Block_Nested_Loop Bug at Maryanne Coy blog

Block_Nested_Loop Bug. Create table t0 (c0 text); Incorrect nested loop left join when transforming block_nested_loop condition. A workaround for this is to disable block_nested_loop: It is possible to control whether hash joins are employed using one of the bnl and. Simplify the query and speed it up: This is a simple use case： mysql> explain analyze select distinct t0.c10 from t0, t1 group by t0.c10; By default, mysql employs hash joins whenever possible. Insert into t0(c0) values ('a'),('b'),('c'),(null);

Insert into t0(c0) values ('a'),('b'),('c'),(null); Create table t0 (c0 text); This is a simple use case： mysql> explain analyze select distinct t0.c10 from t0, t1 group by t0.c10; Simplify the query and speed it up: By default, mysql employs hash joins whenever possible. A workaround for this is to disable block_nested_loop: Incorrect nested loop left join when transforming block_nested_loop condition. It is possible to control whether hash joins are employed using one of the bnl and.

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Block_Nested_Loop Bug Insert into t0(c0) values ('a'),('b'),('c'),(null); Insert into t0(c0) values ('a'),('b'),('c'),(null); Simplify the query and speed it up: It is possible to control whether hash joins are employed using one of the bnl and. By default, mysql employs hash joins whenever possible. Incorrect nested loop left join when transforming block_nested_loop condition. This is a simple use case： mysql> explain analyze select distinct t0.c10 from t0, t1 group by t0.c10; A workaround for this is to disable block_nested_loop: Create table t0 (c0 text);

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