON mp.mat_id=m1.mat_id GROUP BY mp.pla_id) d ON d.matintnum=m2.matintnum;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY m2 ALL NULL NULL NULL NULL 9
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1 PRIMARY <derived2> ref key0 key0 7 test.m2.matintnum 2
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1 PRIMARY <derived2> ref key0 key0 7 test.m2.matintnum 1
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2 DERIVED mp ALL NULL NULL NULL NULL 9 Using temporary; Using filesort
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2 DERIVED m1 eq_ref PRIMARY PRIMARY 3 test.mp.mat_id 1
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drop table t1,t2;
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@ -534,7 +534,7 @@ ON t2.id=t.id
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WHERE t2.id < 3;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 Using index condition
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1 PRIMARY <derived2> ref key0 key0 5 test.t2.id 2
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1 PRIMARY <derived2> ref key0 key0 5 test.t2.id 1
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2 DERIVED t1 ALL NULL NULL NULL NULL 8 Using temporary; Using filesort
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set join_cache_level=default;
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set optimizer_switch= @save_optimizer_switch;
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@ -20,7 +20,7 @@ EXPLAIN SELECT t1.n1 FROM t1, (SELECT n1, n2 FROM t1 WHERE c1 = 'a' GROUP BY n1)
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WHERE t.n1 = t1.n1 AND t.n2 = t1.n2 AND c1 = 'a' GROUP BY n1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ref c1,n1_c1_n2 c1 1 const 2 Using index condition; Using where; Using temporary; Using filesort
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1 PRIMARY <derived2> ref key0 key0 8 test.t1.n1,test.t1.n2 2
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1 PRIMARY <derived2> ref key0 key0 8 test.t1.n1,test.t1.n2 1
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2 LATERAL DERIVED t1 ref c1,n1_c1_n2 n1_c1_n2 4 test.t1.n1 1 Using where; Using index
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SELECT t1.n1 FROM t1, (SELECT n1, n2 FROM t1 WHERE c1 = 'a' GROUP BY n1) as t
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WHERE t.n1 = t1.n1 AND t.n2 = t1.n2 AND c1 = 'a' GROUP BY n1;
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@ -49,7 +49,7 @@ t2
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WHERE t2.id2=t.id2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where
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1 PRIMARY <derived2> ref key0 key0 5 test.t2.id2 2
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1 PRIMARY <derived2> ref key0 key0 5 test.t2.id2 1
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2 DERIVED t3 ALL NULL NULL NULL NULL 1 Using where; Using temporary; Using filesort
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2 DERIVED t1 eq_ref PRIMARY,id2 PRIMARY 4 test.t3.i3 1
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2 DERIVED t2 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (flat, BNL join)
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@ -99,7 +99,7 @@ ON t2.id=t.id
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WHERE t2.id < 3;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 Using where
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1 PRIMARY <derived2> ref key0 key0 5 test.t2.id 2
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1 PRIMARY <derived2> ref key0 key0 5 test.t2.id 1
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2 LATERAL DERIVED t1 eq_ref PRIMARY PRIMARY 4 test.t2.id 1
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set join_cache_level=default;
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DROP TABLE t1,t2;
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@ -162,7 +162,7 @@ WHERE
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t1.a = dt.a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 index a,a_2 a_2 10 NULL 6 Using where; Using index
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1 PRIMARY <derived3> ref key0 key0 5 test.t1.a 2
|
||||
1 PRIMARY <derived3> ref key0 key0 5 test.t1.a 1
|
||||
3 DERIVED t1_inner index NULL a_2 10 NULL 6 Using where; Using index
|
||||
3 DERIVED t2_inner ref c c 5 test.t1_inner.b 1 Using index
|
||||
set statement optimizer_switch='split_materialized=on' for EXPLAIN
|
||||
@ -174,7 +174,7 @@ WHERE
|
||||
t1.a = dt.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index a,a_2 a_2 10 NULL 6 Using where; Using index
|
||||
1 PRIMARY <derived3> ref key0 key0 5 test.t1.a 2
|
||||
1 PRIMARY <derived3> ref key0 key0 5 test.t1.a 1
|
||||
3 DERIVED t1_inner index a,a_2 a_2 10 NULL 6 Using where; Using index
|
||||
3 DERIVED t2_inner ref c c 5 test.t1_inner.b 1 Using index
|
||||
DROP TABLE t1, t2;
|
||||
@ -209,7 +209,7 @@ where t1.id = dt.id and t1.itemid = dt.itemid and t2.id=t1.itemid;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 1
|
||||
1 PRIMARY t1 ref idx idx 4 test.t2.id 1
|
||||
1 PRIMARY <derived2> ref key0 key0 9 test.t2.id,test.t1.id 2
|
||||
1 PRIMARY <derived2> ref key0 key0 9 test.t2.id,test.t1.id 1
|
||||
2 DERIVED t3 ref idx1,idx2 idx1 4 const 5 Using where; Using index
|
||||
select t1.id, t1.itemid, dt.id, t2.id
|
||||
from t1,
|
||||
@ -228,7 +228,7 @@ where t1.id = dt.id and t1.itemid = dt.itemid and t2.id=t1.itemid;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 1
|
||||
1 PRIMARY t1 ref idx idx 4 test.t2.id 1
|
||||
1 PRIMARY <derived2> ref key0 key0 9 test.t2.id,test.t1.id 2
|
||||
1 PRIMARY <derived2> ref key0 key0 9 test.t2.id,test.t1.id 1
|
||||
2 DERIVED t3 ref idx1 idx1 4 const 5 Using where; Using index
|
||||
select t1.id, t1.itemid, dt.id, t2.id
|
||||
from t1,
|
||||
@ -273,7 +273,7 @@ on t3.a=t.a and t3.c=t.c
|
||||
where t3.b > 15;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t3 range idx_b idx_b 5 NULL 2 Using index condition; Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 133 test.t3.a,test.t3.c 2
|
||||
1 PRIMARY <derived2> ref key0 key0 133 test.t3.a,test.t3.c 1
|
||||
2 LATERAL DERIVED t4 ref idx idx 133 test.t3.a,test.t3.c 1
|
||||
# ... and if one adds WITH ROLLUP, then LATERAL DERIVED is no longer used:
|
||||
explain select t3.a,t3.c,t.max,t.min
|
||||
|
||||
@ -214,7 +214,7 @@ explain extended
|
||||
select * from t1 join (select * from t2 group by f2) tt on f1=f2;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 11 100.00 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.f1 2 100.00
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.f1 1 100.00
|
||||
2 DERIVED t2 ALL NULL NULL NULL NULL 11 100.00 Using temporary; Using filesort
|
||||
Warnings:
|
||||
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`tt`.`f2` AS `f2`,`tt`.`f22` AS `f22` from `test`.`t1` join (/* select#2 */ select `test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`t2` group by `test`.`t2`.`f2`) `tt` where `tt`.`f2` = `test`.`t1`.`f1`
|
||||
@ -228,7 +228,7 @@ flush status;
|
||||
explain select * from t1 join (select * from t2 group by f2) tt on f1=f2;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 11 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.f1 2
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.f1 1
|
||||
2 DERIVED t2 ALL NULL NULL NULL NULL 11 Using temporary; Using filesort
|
||||
show status like 'Handler_read%';
|
||||
Variable_name Value
|
||||
@ -288,7 +288,7 @@ explain showing created indexes
|
||||
explain extended select * from t1 join v2 on f1=f2;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 11 100.00 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.f1 2 100.00
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.f1 1 100.00
|
||||
2 DERIVED t2 ALL NULL NULL NULL NULL 11 100.00 Using temporary; Using filesort
|
||||
Warnings:
|
||||
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f11` AS `f11`,`v2`.`f2` AS `f2`,`v2`.`f22` AS `f22` from `test`.`t1` join `test`.`v2` where `v2`.`f2` = `test`.`t1`.`f1`
|
||||
@ -339,7 +339,7 @@ flush status;
|
||||
explain select * from t1 join v2 on f1=f2;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 11 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.f1 2
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.f1 1
|
||||
2 DERIVED t2 ALL NULL NULL NULL NULL 11 Using temporary; Using filesort
|
||||
show status like 'Handler_read%';
|
||||
Variable_name Value
|
||||
@ -372,7 +372,7 @@ Handler_read_rnd_next 36
|
||||
explain extended select * from v1 join v4 on f1=f2;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 11 100.00 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t2.f2 2 100.00
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t2.f2 1 100.00
|
||||
2 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort
|
||||
Warnings:
|
||||
Note 1003 /* select#1 */ select `v1`.`f1` AS `f1`,`v1`.`f11` AS `f11`,`test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22` from `test`.`v1` join `test`.`t2` where `v1`.`f1` = `test`.`t2`.`f2` and `test`.`t2`.`f2` in (2,3)
|
||||
@ -404,7 +404,7 @@ EXPLAIN
|
||||
"used_key_parts": ["f1"],
|
||||
"ref": ["test.t2.f2"],
|
||||
"loops": 11,
|
||||
"rows": 2,
|
||||
"rows": 1,
|
||||
"cost": "COST_REPLACED",
|
||||
"filtered": 100,
|
||||
"materialized": {
|
||||
@ -569,7 +569,7 @@ join
|
||||
on x.f1 = z.f1;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY <derived3> ALL NULL NULL NULL NULL 11 100.00 Using where
|
||||
1 PRIMARY <derived5> ref key0 key0 5 tt.f1 2 100.00
|
||||
1 PRIMARY <derived5> ref key0 key0 5 tt.f1 1 100.00
|
||||
5 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort
|
||||
3 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort
|
||||
Warnings:
|
||||
@ -630,7 +630,7 @@ EXPLAIN
|
||||
"used_key_parts": ["f1"],
|
||||
"ref": ["tt.f1"],
|
||||
"loops": 11,
|
||||
"rows": 2,
|
||||
"rows": 1,
|
||||
"cost": "COST_REPLACED",
|
||||
"filtered": 100,
|
||||
"materialized": {
|
||||
@ -717,7 +717,7 @@ join
|
||||
on x.f1 = z.f1;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 11 100.00 Using where
|
||||
1 PRIMARY <derived4> ref key0 key0 5 x.f1 2 100.00
|
||||
1 PRIMARY <derived4> ref key0 key0 5 x.f1 1 100.00
|
||||
4 DERIVED <derived5> ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort
|
||||
5 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort
|
||||
2 DERIVED <derived3> ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort
|
||||
@ -806,7 +806,7 @@ EXPLAIN
|
||||
"used_key_parts": ["f1"],
|
||||
"ref": ["x.f1"],
|
||||
"loops": 11,
|
||||
"rows": 2,
|
||||
"rows": 1,
|
||||
"cost": "COST_REPLACED",
|
||||
"filtered": 100,
|
||||
"materialized": {
|
||||
@ -981,7 +981,7 @@ join of above two
|
||||
explain extended select * from v6 join v7 on f2=f1;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 11 100.00 Using where
|
||||
1 PRIMARY <derived5> ref key0 key0 5 test.t2.f2 2 100.00
|
||||
1 PRIMARY <derived5> ref key0 key0 5 test.t2.f2 1 100.00
|
||||
5 DERIVED t1 ALL NULL NULL NULL NULL 11 100.00 Using where; Using temporary; Using filesort
|
||||
Warnings:
|
||||
Note 1003 /* select#1 */ select `test`.`t2`.`f2` AS `f2`,`test`.`t2`.`f22` AS `f22`,`v1`.`f1` AS `f1`,`v1`.`f11` AS `f11` from `test`.`t2` join `test`.`v1` where `v1`.`f1` = `test`.`t2`.`f2` and `test`.`t2`.`f2` < 7 and `test`.`t2`.`f2` in (2,3)
|
||||
@ -1013,7 +1013,7 @@ EXPLAIN
|
||||
"used_key_parts": ["f1"],
|
||||
"ref": ["test.t2.f2"],
|
||||
"loops": 11,
|
||||
"rows": 2,
|
||||
"rows": 1,
|
||||
"cost": "COST_REPLACED",
|
||||
"filtered": 100,
|
||||
"materialized": {
|
||||
@ -1053,7 +1053,7 @@ test two keys
|
||||
explain select * from t1 join (select * from t2 group by f2) tt on t1.f1=tt.f2 join t1 xx on tt.f22=xx.f1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 11 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.f1 2
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.f1 1
|
||||
1 PRIMARY xx ALL NULL NULL NULL NULL 11 Using where; Using join buffer (flat, BNL join)
|
||||
2 DERIVED t2 ALL NULL NULL NULL NULL 11 Using temporary; Using filesort
|
||||
select * from t1 join (select * from t2 group by f2) tt on t1.f1=tt.f2 join t1 xx on tt.f22=xx.f1;
|
||||
@ -1078,7 +1078,7 @@ EXPLAIN
|
||||
SELECT * FROM v1 JOIN t2 ON v1.f1 = t2.f1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 index f1 f1 5 NULL 3 Using where; Using index
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t2.f1 2
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t2.f1 1
|
||||
2 DERIVED t1 ALL NULL NULL NULL NULL 4
|
||||
SELECT * FROM v1 JOIN t2 ON v1.f1 = t2.f1;
|
||||
f1 f1
|
||||
@ -1275,11 +1275,11 @@ SELECT * FROM t3
|
||||
WHERE t3.a IN (SELECT v1.a FROM v1, t2 WHERE t2.a = v1.b);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
||||
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
2 DEPENDENT SUBQUERY <derived3> ref key0 key0 5 test.t2.a 2 100.00 Using where
|
||||
2 DEPENDENT SUBQUERY <derived3> ref key1 key1 5 func 1 100.00
|
||||
2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
3 DERIVED t1 ALL NULL NULL NULL NULL 3 100.00 Using temporary; Using filesort
|
||||
Warnings:
|
||||
Note 1003 /* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <expr_cache><`test`.`t3`.`a`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(/* select#2 */ select `v1`.`a` from `test`.`v1` join `test`.`t2` where `v1`.`b` = `test`.`t2`.`a` and <cache>(`test`.`t3`.`a`) = `v1`.`a`)))
|
||||
Note 1003 /* select#1 */ select `test`.`t3`.`a` AS `a` from `test`.`t3` where <expr_cache><`test`.`t3`.`a`>(<in_optimizer>(`test`.`t3`.`a`,<exists>(/* select#2 */ select `v1`.`a` from `test`.`v1` join `test`.`t2` where `test`.`t2`.`a` = `v1`.`b` and <cache>(`test`.`t3`.`a`) = `v1`.`a`)))
|
||||
SELECT * FROM t3
|
||||
WHERE t3.a IN (SELECT v1.a FROM v1, t2 WHERE t2.a = v1.b);
|
||||
a
|
||||
@ -1308,8 +1308,8 @@ FROM (SELECT DISTINCT t1.* FROM t1,t2 WHERE t2.f2 = t1.f2) t,t3,t4
|
||||
WHERE t4.f2 = t3.f2 AND t4.f2 = t.f1 ORDER BY f;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t4 index f2 f2 9 NULL 2 Using where; Using index; Using temporary; Using filesort
|
||||
1 PRIMARY t3 ref f2 f2 4 test.t4.f2 2 Using index
|
||||
1 PRIMARY <derived2> ref key0 key0 4 test.t4.f2 2
|
||||
1 PRIMARY <derived2> ref key1 key1 4 test.t4.f2 1
|
||||
1 PRIMARY t3 ref f2 f2 4 test.t4.f2 1 Using index
|
||||
2 DERIVED t2 system NULL NULL NULL NULL 1 Using temporary
|
||||
2 DERIVED t1 ref f2 f2 4 const 2 Using where
|
||||
SELECT t.f1 AS f
|
||||
@ -1335,7 +1335,7 @@ EXPLAIN
|
||||
SELECT * FROM t1 AS t JOIN v1 AS v WHERE t.a = v.b AND t.b = v.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t ALL NULL NULL NULL NULL 3 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t.a 2
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t.a 1
|
||||
2 DERIVED t1 ALL NULL NULL NULL NULL 3
|
||||
SELECT * FROM t1 AS t JOIN v1 AS v WHERE t.a = v.b AND t.b = v.b;
|
||||
a b a b
|
||||
@ -1641,7 +1641,7 @@ EXPLAIN
|
||||
SELECT a FROM t1 WHERE (a,b) IN (SELECT * FROM v1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
|
||||
1 PRIMARY <derived3> ref key0 key0 10 test.t1.a,test.t1.b 2 FirstMatch(t1)
|
||||
1 PRIMARY <derived3> ref key0 key0 10 test.t1.a,test.t1.b 1 FirstMatch(t1)
|
||||
3 DERIVED t2 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort
|
||||
SELECT * FROM v2;
|
||||
a b
|
||||
@ -1940,14 +1940,14 @@ WHERE (t2.a ,t1.b) NOT IN (SELECT DISTINCT c,a FROM t3 t);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY t index_subquery PRIMARY,c c 8 func,func 2 Using index; Using where
|
||||
2 DEPENDENT SUBQUERY t index_subquery PRIMARY,c c 8 func,func 1 Using index; Using where
|
||||
EXPLAIN
|
||||
SELECT * FROM t1 , t2
|
||||
WHERE (t2.a ,t1.b) NOT IN (SELECT DISTINCT c,a FROM (SELECT * FROM t3) t);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY t3 index_subquery PRIMARY,c c 8 func,func 2 Using index; Using where
|
||||
2 DEPENDENT SUBQUERY t3 index_subquery PRIMARY,c c 8 func,func 1 Using index; Using where
|
||||
SELECT * FROM t1 , t2
|
||||
WHERE (t2.a ,t1.b) NOT IN (SELECT DISTINCT c,a FROM (SELECT * FROM t3) t);
|
||||
b a
|
||||
@ -2014,7 +2014,7 @@ EXPLAIN
|
||||
SELECT * FROM t1 WHERE t1.b IN (SELECT v2.a FROM v2 WHERE v2.b = t1.a);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
|
||||
1 PRIMARY <derived3> ref key0 key0 10 test.t1.b,test.t1.a 2 FirstMatch(t1)
|
||||
1 PRIMARY <derived3> ref key0 key0 10 test.t1.b,test.t1.a 1 FirstMatch(t1)
|
||||
3 DERIVED t2 ALL NULL NULL NULL NULL 2
|
||||
SELECT * FROM t1 WHERE t1.b IN (SELECT v2.a FROM v2 WHERE v2.b = t1.a);
|
||||
a b
|
||||
@ -2068,7 +2068,7 @@ EXPLAIN
|
||||
SELECT v1.a FROM v1,v2 WHERE v2.b = v1.b ORDER BY 1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 3 Using where; Using filesort
|
||||
1 PRIMARY <derived3> ref key0 key0 4 v1.b 2
|
||||
1 PRIMARY <derived3> ref key0 key0 4 v1.b 1
|
||||
3 DERIVED t2 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort
|
||||
2 DERIVED t1 ALL NULL NULL NULL NULL 3 Using temporary; Using filesort
|
||||
DROP VIEW v1,v2;
|
||||
@ -2659,7 +2659,7 @@ EXPLAIN EXTENDED
|
||||
SELECT v1.c1, v1.c2 FROM v1, t2 WHERE v1.c1=t2.c1 AND v1.c2=t2.c2;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t2.c2 2 100.00 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t2.c2 1 100.00 Using where
|
||||
2 DERIVED t1 ALL NULL NULL NULL NULL 5 100.00
|
||||
Warnings:
|
||||
Note 1003 /* select#1 */ select `v1`.`c1` AS `c1`,`v1`.`c2` AS `c2` from `test`.`v1` join `test`.`t2` where `v1`.`c1` = `test`.`t2`.`c1` and `v1`.`c2` = `test`.`t2`.`c2`
|
||||
@ -2672,7 +2672,7 @@ SELECT t2.c1, t2.c2 FROM (SELECT c1 g, MAX(c2) m FROM t1 GROUP BY c1) t, t2
|
||||
WHERE t.g=t2.c1 AND t.m=t2.c2;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t2.c2 2 100.00 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t2.c2 1 100.00 Using where
|
||||
2 DERIVED t1 ALL NULL NULL NULL NULL 5 100.00 Using temporary; Using filesort
|
||||
Warnings:
|
||||
Note 1003 /* select#1 */ select `test`.`t2`.`c1` AS `c1`,`test`.`t2`.`c2` AS `c2` from (/* select#2 */ select `test`.`t1`.`c1` AS `g`,max(`test`.`t1`.`c2`) AS `m` from `test`.`t1` group by `test`.`t1`.`c1`) `t` join `test`.`t2` where `t`.`g` = `test`.`t2`.`c1` and `t`.`m` = `test`.`t2`.`c2`
|
||||
@ -3003,7 +3003,7 @@ GROUP BY mp.pla_id) d
|
||||
ON d.matintnum=m2.matintnum;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY m2 ALL NULL NULL NULL NULL 9
|
||||
1 PRIMARY <derived2> ref key0 key0 7 test.m2.matintnum 2
|
||||
1 PRIMARY <derived2> ref key0 key0 7 test.m2.matintnum 1
|
||||
2 DERIVED mp ALL NULL NULL NULL NULL 9 Using temporary; Using filesort
|
||||
2 DERIVED m1 eq_ref PRIMARY PRIMARY 3 test.mp.mat_id 1
|
||||
prepare stmt1 from
|
||||
@ -3137,7 +3137,7 @@ EXPLAIN EXTENDED
|
||||
SELECT * FROM t1 LEFT JOIN v2 ON t1.id=v2.order_pk;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.id 2 100.00
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.id 1 100.00
|
||||
2 LATERAL DERIVED t1 eq_ref PRIMARY PRIMARY 4 test.t1.id 1 100.00 Using where; Using index
|
||||
Warnings:
|
||||
Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`v2`.`order_pk` AS `order_pk` from `test`.`t1` left join `test`.`v2` on(`v2`.`order_pk` = `test`.`t1`.`id`) where 1
|
||||
@ -3151,7 +3151,7 @@ EXPLAIN EXTENDED
|
||||
SELECT * FROM t1 LEFT JOIN v3 ON t1.id=v3.order_pk;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.id 2 100.00
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.id 1 100.00
|
||||
2 LATERAL DERIVED t1 eq_ref PRIMARY PRIMARY 4 test.t1.id 1 100.00 Using where; Using index
|
||||
Warnings:
|
||||
Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`v3`.`order_pk` AS `order_pk` from `test`.`t1` left join `test`.`v3` on(`v3`.`order_pk` = `test`.`t1`.`id`) where 1
|
||||
|
||||
@ -173,9 +173,9 @@ INSERT INTO t2 values (1),(2),(3);
|
||||
INSERT INTO t3 VALUES (1,'1'),(2,'2'),(1,'1'),(2,'2');
|
||||
explain SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 index a a 4 NULL 5 Using index; Using temporary
|
||||
1 SIMPLE t1 eq_ref PRIMARY PRIMARY 4 test.t2.a 1 Using where
|
||||
1 SIMPLE t3 ref a a 5 test.t1.b 2 Using index
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 4 Using where; Using temporary
|
||||
1 SIMPLE t3 ref a a 5 test.t1.b 1 Using index
|
||||
1 SIMPLE t2 ref a a 4 test.t1.a 1 Using index; Distinct
|
||||
SELECT distinct t3.a FROM t3,t2,t1 WHERE t3.a=t1.b AND t1.a=t2.a;
|
||||
a
|
||||
1
|
||||
|
||||
@ -696,7 +696,7 @@ EXPLAIN
|
||||
"used_key_parts": ["cnt"],
|
||||
"ref": ["test.tbl2.a"],
|
||||
"loops": 10,
|
||||
"rows": 2,
|
||||
"rows": 1,
|
||||
"cost": "COST_REPLACED",
|
||||
"filtered": 100,
|
||||
"attached_condition": "tbl1.cnt = tbl2.a",
|
||||
|
||||
@ -552,12 +552,12 @@ a b
|
||||
3 1
|
||||
explain select t1.a,t2.b from t1,t2 where t1.a=t2.a group by t1.a,t2.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL a NULL NULL NULL 4 Using temporary; Using filesort
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort
|
||||
1 SIMPLE t2 ref a a 4 test.t1.a 1
|
||||
explain select t1.a,t2.b from t1,t2 where t1.a=t2.a group by t1.a,t2.b ORDER BY NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL a NULL NULL NULL 4 Using temporary
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 6 Using temporary
|
||||
1 SIMPLE t2 ref a a 4 test.t1.a 1
|
||||
drop table t1,t2;
|
||||
SET @@optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity,@@optimizer_switch=@save_optimizer_switch;
|
||||
create table t1 (a int, b int);
|
||||
@ -1972,8 +1972,8 @@ SELECT a, AVG(t1.b),
|
||||
FROM t1 GROUP BY a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index NULL a 10 NULL 9 Using index
|
||||
3 DEPENDENT SUBQUERY t12 ref a a 10 func,func 2 Using index condition
|
||||
2 DEPENDENT SUBQUERY t11 ref a a 10 func,func 2 Using index condition
|
||||
3 DEPENDENT SUBQUERY t12 ref a a 10 func,func 1 Using index condition
|
||||
2 DEPENDENT SUBQUERY t11 ref a a 10 func,func 1 Using index condition
|
||||
SELECT a, AVG(t1.b),
|
||||
(SELECT t11.c FROM t1 t11 WHERE t11.a = t1.a AND t11.b = AVG(t1.b)) AS t11c,
|
||||
(SELECT t12.c FROM t1 t12 WHERE t12.a = t1.a AND t12.b = AVG(t1.b)) AS t12c
|
||||
|
||||
@ -2233,7 +2233,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range PRIMARY PRIMARY 7 NULL 1 Using where; Using index for group-by
|
||||
EXPLAIN SELECT a FROM t1 WHERE a='BB' GROUP BY a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref PRIMARY PRIMARY 7 const 1 Using where; Using index
|
||||
1 SIMPLE t1 range PRIMARY PRIMARY 7 NULL 1 Using where; Using index for group-by
|
||||
SELECT DISTINCT a FROM t1 WHERE a='BB';
|
||||
a
|
||||
BB
|
||||
|
||||
@ -1026,7 +1026,7 @@ GROUP BY v1.a
|
||||
HAVING (v1.a>1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 4 Using where; Using temporary; Using filesort
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t2.x 2
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t2.x 1
|
||||
2 DERIVED t1 ALL NULL NULL NULL NULL 5 Using where; Using temporary; Using filesort
|
||||
explain format=json SELECT v1.a
|
||||
FROM t2,v1
|
||||
@ -1063,7 +1063,7 @@ EXPLAIN
|
||||
"used_key_parts": ["a"],
|
||||
"ref": ["test.t2.x"],
|
||||
"loops": 4,
|
||||
"rows": 2,
|
||||
"rows": 1,
|
||||
"cost": "COST_REPLACED",
|
||||
"filtered": 100,
|
||||
"materialized": {
|
||||
@ -1131,7 +1131,7 @@ EXPLAIN
|
||||
"used_key_parts": ["a"],
|
||||
"ref": ["test.t2.x"],
|
||||
"loops": 4,
|
||||
"rows": 2,
|
||||
"rows": 1,
|
||||
"cost": "COST_REPLACED",
|
||||
"filtered": 100,
|
||||
"materialized": {
|
||||
@ -1189,7 +1189,7 @@ GROUP BY v1.c
|
||||
HAVING (v1.c>2);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 4 Using where; Using temporary; Using filesort
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t2.x 2 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t2.x 1 Using where
|
||||
2 DERIVED t1 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort
|
||||
explain format=json SELECT v1.a,v1.c
|
||||
FROM t2,v1
|
||||
@ -1226,7 +1226,7 @@ EXPLAIN
|
||||
"used_key_parts": ["a"],
|
||||
"ref": ["test.t2.x"],
|
||||
"loops": 4,
|
||||
"rows": 2,
|
||||
"rows": 1,
|
||||
"cost": "COST_REPLACED",
|
||||
"filtered": 100,
|
||||
"attached_condition": "v1.c > 2",
|
||||
@ -1295,7 +1295,7 @@ EXPLAIN
|
||||
"used_key_parts": ["a"],
|
||||
"ref": ["test.t2.x"],
|
||||
"loops": 4,
|
||||
"rows": 2,
|
||||
"rows": 1,
|
||||
"cost": "COST_REPLACED",
|
||||
"filtered": 100,
|
||||
"attached_condition": "v1.c > 2",
|
||||
|
||||
@ -4012,7 +4012,7 @@ GROUP BY t1.a
|
||||
