set @save_optimizer_switch_jcl6=@@optimizer_switch; set @@optimizer_switch='semijoin=on,firstmatch=on,loosescan=on'; set @@optimizer_switch='semijoin_with_cache=on'; set @@optimizer_switch='outer_join_with_cache=on'; set @@optimizer_switch='join_cache_hashed=off'; set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on'; set join_cache_level=6; show variables like 'join_cache_level'; Variable_name Value join_cache_level 6 drop table if exists t0, t1, t2, t3, t4, t10, t11, t12; drop view if exists v1, v2; drop procedure if exists p1; set @subselect_sj_tmp= @@optimizer_switch; set optimizer_switch='semijoin=on,firstmatch=on,loosescan=on'; set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on'; set @save_optimizer_switch=@@optimizer_switch; create table t0 (a int); insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t1(a int, b int); insert into t1 values (0,0),(1,1),(2,2); create table t2 as select * from t1; create table t11(a int, b int); create table t10 (pk int, a int, primary key(pk)); insert into t10 select a,a from t0; create table t12 like t10; insert into t12 select * from t10; Flattened because of dependency, t10=func(t1) explain select * from t1 where a in (select pk from t10); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where 1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index select * from t1 where a in (select pk from t10); a b 0 0 1 1 2 2 A confluent case of dependency explain select * from t1 where a in (select a from t10 where pk=12); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables select * from t1 where a in (select a from t10 where pk=12); a b explain select * from t1 where a in (select a from t10 where pk=9); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t10 const PRIMARY PRIMARY 4 const 1 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where select * from t1 where a in (select a from t10 where pk=9); a b An empty table inside explain select * from t1 where a in (select a from t11); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables select * from t1 where a in (select a from t11); a b explain select * from t1 where a in (select pk from t10) and b in (select pk from t10); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where 1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index 1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 Using index select * from t1 where a in (select pk from t10) and b in (select pk from t10); a b 0 0 1 1 2 2 flattening a nested subquery explain select * from t1 where a in (select pk from t10 where t10.a in (select pk from t12)); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where 1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan 1 PRIMARY t12 eq_ref PRIMARY PRIMARY 4 test.t10.a 1 Using index select * from t1 where a in (select pk from t10 where t10.a in (select pk from t12)); a b 0 0 1 1 2 2 flattening subquery w/ several tables explain extended select * from t1 where a in (select t10.pk from t10, t12 where t12.pk=t10.a); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where 1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan 1 PRIMARY t12 eq_ref PRIMARY PRIMARY 4 test.t10.a 1 100.00 Using index Warnings: Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t10` join `test`.`t12` join `test`.`t1` where ((`test`.`t10`.`pk` = `test`.`t1`.`a`) and (`test`.`t12`.`pk` = `test`.`t10`.`a`)) subqueries within outer joins go into ON expr. explAin extended select * from t1 left join (t2 A, t2 B) on ( A.A= t1.A And B.A in (select pk from t10)); id select_type tABle type possiBle_keys key key_len ref rows filtered ExtrA 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY A ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer (flAt, BNL join) 1 PRIMARY B ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer (incrementAl, BNL join) 2 DEPENDENT SUBQUERY t10 unique_suBquery PRIMARY PRIMARY 4 func 1 100.00 Using index Warnings: Note 1003 select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`A`.`A` AS `A`,`test`.`A`.`B` AS `B`,`test`.`B`.`A` AS `A`,`test`.`B`.`B` AS `B` from `test`.`t1` left join (`test`.`t2` `A` join `test`.`t2` `B`) on((<in_optimizer>(`test`.`B`.`A`,<exists>(<primAry_index_lookup>(<cAche>(`test`.`B`.`A`) in t10 on PRIMARY))) And (`test`.`A`.`A` = `test`.`t1`.`A`))) where 1 t2 should be wrapped into OJ-nest, so we have "t1 LJ (t2 J t10)" explAin extended select * from t1 left join t2 on (t2.A= t1.A And t2.A in (select pk from t10)); id select_type tABle type possiBle_keys key key_len ref rows filtered ExtrA 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY t2 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join Buffer (flAt, BNL join) 2 DEPENDENT SUBQUERY t10 unique_suBquery PRIMARY PRIMARY 4 func 1 100.00 Using index Warnings: Note 1003 select `test`.`t1`.`A` AS `A`,`test`.`t1`.`B` AS `B`,`test`.`t2`.`A` AS `A`,`test`.`t2`.`B` AS `B` from `test`.`t1` left join `test`.`t2` on((<in_optimizer>(`test`.`t2`.`A`,<exists>(<primAry_index_lookup>(<cAche>(`test`.`t2`.`A`) in t10 on PRIMARY))) And (`test`.`t2`.`A` = `test`.`t1`.`A`))) where 1 we shouldn't flatten if we're going to get a join of > MAX_TABLES. explain select * from t1 s00, t1 s01, t1 s02, t1 s03, t1 s04,t1 s05,t1 s06,t1 s07,t1 s08,t1 s09, t1 s10, t1 s11, t1 s12, t1 s13, t1 s14,t1 s15,t1 s16,t1 s17,t1 s18,t1 s19, t1 s20, t1 s21, t1 s22, t1 s23, t1 s24,t1 s25,t1 s26,t1 s27,t1 s28,t1 s29, t1 s30, t1 s31, t1 s32, t1 s33, t1 s34,t1 s35,t1 s36,t1 s37,t1 s38,t1 s39, t1 s40, t1 s41, t1 s42, t1 s43, t1 s44,t1 s45,t1 s46,t1 s47,t1 s48,t1 s49 where s00.a in ( select m00.a from t1 m00, t1 m01, t1 m02, t1 m03, t1 m04,t1 m05,t1 m06,t1 m07,t1 m08,t1 m09, t1 m10, t1 m11, t1 m12, t1 m13, t1 m14,t1 m15,t1 m16,t1 m17,t1 m18,t1 m19 ); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY s00 ALL NULL NULL NULL NULL 3 Using where 1 PRIMARY s01 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) 1 PRIMARY s02 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s03 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s04 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s05 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s06 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s07 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s08 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s09 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s10 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s11 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s12 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s13 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s14 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s15 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s16 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s17 