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drop table if exists t0, t1, t2, t3, t4, t5, t10, t11, t12;drop view if exists v1, v2, v3, v4;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 optimizer_switch=ifnull(@optimizer_switch_for_subselect_sj_test,'outer_join_with_cache=off');SET optimizer_switch=ifnull(@optimizer_switch_for_subselect_sj_test,'semijoin_with_cache=off');set join_cache_level=1;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 Extra1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using indexselect * from t1 where a in (select pk from t10);a b0 01 12 2A confluent case of dependencyexplain 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 Extra1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tablesselect * from t1 where a in (select a from t10 where pk=12);a bexplain 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 Extra1 PRIMARY t10 const PRIMARY PRIMARY 4 const 1 1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using whereselect * from t1 where a in (select a from t10 where pk=9);a bAn empty table insideexplain select * from t1 where a in (select a from t11);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tablesselect * from t1 where a in (select a from t11);a bexplain 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 Extra1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using index1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.b 1 Using indexselect * from t1 where a in (select pk from t10) and b in (select pk from t10);a b0 01 12 2flattening a nested subqueryexplain 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 Extra1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 Using where1 PRIMARY t12 eq_ref PRIMARY PRIMARY 4 test.t10.a 1 Using indexselect * from t1 where a in (select pk from t10 where t10.a in (select pk from t12));a b0 01 12 2flattening subquery w/ several tablesexplain 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 Extra1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where1 PRIMARY t10 eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using where1 PRIMARY t12 eq_ref PRIMARY PRIMARY 4 test.t10.a 1 100.00 Using indexWarnings: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 extendedselect * 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 ExtrA1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY A ALL NULL NULL NULL NULL 3 100.00 Using where1 PRIMARY B ALL NULL NULL NULL NULL 3 100.00 Using where2 MATERIALIZED t10 index PRIMARY PRIMARY 4 NULL 10 100.00 Using indexWarnings: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`,`test`.`B`.`A` in ( <mAteriAlize> (select `test`.`t10`.`pk` from `test`.`t10` ), <primAry_index_lookup>(`test`.`B`.`A` in <temporAry tABle> on distinct_key where ((`test`.`B`.`A` = `<suBquery2>`.`pk`))))) And (`test`.`A`.`A` = `test`.`t1`.`A`))) where 1t2 should be wrapped into OJ-nest, so we have "t1 LJ (t2 J t10)"explAin extendedselect * 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 ExtrA1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 1 PRIMARY t2 ALL NULL NULL NULL NULL 3 100.00 Using where2 MATERIALIZED t10 index PRIMARY PRIMARY 4 NULL 10 100.00 Using indexWarnings: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`,`test`.`t2`.`A` in ( <mAteriAlize> (select `test`.`t10`.`pk` from `test`.`t10` ), <primAry_index_lookup>(`test`.`t2`.`A` in <temporAry tABle> on distinct_key where ((`test`.`t2`.`A` = `<suBquery2>`.`pk`))))) And (`test`.`t2`.`A` = `test`.`t1`.`A`))) where 1we 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 s49wheres00.a in (select m00.a fromt1 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 Extra1 PRIMARY s00 ALL NULL NULL NULL NULL 3 Using where1 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 (flat, BNL join)1 PRIMARY s03 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s04 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s05 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s06 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s07 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s08 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s09 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s10 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s11 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s12 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s13 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s14 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s15 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s16 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s17 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s18 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s19 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s20 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s21 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s22 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s23 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s24 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s25 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s26 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s27 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s28 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s29 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s30 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s31 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s32 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s33 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s34 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s35 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s36 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s37 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s38 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s39 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s40 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s41 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s42 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s43 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s44 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s45 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s46 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s47 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s48 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)1 PRIMARY s49 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)2 DEPENDENT SUBQUERY m00 ALL NULL NULL NULL NULL 3 Using where2 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 (flat, BNL join)2 DEPENDENT SUBQUERY m03 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)2 DEPENDENT SUBQUERY m04 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)2 DEPENDENT SUBQUERY m05 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)2 DEPENDENT SUBQUERY m06 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)2 DEPENDENT SUBQUERY m07 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)2 DEPENDENT SUBQUERY m08 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)2 DEPENDENT SUBQUERY m09 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)2 DEPENDENT SUBQUERY m10 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)2 DEPENDENT SUBQUERY m11 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)2 DEPENDENT SUBQUERY m12 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)2 DEPENDENT SUBQUERY m13 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)2 DEPENDENT SUBQUERY m14 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)2 DEPENDENT SUBQUERY m15 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)2 DEPENDENT SUBQUERY m16 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)2 DEPENDENT SUBQUERY m17 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)2 DEPENDENT SUBQUERY m18 ALL NULL NULL NULL NULL 3 Using join buffer (flat, BNL join)2 DEPENDENT SUBQUERY m19 ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)select * fromt1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t10)) where t1.a < 5;a b a b0 0 0 01 1 1 12 2 2 2prepare 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 b0 0 0 01 1 1 12 2 2 2execute s1;a b a b0 0 0 01 1 1 12 2 2 2insert 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 Extra1 PRIMARY t10 range PRIMARY PRIMARY 4 NULL 4 100.00 Using where; Using index1 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 failedassertion.