WHERE d_tab.a=t3.x AND d_tab.a<5 AND d_tab.max_c<70;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 8 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t3.x 2 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t3.x 1 Using where
|
||||
2 DERIVED t1 ALL NULL NULL NULL NULL 16 Using where; Using temporary; Using filesort
|
||||
2 DERIVED <subquery3> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1
|
||||
3 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
|
||||
@ -4059,7 +4059,7 @@ EXPLAIN
|
||||
"used_key_parts": ["a"],
|
||||
"ref": ["test.t3.x"],
|
||||
"loops": 8,
|
||||
"rows": 2,
|
||||
"rows": 1,
|
||||
"cost": "COST_REPLACED",
|
||||
"filtered": 100,
|
||||
"attached_condition": "d_tab.max_c < 70",
|
||||
@ -4210,7 +4210,7 @@ GROUP BY t1.a
|
||||
WHERE d_tab.a=t3.x AND d_tab.a<5 AND d_tab.max_c<70;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 8 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t3.x 2 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t3.x 1 Using where
|
||||
2 DERIVED t1 ALL NULL NULL NULL NULL 16 Using where; Using temporary; Using filesort
|
||||
2 DERIVED <subquery3> eq_ref distinct_key distinct_key 12 test.t1.a,test.t1.b,test.t1.c 1
|
||||
3 MATERIALIZED t2 ALL NULL NULL NULL NULL 12 Using where; Using temporary
|
||||
@ -4257,7 +4257,7 @@ EXPLAIN
|
||||
"used_key_parts": ["a"],
|
||||
"ref": ["test.t3.x"],
|
||||
"loops": 8,
|
||||
"rows": 2,
|
||||
"rows": 1,
|
||||
"cost": "COST_REPLACED",
|
||||
"filtered": 100,
|
||||
"attached_condition": "d_tab.max_c < 70",
|
||||
|
||||
@ -392,7 +392,7 @@ SELECT a FROM t1 AS t, t2 as t2_out
|
||||
WHERE t2_out.c = t.a AND t.b IN (SELECT b FROM t1, t2 WHERE b = t.b);
|
||||
a
|
||||
24
|
||||
Last_query_cost 0.119652
|
||||
Last_query_cost 0.120558
|
||||
DROP TABLE t1,t2;
|
||||
#
|
||||
# LP Bug #923236: hash join + extended_keys = on
|
||||
|
||||
@ -1115,7 +1115,7 @@ ON t4.a = t5.a
|
||||
ON t1.a = t3.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t3 ref a a 5 test.t1.a 2 Using where; Using index
|
||||
1 SIMPLE t3 ref a a 5 test.t1.a 1 Using where; Using index
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 0 Using where
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 0 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 0 Using where
|
||||
@ -1486,7 +1486,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE D system PRIMARY NULL NULL NULL 1
|
||||
1 SIMPLE DSAR system NULL NULL NULL NULL 1
|
||||
1 SIMPLE DSA ref PRIMARY PRIMARY 4 const 3 Using where; Using index
|
||||
1 SIMPLE DT ref t_id t_id 2 test.DSA.t_id 2 Using where
|
||||
1 SIMPLE DT ref t_id t_id 2 test.DSA.t_id 1 Using where
|
||||
SELECT * FROM t5 DU, t1 D, t4 DT, t2 DSA, t3 DSAR
|
||||
WHERE DU.dog_id=D.dog_id AND D.dog_id=DT.dog_id AND D.birthday=DT.birthday AND
|
||||
DT.t_id=DSA.t_id AND DT.birthday=DSA.birthday AND DSA.dog_id=DSAR.dog_id;
|
||||
|
||||
@ -3125,15 +3125,15 @@ t1.metaid = t2.metaid AND t1.affiliateid = '2';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t6 system PRIMARY NULL NULL NULL 1
|
||||
1 SIMPLE t5 ref PRIMARY,t5_formattypeid t5_formattypeid 4 const 1
|
||||
1 SIMPLE t9 index PRIMARY,t9_subgenreid,t9_metaid PRIMARY 8 NULL 2 Using index; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t9.metaid 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t4 ref PRIMARY,t4_formatclassid,t4_formats_idx t4_formatclassid 4 test.t5.formatclassid 1 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t3 ref t3_metaid,t3_formatid,t3_metaidformatid t3_formatid 4 test.t4.formatid 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t1 ref t1_affiliateid,t1_metaid t1_metaid 4 test.t3.metaid 1 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t3.metaid 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t7 ref PRIMARY PRIMARY 4 test.t3.metaid 1 Using index
|
||||
1 SIMPLE t8 eq_ref PRIMARY PRIMARY 4 test.t7.artistid 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t9 ref PRIMARY,t9_subgenreid,t9_metaid t9_metaid 4 test.t3.metaid 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t10 eq_ref PRIMARY,t10_genreid PRIMARY 4 test.t9.subgenreid 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t11 eq_ref PRIMARY PRIMARY 4 test.t10.genreid 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t7 ref PRIMARY PRIMARY 4 test.t9.metaid 1 Using index
|
||||
1 SIMPLE t8 eq_ref PRIMARY PRIMARY 4 test.t7.artistid 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t3 ref t3_metaid,t3_formatid,t3_metaidformatid t3_metaidformatid 4 test.t9.metaid 1 Using index condition; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t4 eq_ref PRIMARY,t4_formatclassid,t4_formats_idx PRIMARY 4 test.t3.formatid 1 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t1 ref t1_affiliateid,t1_metaid t1_affiliateid 4 const 2 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
SELECT t1.uniquekey, t1.xml AS affiliateXml,
|
||||
t8.name AS artistName, t8.artistid,
|
||||
t11.name AS genreName, t11.genreid, t11.priority AS genrePriority,
|
||||
@ -3273,7 +3273,7 @@ EXPLAIN
|
||||
SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a WHERE t2.b IS NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref i_a i_a 4 test.t1.a 2 Using where; Not exists
|
||||
1 SIMPLE t2 ref i_a i_a 4 test.t1.a 1 Using where; Not exists
|
||||
SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a WHERE t2.b IS NULL;
|
||||
a a b
|
||||
3 NULL NULL
|
||||
@ -3284,7 +3284,7 @@ EXPLAIN
|
||||
SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a WHERE t2.b IS NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref i_a i_a 4 test.t1.a 2 Using where; Not exists; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t2 ref i_a i_a 4 test.t1.a 1 Using where; Not exists; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
SELECT * FROM t1 LEFT JOIN t2 ON t1.a=t2.a WHERE t2.b IS NULL;
|
||||
a a b
|
||||
3 NULL NULL
|
||||
@ -3311,7 +3311,7 @@ select t1.a, count(t2.p) as count
|
||||
from t1 left join t2 on t1.a=t2.a and t2.p % 2 = 1 group by t1.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 index NULL PRIMARY 4 NULL 8 Using index; Using temporary; Using filesort
|
||||
1 SIMPLE t2 ref i_a i_a 5 test.t1.a 2 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t2 ref i_a i_a 5 test.t1.a 1 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
select t1.a, count(t2.p) as count
|
||||
from t1 left join t2 on t1.a=t2.a and t2.p % 2 = 1 group by t1.a;
|
||||
a count
|
||||
@ -4085,7 +4085,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.carrier 1 Using where
|
||||
1 SIMPLE t4 ref carrier_id carrier_id 5 test.t3.id 2 Using index
|
||||
1 SIMPLE t4 ref carrier_id carrier_id 5 test.t3.id 1 Using index
|
||||
SET join_cache_level=@save_join_cache_level;
|
||||
DROP TABLE t1,t2,t3,t4;
|
||||
#
|
||||
@ -4101,7 +4101,7 @@ set join_cache_level = 5;
|
||||
explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t2 ref b b 5 test.t1.b 2 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t2 ref b b 5 test.t1.b 1 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
a
|
||||
NULL
|
||||
@ -4110,7 +4110,7 @@ set join_cache_level = 8;
|
||||
explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t2 ref b b 5 test.t1.b 2 Using where; Using join buffer (flat, BKAH join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t2 ref b b 5 test.t1.b 1 Using where; Using join buffer (flat, BKAH join); Key-ordered Rowid-ordered scan
|
||||
SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
a
|
||||
NULL
|
||||
@ -4121,7 +4121,7 @@ set join_cache_level = 5;
|
||||
explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t2 ref b b 5 test.t1.b 2 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t2 ref b b 5 test.t1.b 1 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
a
|
||||
NULL
|
||||
@ -4136,7 +4136,7 @@ set join_cache_level = 5;
|
||||
explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t2 ref b b 103 test.t1.b 2 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t2 ref b b 103 test.t1.b 1 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
a
|
||||
NULL
|
||||
@ -4145,7 +4145,7 @@ set join_cache_level = 8;
|
||||
explain SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t2 ref b b 103 test.t1.b 2 Using where; Using join buffer (flat, BKAH join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t2 ref b b 103 test.t1.b 1 Using where; Using join buffer (flat, BKAH join); Key-ordered Rowid-ordered scan
|
||||
SELECT t2.a FROM t1 LEFT JOIN t2 ON t2.b = t1.b;
|
||||
a
|
||||
NULL
|
||||
@ -4529,7 +4529,7 @@ EXPLAIN
|
||||
SELECT t2.i FROM t1,t2 WHERE t1.cu = t2.cl ;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 6
|
||||
1 SIMPLE t1 ref cu cu 33 func 2 Using where; Using index
|
||||
1 SIMPLE t1 ref cu cu 33 func 1 Using where; Using index
|
||||
SELECT t2.i FROM t1,t2 WHERE t1.cu = t2.cl ;
|
||||
i
|
||||
6
|
||||
@ -4862,7 +4862,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t4 ref idx idx 5 test.t1.a1 2 100.00 Using where
|
||||
1 SIMPLE t4 ref idx idx 5 test.t1.a1 1 100.00 Using where
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`pk` AS `pk`,`test`.`t1`.`a1` AS `a1`,`test`.`t2`.`pk` AS `pk`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`c2` AS `c2`,`test`.`t2`.`d2` AS `d2`,`test`.`t3`.`pk` AS `pk`,`test`.`t3`.`a3` AS `a3`,`test`.`t3`.`c3` AS `c3`,`test`.`t3`.`d3` AS `d3`,`test`.`t4`.`pk` AS `pk`,`test`.`t4`.`a4` AS `a4`,`test`.`t5`.`pk` AS `pk`,`test`.`t5`.`a5` AS `a5` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(`test`.`t2`.`d2` = `test`.`t1`.`pk` and `test`.`t3`.`a3` = `test`.`t2`.`c2`) left join `test`.`t4` on(`test`.`t4`.`a4` = `test`.`t1`.`a1` and `test`.`t1`.`a1` is not null) left join `test`.`t5` on(`test`.`t5`.`a5` = `test`.`t3`.`a3`) where 1
|
||||
@ -4884,7 +4884,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t4 ref idx idx 5 test.t1.a1 2 100.00 Using where
|
||||
1 SIMPLE t4 ref idx idx 5 test.t1.a1 1 100.00 Using where
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`pk` AS `pk`,`test`.`t1`.`a1` AS `a1`,`test`.`t2`.`pk` AS `pk`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`c2` AS `c2`,`test`.`t2`.`d2` AS `d2`,`test`.`t3`.`pk` AS `pk`,`test`.`t3`.`a3` AS `a3`,`test`.`t3`.`c3` AS `c3`,`test`.`t3`.`d3` AS `d3`,`test`.`t4`.`pk` AS `pk`,`test`.`t4`.`a4` AS `a4`,`test`.`t5`.`pk` AS `pk`,`test`.`t5`.`a5` AS `a5` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(`test`.`t2`.`d2` = `test`.`t1`.`pk` and `test`.`t3`.`a3` = `test`.`t2`.`c2`) left join `test`.`t4` on(`test`.`t4`.`a4` = `test`.`t1`.`a1` and `test`.`t1`.`a1` is not null) left join `test`.`t5` on(`test`.`t5`.`a5` = `test`.`t3`.`a3`) where 1
|
||||
@ -4906,7 +4906,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t4 ref idx idx 5 test.t1.a1 2 100.00 Using where
|
||||
1 SIMPLE t4 ref idx idx 5 test.t1.a1 1 100.00 Using where
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`pk` AS `pk`,`test`.`t1`.`a1` AS `a1`,`test`.`t2`.`pk` AS `pk`,`test`.`t2`.`a2` AS `a2`,`test`.`t2`.`c2` AS `c2`,`test`.`t2`.`d2` AS `d2`,`test`.`t3`.`pk` AS `pk`,`test`.`t3`.`a3` AS `a3`,`test`.`t3`.`c3` AS `c3`,`test`.`t3`.`d3` AS `d3`,`test`.`t4`.`pk` AS `pk`,`test`.`t4`.`a4` AS `a4`,`test`.`t5`.`pk` AS `pk`,`test`.`t5`.`a5` AS `a5` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(`test`.`t2`.`d2` = `test`.`t1`.`pk` and `test`.`t3`.`a3` = `test`.`t2`.`c2`) left join `test`.`t4` on(`test`.`t4`.`a4` = `test`.`t1`.`a1` and `test`.`t1`.`a1` is not null) left join `test`.`t5` on(`test`.`t5`.`a5` = `test`.`t3`.`a3`) where 1
|
||||
@ -5154,7 +5154,7 @@ EXPLAIN SELECT * FROM t1,t2
|
||||
WHERE t2.f3 = t1.f2 AND t1.f1 IN (9, 0, 100) ORDER BY t1.f2 LIMIT 1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range f1,f2 f1 5 NULL 3 Using where; Rowid-ordered scan; Using filesort
|
||||
1 SIMPLE t2 ref f3 f3 67 test.t1.f2 2 Using where; Using index
|
||||
1 SIMPLE t2 ref f3 f3 67 test.t1.f2 1 Using where; Using index
|
||||
SELECT * FROM t1,t2
|
||||
WHERE t2.f3 = t1.f2 AND t1.f1 IN (9, 0 ,100) ORDER BY t1.f2 LIMIT 1;
|
||||
f1 f2 f3
|
||||
@ -5164,7 +5164,7 @@ EXPLAIN SELECT * FROM t1,t2
|
||||
WHERE t2.f3 = t1.f2 AND t1.f1 IN (9, 0 ,100) ORDER BY t1.f2 LIMIT 1;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 range f1,f2 f1 5 NULL 3 Using index condition; Using where; Rowid-ordered scan; Using filesort
|
||||
1 SIMPLE t2 ref f3 f3 67 test.t1.f2 2 Using where; Using index
|
||||
1 SIMPLE t2 ref f3 f3 67 test.t1.f2 1 Using where; Using index
|
||||
SELECT * FROM t1,t2
|
||||
WHERE t2.f3 = t1.f2 AND t1.f1 IN (9, 0 ,100) ORDER BY t1.f2 LIMIT 1;
|
||||
f1 f2 f3
|
||||
@ -5265,7 +5265,7 @@ EXPLAIN
|
||||
SELECT a FROM t1,t2 WHERE t2.v = t1.v ;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where
|
||||
1 SIMPLE t2 ref idx idx 4 test.t1.v 2
|
||||
1 SIMPLE t2 ref idx idx 4 test.t1.v 1
|
||||
SELECT a FROM t1,t2 WHERE t2.v = t1.v ;
|
||||
a
|
||||
11
|
||||
@ -5323,7 +5323,7 @@ EXPLAIN
|
||||
SELECT * FROM t1 WHERE (t1.b) IN (SELECT c FROM t2);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where
|
||||
1 PRIMARY t2 ref c c 5 test.t1.b 2 Using index; Start temporary; End temporary
|
||||
1 PRIMARY t2 ref c c 5 test.t1.b 1 Using index; Start temporary; End temporary
|
||||
SELECT * FROM t1 WHERE (t1.b) IN (SELECT c FROM t2);
|
||||
a b
|
||||
3914 17
|
||||
@ -5503,7 +5503,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 system NULL NULL NULL NULL 1
|
||||
1 PRIMARY t3 system NULL NULL NULL NULL 1
|
||||
1 PRIMARY t2 range a,c a 5 NULL 2 Using index condition; Using where; Using filesort
|
||||
1 PRIMARY t4 ref c c 5 test.t2.c 2 Using where; Start temporary; End temporary
|
||||
1 PRIMARY t4 ref c c 5 test.t2.c 1 Using where; Start temporary; End temporary
|
||||
SELECT * FROM t1,t2
|
||||
WHERE t2.c IN (SELECT c FROM t3,t4 WHERE t4.a < 10) AND
|
||||
t2.a BETWEEN 4 and 5
|
||||
@ -5521,7 +5521,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 system NULL NULL NULL NULL 1 Using temporary; Using filesort
|
||||
1 PRIMARY t3 system NULL NULL NULL NULL 1
|
||||
1 PRIMARY t2 range a,c a 5 NULL 2 Using index condition; Using where
|
||||
1 PRIMARY t4 ref c c 5 test.t2.c 2 Using where; Start temporary; End temporary
|
||||
1 PRIMARY t4 ref c c 5 test.t2.c 1 Using where; Start temporary; End temporary
|
||||
SELECT * FROM t1,t2
|
||||
WHERE t2.c IN (SELECT c FROM t3,t4 WHERE t4.a < 10) AND
|
||||
t2.a BETWEEN 4 and 5
|
||||
@ -5540,7 +5540,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 system NULL NULL NULL NULL 1 Using temporary; Using filesort
|
||||
1 PRIMARY t3 system NULL NULL NULL NULL 1
|
||||
1 PRIMARY t2 range a,c a 5 NULL 2 Using index condition; Using where
|
||||
1 PRIMARY t4 ref c c 5 test.t2.c 2 Using where; Start temporary; End temporary
|
||||
1 PRIMARY t4 ref c c 5 test.t2.c 1 Using where; Start temporary; End temporary
|
||||
SELECT * FROM t1,t2
|
||||
WHERE t2.c IN (SELECT c FROM t3,t4 WHERE t4.a < 10) AND
|
||||
t2.a BETWEEN 4 and 5
|
||||
@ -5583,7 +5583,7 @@ and t2.uid=t1.fid;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t3 ref uid uid 5 const 4 Using where; Start temporary
|
||||
1 PRIMARY t4 eq_ref PRIMARY PRIMARY 4 test.t3.fid 1 Using index
|
||||
1 PRIMARY t1 ref uid uid 5 test.t3.fid 2 Using where; End temporary; Using join buffer (flat, BKAH join); Rowid-ordered scan
|
||||
1 PRIMARY t1 ref uid uid 5 test.t3.fid 1 Using where; End temporary; Using join buffer (flat, BKAH join); Rowid-ordered scan
|
||||
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t1.fid 1 Using join buffer (flat, BKAH join); Rowid-ordered scan
|
||||
select name from t2, t1
|
||||
where t1.uid in (select t4.uid from t4, t3 where t3.uid=1 and t4.uid=t3.fid)
|
||||
|
||||
@ -855,7 +855,7 @@ ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b AND t2.a>0;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 2 100.00 Using where
|
||||
1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 1 100.00 Using where
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t3`.`b` and `test`.`t2`.`b` = `test`.`t3`.`b` and `test`.`t2`.`a` > 0 and `test`.`t3`.`b` is not null) where 1
|
||||
@ -969,10 +969,10 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t8 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 8 100.00 Using where
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 1 100.00 Using where
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`a` > 0 and `test`.`t4`.`a` > 0 and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`a` > 0)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t4`.`b` = `test`.`t3`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null)
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`a` > 0 and `test`.`t4`.`a` > 0 and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`a` > 0)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t3`.`b` = `test`.`t4`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null)
|
||||
INSERT INTO t8 VALUES (-3,12,0), (-1,14,0), (-5,15,0), (-1,11,0), (-4,13,0);
|
||||
CREATE INDEX idx_b ON t8(b);
|
||||
EXPLAIN EXTENDED
|
||||
@ -1017,12 +1017,12 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t5 ALL idx_b NULL NULL NULL 7 100.00 Using where
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where
|
||||
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 1 100.00 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 8 100.00 Using where
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 1 100.00 Using where
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`a` > 0 and `test`.`t4`.`a` > 0 and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t8`.`a` >= 0 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`a` > 0)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t4`.`b` = `test`.`t3`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null)
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`a` > 0 and `test`.`t4`.`a` > 0 and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t8`.`a` >= 0 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`a` > 0)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t3`.`b` = `test`.`t4`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null)
|
||||
INSERT INTO t1 VALUES (-1,133,0), (-2,12,0), (-3,11,0), (-5,15,0);
|
||||
CREATE INDEX idx_b ON t1(b);
|
||||
CREATE INDEX idx_a ON t0(a);
|
||||
@ -1063,17 +1063,17 @@ t0.b=t1.b AND
|
||||
(t9.a=1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t0 ref idx_a idx_a 5 const 2 100.00 Using where
|
||||
1 SIMPLE t1 ref idx_b idx_b 5 test.t0.b 2 100.00
|
||||
1 SIMPLE t1 ref idx_b idx_b 5 test.t0.b 1 100.00
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t5 ALL idx_b NULL NULL NULL 7 100.00 Using where
|
||||
1 SIMPLE t7 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where
|
||||
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 1 100.00 Using where
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 8 100.00 Using where
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 1 100.00 Using where
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2 and `test`.`t1`.`a` > 0) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t4`.`b` = `test`.`t3`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null)
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2 and `test`.`t1`.`a` > 0) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t3`.`b` = `test`.`t4`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null)
|
||||
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
|
||||
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b
|
||||
FROM t0,t1
|
||||
@ -1210,12 +1210,12 @@ EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON c < 3 and b = c;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 index NULL a 5 NULL 21 Using index
|
||||
1 SIMPLE t2 range b b 5 NULL 3 Using where; Using index
|
||||
1 SIMPLE t3 ref c c 5 test.t2.b 2 Using index
|
||||
1 SIMPLE t3 ref c c 5 test.t2.b 1 Using index
|
||||
EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 index NULL a 5 NULL 21 Using index
|
||||
1 SIMPLE t2 range b b 5 NULL 3 Using where; Using index
|
||||
1 SIMPLE t3 ref c c 5 test.t2.b 2 Using index
|
||||
1 SIMPLE t3 ref c c 5 test.t2.b 1 Using index
|
||||
SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c;
|
||||
a b c
|
||||
NULL 0 0
|
||||
|
||||
@ -864,7 +864,7 @@ ON t3.a=1 AND t3.b=t2.b AND t2.b=t4.b AND t2.a>0;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 2 100.00 Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 2 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t2 ref idx_b idx_b 5 test.t3.b 1 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using join buffer (incremental, BNL join)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b` from `test`.`t3` join `test`.`t4` left join (`test`.`t1` join `test`.`t2`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t3`.`b` and `test`.`t2`.`b` = `test`.`t3`.`b` and `test`.`t2`.`a` > 0 and `test`.`t3`.`b` is not null) where 1
|
||||
@ -978,10 +978,10 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t8 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 8 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 1 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`a` > 0 and `test`.`t4`.`a` > 0 and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`a` > 0 and `test`.`t5`.`b` is not null)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t4`.`b` = `test`.`t3`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null)
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`a` > 0 and `test`.`t4`.`a` > 0 and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`a` > 0 and `test`.`t5`.`b` is not null)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t3`.`b` = `test`.`t4`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null)
|
||||
INSERT INTO t8 VALUES (-3,12,0), (-1,14,0), (-5,15,0), (-1,11,0), (-4,13,0);
|
||||
CREATE INDEX idx_b ON t8(b);
|
||||
EXPLAIN EXTENDED
|
||||
@ -1026,12 +1026,12 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t5 ALL idx_b NULL NULL NULL 7 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t7 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 1 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 8 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 1 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`a` > 0 and `test`.`t4`.`a` > 0 and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t8`.`a` >= 0 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`a` > 0 and `test`.`t5`.`b` is not null)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t4`.`b` = `test`.`t3`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null)
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`a` > 0 and `test`.`t4`.`a` > 0 and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t8`.`a` >= 0 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`a` > 0 and `test`.`t5`.`b` is not null)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t3`.`b` = `test`.`t4`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null)
|
||||
INSERT INTO t1 VALUES (-1,133,0), (-2,12,0), (-3,11,0), (-5,15,0);
|
||||
CREATE INDEX idx_b ON t1(b);
|
||||
CREATE INDEX idx_a ON t0(a);
|
||||
@ -1072,17 +1072,17 @@ t0.b=t1.b AND
|
||||
(t9.a=1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t0 ref idx_a idx_a 5 const 2 100.00 Using where
|
||||
1 SIMPLE t1 ref idx_b idx_b 5 test.t0.b 2 100.00 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t1 ref idx_b idx_b 5 test.t0.b 1 100.00 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t9 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t5 ALL idx_b NULL NULL NULL 7 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t7 hash_ALL NULL #hash#$hj 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BNLH join)
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 2 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t8 ref idx_b idx_b 5 test.t5.b 1 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 8 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 1 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t4 ref idx_b idx_b 5 test.t2.b 2 100.00 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`b` is not null)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2 and `test`.`t1`.`a` > 0) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t4`.`b` = `test`.`t3`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null)
|
||||
