File: bug49129.test

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file content (34 lines) | stat: -rw-r--r-- 1,011 bytes parent folder | download | duplicates (11) 
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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';

CREATE TABLE t0 (a INT);
INSERT INTO t0 VALUES (0),(1),(2),(3),(4);

CREATE TABLE t1 (a INT, b INT, KEY(a));
INSERT INTO t1 SELECT a, a from t0;

CREATE TABLE t2 (a INT, b INT, PRIMARY KEY(a));
INSERT INTO t2 SELECT * FROM t1;

UPDATE t1 SET a=3, b=11 WHERE a=4;
UPDATE t2 SET b=11 WHERE a=3;

--echo
--echo # This result is wrong, but will be fixed by Bug#46556
SELECT * FROM t0 WHERE t0.a IN 
  (SELECT t1.a FROM t1, t2 WHERE t2.a=t0.a AND t1.b=t2.b);

SET join_cache_level = 6;

--echo
--echo # This result is even more wrong ;-)
SELECT * FROM t0 WHERE t0.a IN 
  (SELECT t1.a FROM t1, t2 WHERE t2.a=t0.a AND t1.b=t2.b);

SET SESSION optimizer_switch = 'semijoin=off';

--echo
--echo # This result is correct
SELECT * FROM t0 WHERE t0.a IN 
  (SELECT t1.a FROM t1, t2 WHERE t2.a=t0.a AND t1.b=t2.b);

DROP TABLE t0, t1, t2;