| Server IP : 88.99.149.37 / Your IP : 216.73.216.141 Web Server : nginx/1.31.2 System : Linux server-88-99-149-37 6.12.0-124.56.5.el10_1.x86_64 #1 SMP PREEMPT_DYNAMIC Fri May 15 06:12:08 EDT 2026 x86_64 User : muralimurth ( 1015) PHP Version : 8.4.23 Disable Function : exec,system,passthru,shell_exec,proc_close,proc_open,dl,popen,show_source,posix_kill,posix_mkfifo,posix_getpwuid,posix_setpgid,posix_setsid,posix_setuid,posix_setgid,posix_seteuid,posix_setegid,posix_uname MySQL : OFF | cURL : ON | WGET : ON | Perl : ON | Python : OFF | Sudo : ON | Pkexec : ON Directory : /usr/local/mysql/mysql-test/suite/optimizer_unfixed_bugs/r/ |
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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; # 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); a 0 1 2 3 SET join_cache_level = 6; # 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); a 0 1 2 3 SET SESSION optimizer_switch = 'semijoin=off'; # 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); a 0 1 2 3 DROP TABLE t0, t1, t2;