Note 1003 select `test`.`t0`.`a` AS `a`,`test`.`t0`.`b` AS `b`,`test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t4`.`a` AS `a`,`test`.`t4`.`b` AS `b`,`test`.`t5`.`a` AS `a`,`test`.`t5`.`b` AS `b`,`test`.`t6`.`a` AS `a`,`test`.`t6`.`b` AS `b`,`test`.`t7`.`a` AS `a`,`test`.`t7`.`b` AS `b`,`test`.`t8`.`a` AS `a`,`test`.`t8`.`b` AS `b`,`test`.`t9`.`a` AS `a`,`test`.`t9`.`b` AS `b` from `test`.`t0` join `test`.`t1` left join (`test`.`t2` left join (`test`.`t3` join `test`.`t4`) on(`test`.`t3`.`a` = 1 and `test`.`t4`.`b` = `test`.`t2`.`b` and `test`.`t2`.`b` is not null) join `test`.`t5` left join (`test`.`t6` join `test`.`t7` left join `test`.`t8` on(`test`.`t8`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` < 10 and `test`.`t5`.`b` is not null)) on(`test`.`t7`.`b` = `test`.`t5`.`b` and `test`.`t6`.`b` >= 2 and `test`.`t5`.`b` is not null)) on((`test`.`t3`.`b` = 2 or `test`.`t3`.`c` is null) and (`test`.`t6`.`b` = 2 or `test`.`t6`.`c` is null) and (`test`.`t5`.`b` = `test`.`t0`.`b` or `test`.`t3`.`c` is null or `test`.`t6`.`c` is null or `test`.`t8`.`c` is null) and `test`.`t1`.`a` <> 2 and `test`.`t1`.`a` > 0) join `test`.`t9` where `test`.`t0`.`a` = 1 and `test`.`t1`.`b` = `test`.`t0`.`b` and `test`.`t9`.`a` = 1 and (`test`.`t2`.`a` >= 4 or `test`.`t2`.`c` is null) and (`test`.`t3`.`a` < 5 or `test`.`t3`.`c` is null) and (`test`.`t3`.`b` = `test`.`t4`.`b` or `test`.`t3`.`c` is null or `test`.`t4`.`c` is null) and (`test`.`t5`.`a` >= 2 or `test`.`t5`.`c` is null) and (`test`.`t6`.`a` >= 4 or `test`.`t6`.`c` is null) and (`test`.`t7`.`a` <= 2 or `test`.`t7`.`c` is null) and (`test`.`t8`.`a` < 1 or `test`.`t8`.`c` is null) and (`test`.`t8`.`b` = `test`.`t9`.`b` or `test`.`t8`.`c` is null)
|
||||
SELECT t0.a,t0.b,t1.a,t1.b,t2.a,t2.b,t3.a,t3.b,t4.a,t4.b,
|
||||
t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b,t9.a,t9.b
|
||||
FROM t0,t1
|
||||
@ -1219,12 +1219,12 @@ EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON c < 3 and b = c;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 index NULL a 5 NULL 21 Using index
|
||||
1 SIMPLE t2 range b b 5 NULL 3 Using where; Using index
|
||||
1 SIMPLE t3 ref c c 5 test.t2.b 2 Using index
|
||||
1 SIMPLE t3 ref c c 5 test.t2.b 1 Using index
|
||||
EXPLAIN SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 index NULL a 5 NULL 21 Using index
|
||||
1 SIMPLE t2 range b b 5 NULL 3 Using where; Using index
|
||||
1 SIMPLE t3 ref c c 5 test.t2.b 2 Using index
|
||||
1 SIMPLE t3 ref c c 5 test.t2.b 1 Using index
|
||||
SELECT a, b, c FROM t1 LEFT JOIN (t2, t3) ON b < 3 and b = c;
|
||||
a b c
|
||||
NULL 0 0
|
||||
@ -2085,9 +2085,9 @@ ON t6.b >= 2 AND t5.b=t7.b AND
|
||||
(t8.a > 0 OR t8.c IS NULL) AND t6.a>0 AND t7.a>0;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 3
|
||||
1 SIMPLE t7 ref|filter PRIMARY,b_i b_i|PRIMARY 5|4 test.t5.b 2 (29%) Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan; Using rowid filter
|
||||
1 SIMPLE t7 ref|filter PRIMARY,b_i b_i|PRIMARY 5|4 test.t5.b 1 (29%) Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan; Using rowid filter
|
||||
1 SIMPLE t6 range|filter PRIMARY,b_i PRIMARY|b_i 4|5 NULL 3 (86%) Using where; Rowid-ordered scan; Using join buffer (incremental, BNL join); Using rowid filter
|
||||
1 SIMPLE t8 ref b_i b_i 5 test.t5.b 2 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t8 ref b_i b_i 5 test.t5.b 1 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
|
||||
FROM t5
|
||||
LEFT JOIN
|
||||
@ -2122,7 +2122,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 const PRIMARY PRIMARY 4 const 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t8 ref b_i b_i 5 test.t5.b 2 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t8 ref b_i b_i 5 test.t5.b 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
|
||||
FROM t5 LEFT JOIN
|
||||
(t6 LEFT JOIN t7 ON t7.a=1, t8)
|
||||
@ -2139,7 +2139,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t7 ref b_i b_i 5 const 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t8 ref b_i b_i 5 test.t5.b 2 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t8 ref b_i b_i 5 test.t5.b 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
|
||||
FROM t5 LEFT JOIN
|
||||
(t6 LEFT JOIN t7 ON t7.b=2, t8)
|
||||
@ -2154,9 +2154,9 @@ FROM t5 LEFT JOIN
|
||||
ON (t5.b=t8.b);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t5 ALL NULL NULL NULL NULL 2
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t8 ref b_i b_i 5 test.t5.b 1 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t6 ALL NULL NULL NULL NULL 1 Using join buffer (incremental, BNL join)
|
||||
1 SIMPLE t7 const PRIMARY PRIMARY 4 const 1 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t8 ref b_i b_i 5 test.t5.b 2 Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
SELECT t5.a,t5.b,t6.a,t6.b,t7.a,t7.b,t8.a,t8.b
|
||||
FROM t5 LEFT JOIN
|
||||
(t8, t6 LEFT JOIN t7 ON t7.a=1)
|
||||
|
||||
@ -1230,7 +1230,7 @@ EXPLAIN
|
||||
SELECT t1.id, a FROM t1 LEFT JOIN t2 ON t1.id=t2.id WHERE t2.b IS NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref idx idx 4 test.t1.id 2 Using where; Not exists
|
||||
1 SIMPLE t2 ref idx idx 4 test.t1.id 1 Using where; Not exists
|
||||
flush status;
|
||||
SELECT t1.id, a FROM t1 LEFT JOIN t2 ON t1.id=t2.id WHERE t2.b IS NULL;
|
||||
id a
|
||||
@ -2080,7 +2080,7 @@ WHERE t1.pk BETWEEN 5 AND 6 AND t1.b IS NULL OR t1.b = 5
|
||||
ORDER BY t1.b;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t1 ref idx idx 4 const 2 100.00 Using where
|
||||
1 SIMPLE t2 ref c c 5 test.t1.a 2 100.00
|
||||
1 SIMPLE t2 ref c c 5 test.t1.a 1 100.00
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2` join `test`.`t1` where `test`.`t2`.`c` = `test`.`t1`.`a` and `test`.`t1`.`b` = 5 order by `test`.`t1`.`b`
|
||||
SELECT t1.b, t2.c, t2.d FROM t2 JOIN t1 ON t2.c = t1.a
|
||||
@ -2097,7 +2097,7 @@ WHERE t1.pk BETWEEN 5 AND 6 AND t1.b IS NULL OR t1.b = 5
|
||||
ORDER BY t1.b;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t1 ref PRIMARY,idx idx 4 const 2 100.00 Using where
|
||||
1 SIMPLE t2 ref c c 5 test.t1.a 2 100.00
|
||||
1 SIMPLE t2 ref c c 5 test.t1.a 1 100.00
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2` join `test`.`t1` where `test`.`t2`.`c` = `test`.`t1`.`a` and `test`.`t1`.`b` = 5 order by `test`.`t1`.`b`
|
||||
SELECT t1.b, t2.c, t2.d FROM t2 LEFT JOIN t1 ON t2.c = t1.a
|
||||
|
||||
@ -448,9 +448,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t12 eq_ref PRIMARY PRIMARY 4 test.t11.k3 1 Using where
|
||||
1 SIMPLE l2 eq_ref PRIMARY PRIMARY 4 test.t11.k4 1 Using where
|
||||
1 SIMPLE t9 ref PRIMARY PRIMARY 1 test.t1.a4 1
|
||||
1 SIMPLE t13 ref PRIMARY,m3 m3 8 const,test.t1.a1 1 Using index
|
||||
1 SIMPLE t13 ref PRIMARY,m3 PRIMARY 4 test.t1.a1 1 Using where
|
||||
1 SIMPLE l4 eq_ref PRIMARY PRIMARY 4 test.t13.m2 1 Using where
|
||||
1 SIMPLE m2 ref PRIMARY,m3 m3 8 const,test.t1.a1 1 Using index
|
||||
1 SIMPLE m2 ref PRIMARY,m3 PRIMARY 4 test.t1.a1 1 Using where
|
||||
1 SIMPLE l3 eq_ref PRIMARY PRIMARY 4 test.m2.m2 1 Using where
|
||||
1 SIMPLE t14 eq_ref PRIMARY PRIMARY 2 test.t1.a8 1 Using where
|
||||
1 SIMPLE t15 eq_ref PRIMARY PRIMARY 2 test.t1.a9 1 Using where
|
||||
@ -471,9 +471,9 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t12 eq_ref PRIMARY PRIMARY 4 test.t11.k3 1 Using where
|
||||
1 SIMPLE l2 eq_ref PRIMARY PRIMARY 4 test.t11.k4 1 Using where
|
||||
1 SIMPLE t9 ref PRIMARY PRIMARY 1 test.t1.a4 1
|
||||
1 SIMPLE t13 ref PRIMARY,m3 m3 8 const,test.t1.a1 1 Using index
|
||||
1 SIMPLE t13 ref PRIMARY,m3 PRIMARY 4 test.t1.a1 1 Using where
|
||||
1 SIMPLE l4 eq_ref PRIMARY PRIMARY 4 test.t13.m2 1 Using where
|
||||
1 SIMPLE m2 ref PRIMARY,m3 m3 8 const,test.t1.a1 1 Using index
|
||||
1 SIMPLE m2 ref PRIMARY,m3 PRIMARY 4 test.t1.a1 1 Using where
|
||||
1 SIMPLE l3 eq_ref PRIMARY PRIMARY 4 test.m2.m2 1 Using where
|
||||
1 SIMPLE t14 eq_ref PRIMARY PRIMARY 2 test.t1.a8 1 Using where
|
||||
1 SIMPLE t15 eq_ref PRIMARY PRIMARY 2 test.t1.a9 1 Using where
|
||||
|
||||
@ -1237,7 +1237,7 @@ EXPLAIN
|
||||
SELECT t1.id, a FROM t1 LEFT JOIN t2 ON t1.id=t2.id WHERE t2.b IS NULL;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref idx idx 4 test.t1.id 2 Using where; Not exists; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t2 ref idx idx 4 test.t1.id 1 Using where; Not exists; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
flush status;
|
||||
SELECT t1.id, a FROM t1 LEFT JOIN t2 ON t1.id=t2.id WHERE t2.b IS NULL;
|
||||
id a
|
||||
@ -2087,7 +2087,7 @@ WHERE t1.pk BETWEEN 5 AND 6 AND t1.b IS NULL OR t1.b = 5
|
||||
ORDER BY t1.b;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t1 ref idx idx 4 const 2 100.00 Using where
|
||||
1 SIMPLE t2 ref c c 5 test.t1.a 2 100.00 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t2 ref c c 5 test.t1.a 1 100.00 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2` join `test`.`t1` where `test`.`t2`.`c` = `test`.`t1`.`a` and `test`.`t1`.`b` = 5 order by `test`.`t1`.`b`
|
||||
SELECT t1.b, t2.c, t2.d FROM t2 JOIN t1 ON t2.c = t1.a
|
||||
@ -2104,7 +2104,7 @@ WHERE t1.pk BETWEEN 5 AND 6 AND t1.b IS NULL OR t1.b = 5
|
||||
ORDER BY t1.b;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t1 ref PRIMARY,idx idx 4 const 2 100.00 Using where
|
||||
1 SIMPLE t2 ref c c 5 test.t1.a 2 100.00 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t2 ref c c 5 test.t1.a 1 100.00 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t2` join `test`.`t1` where `test`.`t2`.`c` = `test`.`t1`.`a` and `test`.`t1`.`b` = 5 order by `test`.`t1`.`b`
|
||||
SELECT t1.b, t2.c, t2.d FROM t2 LEFT JOIN t1 ON t2.c = t1.a
|
||||
|
||||
@ -134,7 +134,7 @@ i
|
||||
explain select count(*) from t1, t2 where t1.p = t2.i;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 2 Using index
|
||||
1 SIMPLE t2 ref k1 k1 5 test.t1.p 2 Using index
|
||||
1 SIMPLE t2 ref k1 k1 5 test.t1.p 1 Using index
|
||||
select count(*) from t1, t2 where t1.p = t2.i;
|
||||
count(*)
|
||||
3
|
||||
|
||||
@ -36,7 +36,7 @@ a a a a
|
||||
explain select t1.*,t2.* from t1,t1 as t2 where t1.A=t2.B;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL a NULL NULL NULL 5
|
||||
1 SIMPLE t2 ALL b NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
|
||||
1 SIMPLE t2 ref b b 4 test.t1.a 1 Using index condition
|
||||
select t1.*,t2.* from t1,t1 as t2 where t1.A=t2.B order by binary t1.a,t2.a;
|
||||
a b a b
|
||||
A B a a
|
||||
|
||||
@ -2442,13 +2442,13 @@ INSERT INTO t2 VALUES(1,1),(2,2);
|
||||
EXPLAIN UPDATE t1 SET t1.f2=(SELECT MAX(t2.f4) FROM t2 WHERE t2.f3=t1.f1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
|
||||
2 DEPENDENT SUBQUERY t2 ref IDX IDX 5 test.t1.f1 2
|
||||
2 DEPENDENT SUBQUERY t2 ref IDX IDX 5 test.t1.f1 1
|
||||
FLUSH STATUS;
|
||||
FLUSH TABLES;
|
||||
EXPLAIN EXTENDED UPDATE t1 SET t1.f2=(SELECT MAX(t2.f4) FROM t2 WHERE t2.f3=t1.f1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
|
||||
2 DEPENDENT SUBQUERY t2 ref IDX IDX 5 test.t1.f1 2 100.00
|
||||
2 DEPENDENT SUBQUERY t2 ref IDX IDX 5 test.t1.f1 1 100.00
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t1.f1' of SELECT #2 was resolved in SELECT #1
|
||||
# Status of EXPLAIN EXTENDED query
|
||||
@ -2459,7 +2459,7 @@ FLUSH TABLES;
|
||||
EXPLAIN EXTENDED SELECT (SELECT MAX(t2.f4) FROM t2 WHERE t2.f3=t1.f1) FROM t1;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
|
||||
2 DEPENDENT SUBQUERY t2 ref IDX IDX 5 test.t1.f1 2 100.00
|
||||
2 DEPENDENT SUBQUERY t2 ref IDX IDX 5 test.t1.f1 1 100.00
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t1.f1' of SELECT #2 was resolved in SELECT #1
|
||||
Note 1003 /* select#1 */ select <expr_cache><`test`.`t1`.`f1`>((/* select#2 */ select max(`test`.`t2`.`f4`) from `test`.`t2` where `test`.`t2`.`f3` = `test`.`t1`.`f1`)) AS `(SELECT MAX(t2.f4) FROM t2 WHERE t2.f3=t1.f1)` from `test`.`t1`
|
||||
|
||||
@ -181,12 +181,12 @@ insert into t2 values (7),(8);
|
||||
explain select * from t2 straight_join t1 where t1.a=t2.a and b is null;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where
|
||||
1 SIMPLE t1 ref a,b a 10 test.t2.a,const 2 Using where; Using index
|
||||
1 SIMPLE t1 ref a,b a 10 test.t2.a,const 1 Using where; Using index
|
||||
drop index b on t1;
|
||||
explain select * from t2,t1 where t1.a=t2.a and b is null;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 2 Using where
|
||||
1 SIMPLE t1 ref a a 10 test.t2.a,const 2 Using where; Using index
|
||||
1 SIMPLE t1 ref a a 10 test.t2.a,const 1 Using where; Using index
|
||||
select * from t2,t1 where t1.a=t2.a and b is null;
|
||||
a a b
|
||||
7 7 NULL
|
||||
|
||||
@ -1218,7 +1218,7 @@ explain select * from t1,t2 where t1.a=t2.b+2 and t2.a= t1.b {
|
||||
"used_range_estimates": false,
|
||||
"reason": "not available",
|
||||
"rows": 1,
|
||||
"cost": 0.1731074,
|
||||
"cost": 0.1821659,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -1235,7 +1235,7 @@ explain select * from t1,t2 where t1.a=t2.b+2 and t2.a= t1.b {
|
||||
"type": "ref",
|
||||
"rows_read": 1,
|
||||
"rows_out": 1,
|
||||
"cost": 0.1731074,
|
||||
"cost": 0.1821659,
|
||||
"uses_join_buffering": false
|
||||
}
|
||||
}
|
||||
@ -1246,7 +1246,7 @@ explain select * from t1,t2 where t1.a=t2.b+2 and t2.a= t1.b {
|
||||
"plan_prefix": "t1",
|
||||
"table": "t2",
|
||||
"rows_for_plan": 100,
|
||||
"cost_for_plan": 0.1987835
|
||||
"cost_for_plan": 0.207842
|
||||
}
|
||||
]
|
||||
},
|
||||
@ -1272,7 +1272,7 @@ explain select * from t1,t2 where t1.a=t2.b+2 and t2.a= t1.b {
|
||||
"used_range_estimates": false,
|
||||
"reason": "not available",
|
||||
"rows": 1,
|
||||
"cost": 0.1731074,
|
||||
"cost": 0.1821659,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -1289,7 +1289,7 @@ explain select * from t1,t2 where t1.a=t2.b+2 and t2.a= t1.b {
|
||||
"type": "ref",
|
||||
"rows_read": 1,
|
||||
"rows_out": 1,
|
||||
"cost": 0.1731074,
|
||||
"cost": 0.1821659,
|
||||
"uses_join_buffering": false
|
||||
}
|
||||
}
|
||||
@ -1300,10 +1300,10 @@ explain select * from t1,t2 where t1.a=t2.b+2 and t2.a= t1.b {
|
||||
"plan_prefix": "t2",
|
||||
"table": "t1",
|
||||
"rows_for_plan": 100,
|
||||
"cost_for_plan": 0.1987835,
|
||||
"cost_for_plan": 0.207842,
|
||||
"pruned_by_cost": true,
|
||||
"current_cost": 0.1987835,
|
||||
"best_cost": 0.1987835
|
||||
"current_cost": 0.207842,
|
||||
"best_cost": 0.207842
|
||||
}
|
||||
]
|
||||
}
|
||||
@ -1312,7 +1312,7 @@ explain select * from t1,t2 where t1.a=t2.b+2 and t2.a= t1.b {
|
||||
{
|
||||
"best_join_order": ["t1", "t2"],
|
||||
"rows": 100,
|
||||
"cost": 0.1987835
|
||||
"cost": 0.207842
|
||||
},
|
||||
{
|
||||
"substitute_best_equal": {
|
||||
@ -1760,7 +1760,7 @@ set statement optimizer_scan_setup_cost=0 for EXPLAIN SELECT MIN(d) FROM t1 wher
|
||||
"direction": 1,
|
||||
"rows_to_examine": 7,
|
||||
"range_scan": false,
|
||||
"scan_cost": 0.001667847,
|
||||
"scan_cost": 0.001758432,
|
||||
"chosen": true
|
||||
}
|
||||
]
|
||||
@ -2338,7 +2338,7 @@ explain select * from t1 where a=1 and b=2 order by c limit 1 {
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 180,
|
||||
"cost": 0.223346519,
|
||||
"cost": 0.223677504,
|
||||
"chosen": false,
|
||||
"cause": "cost"
|
||||
},
|
||||
@ -2349,7 +2349,7 @@ explain select * from t1 where a=1 and b=2 order by c limit 1 {
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 41,
|
||||
"cost": 0.051838728,
|
||||
"cost": 0.051929313,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -2370,7 +2370,7 @@ explain select * from t1 where a=1 and b=2 order by c limit 1 {
|
||||
"ranges": ["(1,2) <= (a,b) <= (1,2)"]
|
||||
},
|
||||
"rows_for_plan": 41,
|
||||
"cost_for_plan": 0.051838728,
|
||||
"cost_for_plan": 0.051929313,
|
||||
"chosen": true
|
||||
}
|
||||
}
|
||||
@ -2430,7 +2430,7 @@ explain select * from t1 where a=1 and b=2 order by c limit 1 {
|
||||
"index": "a_c",
|
||||
"used_range_estimates": true,
|
||||
"rows": 180,
|
||||
"cost": 0.222796377,
|
||||
"cost": 0.222922562,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -2438,7 +2438,7 @@ explain select * from t1 where a=1 and b=2 order by c limit 1 {
|
||||
"index": "a_b",
|
||||
"used_range_estimates": true,
|
||||
"rows": 41,
|
||||
"cost": 0.051288586,
|
||||
"cost": 0.051379171,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -2451,7 +2451,7 @@ explain select * from t1 where a=1 and b=2 order by c limit 1 {
|
||||
"type": "ref",
|
||||
"rows_read": 41,
|
||||
"rows_out": 41,
|
||||
"cost": 0.051288586,
|
||||
"cost": 0.051379171,
|
||||
"uses_join_buffering": false
|
||||
}
|
||||
}
|
||||
@ -2462,14 +2462,14 @@ explain select * from t1 where a=1 and b=2 order by c limit 1 {
|
||||
"plan_prefix": "",
|
||||
"table": "t1",
|
||||
"rows_for_plan": 41,
|
||||
"cost_for_plan": 0.051288586
|
||||
"cost_for_plan": 0.051379171
|
||||
}
|
||||
]
|
||||
},
|
||||
{
|
||||
"best_join_order": ["t1"],
|
||||
"rows": 41,
|
||||
"cost": 0.051288586
|
||||
"cost": 0.051379171
|
||||
},
|
||||
{
|
||||
"substitute_best_equal": {
|
||||
@ -2497,7 +2497,7 @@ explain select * from t1 where a=1 and b=2 order by c limit 1 {
|
||||
"table": "t1",
|
||||
"rows_estimation": 41,
|
||||
"filesort_cost": 9.387121e-4,
|
||||
"read_cost": 0.052227298,
|
||||
"read_cost": 0.052317883,
|
||||
"filesort_type": "priority_queue with addon fields",
|
||||
"fanout": 1,
|
||||
"possible_keys": [
|
||||
@ -2507,7 +2507,7 @@ explain select * from t1 where a=1 and b=2 order by c limit 1 {
|
||||
"direction": 1,
|
||||
"rows_to_examine": 24,
|
||||
"range_scan": false,
|
||||
"scan_cost": 0.030312813,
|
||||
"scan_cost": 0.030403398,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -2516,7 +2516,7 @@ explain select * from t1 where a=1 and b=2 order by c limit 1 {
|
||||
"direction": 1,
|
||||
"rows_to_examine": 4.390243902,
|
||||
"range_scan": true,
|
||||
"scan_cost": 0.023380552,
|
||||
"scan_cost": 0.023415994,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -2557,8 +2557,8 @@ explain select * from t1 where a=1 and b=2 order by c limit 1 {
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 180,
|
||||
"cost": 0.223346519,
|
||||
"cost_with_limit": 0.002483968,
|
||||
"cost": 0.223677504,
|
||||
"cost_with_limit": 0.002574553,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -2579,7 +2579,7 @@ explain select * from t1 where a=1 and b=2 order by c limit 1 {
|
||||
"ranges": ["(1) <= (a) <= (1)"]
|
||||
},
|
||||
"rows_for_plan": 180,
|
||||
"cost_for_plan": 0.223346519,
|
||||
"cost_for_plan": 0.223677504,
|
||||
"chosen": true
|
||||
}
|
||||
}
|
||||
@ -3752,7 +3752,7 @@ explain select * from t1 where pk = 2 and a=5 and b=1 {
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 1,
|
||||
"cost": 0.002483968,
|
||||
"cost": 0.002574553,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -3762,7 +3762,7 @@ explain select * from t1 where pk = 2 and a=5 and b=1 {
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 1,
|
||||
"cost": 0.002483968,
|
||||
"cost": 0.002574553,
|
||||
"chosen": false,
|
||||
"cause": "cost"
|
||||
},
|
||||
@ -3773,7 +3773,7 @@ explain select * from t1 where pk = 2 and a=5 and b=1 {
|
||||
"using_mrr": false,
|
||||
"index_only": true,
|
||||
"rows": 1,
|
||||
"cost": 0.001388369,
|
||||
"cost": 0.001478954,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -3822,7 +3822,7 @@ explain select * from t1 where pk = 2 and a=5 and b=1 {
|
||||
"ranges": ["(2,5,1) <= (pk,a,b) <= (2,5,1)"]
|
||||
},
|
||||
"rows_for_plan": 1,
|
||||
"cost_for_plan": 0.001388369,
|
||||
"cost_for_plan": 0.001478954,
|
||||
"chosen": true
|
||||
}
|
||||
}
|
||||
@ -3887,7 +3887,7 @@ explain select * from t1 where pk = 2 and a=5 and b=1 {
|
||||
"index": "pk",
|
||||
"used_range_estimates": true,
|
||||
"rows": 1,
|
||||
"cost": 0.001933826,
|
||||
"cost": 0.002024411,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -3895,7 +3895,7 @@ explain select * from t1 where pk = 2 and a=5 and b=1 {
|
||||
"index": "pk_a",
|
||||
"used_range_estimates": true,
|
||||
"rows": 1,
|
||||
"cost": 0.001933826,
|
||||
"cost": 0.002024411,
|
||||
"chosen": false,
|
||||
"cause": "cost"
|
||||
},
|
||||
@ -3904,7 +3904,7 @@ explain select * from t1 where pk = 2 and a=5 and b=1 {
|
||||
"index": "pk_a_b",
|
||||
"used_range_estimates": true,
|
||||
"rows": 1,
|
||||
"cost": 0.000838227,
|
||||
"cost": 0.000928812,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -3917,7 +3917,7 @@ explain select * from t1 where pk = 2 and a=5 and b=1 {
|
||||
"type": "ref",
|
||||
"rows_read": 1,
|
||||
"rows_out": 1,
|
||||
"cost": 0.000838227,
|
||||
"cost": 0.000928812,
|
||||
"uses_join_buffering": false
|
||||
}
|
||||
}
|
||||
@ -3928,14 +3928,14 @@ explain select * from t1 where pk = 2 and a=5 and b=1 {
|
||||
"plan_prefix": "",
|
||||
"table": "t1",
|
||||
"rows_for_plan": 1,
|
||||
"cost_for_plan": 0.000838227
|
||||
"cost_for_plan": 0.000928812
|
||||
}
|
||||
]
|
||||
},
|
||||
{
|
||||
"best_join_order": ["t1"],
|
||||
"rows": 1,
|
||||
"cost": 0.000838227
|
||||
"cost": 0.000928812
|
||||
},
|
||||
{
|
||||
"substitute_best_equal": {
|
||||
@ -4309,7 +4309,7 @@ explain delete from t0 where t0.a<3 {
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 3,
|
||||
"cost": 0.004951706,
|
||||
"cost": 0.005042291,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -4327,7 +4327,7 @@ explain delete from t0 where t0.a<3 {
|
||||
"ranges": ["(NULL) < (a) < (3)"]
|
||||
},
|
||||
"rows_for_plan": 3,
|
||||
"cost_for_plan": 0.004951706,
|
||||
"cost_for_plan": 0.005042291,
|
||||
"chosen": true
|
||||
}
|
||||
}
|
||||
@ -4454,7 +4454,7 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 {
|
||||
"using_mrr": false,
|
||||
"index_only": true,
|
||||
"rows": 3,
|
||||
"cost": 0.001664909,
|
||||
"cost": 0.001755494,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -4475,7 +4475,7 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 {
|
||||
"ranges": ["(NULL) < (a) < (3)"]
|
||||
},
|
||||
"rows_for_plan": 3,
|
||||
"cost_for_plan": 0.001664909,
|
||||
"cost_for_plan": 0.001755494,
|
||||
"chosen": true
|
||||
}
|
||||
}
|
||||
@ -4519,7 +4519,7 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 {
|
||||
"using_mrr": false,
|
||||
"index_only": true,
|
||||
"rows": 3,
|
||||
"cost": 0.001664909,
|
||||
"cost": 0.001755494,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -4540,7 +4540,7 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 {
|
||||
"ranges": ["(NULL) < (a) < (3)"]
|
||||
},
|
||||
"rows_for_plan": 3,
|
||||
"cost_for_plan": 0.001664909,
|
||||
"cost_for_plan": 0.001755494,
|
||||
"chosen": true
|
||||
}
|
||||
}
|
||||
@ -4575,7 +4575,7 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 {
|
||||
"rows": 3,
|
||||
"rows_after_filter": 3,
|
||||
"rows_out": 3,
|
||||
"cost": 0.001664909,
|
||||
"cost": 0.001755494,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -4583,7 +4583,7 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 {
|
||||
"type": "range",
|
||||
"rows_read": 3,
|
||||
"rows_out": 3,
|
||||
"cost": 0.001664909,
|
||||
"cost": 0.001755494,
|
||||
"uses_join_buffering": false
|
||||
}
|
||||
}
|
||||
@ -4601,7 +4601,7 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 {
|
||||
"rows": 3,
|
||||
"rows_after_filter": 3,
|
||||
"rows_out": 3,
|
||||
"cost": 0.001664909,
|
||||
"cost": 0.001755494,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -4609,7 +4609,7 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 {
|
||||
"type": "range",
|
||||
"rows_read": 3,
|
||||
"rows_out": 3,
|
||||
"cost": 0.001664909,
|
||||
"cost": 0.001755494,
|
||||
"uses_join_buffering": false
|
||||
}
|
||||
}
|
||||
@ -4620,7 +4620,7 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 {
|
||||
"plan_prefix": "",
|
||||
"table": "t0",
|
||||
"rows_for_plan": 3,
|
||||
"cost_for_plan": 0.001664909,
|
||||
"cost_for_plan": 0.001755494,
|
||||
"rest_of_plan": [
|
||||
{
|
||||
"plan_prefix": "t0",
|
||||
@ -4638,7 +4638,7 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 {
|
||||
"used_range_estimates": false,
|
||||
"reason": "not better than ref estimates",
|
||||
"rows": 1,
|
||||
"cost": 0.002105081,
|
||||
"cost": 0.002376836,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -4651,7 +4651,7 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 {
|
||||
"type": "ref",
|
||||
"rows_read": 1,
|
||||
"rows_out": 1,
|
||||
"cost": 0.002105081,
|
||||
"cost": 0.002376836,
|
||||
"uses_join_buffering": false
|
||||
}
|
||||
}
|
||||
@ -4662,7 +4662,7 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 {
|
||||
"plan_prefix": "t0",
|
||||
"table": "t1",
|
||||
"rows_for_plan": 3,
|
||||
"cost_for_plan": 0.00376999
|
||||
"cost_for_plan": 0.00413233
|
||||
}
|
||||
]
|
||||
},
|
||||
@ -4670,7 +4670,7 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 {
|
||||
"plan_prefix": "",
|
||||
"table": "t1",
|
||||
"rows_for_plan": 3,
|
||||
"cost_for_plan": 0.001664909,
|
||||
"cost_for_plan": 0.001755494,
|
||||
"rest_of_plan": [
|
||||
{
|
||||
"plan_prefix": "t1",
|
||||
@ -4688,8 +4688,8 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 {
|
||||
"rec_per_key_stats_missing": true,