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s18 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s19 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s20 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s21 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s22 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s23 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s24 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s25 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s26 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s27 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s28 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s29 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s30 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s31 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s32 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s33 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s34 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s35 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s36 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s37 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s38 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s39 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s40 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s41 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s42 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s43 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s44 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s45 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s46 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s47 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s48 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 1 PRIMARY s49 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m00 ALL NULL NULL NULL NULL 3 Using where 2 DEPENDENT SUBQUERY m01 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join) 2 DEPENDENT SUBQUERY m02 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m03 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m04 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m05 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m06 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m07 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m08 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m09 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m10 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m11 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m12 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m13 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m14 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m15 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m16 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m17 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m18 ALL NULL NULL NULL NULL 3 Using join buffer (incremental, BNL join) 2 DEPENDENT SUBQUERY m19 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (incremental, BNL join) select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t10)) where t1.a < 5; a b a b 0 0 0 0 1 1 1 1 2 2 2 2 prepare s1 from ' select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t10)) where t1.a < 5'; execute s1; a b a b 0 0 0 0 1 1 1 1 2 2 2 2 execute s1; a b a b 0 0 0 0 1 1 1 1 2 2 2 2 insert into t1 select (A.a + 10 * B.a),1 from t0 A, t0 B; explain extended select * from t1 where a in (select pk from t10 where pk<3); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t10 range PRIMARY PRIMARY 4 NULL 4 100.00 Using where; Using index 1 PRIMARY t1 ALL NULL NULL NULL NULL 103 100.00 Using where; Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t10` join `test`.`t1` where ((`test`.`t1`.`a` = `test`.`t10`.`pk`) and (`test`.`t10`.`pk` < 3)) drop table t0, t1, t2; drop table t10, t11, t12; Bug#37899: Wrongly checked optimization prerequisite caused failed assertion. CREATE TABLE t1 ( `pk` int(11), `varchar_nokey` varchar(5) ); INSERT INTO t1 VALUES (1,'qk'),(2,'j'),(3,'aew'); SELECT * FROM t1 WHERE varchar_nokey IN ( SELECT varchar_nokey FROM t1 ) XOR pk = 30; pk varchar_nokey 1 qk 2 j 3 aew drop table t1; # # BUG#41842: Semi-join materialization strategy crashes when the upper query has HAVING # CREATE TABLE t1 ( pk int(11) NOT NULL AUTO_INCREMENT, int_nokey int(11) NOT NULL, time_key time NOT NULL, datetime_key datetime NOT NULL, datetime_nokey datetime NOT NULL, varchar_key varchar(1) NOT NULL, varchar_nokey varchar(1) NOT NULL, PRIMARY KEY (pk), KEY time_key (time_key), KEY datetime_key (datetime_key), KEY varchar_key (varchar_key) ); INSERT INTO t1 VALUES (1,0, '00:16:10','2008-09-03 14:25:40','2008-09-03 14:25:40','h','h'), (2,7, '00:00:00','2001-01-13 00:00:00','2001-01-13 00:00:00','',''), (3,0, '00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','x','x'), (4,2, '16:29:24','2000-10-16 01:39:08','2000-10-16 01:39:08','w','w'), (5,1, '09:23:32','0000-00-00 00:00:00','0000-00-00 00:00:00','p','p'), (6,3, '00:00:00','2007-12-02 00:00:00','2007-12-02 00:00:00','o','o'), (7,3, '00:00:00','2008-09-11 00:00:00','2008-09-11 00:00:00','',''), (8,0, '13:59:04','0000-00-00 00:00:00','0000-00-00 00:00:00','s','s'), (9,7, '09:01:06','0000-00-00 00:00:00','0000-00-00 00:00:00','d','d'), (10,5,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','n','n'), (11,0,'21:06:46','0000-00-00 00:00:00','0000-00-00 00:00:00','o','o'), (12,2,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','',''), (13,6,'14:45:34','2003-07-28 02:34:08','2003-07-28 02:34:08','w','w'), (14,1,'15:04:12','0000-00-00 00:00:00','0000-00-00 00:00:00','o','o'), (15,0,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','x','x'), (16,0,'15:55:23','2004-03-17 00:32:27','2004-03-17 00:32:27','p','p'), (17,1,'16:30:00','2004-12-27 19:20:00','2004-12-27 19:20:00','d','d'), (18,0,'00:00:00','0000-00-00 00:00:00','0000-00-00 00:00:00','h','h'), (19,0,'14:13:26','2008-11-09 05:53:48','2008-11-09 05:53:48','o','o'), (20,0,'00:00:00','2009-10-11 06:58:04','2009-10-11 06:58:04','k','k'); CREATE TABLE t2 ( pk int(11) NOT NULL AUTO_INCREMENT, int_nokey int(11) NOT NULL, time_key time NOT NULL, datetime_key datetime NOT NULL, datetime_nokey datetime NOT NULL, varchar_key varchar(1) NOT NULL, varchar_nokey varchar(1) NOT NULL, PRIMARY KEY (pk), KEY time_key (time_key), KEY datetime_key (datetime_key), KEY varchar_key (varchar_key) ); INSERT INTO t2 VALUES (10,0,'19:39:13','0000-00-00 00:00:00','0000-00-00 00:00:00','g','g'), (11,8,'03:43:53','0000-00-00 00:00:00','0000-00-00 00:00:00','b','b'); SELECT OUTR.datetime_nokey AS X FROM t1 AS OUTR WHERE OUTR.varchar_nokey IN (SELECT INNR . varchar_nokey AS Y FROM t2 AS INNR WHERE INNR . datetime_key >= INNR . time_key OR INNR . pk = INNR . int_nokey ) AND OUTR . varchar_nokey <= 'w' HAVING X > '2012-12-12'; X drop table t1, t2; # # Bug#45191: Incorrectly initialized semi-join led to a wrong result. # CREATE TABLE STAFF (EMPNUM CHAR(3) NOT NULL, EMPNAME CHAR(20), GRADE DECIMAL(4), CITY CHAR(15)); CREATE TABLE PROJ (PNUM CHAR(3) NOT NULL, PNAME CHAR(20), PTYPE CHAR(6), BUDGET DECIMAL(9), CITY CHAR(15)); CREATE TABLE WORKS (EMPNUM CHAR(3) NOT NULL, PNUM CHAR(3) NOT NULL, HOURS DECIMAL(5)); INSERT INTO STAFF VALUES ('E1','Alice',12,'Deale'); INSERT INTO STAFF VALUES ('E2','Betty',10,'Vienna'); INSERT INTO STAFF VALUES ('E3','Carmen',13,'Vienna'); INSERT INTO STAFF VALUES ('E4','Don',12,'Deale'); INSERT INTO STAFF VALUES ('E5','Ed',13,'Akron'); INSERT INTO PROJ VALUES ('P1','MXSS','Design',10000,'Deale'); INSERT INTO PROJ VALUES ('P2','CALM','Code',30000,'Vienna'); INSERT INTO PROJ VALUES ('P3','SDP','Test',30000,'Tampa'); INSERT INTO PROJ VALUES ('P4','SDP','Design',20000,'Deale'); INSERT INTO PROJ VALUES ('P5','IRM','Test',10000,'Vienna'); INSERT INTO PROJ VALUES ('P6','PAYR','Design',50000,'Deale'); INSERT INTO WORKS VALUES ('E1','P1',40); INSERT INTO WORKS VALUES ('E1','P2',20); INSERT INTO WORKS VALUES ('E1','P3',80); INSERT INTO WORKS VALUES ('E1','P4',20); INSERT INTO WORKS VALUES ('E1','P5',12); INSERT INTO WORKS VALUES ('E1','P6',12); INSERT INTO WORKS VALUES ('E2','P1',40); INSERT INTO WORKS VALUES ('E2','P2',80); INSERT INTO WORKS VALUES ('E3','P2',20); INSERT INTO WORKS VALUES ('E4','P2',20); INSERT INTO WORKS VALUES ('E4','P4',40); INSERT INTO WORKS VALUES ('E4','P5',80); set optimizer_switch=@save_optimizer_switch; set optimizer_switch='materialization=off'; explain SELECT EMPNUM, EMPNAME FROM STAFF WHERE EMPNUM IN (SELECT EMPNUM FROM WORKS WHERE PNUM IN (SELECT PNUM FROM PROJ)); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY STAFF ALL NULL NULL NULL NULL 5 1 PRIMARY PROJ ALL NULL NULL NULL NULL 6 Using join buffer (flat, BNL join) 1 PRIMARY WORKS ALL NULL NULL NULL NULL 12 Using where; FirstMatch(STAFF); Using join buffer (incremental, BNL join) SELECT EMPNUM, EMPNAME FROM STAFF WHERE EMPNUM IN (SELECT EMPNUM FROM WORKS WHERE PNUM IN (SELECT PNUM FROM PROJ)); EMPNUM EMPNAME E1 Alice E2 Betty E3 Carmen E4 Don set optimizer_switch=@save_optimizer_switch; drop table STAFF,WORKS,PROJ; # End of bug#45191 # # Bug#46550 Azalea returning duplicate results for some IN subqueries # w/ semijoin=on # DROP TABLE IF EXISTS t0, t1, t2; CREATE TABLE t0 ( int_key int(11) DEFAULT NULL, varchar_key varchar(1) DEFAULT NULL, varchar_nokey varchar(1) DEFAULT NULL, KEY int_key (int_key), KEY varchar_key (varchar_key,int_key) ); INSERT INTO t0 VALUES (1,'m','m'), (40,'h','h'), (1,'r','r'), (1,'h','h'), (9,'x','x'), (NULL,'q','q'), (NULL,'k','k'), (7,'l','l'), (182,'k','k'), (202,'a','a'), (7,'x','x'), (6,'j','j'), (119,'z','z'), (4,'d','d'), (5,'h','h'), (1,'u','u'), (3,'q','q'), (7,'a','a'), (3,'e','e'), (6,'l','l'); CREATE TABLE t1 ( int_key int(11) DEFAULT NULL, varchar_key varchar(1) DEFAULT NULL, varchar_nokey varchar(1) DEFAULT NULL, KEY int_key (int_key), KEY varchar_key (varchar_key,int_key) ); INSERT INTO t1 VALUES (7,NULL,NULL),(4,'x','x'); CREATE TABLE t2 ( int_key int(11) DEFAULT NULL, varchar_key varchar(1) DEFAULT NULL, varchar_nokey varchar(1) DEFAULT NULL, KEY int_key (int_key), KEY varchar_key (varchar_key,int_key) ); INSERT INTO t2 VALUES (123,NULL,NULL); SELECT int_key FROM t0 WHERE varchar_nokey IN ( SELECT t1 .varchar_key from t1 ); int_key 9 7 DROP TABLE t0, t1, t2; # End of bug#46550 # # Bug #46744 Crash in optimize_semijoin_nests on empty view # with limit and procedure. # DROP TABLE IF EXISTS t1, t2; DROP VIEW IF EXISTS v1; DROP PROCEDURE IF EXISTS p1; CREATE TABLE t1 ( f1 int ); CREATE TABLE t2 ( f1 int ); insert into t2 values (5), (7); CREATE OR REPLACE VIEW v1 AS SELECT * FROM t1 LIMIT 2; create procedure p1() select COUNT(*) FROM v1 WHERE f1 IN (SELECT f1 FROM t2 WHERE f1 = ANY (SELECT f1 FROM v1)); SET SESSION optimizer_switch = 'semijoin=on'; CALL p1(); COUNT(*) 0 SET SESSION optimizer_switch = 'semijoin=off'; CALL p1(); COUNT(*) 0 drop table t1, t2; drop view v1; drop procedure p1; set SESSION optimizer_switch=@save_optimizer_switch; # End of bug#46744 Bug#46797 "Crash in fix_semijoin_strategies_for_picked_join_order with semijoin=on" CREATE TABLE t1 ( varchar_key varchar(1) DEFAULT NULL, KEY varchar_key (varchar_key) ); CREATE TABLE t2 ( varchar_key varchar(1) DEFAULT NULL, KEY varchar_key (varchar_key) ); INSERT INTO t2 VALUES (NULL),(NULL),(NULL),(NULL),('a'),('a'),('a'),('b'),('b'),('b'),('b'),('c'), ('c'),('c'),('c'),('c'),('c'),('c'),('d'),('d'),('d'),('d'),('d'),('d'),('e'), ('e'),('e'),('e'),('e'),('e'),('f'),('f'),('f'),('g'),('g'),('h'),('h'),('h'), ('h'),('i'),('j'),('j'),('j'),('k'),('k'),('l'),('l'),('m'),('m'),('m'),('m'), ('n'),('n'),('n'),('o'),('o'),('o'),('p'),('p'),('p'),('q'),('q'),('q'),('r'), ('r'),('r'),('r'),('s'),('s'),('s'),('s'),('t'),('t'),('t'),('t'),('u'),('u'), ('u'),('u'),('v'),('v'),('v'),('v'),('w'),('w'),('w'),('w'),('w'),('w'),('x'), ('x'),('x'),('y'),('y'),('y'),('y'),('z'),('z'),('z'),('z'); CREATE TABLE t3 ( varchar_key varchar(1) DEFAULT NULL, KEY varchar_key (varchar_key) ) ENGINE=MyISAM DEFAULT CHARSET=latin1; INSERT INTO t3 VALUES (NULL),('c'),('d'),('e'),('f'),('h'),('j'),('k'),('k'),('m'),('m'),('m'), ('n'),('o'),('r'),('t'),('t'),('u'),('w'),('y'); SELECT varchar_key FROM t3 WHERE (SELECT varchar_key FROM t3 WHERE (varchar_key,varchar_key) IN (SELECT t1.varchar_key, t2 .varchar_key FROM t1 RIGHT JOIN t2 ON t1.varchar_key ) ); varchar_key DROP TABLE t1, t2, t3; # # Bug#46556 Returning incorrect, empty results for some IN subqueries # w/semijoin=on # CREATE TABLE t0 ( pk INTEGER, vkey VARCHAR(1), vnokey VARCHAR(1), PRIMARY KEY (pk), KEY vkey(vkey) ); INSERT INTO t0 VALUES (1,'g','g'), (2,'v','v'), (3,'t','t'), (4,'u','u'), (5,'n','n'); EXPLAIN EXTENDED SELECT vkey FROM t0 WHERE pk IN (SELECT t1.pk FROM t0 t1 JOIN t0 t2 ON t2.vkey = t1.vnokey); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t0 ALL PRIMARY NULL NULL NULL 5 100.00 1 PRIMARY t1 eq_ref PRIMARY PRIMARY 4 test.t0.pk 1 100.00 Using where; Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan 1 PRIMARY t2 ref vkey vkey 4 test.t1.vnokey 2 100.00 Using index; FirstMatch(t1) Warnings: Note 1003 select `test`.`t0`.`vkey` AS `vkey` from `test`.`t0` `t1` semi join (`test`.`t0` `t2`) join `test`.`t0` where ((`test`.`t2`.`vkey` = `test`.`t1`.`vnokey`) and (`test`.`t1`.`pk` = `test`.`t0`.