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39 lines
986 B
Text
39 lines
986 B
Text
SET SESSION optimizer_switch = 'firstmatch=off,index_merge=on,index_merge_union=on,index_merge_sort_union=on,index_merge_intersection=on,loosescan=on,materialization=on,semijoin=on';
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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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# This result is wrong, but will be fixed by Bug#46556
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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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a
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0
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1
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2
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3
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SET join_cache_level = 6;
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# This result is even more wrong ;-)
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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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a
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0
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1
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2
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3
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SET SESSION optimizer_switch = 'semijoin=off';
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# This result is correct
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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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a
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0
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1
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2
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3
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DROP TABLE t0, t1, t2;
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