|
||||
"used_range_estimates": false,
|
||||
"reason": "not better than ref estimates",
|
||||
"rows": 2,
|
||||
"cost": 0.002519891,
|
||||
"rows": 1.166666667,
|
||||
"cost": 0.002392836,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -4700,9 +4700,9 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 {
|
||||
],
|
||||
"chosen_access_method": {
|
||||
"type": "ref",
|
||||
"rows_read": 2,
|
||||
"rows_out": 2,
|
||||
"cost": 0.002519891,
|
||||
"rows_read": 1.166666667,
|
||||
"rows_out": 1.166666667,
|
||||
"cost": 0.002392836,
|
||||
"uses_join_buffering": false
|
||||
}
|
||||
}
|
||||
@ -4712,11 +4712,11 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 {
|
||||
{
|
||||
"plan_prefix": "t1",
|
||||
"table": "t0",
|
||||
"rows_for_plan": 6,
|
||||
"cost_for_plan": 0.0041848,
|
||||
"rows_for_plan": 3.5,
|
||||
"cost_for_plan": 0.00414833,
|
||||
"pruned_by_cost": true,
|
||||
"current_cost": 0.0041848,
|
||||
"best_cost": 0.00376999
|
||||
"current_cost": 0.00414833,
|
||||
"best_cost": 0.00413233
|
||||
}
|
||||
]
|
||||
}
|
||||
@ -4725,7 +4725,7 @@ explain delete t0,t1 from t0, t1 where t0.a=t1.a and t1.a<3 {
|
||||
{
|
||||
"best_join_order": ["t0", "t1"],
|
||||
"rows": 3,
|
||||
"cost": 0.00376999
|
||||
"cost": 0.00413233
|
||||
},
|
||||
{
|
||||
"substitute_best_equal": {
|
||||
@ -10386,7 +10386,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": true,
|
||||
"rows": 1,
|
||||
"cost": 0.001388369,
|
||||
"cost": 0.001478954,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -10415,7 +10415,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": true,
|
||||
"rows": 107,
|
||||
"cost": 0.016044989,
|
||||
"cost": 0.016135574,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -10447,7 +10447,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 1000,
|
||||
"cost": 1.235599899,
|
||||
"cost": 1.235690484,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -10487,7 +10487,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 4,
|
||||
"cost": 0.006185575,
|
||||
"cost": 0.00627616,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -10521,7 +10521,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 1,
|
||||
"cost": 0.002483968,
|
||||
"cost": 0.002574553,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -10550,7 +10550,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 1,
|
||||
"cost": 0.002483968,
|
||||
"cost": 0.002574553,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -10587,7 +10587,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 1,
|
||||
"cost": 0.002483968,
|
||||
"cost": 0.002574553,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -10617,7 +10617,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 1,
|
||||
"cost": 0.002483968,
|
||||
"cost": 0.002574553,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -10647,7 +10647,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 1,
|
||||
"cost": 0.002483968,
|
||||
"cost": 0.002574553,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -10680,7 +10680,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 1,
|
||||
"cost": 0.002483968,
|
||||
"cost": 0.002574553,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -10716,7 +10716,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 1,
|
||||
"cost": 0.002483968,
|
||||
"cost": 0.002574553,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -10750,7 +10750,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 2,
|
||||
"cost": 0.003717837,
|
||||
"cost": 0.003808422,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -10774,7 +10774,7 @@ EXPLAIN
|
||||
{
|
||||
"query_block": {
|
||||
"select_id": 1,
|
||||
"cost": 1.235599899,
|
||||
"cost": 1.235690484,
|
||||
"nested_loop": [
|
||||
{
|
||||
"table": {
|
||||
@ -10786,7 +10786,7 @@ EXPLAIN
|
||||
"used_key_parts": ["start_date", "end_date"],
|
||||
"loops": 1,
|
||||
"rows": 1000,
|
||||
"cost": 1.235599899,
|
||||
"cost": 1.235690484,
|
||||
"filtered": 100,
|
||||
"index_condition": "t1.start_date >= '2019-02-10' and t1.end_date < '2019-04-01'"
|
||||
}
|
||||
@ -10808,7 +10808,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 1000,
|
||||
"cost": 1.235599899,
|
||||
"cost": 1.235690484,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -11086,7 +11086,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans'))
|
||||
"used_range_estimates": false,
|
||||
"reason": "not available",
|
||||
"rows": 1,
|
||||
"cost": 0.01810946,
|
||||
"cost": 0.01901531,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -11100,7 +11100,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans'))
|
||||
"type": "ref",
|
||||
"rows_read": 1,
|
||||
"rows_out": 1,
|
||||
"cost": 0.01810946,
|
||||
"cost": 0.01901531,
|
||||
"uses_join_buffering": false
|
||||
}
|
||||
}
|
||||
@ -11111,7 +11111,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans'))
|
||||
"plan_prefix": "A",
|
||||
"table": "B",
|
||||
"rows_for_plan": 10,
|
||||
"cost_for_plan": 0.02970911,
|
||||
"cost_for_plan": 0.03061496,
|
||||
"pushdown_cond_selectivity": 0.8,
|
||||
"filtered": 80,
|
||||
"rows_out": 0.8,
|
||||
@ -11127,7 +11127,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans'))
|
||||
"cost_for_plan": 0.1669214,
|
||||
"pruned_by_cost": true,
|
||||
"current_cost": 0.1669214,
|
||||
"best_cost": 0.02970911
|
||||
"best_cost": 0.03061496
|
||||
}
|
||||
]
|
||||
]
|
||||
@ -11156,7 +11156,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 1,
|
||||
"cost": 0.002483968,
|
||||
"cost": 0.002574553,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -11216,7 +11216,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.range_scan_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": true,
|
||||
"rows": 1,
|
||||
"cost": 0.001388369,
|
||||
"cost": 0.001478954,
|
||||
"chosen": true
|
||||
}
|
||||
]
|
||||
@ -11332,7 +11332,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans'))
|
||||
"used_range_estimates": false,
|
||||
"reason": "not available",
|
||||
"rows": 1,
|
||||
"cost": 0.01749506,
|
||||
"cost": 0.01840091,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -11346,7 +11346,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans'))
|
||||
"type": "ref",
|
||||
"rows_read": 1,
|
||||
"rows_out": 1,
|
||||
"cost": 0.01749506,
|
||||
"cost": 0.01840091,
|
||||
"uses_join_buffering": false
|
||||
}
|
||||
}
|
||||
@ -11357,7 +11357,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans'))
|
||||
"plan_prefix": "t1",
|
||||
"table": "t2",
|
||||
"rows_for_plan": 10,
|
||||
"cost_for_plan": 0.02909471,
|
||||
"cost_for_plan": 0.03000056,
|
||||
"cost_for_sorting": 0.006368384
|
||||
}
|
||||
]
|
||||
@ -11389,7 +11389,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans'))
|
||||
"used_range_estimates": false,
|
||||
"reason": "not available",
|
||||
"rows": 1,
|
||||
"cost": 0.1731074,
|
||||
"cost": 0.1821659,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -11421,7 +11421,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.considered_execution_plans'))
|
||||
"cost_for_plan": 0.13622835,
|
||||
"pruned_by_cost": true,
|
||||
"current_cost": 0.13622835,
|
||||
"best_cost": 0.035463094
|
||||
"best_cost": 0.036368944
|
||||
}
|
||||
]
|
||||
}
|
||||
@ -12003,7 +12003,7 @@ on t1.a=t.a
|
||||
where t1.b < 3;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 range idx_b idx_b 5 NULL 4 Using index condition; Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.a 2
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.a 1
|
||||
2 LATERAL DERIVED t2 ref idx_a idx_a 5 test.t1.a 1
|
||||
select
|
||||
json_detailed(json_extract(trace, '$**.choose_best_splitting'))
|
||||
@ -12035,7 +12035,7 @@ json_detailed(json_extract(trace, '$**.choose_best_splitting'))
|
||||
"used_range_estimates": false,
|
||||
"reason": "not available",
|
||||
"rows": 1.8367,
|
||||
"cost": 0.0019606,
|
||||
"cost": 0.002051185,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -12049,7 +12049,7 @@ json_detailed(json_extract(trace, '$**.choose_best_splitting'))
|
||||
"type": "ref",
|
||||
"rows_read": 1.8367,
|
||||
"rows_out": 1.8367,
|
||||
"cost": 0.0019606,
|
||||
"cost": 0.002051185,
|
||||
"uses_join_buffering": false
|
||||
}
|
||||
}
|
||||
@ -12060,7 +12060,7 @@ json_detailed(json_extract(trace, '$**.choose_best_splitting'))
|
||||
"plan_prefix": "",
|
||||
"table": "t2",
|
||||
"rows_for_plan": 1.8367,
|
||||
"cost_for_plan": 0.0019606,
|
||||
"cost_for_plan": 0.002051185,
|
||||
"cost_for_sorting": 0.001155201
|
||||
}
|
||||
]
|
||||
@ -12070,14 +12070,14 @@ json_detailed(json_extract(trace, '$**.choose_best_splitting'))
|
||||
{
|
||||
"table": "t2",
|
||||
"key": "idx_a",
|
||||
"org_cost": 0.0019606,
|
||||
"org_cost": 0.002051185,
|
||||
"postjoin_cost": 0.001135418,
|
||||
"one_splitting_cost": 0.003096018,
|
||||
"one_splitting_cost": 0.003186603,
|
||||
"unsplit_postjoin_cost": 0.036032575,
|
||||
"unsplit_cost": 0.060625425,
|
||||
"rows": 1.8367,
|
||||
"outer_rows": 4,
|
||||
"total_splitting_cost": 0.012384072,
|
||||
"total_splitting_cost": 0.012746412,
|
||||
"chosen": true
|
||||
}
|
||||
}
|
||||
@ -12235,7 +12235,7 @@ explain select * from t1 where a<10 and b between 10 and 50 and c < 10 {
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 9,
|
||||
"cost": 0.01235492,
|
||||
"cost": 0.012445505,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -12245,7 +12245,7 @@ explain select * from t1 where a<10 and b between 10 and 50 and c < 10 {
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 21,
|
||||
"cost": 0.027161348,
|
||||
"cost": 0.027251933,
|
||||
"chosen": false,
|
||||
"cause": "cost"
|
||||
}
|
||||
@ -12267,7 +12267,7 @@ explain select * from t1 where a<10 and b between 10 and 50 and c < 10 {
|
||||
"ranges": ["(NULL) < (a) < (10)"]
|
||||
},
|
||||
"rows_for_plan": 9,
|
||||
"cost_for_plan": 0.01235492,
|
||||
"cost_for_plan": 0.012445505,
|
||||
"chosen": true
|
||||
}
|
||||
}
|
||||
@ -12324,18 +12324,18 @@ explain select * from t1 where a<10 and b between 10 and 50 and c < 10 {
|
||||
{
|
||||
"filter": {
|
||||
"rowid_filter_index": "b",
|
||||
"index_only_cost": 0.001515222,
|
||||
"index_only_cost": 0.001605807,
|
||||
"filter_startup_cost": 3.004222e-4,
|
||||
"find_key_and_filter_lookup_cost": 7.827422e-4,
|
||||
"filter_selectivity": 0.021,
|
||||
"original_rows": 9,
|
||||
"new_rows": 0.189,
|
||||
"original_access_cost": 0.011516778,
|
||||
"with_filter_access_cost": 0.002507997,
|
||||
"original_access_cost": 0.011607363,
|
||||
"with_filter_access_cost": 0.002598582,
|
||||
"original_found_rows_cost": 0.010001556,
|
||||
"with_filter_found_rows_cost": 2.100327e-4,
|
||||
"org_cost": 0.011804778,
|
||||
"filter_cost": 0.002814467,
|
||||
"org_cost": 0.011895363,
|
||||
"filter_cost": 0.002905052,
|
||||
"filter_used": true
|
||||
},
|
||||
"access_type": "range",
|
||||
@ -12343,7 +12343,7 @@ explain select * from t1 where a<10 and b between 10 and 50 and c < 10 {
|
||||
"rows": 9,
|
||||
"rows_after_filter": 0.189,
|
||||
"rows_out": 0.017766,
|
||||
"cost": 0.002814467,
|
||||
"cost": 0.002905052,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -12351,7 +12351,7 @@ explain select * from t1 where a<10 and b between 10 and 50 and c < 10 {
|
||||
"type": "range",
|
||||
"rows_read": 0.189,
|
||||
"rows_out": 0.017766,
|
||||
"cost": 0.002814467,
|
||||
"cost": 0.002905052,
|
||||
"uses_join_buffering": false,
|
||||
"rowid_filter_index": "b"
|
||||
}
|
||||
@ -12363,7 +12363,7 @@ explain select * from t1 where a<10 and b between 10 and 50 and c < 10 {
|
||||
"plan_prefix": "",
|
||||
"table": "t1",
|
||||
"rows_for_plan": 0.017766,
|
||||
"cost_for_plan": 0.002814467,
|
||||
"cost_for_plan": 0.002905052,
|
||||
"pushdown_cond_selectivity": 0.094,
|
||||
"filtered": 0.1974,
|
||||
"rows_out": 0.017766
|
||||
@ -12373,7 +12373,7 @@ explain select * from t1 where a<10 and b between 10 and 50 and c < 10 {
|
||||
{
|
||||
"best_join_order": ["t1"],
|
||||
"rows": 0.017766,
|
||||
"cost": 0.002814467
|
||||
"cost": 0.002905052
|
||||
},
|
||||
{
|
||||
"table": "t1",
|
||||
@ -12400,7 +12400,7 @@ explain select * from t1 where a<10 and b between 10 and 50 and c < 10 {
|
||||
"using_mrr": false,
|
||||
"index_only": true,
|
||||
"rows": 21,
|
||||
"cost": 0.004153769,
|
||||
"cost": 0.004244354,
|
||||
"chosen": true
|
||||
}
|
||||
]
|
||||
@ -12413,7 +12413,7 @@ explain select * from t1 where a<10 and b between 10 and 50 and c < 10 {
|
||||
"ranges": ["(10) <= (b) <= (50)"]
|
||||
},
|
||||
"rows_for_plan": 21,
|
||||
"cost_for_plan": 0.004153769,
|
||||
"cost_for_plan": 0.004244354,
|
||||
"chosen": true
|
||||
}
|
||||
}
|
||||
@ -12470,7 +12470,7 @@ EXPLAIN
|
||||
{
|
||||
"query_block": {
|
||||
"select_id": 1,
|
||||
"cost": 2.30309056,
|
||||
"cost": 2.303362315,
|
||||
"nested_loop": [
|
||||
{
|
||||
"table": {
|
||||
@ -12502,7 +12502,7 @@ EXPLAIN
|
||||
},
|
||||
"loops": 3,
|
||||
"rows": 1000,
|
||||
"cost": 2.292585745,
|
||||
"cost": 2.2928575,
|
||||
"filtered": 43.11999893,
|
||||
"attached_condition": "t1.b < 5000 and t1.c < 1000"
|
||||
}
|
||||
@ -12652,7 +12652,7 @@ explain format=json select * from three, t1 where t1.a=three.a and t1.b<5000 and
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 4312,
|
||||
"cost": 5.325058827,
|
||||
"cost": 5.325149412,
|
||||
"chosen": false,
|
||||
"cause": "cost"
|
||||
}
|
||||
@ -12778,22 +12778,22 @@ explain format=json select * from three, t1 where t1.a=three.a and t1.b<5000 and
|
||||
"reason": "not available",
|
||||
"filter": {
|
||||
"rowid_filter_index": "b",
|
||||
"index_only_cost": 0.092006157,
|
||||
"index_only_cost": 0.092096742,
|
||||
"filter_startup_cost": 0.149564727,
|
||||
"find_key_and_filter_lookup_cost": 0.129350121,
|
||||
"filter_selectivity": 0.4312,
|
||||
"original_rows": 1000,
|
||||
"new_rows": 431.2,
|
||||
"original_access_cost": 1.203290157,
|
||||
"with_filter_access_cost": 0.700541939,
|
||||
"original_access_cost": 1.203380742,
|
||||
"with_filter_access_cost": 0.700632524,
|
||||
"original_found_rows_cost": 1.111284,
|
||||
"with_filter_found_rows_cost": 0.479185661,
|
||||
"org_cost": 3.705870471,
|
||||
"filter_cost": 2.292585745,
|
||||
"org_cost": 3.706142226,
|
||||
"filter_cost": 2.2928575,
|
||||
"filter_used": true
|
||||
},
|
||||
"rows": 431.2,
|
||||
"cost": 2.292585745,
|
||||
"cost": 2.2928575,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -12880,7 +12880,7 @@ explain format=json select * from three, t1 where t1.a=three.a and t1.b<5000 and
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 4312,
|
||||
"cost": 5.325058827,
|
||||
"cost": 5.325149412,
|
||||
"chosen": false,
|
||||
"cause": "cost"
|
||||
}
|
||||
@ -12934,7 +12934,7 @@ EXPLAIN
|
||||
{
|
||||
"query_block": {
|
||||
"select_id": 1,
|
||||
"cost": 0.003717837,
|
||||
"cost": 0.003808422,
|
||||
"nested_loop": [
|
||||
{
|
||||
"table": {
|
||||
@ -12946,7 +12946,7 @@ EXPLAIN
|
||||
"used_key_parts": ["a"],
|
||||
"loops": 1,
|
||||
"rows": 2,
|
||||
"cost": 0.003717837,
|
||||
"cost": 0.003808422,
|
||||
"filtered": 100,
|
||||
"index_condition": "t10.a < 3 and t10.b <> 5",
|
||||
"attached_condition": "t10.c < 10"
|
||||
|
||||
@ -113,12 +113,12 @@ explain select * from t1 where a=1 or b=1 {
|
||||
"using_mrr": false,
|
||||
"index_only": true,
|
||||
"rows": 1,
|
||||
"cost": 0.001388369,
|
||||
"cost": 0.001478954,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
"index_to_merge": "a",
|
||||
"cumulated_cost": 0.001388369
|
||||
"cumulated_cost": 0.001478954
|
||||
},
|
||||
{
|
||||
"range_scan_alternatives": [
|
||||
@ -129,15 +129,15 @@ explain select * from t1 where a=1 or b=1 {
|
||||
"using_mrr": false,
|
||||
"index_only": true,
|
||||
"rows": 1,
|
||||
"cost": 0.001388369,
|
||||
"cost": 0.001478954,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
"index_to_merge": "b",
|
||||
"cumulated_cost": 0.002776738
|
||||
"cumulated_cost": 0.002957908
|
||||
}
|
||||
],
|
||||
"cost_of_reading_ranges": 0.002776738,
|
||||
"cost_of_reading_ranges": 0.002957908,
|
||||
"use_roworder_union": true,
|
||||
"cause": "always cheaper than non roworder retrieval",
|
||||
"analyzing_roworder_scans": [
|
||||
@ -160,7 +160,7 @@ explain select * from t1 where a=1 or b=1 {
|
||||
}
|
||||
}
|
||||
],
|
||||
"index_roworder_union_cost": 0.005004612,
|
||||
"index_roworder_union_cost": 0.005185782,
|
||||
"members": 2,
|
||||
"chosen": true
|
||||
}
|
||||
@ -189,7 +189,7 @@ explain select * from t1 where a=1 or b=1 {
|
||||
]
|
||||
},
|
||||
"rows_for_plan": 2,
|
||||
"cost_for_plan": 0.005004612,
|
||||
"cost_for_plan": 0.005185782,
|
||||
"chosen": true
|
||||
}
|
||||
}
|
||||
@ -222,7 +222,7 @@ explain select * from t1 where a=1 or b=1 {
|
||||
"rows": 2,
|
||||
"rows_after_filter": 2,
|
||||
"rows_out": 2,
|
||||
"cost": 0.005004612,
|
||||
"cost": 0.005185782,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -230,7 +230,7 @@ explain select * from t1 where a=1 or b=1 {
|
||||
"type": "index_merge",
|
||||
"rows_read": 2,
|
||||
"rows_out": 2,
|
||||
"cost": 0.005004612,
|
||||
"cost": 0.005185782,
|
||||
"uses_join_buffering": false
|
||||
}
|
||||
}
|
||||
@ -241,14 +241,14 @@ explain select * from t1 where a=1 or b=1 {
|
||||
"plan_prefix": "",
|
||||
"table": "t1",
|
||||
"rows_for_plan": 2,
|
||||
"cost_for_plan": 0.005004612
|
||||
"cost_for_plan": 0.005185782
|
||||
}
|
||||
]
|
||||
},
|
||||
{
|
||||
"best_join_order": ["t1"],
|
||||
"rows": 2,
|
||||
"cost": 0.005004612
|
||||
"cost": 0.005185782
|
||||
},
|
||||
{
|
||||
"substitute_best_equal": {
|
||||
@ -347,7 +347,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 2243,
|
||||
"cost": 2.770260666,
|
||||
"cost": 2.770351251,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -358,7 +358,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 2243,
|
||||
"cost": 2.770260666,
|
||||
"cost": 2.770351251,
|
||||
"chosen": false,
|
||||
"cause": "cost"
|
||||
},
|
||||
@ -370,7 +370,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 2243,
|
||||
"cost": 2.770260666,
|
||||
"cost": 2.770351251,
|
||||
"chosen": false,
|
||||
"cause": "cost"
|
||||
}
|
||||
@ -492,7 +492,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": true,
|
||||
"rows": 2243,
|
||||
"cost": 0.312832109,
|
||||
"cost": 0.312922694,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -503,13 +503,13 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": true,
|
||||
"rows": 2243,
|
||||
"cost": 0.312832109,
|
||||
"cost": 0.312922694,
|
||||
"chosen": false,
|
||||
"cause": "cost"
|
||||
}
|
||||
],
|
||||
"index_to_merge": "key1",
|
||||
"cumulated_cost": 0.312832109
|
||||
"cumulated_cost": 0.312922694
|
||||
},
|
||||
{
|
||||
"range_scan_alternatives":
|
||||
@ -522,7 +522,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": true,
|
||||
"rows": 2243,
|
||||
"cost": 0.312832109,
|
||||
"cost": 0.312922694,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -533,16 +533,16 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": true,
|
||||
"rows": 2243,
|
||||
"cost": 0.312832109,
|
||||
"cost": 0.312922694,
|
||||
"chosen": false,
|
||||
"cause": "cost"
|
||||
}
|
||||
],
|
||||
"index_to_merge": "key3",
|
||||
"cumulated_cost": 0.625664218
|
||||
"cumulated_cost": 0.625845388
|
||||
}
|
||||
],
|
||||
"cost_of_reading_ranges": 0.625664218,
|
||||
"cost_of_reading_ranges": 0.625845388,
|
||||
"use_roworder_union": true,
|
||||
"cause": "always cheaper than non roworder retrieval",
|
||||
"analyzing_roworder_scans":
|
||||
|
||||
@ -118,7 +118,7 @@ explain select * from t1 where pk1 != 0 and key1 = 1 {
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 1000,
|
||||
"cost": 0.19579056,
|
||||
"cost": 0.19598856,
|
||||
"chosen": false,
|
||||
"cause": "cost"
|
||||
},
|
||||
@ -129,7 +129,7 @@ explain select * from t1 where pk1 != 0 and key1 = 1 {
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 1,
|
||||
"cost": 0.00415068,
|
||||
"cost": 0.00424968,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
@ -168,7 +168,7 @@ explain select * from t1 where pk1 != 0 and key1 = 1 {
|
||||
"ranges": ["(1) <= (key1) <= (1)"]
|
||||
},
|
||||
"rows_for_plan": 1,
|
||||
"cost_for_plan": 0.00415068,
|
||||
"cost_for_plan": 0.00424968,
|
||||
"chosen": true
|
||||
}
|
||||
}
|
||||
@ -216,7 +216,7 @@ explain select * from t1 where pk1 != 0 and key1 = 1 {
|
||||
"index": "key1",
|
||||
"used_range_estimates": true,
|
||||
"rows": 1,
|
||||
"cost": 0.00335956,
|
||||
"cost": 0.00345856,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -229,7 +229,7 @@ explain select * from t1 where pk1 != 0 and key1 = 1 {
|
||||
"type": "ref",
|
||||
"rows_read": 1,
|
||||
"rows_out": 1,
|
||||
"cost": 0.00335956,
|
||||
"cost": 0.00345856,
|
||||
"uses_join_buffering": false
|
||||
}
|
||||
}
|
||||
@ -240,14 +240,14 @@ explain select * from t1 where pk1 != 0 and key1 = 1 {
|
||||
"plan_prefix": "",
|
||||
"table": "t1",
|
||||
"rows_for_plan": 1,
|
||||
"cost_for_plan": 0.00335956
|
||||
"cost_for_plan": 0.00345856
|
||||
}
|
||||
]
|
||||
},
|
||||
{
|
||||
"best_join_order": ["t1"],
|
||||
"rows": 1,
|
||||
"cost": 0.00335956
|
||||
"cost": 0.00345856
|
||||
},
|
||||
{
|
||||
"substitute_best_equal": {
|
||||
|
||||
@ -58,7 +58,7 @@ JS
|
||||
"index": "a",
|
||||
"used_range_estimates": true,
|
||||
"rows": 104,
|
||||
"cost": 0.060906438,
|
||||
"cost": 0.060988785,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -66,7 +66,7 @@ JS
|
||||
"index": "b",
|
||||
"used_range_estimates": true,
|
||||
"rows": 340,
|
||||
"cost": 0.14153631,
|
||||
"cost": 0.141618657,
|
||||
"chosen": false,
|
||||
"cause": "cost"
|
||||
},
|
||||
@ -75,7 +75,7 @@ JS
|
||||
"index": "c",
|
||||
"used_range_estimates": true,
|
||||
"rows": 632,
|
||||
"cost": 0.241743894,
|
||||
"cost": 0.241826241,
|
||||
"chosen": false,
|
||||
"cause": "cost"
|
||||
},
|
||||
@ -156,7 +156,7 @@ JS
|
||||
"index": "a",
|
||||
"used_range_estimates": true,
|
||||
"rows": 6,
|
||||
"cost": 0.005306142,
|
||||
"cost": 0.005388489,
|
||||
"chosen": true
|
||||
},
|
||||
{
|
||||
@ -164,7 +164,7 @@ JS
|
||||
"index": "b",
|
||||
"used_range_estimates": true,
|
||||
"rows": 232,
|
||||
"cost": 0.104637894,
|
||||
"cost": 0.104720241,
|
||||
"chosen": false,
|
||||
"cause": "cost"
|
||||
},
|
||||
@ -173,7 +173,7 @@ JS
|
||||
"index": "c",
|
||||
"used_range_estimates": true,
|
||||
"rows": 293,
|
||||
"cost": 0.125478666,
|
||||
"cost": 0.125561013,
|
||||
"chosen": false,
|
||||
"cause": "cost"
|
||||
},
|
||||
@ -188,7 +188,7 @@ JS
|
||||
"type": "ref",
|
||||
"rows_read": 6,
|
||||
"rows_out": 0.6,
|
||||
"cost": 0.005306142,
|
||||
"cost": 0.005388489,
|
||||
"uses_join_buffering": false
|
||||
}
|
||||
}
|
||||
@ -199,7 +199,7 @@ JS
|
||||
"plan_prefix": "",
|
||||
"table": "t1",
|
||||
"rows_for_plan": 0.6,
|
||||
"cost_for_plan": 0.005306142,
|
||||
"cost_for_plan": 0.005388489,
|
||||
"pushdown_cond_selectivity": 0.1,
|
||||
"filtered": 10,
|
||||
"rows_out": 0.6
|
||||
|
||||
@ -41,7 +41,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
|
||||
"using_mrr": false,
|
||||
"index_only": false,
|
||||
"rows": 2,
|
||||
"cost": 0.003717837,
|
||||
"cost": 0.003808422,
|
||||
"chosen": true
|
||||
}
|
||||
],
|
||||
|
||||
@ -228,7 +228,7 @@ flush tables;
|
||||
explain select sum(t2.p+length(t1.a)) from t1, t2 where t1.p = t2.i;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL PRIMARY NULL NULL NULL 2
|
||||
1 SIMPLE t2 ref k1 k1 5 test.t1.p 2
|
||||
1 SIMPLE t2 ref k1 k1 5 test.t1.p 1
|
||||
set @@optimizer_scan_setup_cost=0.0, @@global.myisam.optimizer_disk_read_ratio=0.0;
|
||||
flush tables;
|
||||
explain select sum(t2.p+length(t1.a)) from t1, t2 where t1.p = t2.i;
|
||||
|
||||
@ -3033,17 +3033,17 @@ EXPLAIN
|
||||
SELECT t1.a FROM t1 LEFT JOIN t2 ON t1.a=t2.a ORDER BY t1.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 index NULL PRIMARY 4 NULL 8 Using index
|
||||
1 SIMPLE t2 ref i_a i_a 5 test.t1.a 2 Using index
|
||||
1 SIMPLE t2 ref i_a i_a 5 test.t1.a 1 Using index
|
||||
EXPLAIN
|
||||
SELECT t1.a FROM t1 LEFT JOIN t2 ON t1.a=t2.a ORDER BY t1.a LIMIT 8;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 index NULL PRIMARY 4 NULL 4 Using index
|
||||
1 SIMPLE t2 ref i_a i_a 5 test.t1.a 2 Using index
|
||||
1 SIMPLE t1 index NULL PRIMARY 4 NULL 6 Using index
|
||||
1 SIMPLE t2 ref i_a i_a 5 test.t1.a 1 Using index
|
||||
EXPLAIN
|
||||
SELECT t1.a FROM t1 LEFT JOIN t2 ON t1.a=t2.a ORDER BY t1.a LIMIT 100;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 index NULL PRIMARY 4 NULL 8 Using index
|
||||
1 SIMPLE t2 ref i_a i_a 5 test.t1.a 2 Using index
|
||||
1 SIMPLE t2 ref i_a i_a 5 test.t1.a 1 Using index
|
||||