`pk`)) SELECT vkey FROM t0 WHERE pk IN (SELECT t1.pk FROM t0 t1 JOIN t0 t2 ON t2.vkey = t1.vnokey); vkey g v t u n DROP TABLE t0; # End of bug#46556 Bug #48073 Subquery on char columns from view crashes Mysql DROP TABLE IF EXISTS t1, t2; DROP VIEW IF EXISTS v1; CREATE TABLE t1 ( city VARCHAR(50) NOT NULL, country_id SMALLINT UNSIGNED NOT NULL ); INSERT INTO t1 VALUES ('Batna',2), ('Bchar',2), ('Skikda',2), ('Tafuna',3), ('Algeria',2) ; CREATE TABLE t2 ( country_id SMALLINT UNSIGNED NOT NULL, country VARCHAR(50) NOT NULL ); INSERT INTO t2 VALUES (2,'Algeria'), (3,'American Samoa') ; CREATE VIEW v1 AS SELECT country_id, country FROM t2 WHERE LEFT(country,1) = "A" ; SELECT city, country_id FROM t1 WHERE city IN ( SELECT country FROM t2 WHERE LEFT(country, 1) = "A" ); city country_id Algeria 2 SELECT city, country_id FROM t1 WHERE city IN ( SELECT country FROM v1 ); city country_id Algeria 2 drop table t1, t2; drop view v1; # End of bug#48073 Bug#48834: Procedure with view + subquery + semijoin=on crashes on second call. SET SESSION optimizer_switch ='semijoin=on'; CREATE TABLE t1 ( t1field integer, primary key (t1field)); CREATE TABLE t2 ( t2field integer, primary key (t2field)); CREATE VIEW v1 AS SELECT t1field as v1field FROM t1 A WHERE A.t1field IN (SELECT t1field FROM t2 ); CREATE VIEW v2 AS SELECT t2field as v2field FROM t2 A WHERE A.t2field IN (SELECT t2field FROM t2 ); CREATE PROCEDURE p1 () BEGIN SELECT v1field FROM v1 WHERE v1field IN ( SELECT v2field as vf_inner FROM v2 ); END| INSERT INTO t1 VALUES (1),(2),(3); INSERT INTO t2 VALUES (2),(3),(4); CALL p1; v1field 2 3 CALL p1; v1field 2 3 DROP TABLE t1,t2; DROP VIEW v1,v2; DROP PROCEDURE p1; set SESSION optimizer_switch=@save_optimizer_switch; # End of BUG#48834 Bug#49097 subquery with view generates wrong result with non-prepared statement DROP TABLE IF EXISTS t1, t2; DROP VIEW IF EXISTS v1; CREATE TABLE t1 ( city VARCHAR(50) NOT NULL, country_id SMALLINT UNSIGNED NOT NULL ); INSERT INTO t1 VALUES ('Batna',2), ('Bchar',2), ('Skikda',2), ('Tafuna',3), ('Algeria',2) ; CREATE TABLE t2 ( country_id SMALLINT UNSIGNED NOT NULL, country VARCHAR(50) NOT NULL ); INSERT INTO t2 VALUES (2,'Algeria'), (3,'XAmerican Samoa') ; CREATE VIEW v1 AS SELECT country_id, country FROM t2 WHERE LEFT(country,1) = "A" ; SELECT city, country_id FROM t1 WHERE country_id IN ( SELECT country_id FROM t2 WHERE LEFT(country,1) = "A" ); city country_id Batna 2 Bchar 2 Skikda 2 Algeria 2 SELECT city, country_id FROM t1 WHERE country_id IN ( SELECT country_id FROM v1 ); city country_id Batna 2 Bchar 2 Skikda 2 Algeria 2 PREPARE stmt FROM " SELECT city, country_id FROM t1 WHERE country_id IN ( SELECT country_id FROM v1 ); "; execute stmt; city country_id Batna 2 Bchar 2 Skikda 2 Algeria 2 deallocate prepare stmt; drop table t1, t2; drop view v1; # End of Bug#49097 # # BUG#38075: Wrong result: rows matching a subquery with outer join not returned # DROP TABLE IF EXISTS ot1, it1, it2; CREATE TABLE it2 ( int_key int(11) NOT NULL, datetime_key datetime NOT NULL, KEY int_key (int_key), KEY datetime_key (datetime_key) ); INSERT INTO it2 VALUES (5,'2002-04-10 14:25:30'), (0,'0000-00-00 00:00:00'), (0,'2006-09-14 04:01:02'), (4,'0000-00-00 00:00:00'), (8,'0000-00-00 00:00:00'), (5,'0000-00-00 00:00:00'), (9,'0000-00-00 00:00:00'), (8,'2007-04-01 11:04:17'), (1,'0000-00-00 00:00:00'), (7,'2009-01-12 00:00:00'), (0,'2009-06-05 00:00:00'), (3,'2006-02-14 18:06:35'), (5,'2006-02-21 07:08:16'), (0,'0000-00-00 00:00:00'), (7,'0000-00-00 00:00:00'), (0,'0000-00-00 00:00:00'), (0,'2007-02-13 00:00:00'), (1,'0000-00-00 00:00:00'), (0,'0000-00-00 00:00:00'), (1,'2003-08-11 00:00:00'); CREATE TABLE ot1 ( int_nokey int(11) NOT NULL, int_key int(11) NOT NULL, KEY int_key (int_key) ); INSERT INTO ot1 VALUES (5,0), (3,0), (0,2), (3,0), (1,3), (0,0), (1,7), (7,0), (1,7), (0,7), (0,9), (8,2), (4,4), (9,3), (0,9), (2,5), (0,5), (8,0), (5,8), (1,5); CREATE TABLE it1 ( int_nokey int(11) NOT NULL, int_key int(11) NOT NULL, KEY int_key (int_key) ); INSERT INTO it1 VALUES (9,5), (0,4); SELECT int_key FROM ot1 WHERE int_nokey IN (SELECT it2.int_key FROM it1 LEFT JOIN it2 ON it2.datetime_key); int_key 0 2 0 7 9 9 5 2 0 0 0 3 7 7 8 0 5 EXPLAIN SELECT int_key FROM ot1 WHERE int_nokey IN (SELECT it2.int_key FROM it1 LEFT JOIN it2 ON it2.datetime_key); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY it1 index NULL int_key 4 NULL 2 Using index; Start temporary 1 PRIMARY ot1 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join) 1 PRIMARY it2 ALL NULL NULL NULL NULL 20 Using where; End temporary; Using join buffer (incremental, BNL join) DROP TABLE ot1, it1, it2; # End of BUG#38075 # # BUG#31480: Incorrect result for nested subquery when executed via semi join # create table t1 (a int not null, b int not null); create table t2 (c int not null, d int not null); create table t3 (e int not null); insert into t1 values (1,10); insert into t1 values (2,10); insert into t1 values (1,20); insert into t1 values (2,20); insert into t1 values (3,20); insert into t1 values (2,30); insert into t1 values (4,40); insert into t2 values (2,10); insert into t2 values (2,20); insert into t2 values (4,10); insert into t2 values (5,10); insert into t2 values (3,20); insert into t2 values (2,40); insert into t3 values (10); insert into t3 values (30); insert into t3 values (10); insert into t3 values (20); explain extended select a from t1 where a in (select c from t2 where d >= some(select e from t3 where b=e)); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 6 100.00 Start temporary 1 PRIMARY t1 ALL NULL NULL NULL NULL 7 100.00 Using where; End temporary; Using join buffer (flat, BNL join) 3 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where Warnings: Note 1276 Field or reference 'test.t1.b' of SELECT #3 was resolved in SELECT #1 Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t1`.`a` = `test`.`t2`.`c`) and <nop>(<expr_cache><`test`.`t2`.`d`,`test`.`t1`.`b`>(<in_optimizer>(`test`.`t2`.`d`,<exists>(select `test`.`t3`.`e` from `test`.`t3` where ((`test`.`t1`.`b` = `test`.`t3`.`e`) and (<cache>(`test`.`t2`.`d`) >= `test`.`t3`.`e`))))))) show warnings; Level Code Message Note 1276 Field or reference 'test.t1.b' of SELECT #3 was resolved in SELECT #1 Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t1`.`a` = `test`.`t2`.`c`) and <nop>(<expr_cache><`test`.`t2`.`d`,`test`.`t1`.`b`>(<in_optimizer>(`test`.`t2`.`d`,<exists>(select `test`.`t3`.`e` from `test`.`t3` where ((`test`.`t1`.`b` = `test`.`t3`.`e`) and (<cache>(`test`.`t2`.`d`) >= `test`.`t3`.