mirror of
https://github.com/MariaDB/server.git
synced 2025-11-22 17:44:29 +03:00
704f97035f
Resolved all conflicts, bad merges and fixed a few minor bugs in the code. Commented out the queries from multi_update, view, subselect_sj, func_str, derived_view, view_grant that failed either with crashes in ps-protocol or with wrong results. The failures are clear indications of some bugs in the code and these bugs are to be fixed.
264 lines
8.9 KiB
Plaintext
264 lines
8.9 KiB
Plaintext
SET @@session.storage_engine = 'InnoDB';
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create table t1 (a int,
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b int as (-a),
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c int as (-a) persistent,
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index (c));
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insert into t1 (a) values (2), (1), (1), (3), (NULL);
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create table t2 like t1;
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insert into t2 (a) values (1);
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create table t3 (a int primary key,
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b int as (-a),
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c int as (-a) persistent unique);
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insert into t3 (a) values (2),(1),(3);
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# select_type=SIMPLE, type=system
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select * from t2;
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a b c
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1 -1 -1
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explain select * from t2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ALL NULL NULL NULL NULL 1
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select * from t2 where c=-1;
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a b c
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1 -1 -1
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explain select * from t2 where c=-1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 ref c c 5 const 1
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# select_type=SIMPLE, type=ALL
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select * from t1 where b=-1;
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a b c
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1 -1 -1
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1 -1 -1
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explain select * from t1 where b=-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 ALL NULL NULL NULL NULL 5 Using where
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# select_type=SIMPLE, type=const
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select * from t3 where a=1;
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a b c
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1 -1 -1
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explain select * from t3 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 t3 const PRIMARY PRIMARY 4 const 1
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# select_type=SIMPLE, type=range
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select * from t3 where c>=-1;
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a b c
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1 -1 -1
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explain select * from t3 where c>=-1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t3 range c c 5 NULL 1 Using index condition; Rowid-ordered scan
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# select_type=SIMPLE, type=ref
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select * from t1,t3 where t1.c=t3.c and t3.c=-1;
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a b c a b c
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1 -1 -1 1 -1 -1
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1 -1 -1 1 -1 -1
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explain select * from t1,t3 where t1.c=t3.c and t3.c=-1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t3 const c c 5 const 1
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1 SIMPLE t1 ref c c 5 const 2
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# select_type=PRIMARY, type=index,ALL
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select * from t1 where b in (select c from t3);
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a b c
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2 -2 -2
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1 -1 -1
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1 -1 -1
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3 -3 -3
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explain select * from t1 where b in (select c from t3);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t3 index c c 5 NULL 3 Using index
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1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)
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# select_type=PRIMARY, type=range,ref
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select * from t1 where c in (select c from t3 where c between -2 and -1);
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a b c
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2 -2 -2
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1 -1 -1
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1 -1 -1
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explain select * from t1 where c in (select c from t3 where c between -2 and -1);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t3 index c c 5 NULL 3 Using where; Using index
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1 PRIMARY t1 ref c c 5 test.t3.c 1
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# select_type=UNION, type=system
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# select_type=UNION RESULT, type=<union1,2>
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select * from t1 union select * from t2;
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a b c
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2 -2 -2
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1 -1 -1
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3 -3 -3
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NULL NULL NULL
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explain select * from t1 union select * from t2;
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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 5
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2 UNION t2 ALL NULL NULL NULL NULL 1
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NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL
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# select_type=DERIVED, type=system
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select * from (select a,b,c from t1) as t11;
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a b c
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2 -2 -2
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1 -1 -1
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1 -1 -1
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3 -3 -3
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NULL NULL NULL
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explain select * from (select a,b,c from t1) as t11;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 5
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###
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### Using aggregate functions with/without DISTINCT
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###
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# SELECT COUNT(*) FROM tbl_name
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select count(*) from t1;
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count(*)
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5
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explain select count(*) from t1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index NULL c 5 NULL 5 Using index
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# SELECT COUNT(DISTINCT <non-vcol>) FROM tbl_name
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select count(distinct a) from t1;
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count(distinct a)
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3
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explain select count(distinct a) from t1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 5
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# SELECT COUNT(DISTINCT <non-stored vcol>) FROM tbl_name
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select count(distinct b) from t1;
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count(distinct b)
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3
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explain select count(distinct b) from t1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 5
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# SELECT COUNT(DISTINCT <stored vcol>) FROM tbl_name
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select count(distinct c) from t1;
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count(distinct c)
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3
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explain select count(distinct c) from t1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index NULL c 5 NULL 5 Using index