DROP TABLE t1,t2;
|
||||
#
|
||||
# MDEV-4974 memory leak in 5.5.32-MariaDB-1~wheezy-log
|
||||
|
||||
@ -2677,12 +2677,12 @@ select * from t1 X, t1 Y
|
||||
where X.b = Y.b and (X.a=1 or X.a=2) and (Y.a=2 or Y.a=3);
|
||||
id select_type table partitions type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE X p1,p2 range a,b a 4 NULL 4 Using where
|
||||
1 SIMPLE Y p2,p3 ref|filter a,b b|a 4|4 test.X.b 2 (50%) Using where; Using rowid filter
|
||||
1 SIMPLE Y p2,p3 ref|filter a,b b|a 4|4 test.X.b 1 (50%) Using where; Using rowid filter
|
||||
explain partitions
|
||||
select * from t1 X, t1 Y where X.a = Y.a and (X.a=1 or X.a=2);
|
||||
id select_type table partitions type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE X p1,p2 range a a 4 NULL 4 Using where
|
||||
1 SIMPLE Y p1,p2 ref a a 4 test.X.a 2
|
||||
1 SIMPLE Y p1,p2 ref a a 4 test.X.a 1
|
||||
drop table t1;
|
||||
create table t1 (a int) partition by hash(a) partitions 20;
|
||||
insert into t1 values (1),(2),(3);
|
||||
|
||||
@ -2407,7 +2407,7 @@ insert into t2 values (1,3), (2,3), (3,4), (4,4);
|
||||
explain select * from t1 left join t2 on a=c where d in (4);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ref c,d d 5 const 2 Using where
|
||||
1 SIMPLE t1 ref a a 5 test.t2.c 2
|
||||
1 SIMPLE t1 ref a a 5 test.t2.c 1
|
||||
select * from t1 left join t2 on a=c where d in (4);
|
||||
a b c d
|
||||
3 2 3 4
|
||||
@ -2415,7 +2415,7 @@ a b c d
|
||||
explain select * from t1 left join t2 on a=c where d = 4;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ref c,d d 5 const 2 Using where
|
||||
1 SIMPLE t1 ref a a 5 test.t2.c 2
|
||||
1 SIMPLE t1 ref a a 5 test.t2.c 1
|
||||
select * from t1 left join t2 on a=c where d = 4;
|
||||
a b c d
|
||||
3 2 3 4
|
||||
@ -2442,11 +2442,11 @@ INSERT INTO t2 VALUES ('one'),('two'),('three'),('four'),('five');
|
||||
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 USE INDEX (a) ON t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref a a 23 test.t1.a 2 Using where
|
||||
1 SIMPLE t2 ref a a 23 test.t1.a 1 Using where
|
||||
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 FORCE INDEX (a) ON t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref a a 23 test.t1.a 2 Using where
|
||||
1 SIMPLE t2 ref a a 23 test.t1.a 1 Using where
|
||||
DROP TABLE t1, t2;
|
||||
CREATE TABLE t1 ( city char(30) );
|
||||
INSERT INTO t1 VALUES ('London');
|
||||
@ -3926,7 +3926,7 @@ cc 3 7
|
||||
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref name name 6 test.t1.name 2 Using where
|
||||
1 SIMPLE t2 ref name name 6 test.t1.name 1 Using where
|
||||
SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name;
|
||||
name name n
|
||||
ccc NULL NULL
|
||||
@ -4019,7 +4019,7 @@ cc 3 7
|
||||
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref name name 6 test.t1.name 2 Using where
|
||||
1 SIMPLE t2 ref name name 6 test.t1.name 1 Using where
|
||||
SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name;
|
||||
name name n
|
||||
ccc NULL NULL
|
||||
|
||||
@ -2418,7 +2418,7 @@ insert into t2 values (1,3), (2,3), (3,4), (4,4);
|
||||
explain select * from t1 left join t2 on a=c where d in (4);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ref c,d d 5 const 2 Using where
|
||||
1 SIMPLE t1 ref a a 5 test.t2.c 2 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t1 ref a a 5 test.t2.c 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
select * from t1 left join t2 on a=c where d in (4);
|
||||
a b c d
|
||||
3 2 3 4
|
||||
@ -2426,7 +2426,7 @@ a b c d
|
||||
explain select * from t1 left join t2 on a=c where d = 4;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ref c,d d 5 const 2 Using where
|
||||
1 SIMPLE t1 ref a a 5 test.t2.c 2 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE t1 ref a a 5 test.t2.c 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
select * from t1 left join t2 on a=c where d = 4;
|
||||
a b c d
|
||||
3 2 3 4
|
||||
@ -2453,11 +2453,11 @@ INSERT INTO t2 VALUES ('one'),('two'),('three'),('four'),('five');
|
||||
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 USE INDEX (a) ON t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref a a 23 test.t1.a 2 Using where
|
||||
1 SIMPLE t2 ref a a 23 test.t1.a 1 Using where
|
||||
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 FORCE INDEX (a) ON t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref a a 23 test.t1.a 2 Using where
|
||||
1 SIMPLE t2 ref a a 23 test.t1.a 1 Using where
|
||||
DROP TABLE t1, t2;
|
||||
CREATE TABLE t1 ( city char(30) );
|
||||
INSERT INTO t1 VALUES ('London');
|
||||
@ -3937,7 +3937,7 @@ cc 3 7
|
||||
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref name name 6 test.t1.name 2 Using where
|
||||
1 SIMPLE t2 ref name name 6 test.t1.name 1 Using where
|
||||
SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name;
|
||||
name name n
|
||||
ccc NULL NULL
|
||||
@ -4030,7 +4030,7 @@ cc 3 7
|
||||
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref name name 6 test.t1.name 2 Using where
|
||||
1 SIMPLE t2 ref name name 6 test.t1.name 1 Using where
|
||||
SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name;
|
||||
name name n
|
||||
ccc NULL NULL
|
||||
|
||||
@ -2407,7 +2407,7 @@ insert into t2 values (1,3), (2,3), (3,4), (4,4);
|
||||
explain select * from t1 left join t2 on a=c where d in (4);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ref c,d d 5 const 2 Using where
|
||||
1 SIMPLE t1 ref a a 5 test.t2.c 2
|
||||
1 SIMPLE t1 ref a a 5 test.t2.c 1
|
||||
select * from t1 left join t2 on a=c where d in (4);
|
||||
a b c d
|
||||
3 2 3 4
|
||||
@ -2415,7 +2415,7 @@ a b c d
|
||||
explain select * from t1 left join t2 on a=c where d = 4;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ref c,d d 5 const 2 Using where
|
||||
1 SIMPLE t1 ref a a 5 test.t2.c 2
|
||||
1 SIMPLE t1 ref a a 5 test.t2.c 1
|
||||
select * from t1 left join t2 on a=c where d = 4;
|
||||
a b c d
|
||||
3 2 3 4
|
||||
@ -2442,11 +2442,11 @@ INSERT INTO t2 VALUES ('one'),('two'),('three'),('four'),('five');
|
||||
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 USE INDEX (a) ON t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref a a 23 test.t1.a 2 Using where
|
||||
1 SIMPLE t2 ref a a 23 test.t1.a 1 Using where
|
||||
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 FORCE INDEX (a) ON t1.a=t2.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref a a 23 test.t1.a 2 Using where
|
||||
1 SIMPLE t2 ref a a 23 test.t1.a 1 Using where
|
||||
DROP TABLE t1, t2;
|
||||
CREATE TABLE t1 ( city char(30) );
|
||||
INSERT INTO t1 VALUES ('London');
|
||||
@ -3926,7 +3926,7 @@ cc 3 7
|
||||
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref name name 6 test.t1.name 2 Using where
|
||||
1 SIMPLE t2 ref name name 6 test.t1.name 1 Using where
|
||||
SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name;
|
||||
name name n
|
||||
ccc NULL NULL
|
||||
@ -4019,7 +4019,7 @@ cc 3 7
|
||||
EXPLAIN SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 5
|
||||
1 SIMPLE t2 ref name name 6 test.t1.name 2 Using where
|
||||
1 SIMPLE t2 ref name name 6 test.t1.name 1 Using where
|
||||
SELECT * FROM t1 LEFT JOIN t2 ON t1.name=t2.name;
|
||||
name name n
|
||||
ccc NULL NULL
|
||||
|
||||
@ -755,7 +755,7 @@ EXPLAIN EXTENDED
|
||||
SELECT * FROM v1 INNER JOIN t2 ON ( a = c AND b = d );
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 SIMPLE t2 ref idx idx 5 test.t1.b 2 100.00 Using where
|
||||
1 SIMPLE t2 ref idx idx 5 test.t1.b 1 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t1` join `test`.`t2` where `test`.`t2`.`c` = `test`.`t1`.`a` and `test`.`t2`.`d` = `test`.`t1`.`b`
|
||||
SELECT * FROM v1 INNER JOIN t2 ON ( a = c AND b = d );
|
||||
|
||||
@ -345,7 +345,7 @@ patient_uq clinic_uq
|
||||
explain extended select * from t6 where exists (select * from t7 where uq = clinic_uq);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t7 index PRIMARY PRIMARY 4 NULL 2 100.00 Using index
|
||||
1 PRIMARY t6 ref i1 i1 5 test.t7.uq 2 100.00
|
||||
1 PRIMARY t6 ref i1 i1 5 test.t7.uq 1 100.00
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t6.clinic_uq' of SELECT #2 was resolved in SELECT #1
|
||||
Note 1003 select `test`.`t6`.`patient_uq` AS `patient_uq`,`test`.`t6`.`clinic_uq` AS `clinic_uq` from `test`.`t7` join `test`.`t6` where `test`.`t6`.`clinic_uq` = `test`.`t7`.`uq`
|
||||
@ -4408,7 +4408,7 @@ CREATE INDEX I2 ON t1 (b);
|
||||
EXPLAIN SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index I1 I1 2 NULL 2 Using where; Using index; LooseScan
|
||||
1 PRIMARY t1 ref I2 I2 13 test.t1.a 2 Using index condition
|
||||
1 PRIMARY t1 ref I2 I2 13 test.t1.a 1 Using index condition
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
|
||||
a b
|
||||
CREATE TABLE t2 (a VARCHAR(1), b VARCHAR(10));
|
||||
@ -4418,14 +4418,14 @@ CREATE INDEX I2 ON t2 (b);
|
||||
EXPLAIN SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 index I1 I1 4 NULL 2 Using where; Using index; LooseScan
|
||||
1 PRIMARY t2 ref I2 I2 13 test.t2.a 2 Using index condition
|
||||
1 PRIMARY t2 ref I2 I2 13 test.t2.a 1 Using index condition
|
||||
SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
|
||||
a b
|
||||
EXPLAIN
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index I1 I1 2 NULL 2 Using where; Using index; LooseScan
|
||||
1 PRIMARY t1 ref I2 I2 13 test.t1.a 2 Using index condition
|
||||
1 PRIMARY t1 ref I2 I2 13 test.t1.a 1 Using index condition
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500);
|
||||
a b
|
||||
DROP TABLE t1,t2;
|
||||
@ -6657,7 +6657,7 @@ SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquer
|
||||
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index NULL a 4 NULL 2 Using where; Using index
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 4 func 2 Using index
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 4 func 1 Using index
|
||||
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
|
||||
a
|
||||
2009-01-01
|
||||
@ -6860,7 +6860,7 @@ FROM t1 AS alias1, t1 AS alias2, t1 AS alias3
|
||||
WHERE alias1.a = alias2.a OR ('Moscow') IN ( SELECT a FROM t1 );
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY alias1 index a a 19 NULL 11 Using where; Using index
|
||||
1 PRIMARY alias2 ref a a 19 test.alias1.a 2 Using index
|
||||
1 PRIMARY alias2 ref a a 19 test.alias1.a 1 Using index
|
||||
1 PRIMARY alias3 index NULL a 19 NULL 11 Using index; Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY t1 index_subquery a a 19 const 1 Using index; Using where
|
||||
SELECT MAX( alias2.a )
|
||||
@ -7011,7 +7011,7 @@ WHERE SLEEP(0.1) OR c < 'p' OR b = ( SELECT MIN(b) FROM t2 );
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 system NULL NULL NULL NULL 1
|
||||
1 PRIMARY t2 ALL b NULL NULL NULL 2 Using where
|
||||
1 PRIMARY t3 ref d d 5 test.t2.b 2 Using index
|
||||
1 PRIMARY t3 ref d d 5 test.t2.b 1 Using index
|
||||
3 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
set @tmp_mdev410=@@global.userstat;
|
||||
set global userstat=on;
|
||||
@ -7043,7 +7043,7 @@ EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP B
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
||||
2 SUBQUERY t1 range a a 5 NULL 2 Using where; Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 1 Using index
|
||||
DROP TABLE t1,t2;
|
||||
#
|
||||
# MDEV-435: Expensive subqueries may be evaluated during optimization in merge_key_fields
|
||||
@ -7077,7 +7077,7 @@ EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP B
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
||||
2 SUBQUERY t1 range a a 5 NULL 2 Using where; Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 1 Using index
|
||||
DROP TABLE t1,t2;
|
||||
#
|
||||
# MDEV-5991: crash in Item_field::used_tables
|
||||
|
||||
@ -162,7 +162,7 @@ EXPLAIN
|
||||
SELECT * FROM t2,t3 WHERE (2,9) IN (SELECT DISTINCT a,pk FROM t1) OR a = b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 index a a 5 NULL 2 Using where; Using index
|
||||
1 PRIMARY t3 ref b b 5 test.t2.a 2 Using index
|
||||
1 PRIMARY t3 ref b b 5 test.t2.a 1 Using index
|
||||
2 SUBQUERY t1 const PRIMARY,a a 9 const,const 1 Using where; Using index
|
||||
SELECT * FROM t2,t3 WHERE (2,9) IN (SELECT DISTINCT a,pk FROM t1) OR a = b;
|
||||
pk a b
|
||||
@ -171,7 +171,7 @@ EXPLAIN
|
||||
SELECT * FROM t2,t3 WHERE (2,9) IN (SELECT DISTINCT a,pk FROM v1) OR a = b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 index a a 5 NULL 2 Using where; Using index
|
||||
1 PRIMARY t3 ref b b 5 test.t2.a 2 Using index
|
||||
1 PRIMARY t3 ref b b 5 test.t2.a 1 Using index
|
||||
2 SUBQUERY t1 const PRIMARY,a a 9 const,const 1 Using where; Using index
|
||||
SELECT * FROM t2,t3 WHERE (2,9) IN (SELECT DISTINCT a,pk FROM v1) OR a = b;
|
||||
pk a b
|
||||
@ -339,7 +339,7 @@ where t1.a = t2.a and ( t1.a = ( select min(a) from t1 ) or 0 );
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)
|
||||
1 PRIMARY t3 ref idx idx 6 func 2 100.00 Using where; Using index
|
||||
1 PRIMARY t3 ref idx idx 6 func 1 100.00 Using where; Using index
|
||||
2 SUBQUERY t1 ALL NULL NULL NULL NULL 2 100.00
|
||||
Warnings:
|
||||
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,`test`.`t3`.`a` AS `a` from `test`.`t1` join `test`.`t2` left join `test`.`t3` on(`test`.`t3`.`a` = `test`.`t1`.`a`) where `test`.`t1`.`a` = (/* select#2 */ select min(`test`.`t1`.`a`) from `test`.`t1`) and `test`.`t2`.`a` = (/* select#2 */ select min(`test`.`t1`.`a`) from `test`.`t1`)
|
||||
|
||||
@ -193,7 +193,7 @@ t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z
|
||||
from t3;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00
|
||||
2 DEPENDENT SUBQUERY t1 ref a a 4 func 2 100.00 Using where; Full scan on NULL key
|
||||
2 DEPENDENT SUBQUERY t1 ref a a 4 func 1 100.00 Using where; Full scan on NULL key
|
||||
2 DEPENDENT SUBQUERY t2 ref a a 4 test.t1.b 1 100.00 Using where
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1
|
||||
|
||||
@ -196,7 +196,7 @@ t3.a in (select t1.a from t1, t2 where t1.b=t2.a and t2.b=t3.oref) Z
|
||||
from t3;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 3 100.00
|
||||
2 DEPENDENT SUBQUERY t1 ref a a 4 func 2 100.00 Using where; Full scan on NULL key
|
||||
2 DEPENDENT SUBQUERY t1 ref a a 4 func 1 100.00 Using where; Full scan on NULL key
|
||||
2 DEPENDENT SUBQUERY t2 ref a a 4 test.t1.b 1 100.00 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t3.oref' of SELECT #2 was resolved in SELECT #1
|
||||
|
||||
@ -265,7 +265,7 @@ EXPLAIN
|
||||
SELECT * FROM t1 WHERE NULL NOT IN (SELECT t2c.i FROM t2c WHERE t2c.pk = t1.pk);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
|
||||
2 DEPENDENT SUBQUERY t2c index_subquery it2c it2c 8 const,test.t1.pk 2 Using index; Using where; Full scan on NULL key
|
||||
2 DEPENDENT SUBQUERY t2c index_subquery it2c it2c 8 const,test.t1.pk 1 Using index; Using where; Full scan on NULL key
|
||||
SELECT * FROM t1 WHERE NULL NOT IN (SELECT t2c.i FROM t2c WHERE t2c.pk = t1.pk);
|
||||
pk i
|
||||
SELECT * FROM t1 WHERE NULL IN (SELECT t2c.i FROM t2c WHERE t2c.pk = t1.pk) IS UNKNOWN;
|
||||
@ -335,7 +335,7 @@ EXPLAIN
|
||||
SELECT * FROM t1 WHERE (NULL, 1) NOT IN (SELECT t2c.i, t2c.pk FROM t2c WHERE t2c.pk = t1.pk);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
|
||||
2 DEPENDENT SUBQUERY t2c index_subquery it2c it2c 8 const,test.t1.pk 2 Using index; Using where; Full scan on NULL key
|
||||
2 DEPENDENT SUBQUERY t2c index_subquery it2c it2c 8 const,test.t1.pk 1 Using index; Using where; Full scan on NULL key
|
||||
SELECT * FROM t1 WHERE (NULL, 1) NOT IN (SELECT t2c.i, t2c.pk FROM t2c WHERE t2c.pk = t1.pk);
|
||||
pk i
|
||||
0 10
|
||||
@ -1170,7 +1170,7 @@ WHERE (t2.pk = t1.pk) AND t2.pk IN (SELECT f2 FROM t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 system PRIMARY NULL NULL NULL 1
|
||||
1 PRIMARY t1 const PRIMARY PRIMARY 4 const 1
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery f2 f2 4 func 2 Using index
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery f2 f2 4 func 1 Using index
|
||||
SELECT t1.f3, MAX(t1.f2)
|
||||
FROM t1, t2
|
||||
WHERE (t2.pk = t1.pk) AND t2.pk IN (SELECT f2 FROM t1);
|
||||
@ -2797,7 +2797,7 @@ EXPLAIN
|
||||
SELECT * FROM t2 WHERE (t2.a,t2.b) IN (('abc',1), ('def', 2));
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 Using where
|
||||
1 PRIMARY <derived3> ref key1 key1 4 test.t2.b 2 Using where; FirstMatch(t2)
|
||||
1 PRIMARY <derived3> ref key1 key1 4 test.t2.b 1 Using where; FirstMatch(t2)
|
||||
3 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used
|
||||
set names default;
|
||||
set @@in_predicate_conversion_threshold= @save_in_predicate_conversion_threshold;
|
||||
|
||||
@ -52,7 +52,7 @@ explain extended
|
||||
SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t3 WHERE t3.b = t1.a);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 index aa aa 4 NULL 2 100.00 Using where; Using index
|
||||
1 PRIMARY t3 ref bb bb 4 test.t1.a 2 50.00 FirstMatch(t1)
|
||||
1 PRIMARY t3 ref bb bb 4 test.t1.a 1 100.00 FirstMatch(t1)
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
|
||||
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t3`) where `test`.`t3`.`b` = `test`.`t1`.`a`
|
||||
@ -65,7 +65,7 @@ explain extended
|
||||
SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t3 WHERE t3.b = t1.a);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 index NULL aa 4 NULL 2 100.00 Using where; Using index
|
||||
2 DEPENDENT SUBQUERY t3 index_subquery bb bb 4 func 2 100.00
|
||||
2 DEPENDENT SUBQUERY t3 index_subquery bb bb 4 func 1 100.00
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
|
||||
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where <in_optimizer>(`test`.`t1`.`a`,<exists>(<index_lookup>(<cache>(`test`.`t1`.`a`) in t3 on bb)))
|
||||
@ -91,7 +91,7 @@ explain extended
|
||||
SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t3 WHERE t3.b = t1.a);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 index NULL aa 4 NULL 2 100.00 Using where; Using index
|
||||
2 DEPENDENT SUBQUERY t3 ref bb bb 4 test.t1.a 2 100.00
|
||||
2 DEPENDENT SUBQUERY t3 ref bb bb 4 test.t1.a 1 100.00
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
|
||||
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` where exists(/* select#2 */ select `test`.`t3`.`a` from `test`.`t3` where `test`.`t3`.`b` = `test`.`t1`.`a` limit 1)
|
||||
@ -391,7 +391,7 @@ explain extended
|
||||
SELECT * FROM t1 WHERE EXISTS ( SELECT * FROM t3 WHERE t3.b = t1.a and t3.b1 = t1.a1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t3 index bb bb 8 NULL 2 100.00 Using where; Using index; LooseScan
|
||||
1 PRIMARY t1 ref aa aa 8 test.t3.b,test.t3.b1 2 50.00 Using index
|
||||
1 PRIMARY t1 ref aa aa 8 test.t3.b,test.t3.b1 1 50.00 Using index
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
|
||||
Note 1276 Field or reference 'test.t1.a1' of SELECT #2 was resolved in SELECT #1
|
||||
@ -405,7 +405,7 @@ explain extended
|
||||
SELECT * FROM t1 WHERE EXISTS ( SELECT * FROM t3 WHERE t3.b = t1.a and t3.b1 = t1.a1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 index NULL aa 8 NULL 2 100.00 Using where; Using index
|
||||
2 DEPENDENT SUBQUERY t3 index_subquery bb bb 8 func,func 2 100.00 Using index; Using where
|
||||
2 DEPENDENT SUBQUERY t3 index_subquery bb bb 8 func,func 1 100.00 Using index; Using where
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
|
||||
Note 1276 Field or reference 'test.t1.a1' of SELECT #2 was resolved in SELECT #1
|
||||
@ -433,7 +433,7 @@ explain extended
|
||||
SELECT * FROM t1 WHERE EXISTS ( SELECT * FROM t3 WHERE t3.b = t1.a and t3.b1 = t1.a1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 index NULL aa 8 NULL 2 100.00 Using where; Using index
|
||||
2 DEPENDENT SUBQUERY t3 ref bb bb 8 test.t1.a,test.t1.a1 2 100.00 Using index
|
||||
2 DEPENDENT SUBQUERY t3 ref bb bb 8 test.t1.a,test.t1.a1 1 100.00 Using index
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t1.a' of SELECT #2 was resolved in SELECT #1
|
||||
Note 1276 Field or reference 'test.t1.a1' of SELECT #2 was resolved in SELECT #1
|
||||
|
||||
@ -393,7 +393,7 @@ EXPLAIN
|
||||
SELECT a FROM t1 WHERE (a,b) IN (SELECT * FROM v1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
|
||||
1 PRIMARY <derived3> ref key0 key0 10 test.t1.a,test.t1.b 2 FirstMatch(t1)
|
||||
1 PRIMARY <derived3> ref key0 key0 10 test.t1.a,test.t1.b 1 FirstMatch(t1)
|
||||
3 DERIVED t2 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort
|
||||
SELECT * FROM v2;
|
||||
a b
|
||||
@ -474,7 +474,7 @@ EXPLAIN
|
||||
SELECT * FROM t1 WHERE t1.b IN (SELECT v2.a FROM v2 WHERE v2.b = t1.a);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
|
||||
1 PRIMARY <derived3> ref key0 key0 10 test.t1.b,test.t1.a 2 FirstMatch(t1)
|
||||
1 PRIMARY <derived3> ref key0 key0 10 test.t1.b,test.t1.a 1 FirstMatch(t1)
|
||||
3 DERIVED t2 ALL NULL NULL NULL NULL 2
|
||||
SELECT * FROM t1 WHERE t1.b IN (SELECT v2.a FROM v2 WHERE v2.b = t1.a);
|
||||
a b
|
||||
|
||||
@ -395,7 +395,7 @@ EXPLAIN
|
||||
SELECT a FROM t1 WHERE (a,b) IN (SELECT * FROM v1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
|
||||
2 DEPENDENT SUBQUERY <derived3> index_subquery key0 key0 10 func,func 2 Using where
|
||||
2 DEPENDENT SUBQUERY <derived3> index_subquery key0 key0 10 func,func 1 Using where
|
||||
3 DERIVED t2 ALL NULL NULL NULL NULL 6 Using temporary; Using filesort
|
||||
SELECT * FROM v2;
|
||||
a b
|
||||
@ -476,7 +476,7 @@ EXPLAIN
|
||||
SELECT * FROM t1 WHERE t1.b IN (SELECT v2.a FROM v2 WHERE v2.b = t1.a);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
|
||||
2 DEPENDENT SUBQUERY <derived3> ref key0 key0 5 test.t1.a 2 Using where
|
||||
2 DEPENDENT SUBQUERY <derived3> ref key0 key0 5 test.t1.a 1 Using where
|
||||
3 DERIVED t2 ALL NULL NULL NULL NULL 2
|
||||
SELECT * FROM t1 WHERE t1.b IN (SELECT v2.a FROM v2 WHERE v2.b = t1.a);
|
||||
a b
|
||||
|
||||
@ -1895,7 +1895,7 @@ WHERE alias4.c = alias3.b
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
|
||||
3 MATERIALIZED alias3 ALL NULL NULL NULL NULL 2 Using where
|
||||
3 MATERIALIZED alias4 ref c c 11 test.alias3.b 2 Using where; Using index
|
||||
3 MATERIALIZED alias4 ref c c 11 test.alias3.b 1 Using where; Using index
|
||||
DROP TABLE t1,t2;
|
||||
#
|
||||
# BUG#928048: Query containing IN subquery with OR in the where clause returns a wrong result
|
||||
@ -2283,7 +2283,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 8 12.50 Using where; FirstMatch
|
||||
2 DEPENDENT SUBQUERY t2 range i2 i2 5 NULL 3 100.00 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY t3 ref i3 i3 5 test.t2.i2 2 100.00 Using index
|
||||
2 DEPENDENT SUBQUERY t3 ref i3 i3 5 test.t2.i2 1 100.00 Using index
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t1.f1' of SELECT #2 was resolved in SELECT #1
|
||||
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1` from `test`.`t1` where <expr_cache><`test`.`t1`.`f1`>(exists(/* select#2 */ select 1 from `test`.`t2` semi join (`test`.`t3`) join `test`.`t3` where `test`.`t3`.`i3` = `test`.`t2`.`i2` and `test`.`t1`.`f1` = `test`.`t3`.`f3` limit 1))
|
||||
|
||||
@ -510,7 +510,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY Country index PRIMARY PRIMARY 3 NULL 239 Using index; Using temporary; Using filesort
|
||||
1 PRIMARY City ref Country Country 3 world.Country.Code 17
|
||||
2 MATERIALIZED Country ALL Name NULL NULL NULL 239 Using where
|
||||
Last_query_cost 7.951232
|
||||
Last_query_cost 7.972882
|
||||
EXPLAIN
|
||||
SELECT City.Name, City.Population
|
||||
FROM Country LEFT JOIN City ON City.Country = Country.Code
|
||||
@ -520,7 +520,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY Country index NULL PRIMARY 3 NULL 239 Using index; Using temporary; Using filesort
|
||||
1 PRIMARY City ref Country Country 3 world.Country.Code 17
|
||||
2 MATERIALIZED Country ALL Name NULL NULL NULL 239 Using where
|
||||
Last_query_cost 7.951232
|
||||
Last_query_cost 7.972882
|
||||
SELECT City.Name, City.Population
|
||||
FROM City JOIN Country ON City.Country = Country.Code
|
||||
GROUP BY City.Name
|
||||
|
||||
@ -4411,7 +4411,7 @@ CREATE INDEX I2 ON t1 (b);
|
||||
EXPLAIN SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index I1 I1 2 NULL 2 Using where; Using index; LooseScan
|
||||
1 PRIMARY t1 ref I2 I2 13 test.t1.a 2 Using index condition
|
||||
1 PRIMARY t1 ref I2 I2 13 test.t1.a 1 Using index condition
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
|
||||
a b
|
||||
CREATE TABLE t2 (a VARCHAR(1), b VARCHAR(10));
|
||||
@ -4421,14 +4421,14 @@ CREATE INDEX I2 ON t2 (b);
|
||||
