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c2924e155e
- The problem was that DuplicateWeedout strategy setup code wasn't aware of the
fact that join buffering will be used and applied optimization that doesn't work
together with join buffering. Fixed by making DuplicateWeedout setup code to have
a pessimistic check about whether there is a chance that join buffering will be
used.
- Make JOIN_CACHE_BKA::init() correctly process Copy_field elements that denote saving
current rowids in the join buffer.
mysql-test/r/subselect_sj2.result:
Update test results
mysql-test/r/subselect_sj2_jcl6.result:
Update test results
mysql-test/r/subselect_sj_jcl6.result:
Testcase
mysql-test/t/subselect_sj2.test:
Update test results
mysql-test/t/subselect_sj_jcl6.test:
Testcase
sql/opt_subselect.cc:
- The problem was that DuplicateWeedout strategy setup code wasn't aware of the
fact that join buffering will be used and applied optimization that doesn't work
together with join buffering. Fixed by making DuplicateWeedout setup code to have
a pessimistic check about whether there is a chance that join buffering will be
used.
sql/sql_join_cache.cc:
Make JOIN_CACHE_BKA::init() correctly process Copy_field elements that denote saving current rowids in the join buffer.
sql/sql_select.cc:
Added a question note
39 lines
1 KiB
Text
39 lines
1 KiB
Text
#
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# Run subselect_sj.test with BKA enabled
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#
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set join_cache_level=6;
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show variables like 'join_cache_level';
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--source t/subselect_sj.test
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--echo #
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--echo # BUG#49129: Wrong result with IN-subquery with join_cache_level=6 and firstmatch=off
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--echo #
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CREATE TABLE t0 (a INT);
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INSERT INTO t0 VALUES (0),(1),(2),(3),(4);
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CREATE TABLE t1 (a INT, b INT, KEY(a));
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INSERT INTO t1 SELECT a, a from t0;
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CREATE TABLE t2 (a INT, b INT, PRIMARY KEY(a));
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INSERT INTO t2 SELECT * FROM t1;
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UPDATE t1 SET a=3, b=11 WHERE a=4;
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UPDATE t2 SET b=11 WHERE a=3;
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set @save_optimizer_switch=@@optimizer_switch;
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set optimizer_switch='firstmatch=off';
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--echo The following should use a join order of t0,t1,t2, with DuplicateElimination:
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explain
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SELECT * FROM t0 WHERE t0.a IN
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(SELECT t1.a FROM t1, t2 WHERE t2.a=t0.a AND t1.b=t2.b);
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SELECT * FROM t0 WHERE t0.a IN
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(SELECT t1.a FROM t1, t2 WHERE t2.a=t0.a AND t1.b=t2.b);
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set optimizer_switch=@save_optimizer_switch;
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drop table t0, t1, t2;
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--echo # End
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set join_cache_level=default;
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show variables like 'join_cache_level';
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