`e`))))))) select a from t1 where a in (select c from t2 where d >= some(select e from t3 where b=e)); a 2 2 3 2 drop table t1, t2, t3; # # Bug#48213 Materialized subselect crashes if using GEOMETRY type # CREATE TABLE t1 ( pk int, a varchar(1), b varchar(4), c tinyblob, d blob, e mediumblob, f longblob, g tinytext, h text, i mediumtext, j longtext, k geometry, PRIMARY KEY (pk) ); INSERT INTO t1 VALUES (1,'o','ffff','ffff','ffoo','ffff','ffff','ffff','ffff','ffff','ffff',GeomFromText('POLYGON((0 0, 0 2, 2 2, 2 0, 0 0))')), (2,'f','ffff','ffff','ffff', 'ffff','ffff','ffff','ffff','ffff','ffff',GeomFromText('POLYGON((0 0, 0 2, 2 2, 2 0, 0 0))')); CREATE TABLE t2 LIKE t1; INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii','iiii','ffff','ffff','ffff','ffff','ffff',GeomFromText('POLYGON((0 0, 0 2, 2 2, 2 0, 0 0))')), (2,'f','ffff','ffff','ffff','ffff','ffff','ffff','ffff','ffff','ffff',GeomFromText('POLYGON((0 0, 0 2, 2 2, 2 0, 0 0))')); EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (a, b) IN (SELECT a, b FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (a, b) IN (SELECT a, b FROM t2 WHERE pk > 0); pk 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, c) IN (SELECT b, c FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`c` = `test`.`t1`.`c`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, c) IN (SELECT b, c FROM t2 WHERE pk > 0); pk 1 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, d) IN (SELECT b, d FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`d` = `test`.`t1`.`d`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, d) IN (SELECT b, d FROM t2 WHERE pk > 0); pk 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, e) IN (SELECT b, e FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`e` = `test`.`t1`.`e`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, e) IN (SELECT b, e FROM t2 WHERE pk > 0); pk 1 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, f) IN (SELECT b, f FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`f` = `test`.`t1`.`f`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, f) IN (SELECT b, f FROM t2 WHERE pk > 0); pk 1 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, g) IN (SELECT b, g FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`g` = `test`.`t1`.`g`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, g) IN (SELECT b, g FROM t2 WHERE pk > 0); pk 1 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, h) IN (SELECT b, h FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`h` = `test`.`t1`.`h`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, h) IN (SELECT b, h FROM t2 WHERE pk > 0); pk 1 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, i) IN (SELECT b, i FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`i` = `test`.`t1`.`i`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, i) IN (SELECT b, i FROM t2 WHERE pk > 0); pk 1 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, j) IN (SELECT b, j FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`j` = `test`.`t1`.`j`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, j) IN (SELECT b, j FROM t2 WHERE pk > 0); pk 1 2 EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (b, k) IN (SELECT b, k FROM t2 WHERE pk > 0); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 1 PRIMARY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using where; Rowid-ordered scan; FirstMatch(t1); Using join buffer (flat, BNL join) Warnings: Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`k` = `test`.`t1`.`k`) and (`test`.`t2`.`b` = `test`.`t1`.`b`) and (`test`.`t2`.`pk` > 0)) SELECT pk FROM t1 WHERE (b, k) IN (SELECT b, k FROM t2 WHERE pk > 0); pk 1 2 DROP TABLE t1, t2; # End of Bug#48213 # # Bug#49198 Wrong result for second call of procedure # with view in subselect. # CREATE TABLE t1 (t1field integer, primary key (t1field)); CREATE TABLE t2 (t2field integer, primary key (t2field)); CREATE TABLE t3 (t3field integer, primary key (t3field)); CREATE VIEW v2 AS SELECT * FROM t2; CREATE VIEW v3 AS SELECT * FROM t3; INSERT INTO t1 VALUES(1),(2); INSERT INTO t2 VALUES(1),(2); INSERT INTO t3 VALUES(1),(2); PREPARE stmt FROM " SELECT t1field FROM t1 WHERE t1field IN (SELECT * FROM v2); "; EXECUTE stmt; t1field 1 2 EXECUTE stmt; t1field 1 2 PREPARE stmt FROM " EXPLAIN SELECT t1field FROM t1 WHERE t1field IN (SELECT * FROM v2) AND t1field IN (SELECT * FROM v3) "; EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 2 Using index 1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t1.t1field 1 Using index 1 PRIMARY t3 eq_ref PRIMARY PRIMARY 4 test.t1.t1field 1 Using index EXECUTE stmt; id select_type table type possible_keys key key_len ref rows Extra 1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 2 Using index 1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.t1field 1 Using index 1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.t1field 1 Using index DROP TABLE t1, t2, t3; DROP VIEW v2, v3; # End of Bug#49198 # # Bug#45174: Incorrectly applied equality propagation caused wrong # result on a query with a materialized semi-join. # CREATE TABLE `t1` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `varchar_key` varchar(1) NOT NULL, `varchar_nokey` varchar(1) NOT NULL, PRIMARY KEY (`pk`), KEY `varchar_key` (`varchar_key`) ); INSERT INTO `t1` VALUES (11,'m','m'),(12,'j','j'),(13,'z','z'),(14,'a','a'),(15,'',''),(16,'e','e'),(17,'t','t'),(19,'b','b'),(20,'w','w'),(21,'m','m'),(23,'',''),(24,'w','w'),(26,'e','e'),(27,'e','e'),(28,'p','p'); CREATE TABLE `t2` ( `varchar_nokey` varchar(1) NOT NULL ); INSERT INTO `t2` VALUES ('v'),('u'),('n'),('l'),('h'),('u'),('n'),('j'),('k'),('e'),('i'),('u'),('n'),('b'),('x'),(''),('q'),('u'); EXPLAIN EXTENDED SELECT varchar_nokey FROM t2 WHERE ( `varchar_nokey` , `varchar_nokey` ) IN ( SELECT `varchar_key` , `varchar_nokey` FROM t1 WHERE `varchar_nokey` < 'n' XOR `pk` ) ; id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 18 100.00 1 PRIMARY t1 ref varchar_key varchar_key 3 test.t2.varchar_nokey 2 100.00 Using where; FirstMatch(t2); Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan Warnings: Note 1003 select `test`.`t2`.`varchar_nokey` AS `varchar_nokey` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`varchar_key` = `test`.`t2`.`varchar_nokey`) and (`test`.`t1`.`varchar_nokey` = `test`.`t2`.`varchar_nokey`) and ((`test`.`t2`.`varchar_nokey` < 'n') xor `test`.`t1`.