EXPLAIN SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 index I1 I1 4 NULL 2 Using where; Using index; LooseScan
|
||||
1 PRIMARY t2 ref I2 I2 13 test.t2.a 2 Using index condition
|
||||
1 PRIMARY t2 ref I2 I2 13 test.t2.a 1 Using index condition
|
||||
SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
|
||||
a b
|
||||
EXPLAIN
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index I1 I1 2 NULL 2 Using where; Using index; LooseScan
|
||||
1 PRIMARY t1 ref I2 I2 13 test.t1.a 2 Using index condition
|
||||
1 PRIMARY t1 ref I2 I2 13 test.t1.a 1 Using index condition
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500);
|
||||
a b
|
||||
DROP TABLE t1,t2;
|
||||
@ -6659,7 +6659,7 @@ SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquer
|
||||
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index NULL a 4 NULL 2 Using where; Using index
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 4 func 2 Using index
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 4 func 1 Using index
|
||||
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
|
||||
a
|
||||
2009-01-01
|
||||
@ -6862,7 +6862,7 @@ FROM t1 AS alias1, t1 AS alias2, t1 AS alias3
|
||||
WHERE alias1.a = alias2.a OR ('Moscow') IN ( SELECT a FROM t1 );
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY alias1 index a a 19 NULL 11 Using where; Using index
|
||||
1 PRIMARY alias2 ref a a 19 test.alias1.a 2 Using index
|
||||
1 PRIMARY alias2 ref a a 19 test.alias1.a 1 Using index
|
||||
1 PRIMARY alias3 index NULL a 19 NULL 11 Using index; Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY t1 index_subquery a a 19 const 1 Using index; Using where
|
||||
SELECT MAX( alias2.a )
|
||||
@ -7013,7 +7013,7 @@ WHERE SLEEP(0.1) OR c < 'p' OR b = ( SELECT MIN(b) FROM t2 );
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 system NULL NULL NULL NULL 1
|
||||
1 PRIMARY t2 ALL b NULL NULL NULL 2 Using where
|
||||
1 PRIMARY t3 ref d d 5 test.t2.b 2 Using index
|
||||
1 PRIMARY t3 ref d d 5 test.t2.b 1 Using index
|
||||
3 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
set @tmp_mdev410=@@global.userstat;
|
||||
set global userstat=on;
|
||||
@ -7045,7 +7045,7 @@ EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP B
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
||||
2 SUBQUERY t1 range a a 5 NULL 2 Using where; Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 1 Using index
|
||||
DROP TABLE t1,t2;
|
||||
#
|
||||
# MDEV-435: Expensive subqueries may be evaluated during optimization in merge_key_fields
|
||||
@ -7079,7 +7079,7 @@ EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP B
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
||||
2 SUBQUERY t1 range a a 5 NULL 2 Using where; Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 1 Using index
|
||||
DROP TABLE t1,t2;
|
||||
#
|
||||
# MDEV-5991: crash in Item_field::used_tables
|
||||
|
||||
@ -352,7 +352,7 @@ patient_uq clinic_uq
|
||||
explain extended select * from t6 where exists (select * from t7 where uq = clinic_uq);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t7 index PRIMARY PRIMARY 4 NULL 2 100.00 Using index
|
||||
1 PRIMARY t6 ref i1 i1 5 test.t7.uq 2 100.00
|
||||
1 PRIMARY t6 ref i1 i1 5 test.t7.uq 1 100.00
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t6.clinic_uq' of SELECT #2 was resolved in SELECT #1
|
||||
Note 1003 select `test`.`t6`.`patient_uq` AS `patient_uq`,`test`.`t6`.`clinic_uq` AS `clinic_uq` from `test`.`t7` join `test`.`t6` where `test`.`t6`.`clinic_uq` = `test`.`t7`.`uq`
|
||||
@ -4411,7 +4411,7 @@ CREATE INDEX I2 ON t1 (b);
|
||||
EXPLAIN SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index I1 I1 2 NULL 2 Using where; Using index; LooseScan
|
||||
1 PRIMARY t1 ref I2 I2 13 test.t1.a 2 Using index condition
|
||||
1 PRIMARY t1 ref I2 I2 13 test.t1.a 1 Using index condition
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
|
||||
a b
|
||||
CREATE TABLE t2 (a VARCHAR(1), b VARCHAR(10));
|
||||
@ -4421,14 +4421,14 @@ CREATE INDEX I2 ON t2 (b);
|
||||
EXPLAIN SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 index I1 I1 4 NULL 2 Using where; Using index; LooseScan
|
||||
1 PRIMARY t2 ref I2 I2 13 test.t2.a 2 Using index condition
|
||||
1 PRIMARY t2 ref I2 I2 13 test.t2.a 1 Using index condition
|
||||
SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
|
||||
a b
|
||||
EXPLAIN
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index I1 I1 2 NULL 2 Using where; Using index; LooseScan
|
||||
1 PRIMARY t1 ref I2 I2 13 test.t1.a 2 Using index condition
|
||||
1 PRIMARY t1 ref I2 I2 13 test.t1.a 1 Using index condition
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500);
|
||||
a b
|
||||
DROP TABLE t1,t2;
|
||||
@ -6656,7 +6656,7 @@ SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquer
|
||||
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index NULL a 4 NULL 2 Using where; Using index
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 4 func 2 Using index
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 4 func 1 Using index
|
||||
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
|
||||
a
|
||||
2009-01-01
|
||||
@ -6859,7 +6859,7 @@ FROM t1 AS alias1, t1 AS alias2, t1 AS alias3
|
||||
WHERE alias1.a = alias2.a OR ('Moscow') IN ( SELECT a FROM t1 );
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY alias1 index a a 19 NULL 11 Using where; Using index
|
||||
1 PRIMARY alias2 ref a a 19 test.alias1.a 2 Using index
|
||||
1 PRIMARY alias2 ref a a 19 test.alias1.a 1 Using index
|
||||
1 PRIMARY alias3 index NULL a 19 NULL 11 Using index; Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY t1 index_subquery a a 19 const 1 Using index; Using where
|
||||
SELECT MAX( alias2.a )
|
||||
@ -7009,7 +7009,7 @@ WHERE SLEEP(0.1) OR c < 'p' OR b = ( SELECT MIN(b) FROM t2 );
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 system NULL NULL NULL NULL 1
|
||||
1 PRIMARY t2 ALL b NULL NULL NULL 2 Using where
|
||||
1 PRIMARY t3 ref d d 5 test.t2.b 2 Using index
|
||||
1 PRIMARY t3 ref d d 5 test.t2.b 1 Using index
|
||||
3 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
set @tmp_mdev410=@@global.userstat;
|
||||
set global userstat=on;
|
||||
@ -7041,7 +7041,7 @@ EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP B
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
||||
2 SUBQUERY t1 range a a 5 NULL 2 Using where; Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 1 Using index
|
||||
DROP TABLE t1,t2;
|
||||
#
|
||||
# MDEV-435: Expensive subqueries may be evaluated during optimization in merge_key_fields
|
||||
@ -7074,7 +7074,7 @@ EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP B
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
||||
2 SUBQUERY t1 range a a 5 NULL 2 Using where; Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 1 Using index
|
||||
DROP TABLE t1,t2;
|
||||
#
|
||||
# MDEV-5991: crash in Item_field::used_tables
|
||||
|
||||
@ -1509,7 +1509,7 @@ explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 index NULL a 5 NULL 4 100.00 Using where; Using index
|
||||
2 DEPENDENT SUBQUERY t1 ref a a 5 func 1001 100.00 Using index
|
||||
2 DEPENDENT SUBQUERY t3 index a a 5 NULL 3 66.67 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY t3 index a a 5 NULL 3 33.33 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` where <in_optimizer>(`test`.`t2`.`a`,<exists>(/* select#2 */ select `test`.`t1`.`a` from `test`.`t1` join `test`.`t3` where `test`.`t3`.`a` = `test`.`t1`.`b` and <cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`))
|
||||
select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
|
||||
@ -4407,7 +4407,7 @@ CREATE INDEX I2 ON t1 (b);
|
||||
EXPLAIN SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery I1 I1 2 func 2 Using index; Using where
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery I1 I1 2 func 1 Using index; Using where
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
|
||||
a b
|
||||
CREATE TABLE t2 (a VARCHAR(1), b VARCHAR(10));
|
||||
@ -4417,14 +4417,14 @@ CREATE INDEX I2 ON t2 (b);
|
||||
EXPLAIN SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where
|
||||
2 DEPENDENT SUBQUERY t2 index_subquery I1 I1 4 func 2 Using index; Using where
|
||||
2 DEPENDENT SUBQUERY t2 index_subquery I1 I1 4 func 1 Using index; Using where
|
||||
SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
|
||||
a b
|
||||
EXPLAIN
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery I1 I1 2 func 2 Using index; Using where
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery I1 I1 2 func 1 Using index; Using where
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500);
|
||||
a b
|
||||
DROP TABLE t1,t2;
|
||||
@ -6096,7 +6096,7 @@ WHERE col_varchar_nokey IN
|
||||
(SELECT col_varchar_key FROM it1 WHERE col_int_key IS NULL);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY ot system NULL NULL NULL NULL 1
|
||||
2 DEPENDENT SUBQUERY it1 index_subquery idx_cvk_cik idx_cvk_cik 9 func,const 2 Using index; Using where
|
||||
2 DEPENDENT SUBQUERY it1 index_subquery idx_cvk_cik idx_cvk_cik 9 func,const 1 Using index; Using where
|
||||
SELECT col_int_nokey FROM ot
|
||||
WHERE col_varchar_nokey IN
|
||||
(SELECT col_varchar_key FROM it1 WHERE col_int_key IS NULL);
|
||||
@ -6652,7 +6652,7 @@ SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquer
|
||||
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index NULL a 4 NULL 2 Using where; Using index
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 4 func 2 Using index
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 4 func 1 Using index
|
||||
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
|
||||
a
|
||||
2009-01-01
|
||||
@ -6855,7 +6855,7 @@ FROM t1 AS alias1, t1 AS alias2, t1 AS alias3
|
||||
WHERE alias1.a = alias2.a OR ('Moscow') IN ( SELECT a FROM t1 );
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY alias1 index a a 19 NULL 11 Using where; Using index
|
||||
1 PRIMARY alias2 ref a a 19 test.alias1.a 2 Using index
|
||||
1 PRIMARY alias2 ref a a 19 test.alias1.a 1 Using index
|
||||
1 PRIMARY alias3 index NULL a 19 NULL 11 Using index; Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY t1 index_subquery a a 19 const 1 Using index; Using where
|
||||
SELECT MAX( alias2.a )
|
||||
@ -7006,7 +7006,7 @@ WHERE SLEEP(0.1) OR c < 'p' OR b = ( SELECT MIN(b) FROM t2 );
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 system NULL NULL NULL NULL 1
|
||||
1 PRIMARY t2 ALL b NULL NULL NULL 2 Using where
|
||||
1 PRIMARY t3 ref d d 5 test.t2.b 2 Using index
|
||||
1 PRIMARY t3 ref d d 5 test.t2.b 1 Using index
|
||||
3 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
set @tmp_mdev410=@@global.userstat;
|
||||
set global userstat=on;
|
||||
@ -7038,7 +7038,7 @@ EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP B
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
||||
2 SUBQUERY t1 range a a 5 NULL 2 Using where; Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 1 Using index
|
||||
DROP TABLE t1,t2;
|
||||
#
|
||||
# MDEV-435: Expensive subqueries may be evaluated during optimization in merge_key_fields
|
||||
@ -7072,7 +7072,7 @@ EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP B
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
||||
2 SUBQUERY t1 range a a 5 NULL 2 Using where; Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 1 Using index
|
||||
DROP TABLE t1,t2;
|
||||
#
|
||||
# MDEV-5991: crash in Item_field::used_tables
|
||||
|
||||
@ -351,7 +351,7 @@ patient_uq clinic_uq
|
||||
explain extended select * from t6 where exists (select * from t7 where uq = clinic_uq);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t7 index PRIMARY PRIMARY 4 NULL 2 100.00 Using index
|
||||
1 PRIMARY t6 ref i1 i1 5 test.t7.uq 2 100.00
|
||||
1 PRIMARY t6 ref i1 i1 5 test.t7.uq 1 100.00
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t6.clinic_uq' of SELECT #2 was resolved in SELECT #1
|
||||
Note 1003 select `test`.`t6`.`patient_uq` AS `patient_uq`,`test`.`t6`.`clinic_uq` AS `clinic_uq` from `test`.`t7` join `test`.`t6` where `test`.`t6`.`clinic_uq` = `test`.`t7`.`uq`
|
||||
@ -4414,7 +4414,7 @@ CREATE INDEX I2 ON t1 (b);
|
||||
EXPLAIN SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index I1 I1 2 NULL 2 Using where; Using index; LooseScan
|
||||
1 PRIMARY t1 ref I2 I2 13 test.t1.a 2 Using index condition
|
||||
1 PRIMARY t1 ref I2 I2 13 test.t1.a 1 Using index condition
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
|
||||
a b
|
||||
CREATE TABLE t2 (a VARCHAR(1), b VARCHAR(10));
|
||||
@ -4424,14 +4424,14 @@ CREATE INDEX I2 ON t2 (b);
|
||||
EXPLAIN SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 index I1 I1 4 NULL 2 Using where; Using index; LooseScan
|
||||
1 PRIMARY t2 ref I2 I2 13 test.t2.a 2 Using index condition
|
||||
1 PRIMARY t2 ref I2 I2 13 test.t2.a 1 Using index condition
|
||||
SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
|
||||
a b
|
||||
EXPLAIN
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index I1 I1 2 NULL 2 Using where; Using index; LooseScan
|
||||
1 PRIMARY t1 ref I2 I2 13 test.t1.a 2 Using index condition
|
||||
1 PRIMARY t1 ref I2 I2 13 test.t1.a 1 Using index condition
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500);
|
||||
a b
|
||||
DROP TABLE t1,t2;
|
||||
@ -6663,7 +6663,7 @@ SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquer
|
||||
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index NULL a 4 NULL 2 Using where; Using index
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 4 func 2 Using index
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 4 func 1 Using index
|
||||
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
|
||||
a
|
||||
2009-01-01
|
||||
@ -6866,7 +6866,7 @@ FROM t1 AS alias1, t1 AS alias2, t1 AS alias3
|
||||
WHERE alias1.a = alias2.a OR ('Moscow') IN ( SELECT a FROM t1 );
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY alias1 index a a 19 NULL 11 Using where; Using index
|
||||
1 PRIMARY alias2 ref a a 19 test.alias1.a 2 Using index
|
||||
1 PRIMARY alias2 ref a a 19 test.alias1.a 1 Using index
|
||||
1 PRIMARY alias3 index NULL a 19 NULL 11 Using index; Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY t1 index_subquery a a 19 const 1 Using index; Using where
|
||||
SELECT MAX( alias2.a )
|
||||
@ -7017,7 +7017,7 @@ WHERE SLEEP(0.1) OR c < 'p' OR b = ( SELECT MIN(b) FROM t2 );
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 system NULL NULL NULL NULL 1
|
||||
1 PRIMARY t2 ALL b NULL NULL NULL 2 Using where
|
||||
1 PRIMARY t3 ref d d 5 test.t2.b 2 Using index
|
||||
1 PRIMARY t3 ref d d 5 test.t2.b 1 Using index
|
||||
3 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
set @tmp_mdev410=@@global.userstat;
|
||||
set global userstat=on;
|
||||
@ -7049,7 +7049,7 @@ EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP B
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
||||
2 SUBQUERY t1 range a a 5 NULL 2 Using where; Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 1 Using index
|
||||
DROP TABLE t1,t2;
|
||||
#
|
||||
# MDEV-435: Expensive subqueries may be evaluated during optimization in merge_key_fields
|
||||
@ -7083,7 +7083,7 @@ EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP B
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
||||
2 SUBQUERY t1 range a a 5 NULL 2 Using where; Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 1 Using index
|
||||
DROP TABLE t1,t2;
|
||||
#
|
||||
# MDEV-5991: crash in Item_field::used_tables
|
||||
|
||||
@ -929,7 +929,7 @@ explain extended SELECT t1.a, t1.a in (select t2.a from t2,t3 where t3.a=t2.a) F
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 index NULL PRIMARY 4 NULL 4 100.00 Using index
|
||||
2 MATERIALIZED t3 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
2 MATERIALIZED t2 ref a a 5 test.t3.a 2 100.00 Using index
|
||||
2 MATERIALIZED t2 ref a a 5 test.t3.a 1 100.00 Using index
|
||||
Warnings:
|
||||
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,<expr_cache><`test`.`t1`.`a`>(<in_optimizer>(`test`.`t1`.`a`,`test`.`t1`.`a` in ( <materialize> (/* select#2 */ select `test`.`t2`.`a` from `test`.`t2` join `test`.`t3` where `test`.`t2`.`a` = `test`.`t3`.`a` ), <primary_index_lookup>(`test`.`t1`.`a` in <temporary table> on distinct_key where `test`.`t1`.`a` = `<subquery2>`.`a`)))) AS `t1.a in (select t2.a from t2,t3 where t3.a=t2.a)` from `test`.`t1`
|
||||
drop table t1,t2,t3;
|
||||
@ -1509,7 +1509,7 @@ explain extended select * from t2 where t2.a in (select t1.a from t1,t3 where t1
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 index NULL a 5 NULL 4 100.00 Using where; Using index
|
||||
2 DEPENDENT SUBQUERY t1 ref a a 5 func 1001 100.00 Using index
|
||||
2 DEPENDENT SUBQUERY t3 index a a 5 NULL 3 66.67 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY t3 index a a 5 NULL 3 33.33 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
Warnings:
|
||||
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a` from `test`.`t2` where <expr_cache><`test`.`t2`.`a`>(<in_optimizer>(`test`.`t2`.`a`,<exists>(/* select#2 */ select `test`.`t1`.`a` from `test`.`t1` join `test`.`t3` where `test`.`t3`.`a` = `test`.`t1`.`b` and <cache>(`test`.`t2`.`a`) = `test`.`t1`.`a`)))
|
||||
select * from t2 where t2.a in (select t1.a from t1,t3 where t1.b=t3.a);
|
||||
@ -4407,7 +4407,7 @@ CREATE INDEX I2 ON t1 (b);
|
||||
EXPLAIN SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery I1 I1 2 func 2 Using index; Using where
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery I1 I1 2 func 1 Using index; Using where
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1);
|
||||
a b
|
||||
CREATE TABLE t2 (a VARCHAR(1), b VARCHAR(10));
|
||||
@ -4417,14 +4417,14 @@ CREATE INDEX I2 ON t2 (b);
|
||||
EXPLAIN SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where
|
||||
2 DEPENDENT SUBQUERY t2 index_subquery I1 I1 4 func 2 Using index; Using where
|
||||
2 DEPENDENT SUBQUERY t2 index_subquery I1 I1 4 func 1 Using index; Using where
|
||||
SELECT a,b FROM t2 WHERE b IN (SELECT a FROM t2);
|
||||
a b
|
||||
EXPLAIN
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery I1 I1 2 func 2 Using index; Using where
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery I1 I1 2 func 1 Using index; Using where
|
||||
SELECT a,b FROM t1 WHERE b IN (SELECT a FROM t1 WHERE LENGTH(a)<500);
|
||||
a b
|
||||
DROP TABLE t1,t2;
|
||||
@ -6096,7 +6096,7 @@ WHERE col_varchar_nokey IN
|
||||
(SELECT col_varchar_key FROM it1 WHERE col_int_key IS NULL);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY ot system NULL NULL NULL NULL 1
|
||||
2 DEPENDENT SUBQUERY it1 index_subquery idx_cvk_cik idx_cvk_cik 9 func,const 2 Using index; Using where
|
||||
2 DEPENDENT SUBQUERY it1 index_subquery idx_cvk_cik idx_cvk_cik 9 func,const 1 Using index; Using where
|
||||
SELECT col_int_nokey FROM ot
|
||||
WHERE col_varchar_nokey IN
|
||||
(SELECT col_varchar_key FROM it1 WHERE col_int_key IS NULL);
|
||||
@ -6652,7 +6652,7 @@ SET @@optimizer_switch='semijoin=off,materialization=off,in_to_exists=on,subquer
|
||||
EXPLAIN SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index NULL a 4 NULL 2 Using where; Using index
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 4 func 2 Using index
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 4 func 1 Using index
|
||||
SELECT * FROM t1 WHERE a IN (SELECT a AS field1 FROM t1 GROUP BY field1);
|
||||
a
|
||||
2009-01-01
|
||||
@ -6855,7 +6855,7 @@ FROM t1 AS alias1, t1 AS alias2, t1 AS alias3
|
||||
WHERE alias1.a = alias2.a OR ('Moscow') IN ( SELECT a FROM t1 );
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY alias1 index a a 19 NULL 11 Using where; Using index
|
||||
1 PRIMARY alias2 ref a a 19 test.alias1.a 2 Using index
|
||||
1 PRIMARY alias2 ref a a 19 test.alias1.a 1 Using index
|
||||
1 PRIMARY alias3 index NULL a 19 NULL 11 Using index; Using join buffer (flat, BNL join)
|
||||
2 SUBQUERY t1 index_subquery a a 19 const 1 Using index; Using where
|
||||
SELECT MAX( alias2.a )
|
||||
@ -7006,7 +7006,7 @@ WHERE SLEEP(0.1) OR c < 'p' OR b = ( SELECT MIN(b) FROM t2 );
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 system NULL NULL NULL NULL 1
|
||||
1 PRIMARY t2 ALL b NULL NULL NULL 2 Using where
|
||||
1 PRIMARY t3 ref d d 5 test.t2.b 2 Using index
|
||||
1 PRIMARY t3 ref d d 5 test.t2.b 1 Using index
|
||||
3 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
||||
set @tmp_mdev410=@@global.userstat;
|
||||
set global userstat=on;
|
||||
@ -7038,7 +7038,7 @@ EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP B
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
||||
2 SUBQUERY t1 range a a 5 NULL 2 Using where; Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 1 Using index
|
||||
DROP TABLE t1,t2;
|
||||
#
|
||||
# MDEV-435: Expensive subqueries may be evaluated during optimization in merge_key_fields
|
||||
@ -7072,7 +7072,7 @@ EXPLAIN SELECT * FROM t1 WHERE EXISTS ( SELECT a FROM t1, t2 WHERE b = a GROUP B
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
|
||||
2 SUBQUERY t1 range a a 5 NULL 2 Using where; Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 2 Using index
|
||||
2 SUBQUERY t2 ref b b 5 test.t1.a 1 Using index
|
||||
DROP TABLE t1,t2;
|
||||
#
|
||||
# MDEV-5991: crash in Item_field::used_tables
|
||||
|
||||
@ -502,7 +502,7 @@ EXPLAIN EXTENDED SELECT vkey FROM t0 WHERE pk IN
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t0 ALL PRIMARY NULL NULL NULL 5 100.00
|
||||
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t0.pk 1 100.00 Using where
|
||||
1 PRIMARY t2 ref vkey vkey 4 test.t1.vnokey 2 50.00 Using index; FirstMatch(t1)
|
||||
1 PRIMARY t2 ref vkey vkey 4 test.t1.vnokey 1 100.00 Using index; FirstMatch(t1)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`vkey` AS `vkey` from `test`.`t0` `t1` semi join (`test`.`t0` `t2`) join `test`.`t0` where `test`.`t1`.`pk` = `test`.`t0`.`pk` and `test`.`t2`.`vkey` = `test`.`t1`.`vnokey`
|
||||
SELECT vkey FROM t0 WHERE pk IN
|
||||
@ -2154,7 +2154,7 @@ explain
|
||||
SELECT * FROM t1, t2 WHERE (t2.a , t1.b) IN (SELECT a, b FROM t3);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
|
||||
1 PRIMARY t3 ref b b 5 test.t1.b 2 Using where; Start temporary
|
||||
1 PRIMARY t3 ref b b 5 test.t1.b 1 Using where; Start temporary
|
||||
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t3.a 1 Using index; End temporary
|
||||
SELECT * FROM t1, t2 WHERE (t2.a , t1.b) IN (SELECT a, b FROM t3);
|
||||
b a
|
||||
@ -2179,7 +2179,7 @@ explain
|
||||
SELECT * FROM t3 WHERE t3.a IN (SELECT t5.a FROM t2, t4, t5 WHERE t2.c = t5.a AND t2.b = t5.b);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t5 index a a 10 NULL 2 Using where; Using index; Start temporary
|
||||
1 PRIMARY t2 ref b b 5 test.t5.b 2 Using where
|
||||
1 PRIMARY t2 ref b b 5 test.t5.b 1 Using where
|
||||
1 PRIMARY t4 ALL NULL NULL NULL NULL 3
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 15 Using where; End temporary; Using join buffer (flat, BNL join)
|
||||
SELECT * FROM t3 WHERE t3.a IN (SELECT t5.a FROM t2, t4, t5 WHERE t2.c = t5.a AND t2.b = t5.b);
|
||||
@ -2436,9 +2436,9 @@ SET SESSION optimizer_switch='loosescan=off';
|
||||
EXPLAIN
|
||||
SELECT * FROM t1 WHERE a IN (SELECT t2.a FROM t2,t3 WHERE t2.b = t3.b);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
|
||||
1 PRIMARY t2 range idx idx 4 NULL 2 Using where; Using index
|
||||
1 PRIMARY t3 ref idx idx 4 test.t2.b 1 Using index; FirstMatch(t1)
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
|
||||
1 PRIMARY t3 range idx idx 4 NULL 2 Using where; Using index
|
||||
1 PRIMARY t2 ref idx idx 9 test.t3.b,test.t1.a 1 Using index; FirstMatch(t1)
|
||||
SELECT * FROM t1 WHERE a IN (SELECT t2.a FROM t2,t3 WHERE t2.b = t3.b);
|
||||
a
|
||||
5
|
||||
@ -2446,9 +2446,9 @@ SET SESSION optimizer_switch='loosescan=on';
|
||||
EXPLAIN
|
||||
SELECT * FROM t1 WHERE a IN (SELECT t2.a FROM t2,t3 WHERE t2.b = t3.b);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
|
||||
1 PRIMARY t2 range idx idx 4 NULL 2 Using where; Using index
|
||||
1 PRIMARY t3 ref idx idx 4 test.t2.b 1 Using index; FirstMatch(t1)
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
|
||||
1 PRIMARY t3 range idx idx 4 NULL 2 Using where; Using index
|
||||
1 PRIMARY t2 ref idx idx 9 test.t3.b,test.t1.a 1 Using index; FirstMatch(t1)
|
||||
SELECT * FROM t1 WHERE a IN (SELECT t2.a FROM t2,t3 WHERE t2.b = t3.b);
|
||||
a
|
||||
5
|
||||
@ -2561,7 +2561,7 @@ INSERT INTO t1 VALUES
|
||||
(6,3),(7,1),(8,4),(9,3),(10,2);
|
||||
CREATE TABLE t2 ( c INT, d INT, KEY(c) );
|
||||
INSERT INTO t2 VALUES
|
||||
(1,2),(2,1),(3,3),(4,2),(5,5),(6,3),(7,1);
|
||||
