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Merge 10.6 into 10.9
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@ -1836,7 +1836,6 @@ test.t1 analyze status OK
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test.t2 analyze status Engine-independent statistics collected
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test.t2 analyze status OK
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set optimizer_switch='exists_to_in=off';
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set optimizer_use_condition_selectivity=2;
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SELECT * FROM t1
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WHERE
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EXISTS (SELECT * FROM t1 A INNER JOIN t2 ON t2.a = A.id
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@ -1861,18 +1860,39 @@ id a
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17 17
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18 18
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19 19
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explain SELECT * FROM t1
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set statement optimizer_use_condition_selectivity=2 for explain SELECT * FROM t1
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WHERE
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EXISTS (SELECT * FROM t1 A INNER JOIN t2 ON t2.a = A.id
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WHERE A.a=t1.a AND t2.b < 20);
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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 NULL a 5 NULL 100 Using where; Using index
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2 DEPENDENT SUBQUERY A ref PRIMARY,a a 5 test.t1.a 1 Using index
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2 DEPENDENT SUBQUERY t2 ref|filter a,b a|b 5|5 test.A.id 1 (19%) Using where; Using rowid filter
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EXPLAIN SELECT * FROM t1 A, t1 B WHERE A.a = B.a and A.id = 65;
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3 DEPENDENT SUBQUERY A ref PRIMARY,a a 5 test.t1.a 1 Using index
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3 DEPENDENT SUBQUERY t2 ref|filter a,b a|b 5|5 test.A.id 1 (19%) Using where; Using rowid filter
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set statement optimizer_use_condition_selectivity=4 for explain SELECT * FROM t1
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WHERE
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EXISTS (SELECT * FROM t1 A INNER JOIN t2 ON t2.a = A.id
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WHERE A.a=t1.a AND t2.b < 20);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE A const PRIMARY,a PRIMARY 4 const 1
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1 SIMPLE B ref a a 5 const 1 Using index
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1 PRIMARY t1 index NULL a 5 NULL 100 Using where; Using index
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3 DEPENDENT SUBQUERY A ref PRIMARY,a a 5 test.t1.a 1 Using index
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3 DEPENDENT SUBQUERY t2 ref|filter a,b a|b 5|5 test.A.id 1 (19%) Using where; Using rowid filter
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set @query="EXPLAIN SELECT * FROM t1 A, t1 B WHERE A.a = B.a and A.id = 65";
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set statement optimizer_use_condition_selectivity=2 for explain SELECT * FROM t1
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WHERE
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EXISTS (SELECT * FROM t1 A INNER JOIN t2 ON t2.a = A.id
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WHERE A.a=t1.a AND t2.b < 20);
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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 NULL a 5 NULL 100 Using where; Using index
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3 DEPENDENT SUBQUERY A ref PRIMARY,a a 5 test.t1.a 1 Using index
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3 DEPENDENT SUBQUERY t2 ref|filter a,b a|b 5|5 test.A.id 1 (19%) Using where; Using rowid filter
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set statement optimizer_use_condition_selectivity=4 for explain SELECT * FROM t1
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WHERE
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EXISTS (SELECT * FROM t1 A INNER JOIN t2 ON t2.a = A.id
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WHERE A.a=t1.a AND t2.b < 20);
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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 NULL a 5 NULL 100 Using where; Using index
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3 DEPENDENT SUBQUERY A ref PRIMARY,a a 5 test.t1.a 1 Using index
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3 DEPENDENT SUBQUERY t2 ref|filter a,b a|b 5|5 test.A.id 1 (19%) Using where; Using rowid filter
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explain SELECT * FROM t1
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WHERE
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EXISTS (SELECT * FROM t1 A INNER JOIN t2 ON t2.a = A.id
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@ -1882,7 +1902,6 @@ id select_type table type possible_keys key key_len ref rows Extra
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2 DEPENDENT SUBQUERY A ref PRIMARY,a a 5 test.t1.a 1 Using index
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2 DEPENDENT SUBQUERY t2 ref|filter a,b a|b 5|5 test.A.id 1 (19%) Using where; Using rowid filter
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set optimizer_switch= @save_optimizer_switch;
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set optimizer_use_condition_selectivity= @save_optimizer_use_condition_selectivity;
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drop table t1,t2;
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#
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# MDEV-21495: Conditional jump or move depends on uninitialised value in sel_arg_range_seq_next
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