`pk`)) SELECT varchar_nokey FROM t2 WHERE ( `varchar_nokey` , `varchar_nokey` ) IN ( SELECT `varchar_key` , `varchar_nokey` FROM t1 WHERE `varchar_nokey` < 'n' XOR `pk` ) ; varchar_nokey DROP TABLE t1, t2; # End of the test for bug#45174. # # BUG#43768: Prepared query with nested subqueries core dumps on second execution # create table t1 ( id int(11) unsigned not null primary key auto_increment, partner_id varchar(35) not null, t1_status_id int(10) unsigned ); insert into t1 values ("1", "partner1", "10"), ("2", "partner2", "10"), ("3", "partner3", "10"), ("4", "partner4", "10"); create table t2 ( id int(11) unsigned not null default '0', t1_line_id int(11) unsigned not null default '0', article_id varchar(20), sequence int(11) not null default '0', primary key (id,t1_line_id) ); insert into t2 values ("1", "1", "sup", "0"), ("2", "1", "sup", "1"), ("2", "2", "sup", "2"), ("2", "3", "sup", "3"), ("2", "4", "imp", "4"), ("3", "1", "sup", "0"), ("4", "1", "sup", "0"); create table t3 ( id int(11) not null default '0', preceeding_id int(11) not null default '0', primary key (id,preceeding_id) ); create table t4 ( user_id varchar(50) not null, article_id varchar(20) not null, primary key (user_id,article_id) ); insert into t4 values("nicke", "imp"); prepare stmt from 'select t1.partner_id from t1 where t1.id in ( select pl_inner.id from t2 as pl_inner where pl_inner.article_id in ( select t4.article_id from t4 where t4.user_id = \'nicke\' ) )'; execute stmt; partner_id partner2 execute stmt; partner_id partner2 drop table t1,t2,t3,t4; # # Bug#48623 Multiple subqueries are optimized incorrectly # CREATE TABLE t1(val VARCHAR(10)); CREATE TABLE t2(val VARCHAR(10)); CREATE TABLE t3(val VARCHAR(10)); INSERT INTO t1 VALUES('aaa'), ('bbb'), ('eee'), ('mmm'), ('ppp'); INSERT INTO t2 VALUES('aaa'), ('aaa'), ('bbb'), ('eee'), ('mmm'), ('ppp'); INSERT INTO t3 VALUES('aaa'), ('bbb'), ('eee'), ('mmm'), ('ppp'); EXPLAIN SELECT * FROM t1 WHERE t1.val IN (SELECT t2.val FROM t2 WHERE t2.val LIKE 'a%' OR t2.val LIKE 'e%') AND t1.val IN (SELECT t3.val FROM t3 WHERE t3.val LIKE 'a%' OR t3.val LIKE 'e%'); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Start temporary 1 PRIMARY t3 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join) 1 PRIMARY t2 ALL NULL NULL NULL NULL 6 Using where; End temporary; Using join buffer (incremental, BNL join) SELECT * FROM t1 WHERE t1.val IN (SELECT t2.val FROM t2 WHERE t2.val LIKE 'a%' OR t2.val LIKE 'e%') AND t1.val IN (SELECT t3.val FROM t3 WHERE t3.val LIKE 'a%' OR t3.val LIKE 'e%'); val aaa eee DROP TABLE t1; DROP TABLE t2; DROP TABLE t3; # End of Bug#48623 # # LPBUG#602574: RQG: sql_select.cc:5385: bool greedy_search(JOIN*, table_map, uint, # uint): Assertion `join->best_read < # set @save_optimizer_switch=@@optimizer_switch; set optimizer_switch='materialization=off'; CREATE TABLE t1 ( varchar_key varchar(1) DEFAULT NULL, KEY varchar_key (varchar_key) ); CREATE TABLE t2 ( varchar_key varchar(1) DEFAULT NULL, KEY varchar_key (varchar_key) ); INSERT INTO t2 VALUES (NULL),(NULL),(NULL),(NULL),('a'),('a'),('a'),('b'),('b'),('b'),('b'),('c'), ('c'),('c'),('c'),('c'),('c'),('c'),('d'),('d'),('d'),('d'),('d'),('d'),('e'), ('e'),('e'),('e'),('e'),('e'),('f'),('f'),('f'),('g'),('g'),('h'),('h'),('h'), ('h'),('i'),('j'),('j'),('j'),('k'),('k'),('l'),('l'),('m'),('m'),('m'),('m'), ('n'),('n'),('n'),('o'),('o'),('o'),('p'),('p'),('p'),('q'),('q'),('q'),('r'), ('r'),('r'),('r'),('s'),('s'),('s'),('s'),('t'),('t'),('t'),('t'),('u'),('u'), ('u'),('u'),('v'),('v'),('v'),('v'),('w'),('w'),('w'),('w'),('w'),('w'),('x'), ('x'),('x'),('y'),('y'),('y'),('y'),('z'),('z'),('z'),('z'); CREATE TABLE t3 ( varchar_key varchar(1) DEFAULT NULL, KEY varchar_key (varchar_key) ) ENGINE=MyISAM DEFAULT CHARSET=latin1; INSERT INTO t3 VALUES (NULL),('c'),('d'),('e'),('f'),('h'),('j'),('k'),('k'),('m'),('m'),('m'), ('n'),('o'),('r'),('t'),('t'),('u'),('w'),('y'); SELECT varchar_key FROM t3 WHERE (SELECT varchar_key FROM t3 WHERE (varchar_key,varchar_key) IN (SELECT t1.varchar_key, t2 .varchar_key FROM t1 RIGHT JOIN t2 ON t1.varchar_key ) ); varchar_key set optimizer_switch=@save_optimizer_switch; DROP TABLE t1, t2, t3; # # Bug#46692 "Crash occurring on queries with nested FROM subqueries # using materialization." # CREATE TABLE t1 ( pk INTEGER PRIMARY KEY, int_key INTEGER, KEY int_key(int_key) ); INSERT INTO t1 VALUES (10,186),(11,NULL),(12,2),(13,3),(14,0),(15,133),(16,1); CREATE TABLE t2 ( pk INTEGER PRIMARY KEY, int_key INTEGER, KEY int_key(int_key) ); INSERT INTO t2 VALUES (1,7),(2,2); SELECT * FROM t1 WHERE (140, 4) IN (SELECT t2.int_key, t2 .pk FROM t2 STRAIGHT_JOIN t1 ON t2.int_key); pk int_key DROP TABLE t1, t2; # # Bug#42353 "SELECT ... WHERE oe IN (SELECT w/ LEFT JOIN) query # causes crash." # CREATE TABLE t1 ( pk INTEGER PRIMARY KEY, int_nokey INTEGER, int_key INTEGER, date_key DATE, datetime_nokey DATETIME, varchar_nokey VARCHAR(1) ); CREATE TABLE t2 ( date_nokey DATE ); CREATE TABLE t3 ( pk INTEGER PRIMARY KEY, int_nokey INTEGER, date_key date, varchar_key VARCHAR(1), varchar_nokey VARCHAR(1), KEY date_key (date_key) ); SELECT date_key FROM t1 WHERE (int_key, int_nokey) IN (SELECT t3.int_nokey, t3.pk FROM t2 LEFT JOIN t3 ON (t2.date_nokey < t3.date_key) WHERE t3.varchar_key <= t3.varchar_nokey OR t3.int_nokey <= t3.pk ) AND (varchar_nokey <> 'f' OR NOT int_key < 7); date_key # # Bug#45933 "Crash in optimize_semijoin_nests on JOIN in subquery # + AND in outer query". # INSERT INTO t1 VALUES (10,7,5,'2009-06-16','2002-04-10 14:25:30','w'), (11,7,0,'0000-00-00','0000-00-00 00:00:00','s'), (12,4,0,'2003-07-14','2006-09-14 04:01:02','y'), (13,0,4,'2002-07-25','0000-00-00 00:00:00','c'), (14,1,8,'2007-07-03','0000-00-00 00:00:00','q'), (15,6,5,'2001-11-12','0000-00-00 00:00:00',''), (16,2,9,'0000-00-00','0000-00-00 00:00:00','j'), (29,9,1,'0000-00-00','2003-08-11 00:00:00','m'); INSERT INTO t3 VALUES (1,9,'0000-00-00','b','b'), (2,2,'2002-09-17','h','h'); SELECT t1.varchar_nokey FROM t1 JOIN t3 ON t1.datetime_nokey WHERE t1.varchar_nokey IN (SELECT varchar_nokey FROM t1 WHERE (pk) IN (SELECT t3.int_nokey FROM t3 LEFT JOIN t1 ON t1.varchar_nokey WHERE t3.date_key BETWEEN '2008-06-07' AND '2006-06-26' ) ); varchar_nokey DROP TABLE t1, t2, t3; # # Bug#45219 "Crash on SELECT DISTINCT query containing a # LEFT JOIN in subquery" # CREATE TABLE t1 ( pk INTEGER NOT NULL, int_nokey INTEGER NOT NULL, datetime_key DATETIME NOT NULL, varchar_key VARCHAR(1) NOT NULL, PRIMARY KEY (pk), KEY datetime_key (datetime_key), KEY varchar_key (varchar_key) ); INSERT INTO t1 VALUES (1,9,'0000-00-00 00:00:00','p'),(2,0,'2002-02-09 07:38:13','v'), (3,8,'2001-05-03 12:08:14','t'),(4,3,'0000-00-00 00:00:00','u'), (5,7,'2009-07-28 03:43:30','n'),(6,0,'2009-08-04 00:00:00','l'), (7,1,'0000-00-00 00:00:00','h'),(8,9,'0000-00-00 00:00:00','u'), (9,0,'2005-08-02 17:16:54','n'),(10,9,'2002-12-21 00:00:00','j'), (11,0,'2005-08-15 12:37:35','k'),(12,5,'0000-00-00 00:00:00','e'), (13,0,'2006-03-10 00:00:00','i'),(14,8,'2005-05-16 11:02:36','u'), (15,8,'2008-11-02 00:00:00','n'),(16,5,'2006-03-15 00:00:00','b'), (17,1,'0000-00-00 00:00:00','x'),(18,7,'0000-00-00 00:00:00',''), (19,0,'2008-12-17 20:15:40','q'),(20,9,'0000-00-00 00:00:00','u'); CREATE TABLE t2 LIKE t1; INSERT INTO t2 VALUES (10,0,'2006-07-07 07:26:28','q'),(11,5,'2002-09-23 00:00:00','m'), (12,7,'0000-00-00 00:00:00','j'),(13,1,'2006-06-07 00:00:00','z'), (14,8,'2000-09-16 12:15:34','a'),(15,2,'2007-08-05 15:47:52',''), (16,1,'0000-00-00 00:00:00','e'),(17,8,'2005-12-02 19:34:26','t'), (18,5,'0000-00-00 00:00:00','q'),(19,4,'0000-00-00 00:00:00','b'), (20,5,'2007-12-28 