(1,2),(2,1),(3,3),(4,2),(5,5),(6,3),(7,1),(11,11);
|
||||
analyze table t1,t2;
|
||||
Table Op Msg_type Msg_text
|
||||
test.t1 analyze status Engine-independent statistics collected
|
||||
@ -2571,15 +2571,15 @@ test.t2 analyze status OK
|
||||
explain
|
||||
SELECT a, b, d FROM t1, t2
|
||||
WHERE ( b, d ) IN
|
||||
( SELECT b, d FROM t1, t2 WHERE b = c );
|
||||
( SELECT b, d FROM t1 as t3, t2 as t4 WHERE b = c );
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index b b 5 NULL 10 Using where; Using index; Start temporary
|
||||
1 PRIMARY t2 ref c c 5 test.t1.b 1
|
||||
1 PRIMARY t3 index b b 5 NULL 10 Using where; Using index; Start temporary
|
||||
1 PRIMARY t4 ref c c 5 test.t3.b 1
|
||||
1 PRIMARY t1 ALL b NULL NULL NULL 10 Using where; Using join buffer (flat, BNL join)
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 7 Using where; End temporary; Using join buffer (flat, BNL join)
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 8 Using where; End temporary; Using join buffer (flat, BNL join)
|
||||
SELECT a, b, d FROM t1, t2
|
||||
WHERE ( b, d ) IN
|
||||
( SELECT b, d FROM t1, t2 WHERE b = c );
|
||||
( SELECT b, d FROM t1 as t3, t2 as t4 WHERE b = c );
|
||||
a b d
|
||||
1 2 1
|
||||
1 2 1
|
||||
@ -2768,7 +2768,7 @@ WHERE (t1_1.a, t1_2.a) IN ( SELECT a, b FROM v1 );
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1_1 ALL NULL NULL NULL NULL 11 Using where
|
||||
1 PRIMARY t1_2 ALL NULL NULL NULL NULL 11
|
||||
1 PRIMARY <derived3> ref key0 key0 5 test.t1_1.a 2 Using where; FirstMatch(t1_2)
|
||||
1 PRIMARY <derived3> ref key0 key0 5 test.t1_1.a 1 Using where; FirstMatch(t1_2)
|
||||
3 DERIVED t1 ALL NULL NULL NULL NULL 11
|
||||
SELECT * FROM t1 AS t1_1, t1 AS t1_2
|
||||
WHERE (t1_1.a, t1_2.a) IN ( SELECT a, b FROM v1 );
|
||||
|
||||
@ -2292,17 +2292,17 @@ INSERT INTO t1 VALUES
|
||||
|
||||
CREATE TABLE t2 ( c INT, d INT, KEY(c) );
|
||||
INSERT INTO t2 VALUES
|
||||
(1,2),(2,1),(3,3),(4,2),(5,5),(6,3),(7,1);
|
||||
(1,2),(2,1),(3,3),(4,2),(5,5),(6,3),(7,1),(11,11);
|
||||
|
||||
analyze table t1,t2;
|
||||
explain
|
||||
SELECT a, b, d FROM t1, t2
|
||||
WHERE ( b, d ) IN
|
||||
( SELECT b, d FROM t1, t2 WHERE b = c );
|
||||
( SELECT b, d FROM t1 as t3, t2 as t4 WHERE b = c );
|
||||
--sorted_result
|
||||
SELECT a, b, d FROM t1, t2
|
||||
WHERE ( b, d ) IN
|
||||
( SELECT b, d FROM t1, t2 WHERE b = c );
|
||||
( SELECT b, d FROM t1 as t3, t2 as t4 WHERE b = c );
|
||||
|
||||
DROP TABLE t1, t2;
|
||||
|
||||
|
||||
@ -513,7 +513,7 @@ EXPLAIN EXTENDED SELECT vkey FROM t0 WHERE pk IN
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t0 ALL PRIMARY NULL NULL NULL 5 100.00
|
||||
1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t0.pk 1 100.00 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 PRIMARY t2 ref vkey vkey 4 test.t1.vnokey 2 50.00 Using index; FirstMatch(t1)
|
||||
1 PRIMARY t2 ref vkey vkey 4 test.t1.vnokey 1 100.00 Using index; FirstMatch(t1)
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t0`.`vkey` AS `vkey` from `test`.`t0` `t1` semi join (`test`.`t0` `t2`) join `test`.`t0` where `test`.`t1`.`pk` = `test`.`t0`.`pk` and `test`.`t2`.`vkey` = `test`.`t1`.`vnokey`
|
||||
SELECT vkey FROM t0 WHERE pk IN
|
||||
@ -2160,7 +2160,7 @@ explain
|
||||
SELECT * FROM t1, t2 WHERE (t2.a , t1.b) IN (SELECT a, b FROM t3);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
|
||||
1 PRIMARY t3 ref b b 5 test.t1.b 2 Using where; Start temporary; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 PRIMARY t3 ref b b 5 test.t1.b 1 Using where; Start temporary; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t3.a 1 Using index; End temporary
|
||||
SELECT * FROM t1, t2 WHERE (t2.a , t1.b) IN (SELECT a, b FROM t3);
|
||||
b a
|
||||
@ -2185,7 +2185,7 @@ explain
|
||||
SELECT * FROM t3 WHERE t3.a IN (SELECT t5.a FROM t2, t4, t5 WHERE t2.c = t5.a AND t2.b = t5.b);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t5 index a a 10 NULL 2 Using where; Using index; Start temporary
|
||||
1 PRIMARY t2 ref b b 5 test.t5.b 2 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 PRIMARY t2 ref b b 5 test.t5.b 1 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 PRIMARY t4 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 15 Using where; End temporary; Using join buffer (incremental, BNL join)
|
||||
SELECT * FROM t3 WHERE t3.a IN (SELECT t5.a FROM t2, t4, t5 WHERE t2.c = t5.a AND t2.b = t5.b);
|
||||
@ -2442,9 +2442,9 @@ SET SESSION optimizer_switch='loosescan=off';
|
||||
EXPLAIN
|
||||
SELECT * FROM t1 WHERE a IN (SELECT t2.a FROM t2,t3 WHERE t2.b = t3.b);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
|
||||
1 PRIMARY t2 range idx idx 4 NULL 2 Using where; Using index
|
||||
1 PRIMARY t3 ref idx idx 4 test.t2.b 1 Using index; FirstMatch(t1)
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
|
||||
1 PRIMARY t3 range idx idx 4 NULL 2 Using where; Using index
|
||||
1 PRIMARY t2 ref idx idx 9 test.t3.b,test.t1.a 1 Using index; FirstMatch(t1)
|
||||
SELECT * FROM t1 WHERE a IN (SELECT t2.a FROM t2,t3 WHERE t2.b = t3.b);
|
||||
a
|
||||
5
|
||||
@ -2452,9 +2452,9 @@ SET SESSION optimizer_switch='loosescan=on';
|
||||
EXPLAIN
|
||||
SELECT * FROM t1 WHERE a IN (SELECT t2.a FROM t2,t3 WHERE t2.b = t3.b);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4
|
||||
1 PRIMARY t2 range idx idx 4 NULL 2 Using where; Using index
|
||||
1 PRIMARY t3 ref idx idx 4 test.t2.b 1 Using index; FirstMatch(t1)
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where
|
||||
1 PRIMARY t3 range idx idx 4 NULL 2 Using where; Using index
|
||||
1 PRIMARY t2 ref idx idx 9 test.t3.b,test.t1.a 1 Using index; FirstMatch(t1)
|
||||
SELECT * FROM t1 WHERE a IN (SELECT t2.a FROM t2,t3 WHERE t2.b = t3.b);
|
||||
a
|
||||
5
|
||||
@ -2567,7 +2567,7 @@ INSERT INTO t1 VALUES
|
||||
(6,3),(7,1),(8,4),(9,3),(10,2);
|
||||
CREATE TABLE t2 ( c INT, d INT, KEY(c) );
|
||||
INSERT INTO t2 VALUES
|
||||
(1,2),(2,1),(3,3),(4,2),(5,5),(6,3),(7,1);
|
||||
(1,2),(2,1),(3,3),(4,2),(5,5),(6,3),(7,1),(11,11);
|
||||
analyze table t1,t2;
|
||||
Table Op Msg_type Msg_text
|
||||
test.t1 analyze status Engine-independent statistics collected
|
||||
@ -2577,15 +2577,15 @@ test.t2 analyze status OK
|
||||
explain
|
||||
SELECT a, b, d FROM t1, t2
|
||||
WHERE ( b, d ) IN
|
||||
( SELECT b, d FROM t1, t2 WHERE b = c );
|
||||
( SELECT b, d FROM t1 as t3, t2 as t4 WHERE b = c );
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 index b b 5 NULL 10 Using where; Using index; Start temporary
|
||||
1 PRIMARY t2 ref c c 5 test.t1.b 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 PRIMARY t3 index b b 5 NULL 10 Using where; Using index; Start temporary
|
||||
1 PRIMARY t4 ref c c 5 test.t3.b 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 PRIMARY t1 ALL b NULL NULL NULL 10 Using where; Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 7 Using where; End temporary; Using join buffer (incremental, BNL join)
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 8 Using where; End temporary; Using join buffer (incremental, BNL join)
|
||||
SELECT a, b, d FROM t1, t2
|
||||
WHERE ( b, d ) IN
|
||||
( SELECT b, d FROM t1, t2 WHERE b = c );
|
||||
( SELECT b, d FROM t1 as t3, t2 as t4 WHERE b = c );
|
||||
a b d
|
||||
1 2 1
|
||||
1 2 1
|
||||
@ -2774,7 +2774,7 @@ WHERE (t1_1.a, t1_2.a) IN ( SELECT a, b FROM v1 );
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1_1 ALL NULL NULL NULL NULL 11 Using where
|
||||
1 PRIMARY t1_2 ALL NULL NULL NULL NULL 11
|
||||
1 PRIMARY <derived3> ref key0 key0 5 test.t1_1.a 2 Using where; FirstMatch(t1_2)
|
||||
1 PRIMARY <derived3> ref key0 key0 5 test.t1_1.a 1 Using where; FirstMatch(t1_2)
|
||||
3 DERIVED t1 ALL NULL NULL NULL NULL 11
|
||||
SELECT * FROM t1 AS t1_1, t1 AS t1_2
|
||||
WHERE (t1_1.a, t1_2.a) IN ( SELECT a, b FROM v1 );
|
||||
@ -3485,8 +3485,8 @@ SELECT * FROM t1 LEFT JOIN t2 ON (c = b)
|
||||
WHERE (a, b) IN (SELECT a, b FROM t1 t) having t1.a !='z';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL idx_a NULL NULL NULL 23
|
||||
1 PRIMARY t2 ref idx_c idx_c 4 test.t1.b 1 Using where; Using index
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
|
||||
1 PRIMARY t2 ref idx_c idx_c 4 test.t1.b 2 Using where; Using index
|
||||
2 MATERIALIZED t ALL idx_a NULL NULL NULL 23
|
||||
SELECT * FROM t1 LEFT JOIN t2 ON (c = b)
|
||||
WHERE (a, b) IN (SELECT a, b FROM t1 t) having t1.a !='z';
|
||||
@ -3499,9 +3499,10 @@ EXPLAIN
|
||||
SELECT * FROM t1 LEFT JOIN t3 ON (c = b)
|
||||
WHERE (a, b) IN (SELECT a, b FROM t1 t) having t1.a !='z';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t ALL idx_a NULL NULL NULL 23 Using where; Start temporary
|
||||
1 PRIMARY t1 ref idx_a idx_a 4 test.t.a 2 Using where; End temporary
|
||||
1 PRIMARY t3 ref idx_c idx_c 4 test.t.b 2 Using where
|
||||
1 PRIMARY t1 ALL idx_a NULL NULL NULL 23
|
||||
1 PRIMARY t3 ref idx_c idx_c 4 test.t1.b 1 Using where
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
|
||||
2 MATERIALIZED t ALL idx_a NULL NULL NULL 23
|
||||
SELECT * FROM t1 LEFT JOIN t3 ON (c = b)
|
||||
WHERE (a, b) IN (SELECT a, b FROM t1 t) having t1.a !='z';
|
||||
a b c d
|
||||
@ -3515,8 +3516,8 @@ SELECT * FROM t1 LEFT JOIN t2 ON (c = b)
|
||||
WHERE (a, b) IN (SELECT a, b FROM t1 t) having t1.a !='z';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL idx_a NULL NULL NULL 23
|
||||
1 PRIMARY t2 ref idx_c idx_c 4 test.t1.b 1 Using where; Using index
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
|
||||
1 PRIMARY t2 ref idx_c idx_c 4 test.t1.b 2 Using where; Using index
|
||||
2 MATERIALIZED t ALL idx_a NULL NULL NULL 23
|
||||
SELECT * FROM t1 LEFT JOIN t2 ON (c = b)
|
||||
WHERE (a, b) IN (SELECT a, b FROM t1 t) having t1.a !='z';
|
||||
@ -3529,9 +3530,10 @@ EXPLAIN
|
||||
SELECT * FROM t1 LEFT JOIN t3 ON (c = b)
|
||||
WHERE (a, b) IN (SELECT a, b FROM t1 t) having t1.a !='z';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t ALL idx_a NULL NULL NULL 23 Start temporary
|
||||
1 PRIMARY t1 ALL idx_a NULL NULL NULL 23 Using where; End temporary; Using join buffer (flat, BNL join)
|
||||
1 PRIMARY t3 ref idx_c idx_c 4 test.t.b 2 Using where; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 PRIMARY t1 ALL idx_a NULL NULL NULL 23
|
||||
1 PRIMARY t3 ref idx_c idx_c 4 test.t1.b 1 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
|
||||
2 MATERIALIZED t ALL idx_a NULL NULL NULL 23
|
||||
SELECT * FROM t1 LEFT JOIN t3 ON (c = b)
|
||||
WHERE (a, b) IN (SELECT a, b FROM t1 t) having t1.a !='z';
|
||||
a b c d
|
||||
@ -3560,9 +3562,8 @@ SELECT a FROM t1 t WHERE a IN (SELECT b FROM t1, t2 WHERE b = a)
|
||||
GROUP BY a HAVING a != 'z';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t range idx_a idx_a 4 NULL 3 Using where; Using index
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
|
||||
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2 Using where
|
||||
2 MATERIALIZED t1 ref idx_a idx_a 4 test.t2.b 2 Using index
|
||||
1 PRIMARY t1 ref idx_a idx_a 4 test.t.a 1 Using index
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t)
|
||||
SELECT a FROM t1 t WHERE a IN (SELECT b FROM t1, t2 WHERE b = a)
|
||||
GROUP BY a HAVING a != 'z';
|
||||
a
|
||||
@ -3574,9 +3575,8 @@ SELECT a FROM t1 t WHERE a IN (SELECT b FROM t1, t2 WHERE b = a)
|
||||
GROUP BY a HAVING a != 'z';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t range idx_a idx_a 4 NULL 3 Using where; Using index
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
|
||||
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2 Using where
|
||||
2 MATERIALIZED t1 ref idx_a idx_a 4 test.t2.b 2 Using index
|
||||
1 PRIMARY t1 ref idx_a idx_a 4 test.t.a 1 Using index
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; FirstMatch(t)
|
||||
SELECT a FROM t1 t WHERE a IN (SELECT b FROM t1, t2 WHERE b = a)
|
||||
GROUP BY a HAVING a != 'z';
|
||||
a
|
||||
|
||||
@ -1141,7 +1141,7 @@ explain extended
|
||||
select a from t1 where a in (select c from t2 where d >= 20);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 6 100.00 Using where; Start temporary
|
||||
1 PRIMARY t1 ref it1a it1a 4 test.t2.c 2 16.67 Using index; End temporary
|
||||
1 PRIMARY t1 ref it1a it1a 4 test.t2.c 1 16.67 Using index; End temporary
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t1`.`a` = `test`.`t2`.`c` and `test`.`t2`.`d` >= 20
|
||||
select a from t1 where a in (select c from t2 where d >= 20);
|
||||
@ -1155,7 +1155,7 @@ explain extended
|
||||
select a from t1 where a in (select c from t2 where d >= 20);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 7 100.00 Using where; Start temporary
|
||||
1 PRIMARY t1 ref it1a it1a 4 test.t2.c 2 14.29 Using index; End temporary
|
||||
1 PRIMARY t1 ref it1a it1a 4 test.t2.c 1 14.29 Using index; End temporary
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where `test`.`t1`.`a` = `test`.`t2`.`c` and `test`.`t2`.`d` >= 20
|
||||
select a from t1 where a in (select c from t2 where d >= 20);
|
||||
@ -1208,7 +1208,7 @@ select a from t1
|
||||
where a in (select c from t2 where d >= some(select e from t3 where b=e));
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 7 100.00 Start temporary
|
||||
1 PRIMARY t1 ref it1a,iab iab 4 test.t2.c 1 14.29 Using where; Using index; End temporary
|
||||
1 PRIMARY t1 ref it1a,iab iab 4 test.t2.c 1 9.41 Using where; Using index; End temporary
|
||||
3 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t1.b' of SELECT #3 was resolved in SELECT #1
|
||||
@ -2023,10 +2023,9 @@ WHERE (a, c) IN (SELECT s1.b, s1.c FROM t2 AS s1, t2 AS s2
|
||||
WHERE s2.d = s1.e AND s1.e = (SELECT MAX(e) FROM t2));
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 system NULL NULL NULL NULL 1
|
||||
1 PRIMARY t2 index c c 5 NULL 8 Using index
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
|
||||
2 MATERIALIZED s2 ref d d 4 const 2 Using where; Using index
|
||||
2 MATERIALIZED s1 ALL c NULL NULL NULL 8 Using where; Using join buffer (flat, BNL join)
|
||||
1 PRIMARY t2 range c c 5 NULL 8 Using where; Using index
|
||||
1 PRIMARY s1 ref c c 5 test.t2.c 1 Using where
|
||||
1 PRIMARY s2 ref d d 4 const 2 Using where; Using index; FirstMatch(t2)
|
||||
3 SUBQUERY t2 ALL NULL NULL NULL NULL 8
|
||||
SELECT a, c FROM t1, t2
|
||||
WHERE (a, c) IN (SELECT s1.b, s1.c FROM t2 AS s1, t2 AS s2
|
||||
@ -2043,10 +2042,9 @@ WHERE (a, c) IN (SELECT s1.b, s1.c FROM t2 AS s1, t2 AS s2
|
||||
WHERE s2.d = s1.e AND s1.e = (SELECT MAX(e) FROM t2));
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 system NULL NULL NULL NULL 1
|
||||
1 PRIMARY t2 index c c 5 NULL 8 Using index
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1
|
||||
2 MATERIALIZED s2 ref d d 4 const 2 Using where; Using index
|
||||
2 MATERIALIZED s1 hash_ALL c #hash#$hj 5 const 8 Using where; Using join buffer (flat, BNLH join)
|
||||
1 PRIMARY t2 range c c 5 NULL 8 Using where; Using index
|
||||
1 PRIMARY s1 hash_ALL c #hash#c 5 test.t2.c 8 Using where; Using join buffer (flat, BNLH join)
|
||||
1 PRIMARY s2 hash_range d #hash#d:d 4:4 const 2 Using where; Using index; FirstMatch(t2); Using join buffer (incremental, BNLH join)
|
||||
3 SUBQUERY t2 ALL NULL NULL NULL NULL 8
|
||||
SELECT a, c FROM t1, t2
|
||||
WHERE (a, c) IN (SELECT s1.b, s1.c FROM t2 AS s1, t2 AS s2
|
||||
@ -2311,7 +2309,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 Using where
|
||||
2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 8 12.50 Using where; FirstMatch
|
||||
2 DEPENDENT SUBQUERY t2 range i2 i2 5 NULL 3 100.00 Using where; Using index; Using join buffer (flat, BNL join)
|
||||
2 DEPENDENT SUBQUERY t3 ref i3 i3 5 test.t2.i2 2 100.00 Using index
|
||||
2 DEPENDENT SUBQUERY t3 ref i3 i3 5 test.t2.i2 1 100.00 Using index
|
||||
Warnings:
|
||||
Note 1276 Field or reference 'test.t1.f1' of SELECT #2 was resolved in SELECT #1
|
||||
Note 1003 /* select#1 */ select `test`.`t1`.`f1` AS `f1` from `test`.`t1` where <expr_cache><`test`.`t1`.`f1`>(exists(/* select#2 */ select 1 from `test`.`t2` semi join (`test`.`t3`) join `test`.`t3` where `test`.`t3`.`i3` = `test`.`t2`.`i2` and `test`.`t1`.`f1` = `test`.`t3`.`f3` limit 1))
|
||||
|
||||
@ -563,9 +563,9 @@ JOIN t5 ON t4.f3 ON t3.f1 = t5.f5 ON t2.f4 = t3.f4
|
||||
WHERE t3.f2 ;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t3 ALL NULL NULL NULL NULL 2 Using where
|
||||
1 SIMPLE t5 ref f5 f5 5 test.t3.f1 2 Using where; Using index
|
||||
1 SIMPLE t5 ref f5 f5 5 test.t3.f1 1 Using where; Using index
|
||||
1 SIMPLE t4 ALL NULL NULL NULL NULL 3 Using where
|
||||
1 SIMPLE t2 ref f4 f4 1003 test.t3.f4 2 Using where
|
||||
1 SIMPLE t2 ref f4 f4 1003 test.t3.f4 1 Using where
|
||||
# ^^ The above must not produce a QEP of t3,t5,t2,t4
|
||||
# as that violates the "no interleaving of outer join nests" rule.
|
||||
DROP TABLE t1,t2,t3,t4,t5;
|
||||
@ -970,7 +970,7 @@ group by yyy;
|
||||
explain select t1.* from t1 left join v2e on v2e.yyy=t1.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.a 2 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.a 1 Using where
|
||||
2 DERIVED NULL NULL NULL NULL NULL NULL NULL no matching row in const table
|
||||
create table t2 (a int, b int, c int);
|
||||
insert into t2 select A.seq, B.seq, 123 from seq_1_to_3 A, seq_1_to_3 B;
|
||||
@ -980,14 +980,14 @@ explain select t1.* from t1 left join
|
||||
(select a, count(*) as cnt from t2 group by a, b) D on D.a=t1.a;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.a 2 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.t1.a 1 Using where
|
||||
2 DERIVED t2 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort
|
||||
# Still no elimination 'cause field D.b is just an alias for t2.a
|
||||
explain select t1.* from t1 left join
|
||||
(select a, a as b, count(*) as cnt from t2 group by a, b) D on D.a=t1.a and D.b=t1.b;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
|
||||
1 PRIMARY <derived2> ref key0 key0 10 test.t1.a,test.t1.b 2 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 10 test.t1.a,test.t1.b 1 Using where
|
||||
2 DERIVED t2 ALL NULL NULL NULL NULL 9 Using temporary; Using filesort
|
||||
Warnings:
|
||||
Warning 1052 Column 'b' in group statement is ambiguous
|
||||
|
||||
@ -821,7 +821,7 @@ select * from (values (1)) tvc_0);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
|
||||
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
||||
3 DEPENDENT UNION <derived4> ref key0 key0 4 func 2 100.00
|
||||
3 DEPENDENT UNION <derived4> ref key0 key0 4 func 1 100.00
|
||||
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
||||
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
|
||||
Warnings:
|
||||
@ -1054,7 +1054,7 @@ select * from (values (1)) as tvc_0);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
|
||||
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
||||
3 DEPENDENT UNION <derived4> ref key0 key0 4 func 2 100.00
|
||||
3 DEPENDENT UNION <derived4> ref key0 key0 4 func 1 100.00
|
||||
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
||||
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
|
||||
Warnings:
|
||||
@ -1147,7 +1147,7 @@ select * from (values (1)) as tvc_0);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
|
||||
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
||||
3 DEPENDENT UNION <derived4> ref key0 key0 4 func 2 100.00
|
||||
3 DEPENDENT UNION <derived4> ref key0 key0 4 func 1 100.00
|
||||
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
||||
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
|
||||
Warnings:
|
||||
@ -2837,7 +2837,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
6 SUBQUERY <derived2> ALL NULL NULL NULL NULL 2
|
||||
2 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used
|
||||
3 SUBQUERY t3 ALL NULL NULL NULL NULL 11 Using where
|
||||
3 SUBQUERY <derived5> ref key0 key0 8 test.t3.a 2 Using where; FirstMatch(t3)
|
||||
3 SUBQUERY <derived5> ref key0 key0 8 test.t3.a 1 Using where; FirstMatch(t3)
|
||||
5 DERIVED t3 ALL NULL NULL NULL NULL 11 Using temporary; Using filesort
|
||||
prepare stmt from "select
|
||||
(values ((select * from t3 where a in (select * from v1))))";
|
||||
@ -2862,7 +2862,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
6 SUBQUERY <derived2> ALL NULL NULL NULL NULL 2
|
||||
2 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used
|
||||
3 SUBQUERY t3 ALL NULL NULL NULL NULL 11 Using where
|
||||
3 SUBQUERY <derived5> ref key0 key0 8 test.t3.a 2 Using where; FirstMatch(t3)
|
||||
3 SUBQUERY <derived5> ref key0 key0 8 test.t3.a 1 Using where; FirstMatch(t3)
|
||||
5 DERIVED t3 ALL NULL NULL NULL NULL 11 Using temporary; Using filesort
|
||||
prepare stmt from "select
|
||||
(values ((select * from t3
|
||||
|
||||
@ -220,7 +220,7 @@ t1 force INDEX (col_time_key)
|
||||
WHERE col_time_key = col_datetime_key;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 5 100.00 Using where
|
||||
1 SIMPLE t1 ref col_time_key col_time_key 4 test.t2.col_datetime_key 2 100.00 Using where; Using index
|
||||
1 SIMPLE t1 ref col_time_key col_time_key 4 test.t2.col_datetime_key 1 100.00 Using where; Using index
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`col_datetime_key` AS `col_datetime_key`,`test`.`t1`.`col_time_key` AS `col_time_key` from `test`.`t2` IGNORE INDEX (`col_datetime_key`) straight_join `test`.`t1` FORCE INDEX (`col_time_key`) where `test`.`t1`.`col_time_key` = `test`.`t2`.`col_datetime_key`
|
||||
SELECT * FROM
|
||||
@ -241,7 +241,7 @@ t1 force INDEX (col_time_key)
|
||||
WHERE col_datetime_key = col_time_key;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t2 ALL NULL NULL NULL NULL 5 100.00 Using where
|
||||
1 SIMPLE t1 ref col_time_key col_time_key 4 test.t2.col_datetime_key 2 100.00 Using where; Using index
|
||||
1 SIMPLE t1 ref col_time_key col_time_key 4 test.t2.col_datetime_key 1 100.00 Using where; Using index
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`col_datetime_key` AS `col_datetime_key`,`test`.`t1`.`col_time_key` AS `col_time_key` from `test`.`t2` IGNORE INDEX (`col_datetime_key`) straight_join `test`.`t1` FORCE INDEX (`col_time_key`) where `test`.`t2`.`col_datetime_key` = `test`.`t1`.`col_time_key`
|
||||
SELECT * FROM
|
||||
@ -304,7 +304,7 @@ t1 force INDEX (col_time_key)
|
||||
WHERE col_time_key = col_datetime_key;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t2 index col_datetime_key col_datetime_key 6 NULL 5 100.00 Using where; Using index
|
||||
1 SIMPLE t1 ref col_time_key col_time_key 4 test.t2.col_datetime_key 2 100.00 Using where; Using index
|
||||
1 SIMPLE t1 ref col_time_key col_time_key 4 test.t2.col_datetime_key 1 100.00 Using where; Using index
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`col_datetime_key` AS `col_datetime_key`,`test`.`t1`.`col_time_key` AS `col_time_key` from `test`.`t2` FORCE INDEX (`col_datetime_key`) straight_join `test`.`t1` FORCE INDEX (`col_time_key`) where `test`.`t1`.`col_time_key` = `test`.`t2`.`col_datetime_key`
|
||||
SELECT * FROM
|
||||
@ -325,7 +325,7 @@ t1 force INDEX (col_time_key)
|
||||
WHERE col_datetime_key = col_time_key;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t2 index col_datetime_key col_datetime_key 6 NULL 5 100.00 Using where; Using index
|
||||
1 SIMPLE t1 ref col_time_key col_time_key 4 test.t2.col_datetime_key 2 100.00 Using where; Using index
|
||||
1 SIMPLE t1 ref col_time_key col_time_key 4 test.t2.col_datetime_key 1 100.00 Using where; Using index
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`col_datetime_key` AS `col_datetime_key`,`test`.`t1`.`col_time_key` AS `col_time_key` from `test`.`t2` FORCE INDEX (`col_datetime_key`) straight_join `test`.`t1` FORCE INDEX (`col_time_key`) where `test`.`t2`.`col_datetime_key` = `test`.`t1`.`col_time_key`
|
||||
SELECT * FROM
|
||||
|
||||
@ -5489,8 +5489,8 @@ from t1 left join v1 on v1.c=t1.b
|
||||
where t1.a < 5;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t1 range a a 5 NULL 3 100.00 Using index condition
|
||||
1 SIMPLE t2 ref c c 5 test.t1.b 2 100.00 Using where
|
||||
1 SIMPLE t3 ref f,e e 5 test.t2.d 2 100.00 Using where
|
||||
1 SIMPLE t2 ref c c 5 test.t1.b 1 100.00 Using where
|
||||
1 SIMPLE t3 ref f,e e 5 test.t2.d 1 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d`,`test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(`test`.`t2`.`c` = `test`.`t1`.`b` and `test`.`t3`.`e` = `test`.`t2`.`d` and `test`.`t3`.`f` is not null and `test`.`t1`.`b` is not null and `test`.`t2`.`d` is not null) where `test`.`t1`.`a` < 5
|
||||
explain extended
|
||||
@ -5500,8 +5500,8 @@ on t2.c=t1.b and t3.f is not null
|
||||
where t1.a < 5;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t1 range a a 5 NULL 3 100.00 Using index condition