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###
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### filesort & range-based utils
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###
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# SELECT * FROM tbl_name WHERE <vcol expr>
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select * from t3 where c >= -2;
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a b c
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1 -1 -1
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2 -2 -2
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explain select * from t3 where 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 t3 range c c 5 NULL 1 Using index condition; Rowid-ordered scan
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# SELECT * FROM tbl_name WHERE <non-vcol expr>
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select * from t3 where a between 1 and 2;
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a b c
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1 -1 -1
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2 -2 -2
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explain select * from t3 where a between 1 and 2;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t3 range PRIMARY PRIMARY 4 NULL 1 Using where
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# SELECT * FROM tbl_name WHERE <non-indexed vcol expr>
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select * from t3 where b between -2 and -1;
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a b c
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1 -1 -1
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2 -2 -2
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explain select * from t3 where b between -2 and -1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t3 ALL NULL NULL NULL NULL 3 Using where
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# SELECT * FROM tbl_name WHERE <indexed vcol expr>
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select * from t3 where c between -2 and -1;
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a b c
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1 -1 -1
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2 -2 -2
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explain select * from t3 where c between -2 and -1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t3 range c c 5 NULL 1 Using index condition; Rowid-ordered scan
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# SELECT * FROM tbl_name WHERE <non-vcol expr> ORDER BY <non-indexed vcol>
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select * from t3 where a between 1 and 2 order by b;
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a b c
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2 -2 -2
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1 -1 -1
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explain select * from t3 where a between 1 and 2 order by b;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t3 range PRIMARY PRIMARY 4 NULL 1 Using where; Using filesort
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# SELECT * FROM tbl_name WHERE <non-vcol expr> ORDER BY <indexed vcol>
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select * from t3 where a between 1 and 2 order by c;
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a b c
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2 -2 -2
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1 -1 -1
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explain select * from t3 where a between 1 and 2 order by c;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t3 range PRIMARY PRIMARY 4 NULL 1 Using where; Using filesort
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# SELECT * FROM tbl_name WHERE <non-indexed vcol expr> ORDER BY <non-vcol>
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select * from t3 where b between -2 and -1 order by a;
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a b c
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1 -1 -1
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2 -2 -2
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explain select * from t3 where b between -2 and -1 order by a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t3 index NULL PRIMARY 4 NULL 3 Using where
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# SELECT * FROM tbl_name WHERE <non-indexed vcol expr> ORDER BY <non-indexed vcol>
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select * from t3 where b between -2 and -1 order by b;
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a b c
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2 -2 -2
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1 -1 -1
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explain select * from t3 where b between -2 and -1 order by b;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t3 ALL NULL NULL NULL NULL 3 Using where; Using filesort
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# SELECT * FROM tbl_name WHERE <indexed vcol expr> ORDER BY <non-indexed vcol>
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select * from t3 where c between -2 and -1 order by b;
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a b c
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2 -2 -2
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1 -1 -1
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explain select * from t3 where c between -2 and -1 order by b;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t3 range c c 5 NULL 1 Using index condition; Rowid-ordered scan; Using filesort
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# SELECT * FROM tbl_name WHERE <non-indexed vcol expr> ORDER BY <indexed vcol>
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select * from t3 where b between -2 and -1 order by c;
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a b c
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2 -2 -2
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1 -1 -1
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explain select * from t3 where b between -2 and -1 order by c;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t3 ALL NULL NULL NULL NULL 3 Using where; Using filesort
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# SELECT * FROM tbl_name WHERE <indexed vcol expr> ORDER BY <indexed vcol>
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select * from t3 where c between -2 and -1 order by c;
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a b c
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2 -2 -2
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1 -1 -1
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explain select * from t3 where c between -2 and -1 order by c;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t3 range c c 5 NULL 1 Using index condition
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# SELECT sum(<non-indexed vcol>) FROM tbl_name GROUP BY <non-indexed vcol>
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select sum(b) from t1 group by b;
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sum(b)
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NULL
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-3
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-2
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-2
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explain select sum(b) from t1 group by b;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort
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# SELECT sum(<indexed vcol>) FROM tbl_name GROUP BY <indexed vcol>
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select sum(c) from t1 group by c;
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sum(c)
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NULL
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-3
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-2
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-2
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explain select sum(c) from t1 group by c;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index NULL c 5 NULL 5 Using index
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# SELECT sum(<non-indexed vcol>) FROM tbl_name GROUP BY <indexed vcol>
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select sum(b) from t1 group by c;
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sum(b)
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NULL
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-3
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-2
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-2
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explain select sum(b) from t1 group by c;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index NULL c 5 NULL 5
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# SELECT sum(<indexed vcol>) FROM tbl_name GROUP BY <non-indexed vcol>
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select sum(c) from t1 group by b;
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sum(c)
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NULL
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-3
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-2
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-2
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explain select sum(c) from t1 group by b;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort
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