00:00:00','w'),(21,3,'2004-08-02 11:48:43','m'), (22,0,'0000-00-00 00:00:00','x'),(23,8,'2004-04-19 12:18:43',''), (24,0,'2009-04-27 00:00:00','w'),(25,4,'2006-10-20 14:52:15','x'), (26,0,'0000-00-00 00:00:00','e'),(27,0,'2002-03-22 11:48:37','e'), (28,2,'0000-00-00 00:00:00','p'),(29,0,'2001-01-04 03:55:07','x'); CREATE TABLE t3 LIKE t1; INSERT INTO t3 VALUES (10,8,'2007-08-19 08:08:38','i'),(11,0,'2000-05-21 03:51:51',''); SELECT DISTINCT datetime_key FROM t1 WHERE (int_nokey, pk) IN (SELECT t3.pk, t3.pk FROM t2 LEFT JOIN t3 ON t3.varchar_key) AND pk = 9; datetime_key DROP TABLE t1, t2, t3; # # BUG#784723: Wrong result with semijoin + nested subqueries in maria-5.3 # CREATE TABLE t1 ( t1field integer, primary key (t1field)); CREATE TABLE t2 ( t2field integer, primary key (t2field)); INSERT INTO t1 VALUES (1),(2),(3); INSERT INTO t2 VALUES (2),(3),(4); explain SELECT * FROM t1 A WHERE A.t1field IN (SELECT A.t1field FROM t2 B) AND A.t1field IN (SELECT C.t2field FROM t2 C WHERE C.t2field IN (SELECT D.t2field FROM t2 D)); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY A index PRIMARY PRIMARY 4 NULL 3 Using index; Start temporary 1 PRIMARY B index NULL PRIMARY 4 NULL 3 Using index; End temporary; Using join buffer (flat, BNL join) 1 PRIMARY C eq_ref PRIMARY PRIMARY 4 test.A.t1field 1 Using index 1 PRIMARY D eq_ref PRIMARY PRIMARY 4 test.A.t1field 1 Using index SELECT * FROM t1 A WHERE A.t1field IN (SELECT A.t1field FROM t2 B) AND A.t1field IN (SELECT C.t2field FROM t2 C WHERE C.t2field IN (SELECT D.t2field FROM t2 D)); t1field 2 3 drop table t1,t2; # # BUG#787299: Valgrind complains on a join query with two IN subqueries # create table t1 (a int); insert into t1 values (1), (2), (3); create table t2 as select * from t1; select * from t1 A, t1 B where A.a = B.a and A.a in (select a from t2 C) and B.a in (select a from t2 D); a a 1 1 2 2 3 3 explain select * from t1 A, t1 B where A.a = B.a and A.a in (select a from t2 C) and B.a in (select a from t2 D); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY A ALL NULL NULL NULL NULL 3 Start temporary 1 PRIMARY B ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join) 1 PRIMARY C ALL NULL NULL NULL NULL 3 Using where; Using join buffer (incremental, BNL join) 1 PRIMARY D ALL NULL NULL NULL NULL 3 Using where; End temporary; Using join buffer (incremental, BNL join) drop table t1, t2; # # BUG#784441: Abort on semijoin with a view as the inner table # CREATE TABLE t1 (a int) ; INSERT INTO t1 VALUES (1), (1); CREATE TABLE t2 (a int) ; INSERT INTO t2 VALUES (1), (1); CREATE VIEW v1 AS SELECT 1; EXPLAIN SELECT * FROM t1 INNER JOIN t2 ON t2.a != 0 AND t2.a IN (SELECT * FROM v1); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) 2 DEPENDENT SUBQUERY <derived3> ALL NULL NULL NULL NULL 2 Using where 3 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used SELECT * FROM t1 INNER JOIN t2 ON t2.a != 0 AND t2.a IN (SELECT * FROM v1); a a 1 1 1 1 1 1 1 1 DROP VIEW v1; DROP TABLE t1,t2; # # BUG#751439 Assertion `!table->file || table->file->inited == handler::NONE' failed with subquery # CREATE TABLE t1 ( f10 int, f11 int) ; INSERT IGNORE INTO t1 VALUES (0,0),(0,0); CREATE TABLE t2 ( f11 int); INSERT IGNORE INTO t2 VALUES (0),(0); CREATE TABLE t3 ( f11 int) ; INSERT IGNORE INTO t3 VALUES (0); SELECT alias1.f11 AS field2 FROM ( t3 AS alias2 JOIN t1 AS alias3 ON alias3.f10 = 1) LEFT JOIN ( t2 AS alias1 ) ON alias3.f11 = 1 WHERE alias2.f11 IN ( SELECT f11 FROM t2 ) GROUP BY field2 ; field2 drop table t1, t2, t3; # # BUG#778406 Crash in hp_movelink with Aria engine and subqueries # CREATE TABLE t4 (f10 varchar(32) , KEY (f10)) ENGINE=Aria; INSERT INTO t4 VALUES ('x'),('m'),('c'); CREATE TABLE t1 (f11 int) ENGINE=Aria; INSERT INTO t1 VALUES (0),(0),(0); CREATE TABLE t2 ( f10 int) ENGINE=Aria; INSERT INTO t2 VALUES (0),(0),(0); CREATE TABLE t3 ( f10 int, f11 int) ENGINE=Aria; SELECT * FROM t4 WHERE f10 IN ( SELECT t1.f11 FROM t1 LEFT JOIN t2 JOIN t3 ON t3.f10 = t2.f10 ON t3.f11 != 0 ); f10 x m c drop table t1,t2,t3,t4; # # BUG#751484: Valgrind warning / sporadic crash in evaluate_join_record sql_select.cc:14099 with semijoin # CREATE TABLE t1 ( f10 int, f11 int, KEY (f10)); INSERT IGNORE INTO t1 VALUES (0, 0),(0, 0); CREATE TABLE t3 ( f10 int); INSERT IGNORE INTO t3 VALUES (0); set @tmp_751484= @@optimizer_switch; set optimizer_switch='materialization=on'; SELECT * FROM t1 WHERE f11 IN ( SELECT C_SQ1_alias1.f11 FROM t1 AS C_SQ1_alias1 JOIN t3 AS C_SQ1_alias2 ON C_SQ1_alias2.f10 = C_SQ1_alias1.f10 ); f10 f11 0 0 0 0 set optimizer_switch='materialization=off'; SELECT * FROM t1 WHERE f11 IN ( SELECT C_SQ1_alias1.f11 FROM t1 AS C_SQ1_alias1 JOIN t3 AS C_SQ1_alias2 ON C_SQ1_alias2.f10 = C_SQ1_alias1.f10 ); f10 f11 0 0 0 0 set optimizer_switch=@tmp_751484; drop table t1, t3; # BUG#795530 Wrong result with subquery semijoin materialization and outer join # Simplified testcase that uses DuplicateElimination # create table t1 (a int); create table t2 (a int, b char(10)); insert into t1 values (1),(2); insert into t2 values (1, 'one'), (3, 'three'); create table t3 (b char(10)); insert into t3 values('three'),( 'four'); insert into t3 values('three'),( 'four'); insert into t3 values('three'),( 'four'); insert into t3 values('three'),( 'four'); explain select * from t3 where t3.b in (select t2.b from t1 left join t2 on t1.a=t2.a); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Start temporary 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; Using join buffer (flat, BNL join) 1 PRIMARY t3 ALL NULL NULL NULL NULL 8 Using where; End temporary; Using join buffer (incremental, BNL join) select * from t3 where t3.b in (select t2.b from t1 left join t2 on t1.a=t2.a); b drop table t1, t2, t3; # # BUG#600958 RQG: Crash in optimize_semijoin_nests # CREATE TABLE t1 ( pk int(11) NOT NULL AUTO_INCREMENT, col_int_key int(11) DEFAULT NULL, col_date_key date DEFAULT NULL, col_varchar_key varchar(1) DEFAULT NULL, PRIMARY KEY (pk), KEY col_int_key (col_int_key), KEY col_date_key (col_date_key), KEY col_varchar_key (col_varchar_key,col_int_key) ) ENGINE=MyISAM AUTO_INCREMENT=11 DEFAULT CHARSET=latin1; INSERT INTO t1 VALUES (10,8,'2002-02-21',NULL); CREATE TABLE t2 ( pk int(11) NOT NULL AUTO_INCREMENT, col_int_key int(11) DEFAULT NULL, col_date_key date DEFAULT NULL, col_varchar_key varchar(1) DEFAULT NULL, PRIMARY KEY (pk), KEY col_int_key (col_int_key), KEY col_date_key (col_date_key), KEY col_varchar_key (col_varchar_key,col_int_key) ) ENGINE=MyISAM AUTO_INCREMENT=2 DEFAULT CHARSET=latin1; INSERT INTO t2 VALUES (1,7,'1900-01-01','f'); SELECT col_date_key FROM t1 WHERE 5 IN ( SELECT SUBQUERY3_t1 .col_int_key FROM t2 SUBQUERY3_t1 LEFT JOIN t1 SUBQUERY3_t2 ON SUBQUERY3_t1 .col_varchar_key ); col_date_key drop table t2, t1; # # No BUG#: Duplicate weedout check is not done for outer joins # create table t1 (a int); create table t2 (a int); insert into t1 values (1),(1),(2),(2); insert into t2 values (1); create table t0 (a int); insert into t0 values (1),(2); set @tmp_20110622= @@optimizer_switch; set optimizer_switch='firstmatch=off,loosescan=off,materialization=off'; # Check DuplicateWeedout + join buffer explain select * from t0 where a in (select t1.a from t1 left join t2 on t1.a=t2.a); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 ALL NULL NULL NULL NULL 2 Start temporary 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join) 1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where; End temporary; Using join buffer (incremental, BNL join) select * from t0 where a in (select t1.a from t1 left join t2 on t1.a=t2.a); a 1 2 # Check DuplicateWeedout without join buffer set @tmp_jcl_20110622= @@join_cache_level; set join_cache_level= 0; explain select * from t0 where a in (select t1.a from t1 left join t2 on t1.a=t2.a); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 ALL NULL NULL NULL NULL 2 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Start temporary 1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where; End temporary select * from t0 where a in (select t1.a from t1 left join t2 on t1.a=t2.a); a 1 2 # Check FirstMatch without join buffer: set optimizer_switch='firstmatch=on'; explain select * from t0 where a in (select t1.a from t1 left join t2 on t1.a=t2.a); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 ALL NULL NULL NULL NULL 2 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where 1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where; FirstMatch(t0) select * from t0 where a in (select t1.a from t1 left join t2 on t1.a=t2.a); a 1 2 # # Now, check the same for multiple inner tables: alter table t2 add b int; update t2 set b=a; create table t3 as select * from t2; set optimizer_switch='firstmatch=off'; set join_cache_level= 0; # DuplicateWeedout without join buffer explain select * from t0 where a in (select t1.a from t1 left join (t3 join t2 on t3.b=t2.b) on t1.a=t3.a); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 ALL NULL NULL NULL NULL 2 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Start temporary 1 PRIMARY t3 ALL NULL NULL NULL NULL 1 Using where 1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where; End temporary select * from t0 where a in (select t1.a from t1 left join (t3 join t2 on t3.b=t2.b) on t1.a=t3.a); a 1 2 set @@join_cache_level=@tmp_jcl_20110622; # DuplicateWeedout + join buffer explain select * from t0 where a in (select t1.a from t1 left join (t3 join t2 on t3.b=t2.b) on t1.a=t3.a); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 ALL NULL NULL NULL NULL 2 Start temporary 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join) 1 PRIMARY t3 ALL NULL NULL NULL NULL 1 Using where; Using join buffer (incremental, BNL join) 1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where; End temporary; Using join buffer (incremental, BNL join) select * from t0 where a in (select t1.a from t1 left join (t3 join t2 on t3.b=t2.b) on t1.a=t3.a); a 1 2 # Now, let the inner join side have a 'partial' match select * from t3; a b 1 1 insert into t3 values(2,2); explain select * from t0 where a in (select t1.a from t1 left join (t3 join t2 on t3.b=t2.b) on t1.a=t3.a); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 ALL NULL NULL NULL NULL 2 Start temporary 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Using join buffer (flat, BNL join) 1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using join buffer (incremental, BNL join) 1 PRIMARY t3 ALL NULL NULL NULL NULL 2 Using where; End temporary; Using join buffer (incremental, BNL join) select * from t0 where a in (select t1.a from t1 left join (t3 join t2 on t3.b=t2.b) on t1.a=t3.a); a 1 2 set @@optimizer_switch=@tmp_20110622; drop table t0, t1, t2, t3; # # BUG#802965: Crash in do_copy_not_null with semijoin=on in maria-5.3 # set @save_802965= @@optimizer_switch; set optimizer_switch='semijoin=on,materialization=off,firstmatch=off,loosescan=off'; CREATE TABLE t2 ( f1 int NOT NULL , PRIMARY KEY (f1)) ; INSERT IGNORE INTO t2 VALUES (19),(20); CREATE TABLE t1 ( f1 int NOT NULL , PRIMARY KEY (f1)) ; INSERT IGNORE INTO t1 VALUES (21),(22),(23),(24); SELECT * FROM t2 , t1 WHERE t2.f1 IN ( SELECT SQ1_alias1.f1 FROM t1 AS SQ1_alias1 LEFT JOIN t2 AS SQ1_alias2 JOIN t2 AS SQ1_alias3 ON SQ1_alias3.f1 ON SQ1_alias3.f1 ) AND t1.f1 = t2.f1 ; f1 f1 DROP TABLE t1, t2; set optimizer_switch=@save_802965; # # BUG#803365: Crash in pull_out_semijoin_tables with outer join + semijoin + derived tables in maria-5.3 with WL#106 # CREATE TABLE t1 ( f1 int) ; INSERT INTO t1 VALUES (1),(1); CREATE TABLE t2 ( f2 int) ; INSERT INTO t2 VALUES (1),(1); CREATE TABLE t3 ( f3 int) ; INSERT INTO t3 VALUES (1),(1); SELECT * FROM t1 WHERE t1.f1 IN ( SELECT t2.f2 FROM t2 LEFT JOIN ( SELECT * FROM t3 ) AS alias1 ON alias1.f3 = t2.f2 ); f1 1 1 DROP TABLE t1,t2,t3; # # BUG#611704: Crash in replace_where_subcondition with nested subquery and semijoin=on # CREATE TABLE t1 ( f1 int) ; CREATE TABLE t2 ( f1 int) ; CREATE TABLE t3 ( f1 int) ; SELECT * FROM ( SELECT t3.* FROM t2 STRAIGHT_JOIN t3 ON t3.f1 AND (t3.f1 ) IN ( SELECT t1.f1 FROM t1 ) ) AS alias1; f1 DROP TABLE t1,t2,t3; # BUG#611704: another testcase: CREATE TABLE t1 ( f1 int(11), f3 varchar(1), f4 varchar(1)) ; CREATE TABLE t2 ( f2 int(11), KEY (f2)); CREATE TABLE t3 ( f4 varchar(1)) ; PREPARE st1 FROM ' SELECT * FROM t1 STRAIGHT_JOIN ( t2 STRAIGHT_JOIN t3 ON t2.f2 ) ON (t1.f3) IN ( SELECT f4 FROM t1 ) '; EXECUTE st1; f1 f3 f4 f2 f4 DROP TABLE t1,t2,t3; set optimizer_switch=@subselect_sj_tmp; # # BUG#49129: Wrong result with IN-subquery with join_cache_level=6 and firstmatch=off # 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; set @save_optimizer_switch=@@optimizer_switch; set optimizer_switch='firstmatch=off'; The following should use a join order of t0,t1,t2, with DuplicateElimination: explain SELECT * FROM t0 WHERE t0.a IN (SELECT t1.a FROM t1, t2 WHERE t2.a=t0.a AND t1.b=t2.b); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t0 ALL NULL NULL NULL NULL 5 Using where; Start temporary 1 PRIMARY t1 ref a a 5 test.t0.a 1 Using join buffer (flat, BKA join); Key-ordered Rowid-ordered scan 1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 Using where; End temporary; Using join buffer (incremental, BKA join); Key-ordered Rowid-ordered scan 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 optimizer_switch=@save_optimizer_switch; drop table t0, t1, t2; # End set join_cache_level=default; show variables like 'join_cache_level'; Variable_name Value join_cache_level 1 set @@optimizer_switch=@save_optimizer_switch_jcl6;