|
||||
1 SIMPLE t2 ref c c 5 test.t1.b 2 100.00 Using where
|
||||
1 SIMPLE t3 ref f,e e 5 test.t2.d 2 100.00 Using where
|
||||
1 SIMPLE t2 ref c c 5 test.t1.b 1 100.00 Using where
|
||||
1 SIMPLE t3 ref f,e e 5 test.t2.d 1 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d`,`test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(`test`.`t2`.`c` = `test`.`t1`.`b` and `test`.`t3`.`e` = `test`.`t2`.`d` and `test`.`t3`.`f` is not null and `test`.`t1`.`b` is not null and `test`.`t2`.`d` is not null) where `test`.`t1`.`a` < 5
|
||||
explain extended
|
||||
@ -5511,7 +5511,7 @@ where t1.a < 5;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t1 range a a 5 NULL 3 100.00 Using index condition
|
||||
1 SIMPLE t3 eq_ref f,e f 4 test.t1.a 1 100.00 Using where
|
||||
1 SIMPLE t2 ref c c 5 test.t1.b 2 100.00 Using where
|
||||
1 SIMPLE t2 ref c c 5 test.t1.b 1 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d`,`test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(`test`.`t2`.`c` = `test`.`t1`.`b` and `test`.`t3`.`f` = `test`.`t1`.`a` and `test`.`t2`.`d` = `test`.`t3`.`e` and `test`.`t1`.`a` is not null and `test`.`t1`.`a` is not null and `test`.`t1`.`b` is not null) where `test`.`t1`.`a` < 5
|
||||
explain extended
|
||||
@ -5522,7 +5522,7 @@ where t1.a < 5;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 SIMPLE t1 range a a 5 NULL 3 100.00 Using index condition
|
||||
1 SIMPLE t3 eq_ref f,e f 4 test.t1.a 1 100.00 Using where
|
||||
1 SIMPLE t2 ref c c 5 test.t1.b 2 100.00 Using where
|
||||
1 SIMPLE t2 ref c c 5 test.t1.b 1 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d`,`test`.`t3`.`e` AS `e`,`test`.`t3`.`f` AS `f` from `test`.`t1` left join (`test`.`t2` join `test`.`t3`) on(`test`.`t2`.`c` = `test`.`t1`.`b` and `test`.`t3`.`f` = `test`.`t1`.`a` and `test`.`t2`.`d` = `test`.`t3`.`e` and `test`.`t1`.`a` is not null and `test`.`t1`.`a` is not null and `test`.`t1`.`b` is not null) where `test`.`t1`.`a` < 5
|
||||
drop view v1;
|
||||
|
||||
@ -819,7 +819,7 @@ select * from (values (1)) tvc_0);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
|
||||
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
||||
3 DEPENDENT UNION <derived4> ref key0 key0 4 func 2 100.00
|
||||
3 DEPENDENT UNION <derived4> ref key0 key0 4 func 1 100.00
|
||||
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
||||
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
|
||||
Warnings:
|
||||
@ -1052,7 +1052,7 @@ select * from (values (1)) as tvc_0);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
|
||||
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
||||
3 DEPENDENT UNION <derived4> ref key0 key0 4 func 2 100.00
|
||||
3 DEPENDENT UNION <derived4> ref key0 key0 4 func 1 100.00
|
||||
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
||||
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
|
||||
Warnings:
|
||||
@ -1145,7 +1145,7 @@ select * from (values (1)) as tvc_0);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
|
||||
2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
||||
3 DEPENDENT UNION <derived4> ref key0 key0 4 func 2 100.00
|
||||
3 DEPENDENT UNION <derived4> ref key0 key0 4 func 1 100.00
|
||||
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
||||
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
|
||||
Warnings:
|
||||
|
||||
@ -150,7 +150,7 @@ FROM federated.t3, (SELECT * FROM federated.t1 WHERE id > 3) t
|
||||
WHERE federated.t3.name=t.name;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 7
|
||||
1 PRIMARY <derived2> ref key0 key0 18 federated.t3.name 2
|
||||
1 PRIMARY <derived2> ref key0 key0 18 federated.t3.name 1
|
||||
2 PUSHED DERIVED NULL NULL NULL NULL NULL NULL NULL NULL
|
||||
EXPLAIN FORMAT=JSON
|
||||
SELECT *
|
||||
@ -182,7 +182,7 @@ EXPLAIN
|
||||
"used_key_parts": ["name"],
|
||||
"ref": ["federated.t3.name"],
|
||||
"loops": 7,
|
||||
"rows": 2,
|
||||
"rows": 1,
|
||||
"cost": "COST_REPLACED",
|
||||
"filtered": 100,
|
||||
"materialized": {
|
||||
@ -204,7 +204,7 @@ FROM federated.t3, (SELECT * FROM federated.t1 WHERE id > 3) t
|
||||
WHERE federated.t3.name=t.name;
|
||||
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 7 7.00 100.00 100.00
|
||||
1 PRIMARY <derived2> ref key0 key0 18 federated.t3.name 2 0.00 100.00 100.00
|
||||
1 PRIMARY <derived2> ref key0 key0 18 federated.t3.name 1 0.00 100.00 100.00
|
||||
2 PUSHED DERIVED NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL
|
||||
SELECT *
|
||||
FROM federated.t3, (SELECT t1.name FROM federated.t1
|
||||
@ -221,7 +221,7 @@ FROM federated.t2 GROUP BY name)) t
|
||||
WHERE federated.t3.name=t.name;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 7
|
||||
1 PRIMARY <derived2> ref key0 key0 18 federated.t3.name 2
|
||||
1 PRIMARY <derived2> ref key0 key0 18 federated.t3.name 1
|
||||
2 PUSHED DERIVED NULL NULL NULL NULL NULL NULL NULL NULL
|
||||
ANALYZE FORMAT=JSON
|
||||
SELECT *
|
||||
@ -266,7 +266,7 @@ ANALYZE
|
||||
"ref": ["federated.t3.name"],
|
||||
"loops": 7,
|
||||
"r_loops": 7,
|
||||
"rows": 2,
|
||||
"rows": 1,
|
||||
"r_rows": 0,
|
||||
"cost": "REPLACED",
|
||||
"r_table_time_ms": "REPLACED",
|
||||
@ -308,7 +308,7 @@ SELECT * FROM federated.t1 WHERE id >= 5) t
|
||||
WHERE federated.t3.name=t.name;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 7
|
||||
1 PRIMARY <derived2> ref key1 key1 18 federated.t3.name 2
|
||||
1 PRIMARY <derived2> ref key1 key1 18 federated.t3.name 1
|
||||
2 PUSHED DERIVED NULL NULL NULL NULL NULL NULL NULL NULL
|
||||
#
|
||||
# MDEV-21887: federatedx crashes on SELECT ... INTO query in select_handler code
|
||||
|
||||
@ -1,6 +1,6 @@
|
||||
CREATE TABLE t1(a INT PRIMARY KEY, b VARCHAR(40), c INT, INDEX(b,c))
|
||||
ENGINE=InnoDB;
|
||||
INSERT INTO t1 VALUES (1,'1',1),(2,'2',1);
|
||||
INSERT INTO t1 VALUES (1,'1',1),(2,'2',1),(3,'3',1);
|
||||
SET @save_locks= @@GLOBAL.innodb_status_output_locks;
|
||||
SET GLOBAL INNODB_STATUS_OUTPUT_LOCKS = 'ON';
|
||||
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
|
||||
|
||||
@ -2,7 +2,7 @@
|
||||
|
||||
CREATE TABLE t1(a INT PRIMARY KEY, b VARCHAR(40), c INT, INDEX(b,c))
|
||||
ENGINE=InnoDB;
|
||||
INSERT INTO t1 VALUES (1,'1',1),(2,'2',1);
|
||||
INSERT INTO t1 VALUES (1,'1',1),(2,'2',1),(3,'3',1);
|
||||
|
||||
SET @save_locks= @@GLOBAL.innodb_status_output_locks;
|
||||
SET GLOBAL INNODB_STATUS_OUTPUT_LOCKS = 'ON';
|
||||
|
||||
@ -61,9 +61,9 @@ name ST_AsText(square)
|
||||
small POLYGON((0 0,0 1,1 1,1 0,0 0))
|
||||
SELECT name, ST_AsText(square) from t1 where MBRDisjoint(@p, square);
|
||||
name ST_AsText(square)
|
||||
right3 POLYGON((3 0,3 2,5 2,5 0,3 0))
|
||||
up3 POLYGON((0 3,0 5,2 5,2 3,0 3))
|
||||
down3 POLYGON((0 -3,0 -1,2 -1,2 -3,0 -3))
|
||||
right3 POLYGON((3 0,3 2,5 2,5 0,3 0))
|
||||
left3 POLYGON((-3 0,-3 2,-1 2,-1 0,-3 0))
|
||||
SELECT name, ST_AsText(square) from t1 where MBREquals(@p, square);
|
||||
name ST_AsText(square)
|
||||
|
||||
@ -405,7 +405,7 @@ WHERE
|
||||
table1.col_varchar_1024_latin1_key = table2.col_varchar_10_latin1 AND table1.pk<>0 ;
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE table2 ALL NULL NULL NULL NULL 2 Using where
|
||||
1 SIMPLE table1 ref PRIMARY,col_varchar_1024_latin1_key col_varchar_1024_latin1_key 1027 test.table2.col_varchar_10_latin1 2 Using index condition(BKA); Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
1 SIMPLE table1 ref PRIMARY,col_varchar_1024_latin1_key col_varchar_1024_latin1_key 1027 test.table2.col_varchar_10_latin1 1 Using index condition(BKA); Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan
|
||||
SELECT count(*)
|
||||
FROM t1 AS table1, t2 AS table2
|
||||
WHERE
|
||||
|
||||
@ -73,8 +73,8 @@ a b c
|
||||
1 -1 -1
|
||||
explain select * from t1 where c in (select c from t3 where c between -2 and -1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 range c c 5 NULL 3 Using index condition
|
||||
1 PRIMARY t3 eq_ref c c 5 test.t1.c 1 Using index
|
||||
1 PRIMARY t3 range c c 5 NULL 2 Using where; Using index
|
||||
1 PRIMARY t1 ref c c 5 test.t3.c 1
|
||||
# select_type=UNION, type=system
|
||||
# select_type=UNION RESULT, type=<union1,2>
|
||||
select * from t1 union select * from t2;
|
||||
|
||||
@ -61,7 +61,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 100.00
|
||||
2 DERIVED e ALL NULL NULL NULL NULL 4 100.00 Using where
|
||||
3 RECURSIVE UNION e ALL mgr-fk NULL NULL NULL 4 100.00 Using where
|
||||
3 RECURSIVE UNION <derived2> ref key0 key0 5 test.e.mgr 2 100.00
|
||||
3 RECURSIVE UNION <derived2> ref key0 key0 5 test.e.mgr 1 100.00
|
||||
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
|
||||
Warnings:
|
||||
Note 1003 with recursive ancestors as (/* select#2 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME AS OF TIMESTAMP @`ts_1` `e` where `test`.`e`.`name` = 'bill' and `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1` union /* select#3 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME AS OF TIMESTAMP @`ts_1` `e` join `ancestors` `a` where `a`.`emp_id` = `test`.`e`.`mgr` and `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1`)/* select#1 */ select `ancestors`.`emp_id` AS `emp_id`,`ancestors`.`name` AS `name`,`ancestors`.`mgr` AS `mgr`,`ancestors`.`salary` AS `salary` from `ancestors`
|
||||
@ -102,7 +102,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 4 100.00
|
||||
2 DERIVED e ALL NULL NULL NULL NULL 4 100.00 Using where
|
||||
3 RECURSIVE UNION e ALL mgr-fk NULL NULL NULL 4 100.00 Using where
|
||||
3 RECURSIVE UNION <derived2> ref key0 key0 5 test.e.mgr 2 100.00
|
||||
3 RECURSIVE UNION <derived2> ref key0 key0 5 test.e.mgr 1 100.00
|
||||
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
|
||||
Warnings:
|
||||
Note 1003 with recursive ancestors as (/* select#2 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME AS OF TIMESTAMP @`ts_1` `e` where `test`.`e`.`name` = 'bill' and `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1` union /* select#3 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME AS OF TIMESTAMP @`ts_1` `e` join `ancestors` `a` where `a`.`emp_id` = `test`.`e`.`mgr` and `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1`)/* select#1 */ select `ancestors`.`emp_id` AS `emp_id`,`ancestors`.`name` AS `name`,`ancestors`.`mgr` AS `mgr`,`ancestors`.`salary` AS `salary` from `ancestors`
|
||||
@ -140,10 +140,10 @@ where e.mgr = a.emp_id
|
||||
select name from emp where emp_id in (select emp_id from ancestors for system_time as of timestamp @ts_1);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY emp ALL PRIMARY NULL NULL NULL 4 100.00 Using where
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.emp.emp_id 2 50.00 FirstMatch(emp)
|
||||
1 PRIMARY <derived2> ref key0 key0 5 test.emp.emp_id 1 100.00 FirstMatch(emp)
|
||||
2 DERIVED e ALL NULL NULL NULL NULL 4 100.00 Using where
|
||||
3 RECURSIVE UNION e ALL mgr-fk NULL NULL NULL 4 100.00 Using where
|
||||
3 RECURSIVE UNION <derived2> ref key0 key0 5 test.e.mgr 2 100.00
|
||||
3 RECURSIVE UNION <derived2> ref key0 key0 5 test.e.mgr 1 100.00
|
||||
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL NULL
|
||||
Warnings:
|
||||
Note 1003 with recursive ancestors as (/* select#2 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME AS OF TIMESTAMP @`ts_1` `e` where `test`.`e`.`name` = 'bill' and `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1` union /* select#3 */ select `test`.`e`.`emp_id` AS `emp_id`,`test`.`e`.`name` AS `name`,`test`.`e`.`mgr` AS `mgr`,`test`.`e`.`salary` AS `salary` from `test`.`emp` FOR SYSTEM_TIME AS OF TIMESTAMP @`ts_1` `e` join `ancestors` `a` where `a`.`emp_id` = `test`.`e`.`mgr` and `test`.`e`.`row_end` > @`ts_1` and `test`.`e`.`row_start` <= @`ts_1`)/* select#1 */ select `test`.`emp`.`name` AS `name` from `test`.`emp` semi join (`ancestors`) where `ancestors`.`emp_id` = `test`.`emp`.`emp_id` and `test`.`emp`.`row_end` = TIMESTAMP'2038-01-19 03:14:07.999999'
|
||||
|
||||
@ -1337,7 +1337,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
EXPLAIN SELECT * FROM t1 WHERE b IN (SELECT a AS a_inner FROM t1 GROUP BY a_inner);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 5 func 2 Using index; Using where
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 5 func 1 Using index; Using where
|
||||
SET @@optimizer_switch=DEFAULT;
|
||||
DROP TABLE t1;
|
||||
#
|
||||
|
||||
@ -1330,7 +1330,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
EXPLAIN SELECT * FROM t1 WHERE b IN (SELECT a AS a_inner FROM t1 GROUP BY a_inner);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 17 func 2 Using index; Using where
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 17 func 1 Using index; Using where
|
||||
SET @@optimizer_switch=DEFAULT;
|
||||
DROP TABLE t1;
|
||||
#
|
||||
|
||||
@ -2524,7 +2524,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
EXPLAIN SELECT * FROM t1 WHERE b IN (SELECT a AS a_inner FROM t1 GROUP BY a_inner);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 17 func 2 Using index; Using where
|
||||
2 DEPENDENT SUBQUERY t1 index_subquery a a 17 func 1 Using index; Using where
|
||||
SET @@optimizer_switch=DEFAULT;
|
||||
DROP TABLE t1;
|
||||
#
|
||||
|
||||
@ -4140,7 +4140,7 @@ public:
|
||||
virtual int multi_range_read_next(range_id_t *range_info);
|
||||
private:
|
||||
inline void calculate_costs(Cost_estimate *cost, uint keyno,
|
||||
uint ranges, uint flags,
|
||||
uint ranges, uint multi_row_ranges, uint flags,
|
||||
ha_rows total_rows,
|
||||
ulonglong io_blocks,
|
||||
ulonglong unassigned_single_point_ranges);
|
||||
|
||||
@ -27,10 +27,25 @@ static void get_sweep_read_cost(TABLE *table, ha_rows nrows, bool interrupted,
|
||||
|
||||
|
||||
|
||||
/* The following calculation is the same as in multi_range_read_info() */
|
||||
/*
|
||||
The following calculation is the same as in multi_range_read_info()
|
||||
|
||||
@param cost Total cost is stored here
|
||||
@param keyno Key number
|
||||
@param n_ranges Number of different ranges
|
||||
@param multi_row_ranges Number of ranges that are not EQ_REF
|
||||
@param flags Flags. Only HA_MRR_INDEX_ONLY is used.
|
||||
@param total_rows Number of rows expected to be read.
|
||||
@param io_blocks Number of blocks we expect to read for
|
||||
a not clustered index.
|
||||
@param unassigned_single_point_ranges
|
||||
Number of blocks we have not yet read for
|
||||
a clustered index.
|
||||
*/
|
||||
|
||||
void handler::calculate_costs(Cost_estimate *cost, uint keyno,
|
||||
uint n_ranges, uint flags,
|
||||
uint n_ranges, uint multi_row_ranges,
|
||||
uint flags,
|
||||
ha_rows total_rows,
|
||||
ulonglong io_blocks,
|
||||
ulonglong unassigned_single_point_ranges)
|
||||
@ -39,7 +54,9 @@ void handler::calculate_costs(Cost_estimate *cost, uint keyno,
|
||||
|
||||
if (!is_clustering_key(keyno))
|
||||
{
|
||||
cost->index_cost= ha_keyread_time(keyno, n_ranges, total_rows, io_blocks);
|
||||
cost->index_cost= ha_keyread_time(keyno, n_ranges,
|
||||
total_rows + multi_row_ranges,
|
||||
io_blocks);
|
||||
|
||||
if (!(flags & HA_MRR_INDEX_ONLY))
|
||||
{
|
||||
@ -58,7 +75,9 @@ void handler::calculate_costs(Cost_estimate *cost, uint keyno,
|
||||
{
|
||||
/* Clustered index */
|
||||
io_blocks= unassigned_single_point_ranges;
|
||||
cost->index_cost= ha_keyread_time(keyno, n_ranges, total_rows, io_blocks);
|
||||
cost->index_cost= ha_keyread_time(keyno, n_ranges,
|
||||
total_rows + multi_row_ranges,
|
||||
io_blocks);
|
||||
cost->copy_cost= rows2double(total_rows) * ROW_COPY_COST;
|
||||
}
|
||||
/* Adjust io cost to data size */
|
||||
@ -355,7 +374,9 @@ handler::multi_range_read_info_const(uint keyno, RANGE_SEQ_IF *seq,
|
||||
{
|
||||
set_if_smaller(total_rows, max_rows);
|
||||
*flags |= HA_MRR_USE_DEFAULT_IMPL;
|
||||
calculate_costs(cost, keyno, n_ranges, *flags, total_rows,
|
||||
calculate_costs(cost, keyno, n_ranges,
|
||||
n_ranges - (uint) single_point_ranges,
|
||||
*flags, total_rows,
|
||||
io_blocks, unassigned_single_point_ranges);
|
||||
if (top_limit < total_rows)
|
||||
{
|
||||
@ -365,8 +386,10 @@ handler::multi_range_read_info_const(uint keyno, RANGE_SEQ_IF *seq,
|
||||
when we find the 'accepted rows' at once.
|
||||
*/
|
||||
Cost_estimate limit_cost;
|
||||
calculate_costs(&limit_cost, keyno, n_ranges, *flags, top_limit,
|
||||
io_blocks, unassigned_single_point_ranges);
|
||||
calculate_costs(&limit_cost, keyno, n_ranges,
|
||||
n_ranges - (uint)single_point_ranges,
|
||||
*flags, top_limit, io_blocks,
|
||||
unassigned_single_point_ranges);
|
||||
cost->limit_cost= limit_cost.total_cost();
|
||||
}
|
||||
DBUG_PRINT("statistics",
|
||||
|
||||
@ -7848,6 +7848,8 @@ static double matching_candidates_in_table(JOIN_TAB *s,
|
||||
/*
|
||||
Calculate the cost of reading a set of rows trough an index
|
||||
|
||||
@param eq_ref True if there is only one matching key (EQ_REF)
|
||||
|
||||
Logically this is identical to the code in multi_range_read_info_const()
|
||||
excepts the function also takes into account io_blocks and multiple
|
||||
ranges.
|
||||
@ -7863,15 +7865,20 @@ static double matching_candidates_in_table(JOIN_TAB *s,
|
||||
KEY_COPY_COST as for filtering there is no copying of not accepted
|
||||
keys.
|
||||
|
||||
If eq_ref is not set, it means that we have to do one extra 'read_next'
|
||||
on the index to verify that there is not more keys with the same value.
|
||||
|
||||
WHERE_COST cost is not added to any result.
|
||||
*/
|
||||
|
||||
static ALL_READ_COST cost_for_index_read(const THD *thd, const TABLE *table,
|
||||
uint key, ha_rows records)
|
||||
uint key, ha_rows records,
|
||||
bool eq_ref)
|
||||
{
|
||||
ALL_READ_COST cost;
|
||||
handler *file= table->file;
|
||||
ha_rows max_seeks;
|
||||
ha_rows extra_reads= eq_ref ? 0 : 1;
|
||||
DBUG_ENTER("cost_for_index_read");
|
||||
|
||||
max_seeks= (ha_rows) thd->variables.max_seeks_for_key;
|
||||
@ -7880,7 +7887,7 @@ static ALL_READ_COST cost_for_index_read(const THD *thd, const TABLE *table,
|
||||
if (file->is_clustering_key(key))
|
||||
{
|
||||
cost.index_cost=
|
||||
file->ha_keyread_clustered_time(key, 1, records, 0);
|
||||
file->ha_keyread_clustered_time(key, 1, records+extra_reads, 0);
|
||||
cost.copy_cost= rows2double(records) * file->ROW_COPY_COST;
|
||||
/* There is no 'index_only_read' with a clustered index */
|
||||
cost.row_cost= {0,0};
|
||||
@ -7890,7 +7897,7 @@ static ALL_READ_COST cost_for_index_read(const THD *thd, const TABLE *table,
|
||||
}
|
||||
else if (table->covering_keys.is_set(key) && !table->no_keyread)
|
||||
{
|
||||
cost.index_cost= file->ha_keyread_time(key, 1, records, 0);
|
||||
cost.index_cost= file->ha_keyread_time(key, 1, records + extra_reads, 0);
|
||||
cost.row_cost= {0,0};
|
||||
cost.copy_cost= rows2double(records) * file->KEY_COPY_COST;
|
||||
cost.max_index_blocks= MY_MIN(file->index_blocks(key), max_seeks);
|
||||
@ -7898,7 +7905,7 @@ static ALL_READ_COST cost_for_index_read(const THD *thd, const TABLE *table,
|
||||
}
|
||||
else
|
||||
{
|
||||
cost.index_cost= file->ha_keyread_time(key, 1, records, 0);
|
||||
cost.index_cost= file->ha_keyread_time(key, 1, records + extra_reads, 0);
|
||||
/* ha_rnd_pos_time() includes time for copying the row */
|
||||
cost.row_cost= file->ha_rnd_pos_time(records);
|
||||
cost.max_index_blocks= MY_MIN(file->index_blocks(key), max_seeks);
|
||||
@ -8341,7 +8348,7 @@ best_access_path(JOIN *join,
|
||||
}
|
||||
else
|
||||
{
|
||||
tmp= cost_for_index_read(thd, table, key, 1);
|
||||
tmp= cost_for_index_read(thd, table, key, 1, 1);
|
||||
}
|
||||
/*
|
||||
Calculate an adjusted cost based on how many records are read
|
||||
@ -8407,8 +8414,8 @@ best_access_path(JOIN *join,
|
||||
((double) (table->s->max_key_length-keyinfo->key_length) /
|
||||
(double) table->s->max_key_length)));
|
||||
set_if_smaller(records, (double)s->records);
|
||||
if (records < 2.0)
|
||||
records=2.0; /* Can't be as good as a unique */
|
||||
if (records < 1.0)
|
||||
records= 1.0; /* Can't be as good as a unique */
|
||||
}
|
||||
|
||||
/*
|
||||
@ -8449,7 +8456,7 @@ best_access_path(JOIN *join,
|
||||
}
|
||||
/* Calculate the cost of the index access */
|
||||
tmp= cost_for_index_read(thd, table, key,
|
||||
(ha_rows) records);
|
||||
(ha_rows) records, 0);
|
||||
}
|
||||
}
|
||||
else
|
||||
@ -8633,7 +8640,7 @@ best_access_path(JOIN *join,
|
||||
}
|
||||
|
||||
set_if_smaller(records, (double) s->records);
|
||||
tmp= cost_for_index_read(thd, table, key, (ha_rows)records);
|
||||
tmp= cost_for_index_read(thd, table, key, (ha_rows)records, 0);
|
||||
tmp.copy_cost+= extra_cost;
|
||||
}
|
||||
else
|
||||
@ -9078,7 +9085,7 @@ best_access_path(JOIN *join,
|
||||
{
|
||||
ALL_READ_COST cost= cost_for_index_read(thd, table,
|
||||
forced_index,
|
||||
s->records);
|
||||
s->records, 0);
|
||||
cur_cost= file->cost(cost);
|
||||
/* Calculate cost of checking the attached WHERE */
|
||||
cur_cost= COST_ADD(cur_cost,
|
||||
@ -30403,7 +30410,7 @@ static bool get_range_limit_read_cost(const POSITION *pos,
|
||||
<=> N > refkey_rows_estimate.
|
||||
*/
|
||||
ALL_READ_COST cost= cost_for_index_read(table->in_use, table, keynr,
|
||||
rows_to_scan);
|
||||
rows_to_scan, 0);
|
||||
*read_cost= (table->file->cost(&cost) +
|
||||
rows_to_scan * WHERE_COST_THD(table->in_use));
|
||||
*read_rows= rows2double(rows_to_scan);
|
||||
|
||||
@ -72,11 +72,8 @@ connection child2_1;
|
||||
SET NAMES utf8;
|
||||
SELECT argument FROM mysql.general_log WHERE command_type != 'Execute' AND argument LIKE '%select %';
|
||||
argument
|
||||
select `a`,`b` from `auto_test_remote`.`ta_r3` where `a` = 11 order by `b`
|
||||
select `a`,`b` from `auto_test_remote`.`ta_r3` where `a` = 12 order by `b`
|
||||
select `a`,`b` from `auto_test_remote`.`ta_r3` where `a` = 13 order by `b`
|
||||
select `a`,`b` from `auto_test_remote`.`ta_r3` where `a` = 14 order by `b`
|
||||
select `a`,`b` from `auto_test_remote`.`ta_r3` where `a` = 15 order by `b`
|
||||
select `a`,`b` from `auto_test_remote`.`ta_r2` order by `a`,`b`
|
||||
select `a`,`b` from `auto_test_remote`.`ta_r3` order by `a`,`b`
|
||||
SELECT argument FROM mysql.general_log WHERE command_type != 'Execute' AND argument LIKE '%select %'
|
||||
SELECT a, b, c FROM ta_r2 ORDER BY a ;
|
||||
SELECT a, b, c FROM ta_r3 ORDER BY a;
|
||||
|
||||
@ -87,7 +87,7 @@ NULL NULL NULL 3
|
||||
connection child2_1;
|
||||
SELECT argument FROM mysql.general_log WHERE command_type != 'Execute' AND argument LIKE '%select %';
|
||||
argument
|
||||
select t0.`a` `a`,t2.`b` `b`,t2.`c` `c`,t3.`a` `a` from `auto_test_remote`.`ta_r_no_idx` t3 left join (`auto_test_remote`.`ta_r_auto_inc` t2 join `auto_test_remote`.`ta_r_3` t1 join `auto_test_remote`.`ta_r` t0) on ((t2.`b` = t3.`b`) and (t2.`c` = t1.`c`) and (t0.`a` = t1.`a`) and (t1.`a` is not null) and (t3.`b` is not null)) where 1 order by t3.`a` desc
|
||||
select t0.`a` `a`,t2.`b` `b`,t2.`c` `c`,t3.`a` `a` from `auto_test_remote`.`ta_r_no_idx` t3 left join (`auto_test_remote`.`ta_r_auto_inc` t2 join `auto_test_remote`.`ta_r_3` t1 join `auto_test_remote`.`ta_r` t0) on ((t2.`b` = t3.`b`) and (t1.`c` = t2.`c`) and (t0.`a` = t1.`a`) and (t3.`b` is not null) and (t1.`a` is not null)) where 1 order by t3.`a` desc
|
||||
SELECT argument FROM mysql.general_log WHERE command_type != 'Execute' AND argument LIKE '%select %'
|
||||
SELECT a, b, date_format(c, '%Y-%m-%d %H:%i:%s') FROM ta_r ORDER BY a;
|
||||
a b date_format(c, '%Y-%m-%d %H:%i:%s')
|
||||
|
||||
@ -87,7 +87,7 @@ NULL c 2000-01-03 00:00:00 3
|
||||
connection child2_1;
|
||||
SELECT argument FROM mysql.general_log WHERE command_type != 'Execute' AND argument LIKE '%select %';
|
||||
argument
|
||||
select t0.`a` `a`,t2.`b` `b`,t2.`c` `c`,t3.`a` `a` from `auto_test_remote`.`ta_r_no_idx` t3 left join (`auto_test_remote`.`ta_r_auto_inc` t2 join `auto_test_remote`.`ta_r_3` t1 left join `auto_test_remote`.`ta_r` t0 on ((t0.`a` = t1.`a`) and (t1.`a` is not null))) on ((t2.`b` = t3.`b`) and (t2.`c` = t1.`c`) and (t3.`b` is not null)) where 1 order by t3.`a` desc
|
||||
select t0.`a` `a`,t2.`b` `b`,t2.`c` `c`,t3.`a` `a` from `auto_test_remote`.`ta_r_no_idx` t3 left join (`auto_test_remote`.`ta_r_auto_inc` t2 join `auto_test_remote`.`ta_r_3` t1 left join `auto_test_remote`.`ta_r` t0 on ((t0.`a` = t1.`a`) and (t1.`a` is not null))) on ((t2.`b` = t3.`b`) and (t1.`c` = t2.`c`) and (t3.`b` is not null)) where 1 order by t3.`a` desc
|
||||
SELECT argument FROM mysql.general_log WHERE command_type != 'Execute' AND argument LIKE '%select %'
|
||||
SELECT a, b, date_format(c, '%Y-%m-%d %H:%i:%s') FROM ta_r ORDER BY a;
|
||||
a b date_format(c, '%Y-%m-%d %H:%i:%s')
|
||||
|
||||
Reference in New Issue
Block a user