CREATE TABLE t1 (`pk` int(11),`varchar_nokey` varchar(5));INSERT INTO t1 VALUES(1,'qk'),(2,'j'),(3,'aew');SELECT *FROM t1WHERE varchar_nokey IN (SELECTvarchar_nokeyFROMt1) XOR pk = 30;pk varchar_nokey1 qk2 j3 aewdrop 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 WHEREINNR . datetime_key >= INNR . time_key OR INNR . pk = INNR . int_nokey ) AND OUTR . varchar_nokey <= 'w' HAVING X > '2012-12-12';Xdrop 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, EMPNAMEFROM STAFFWHERE EMPNUM IN(SELECT EMPNUM FROM WORKSWHERE PNUM IN(SELECT PNUM FROM PROJ));id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY STAFF ALL NULL NULL NULL NULL 5 1 PRIMARY PROJ ALL NULL NULL NULL NULL 6 1 PRIMARY WORKS ALL NULL NULL NULL NULL 12 Using where; FirstMatch(STAFF)SELECT EMPNUM, EMPNAMEFROM STAFFWHERE EMPNUM IN(SELECT EMPNUM FROM WORKSWHERE PNUM IN(SELECT PNUM FROM PROJ));EMPNUM EMPNAMEE1 AliceE2 BettyE3 CarmenE4 Donset 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_key97DROP 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(*)0SET SESSION optimizer_switch = 'semijoin=off';CALL p1();COUNT(*)0drop 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_keyDROP 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 Extra1 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 where1 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);vkeygvtunDROP 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 t2WHERE LEFT(country,1) = "A" ;SELECT city, country_idFROM t1WHERE city IN (SELECT country FROM t2WHERE LEFT(country, 1) = "A" );city country_idAlgeria 2SELECT city, country_idFROM t1WHERE city IN (SELECT country FROM v1);city country_idAlgeria 2drop 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 v1fieldFROM t1 A WHERE A.t1field IN (SELECT t1field FROM t2 );CREATE VIEW v2 AS SELECT t2field as v2fieldFROM t2 A WHERE A.t2field IN (SELECT t2field FROM t2 );CREATE PROCEDURE p1 () BEGIN SELECT v1fieldFROM 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;v1field23CALL p1;v1field23DROP 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 withnon-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 t2WHERE LEFT(country,1) = "A" ;SELECT city, country_idFROM t1WHERE country_id IN (SELECT country_id FROM t2WHERE LEFT(country,1) = "A" );city country_idBatna 2Bchar 2Skikda 2Algeria 2SELECT city, country_idFROM t1WHERE country_id IN (SELECT country_id FROM v1);city country_idBatna 2Bchar 2Skikda 2Algeria 2PREPARE stmt FROM"SELECT city, country_idFROM t1WHERE country_id IN ( SELECT country_id FROM v1);";execute stmt;city country_idBatna 2Bchar 2Skikda 2Algeria 2deallocate 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 ot1WHERE int_nokey IN (SELECT it2.int_keyFROM it1 LEFT JOIN it2 ON it2.datetime_key);int_key00000022355777899EXPLAINSELECT int_key FROM ot1WHERE int_nokey IN (SELECT it2.int_keyFROM it1 LEFT JOIN it2 ON it2.datetime_key);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 11 1 PRIMARY ot1 ALL NULL NULL NULL NULL 20 Using where; Using join buffer (flat, BNL join)2 MATERIALIZED it1 index NULL int_key 4 NULL 2 Using index2 MATERIALIZED it2 ALL int_key,datetime_key NULL NULL NULL 20 Using whereDROP 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 extendedselect a from t1where 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 Extra1 PRIMARY t2 ALL NULL NULL NULL NULL 6 100.00 Start temporary1 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 whereWarnings:Note 1276 Field or reference 'test.t1.b' of SELECT #3 was resolved in SELECT #1Note 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 MessageNote 1276 Field or reference 'test.t1.b' of SELECT #3 was resolved in SELECT #1Note 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 t1where a in (select c from t2 where d >= some(select e from t3 where b=e));a2232drop 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 Extra1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 11 func,func 1 100.00 2 MATERIALIZED t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Rowid-ordered scanWarnings:Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`pk` > 0))SELECT pk FROM t1 WHERE (a, b) IN (SELECT a, b FROM t2 WHERE pk > 0);pk2EXPLAIN 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 Extra1 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)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);pk12EXPLAIN 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 Extra1 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)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);pk2EXPLAIN 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 Extra1 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)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);pk12EXPLAIN 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 Extra1 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)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);pk12EXPLAIN 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 Extra1 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)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);pk12EXPLAIN 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 Extra1 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)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);pk12EXPLAIN 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 Extra1 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)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);pk12EXPLAIN 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 Extra1 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)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);pk12EXPLAIN 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 Extra1 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)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);pk12DROP 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 t1fieldFROM t1WHERE t1field IN (SELECT * FROM v2);";EXECUTE stmt;t1field12EXECUTE stmt;t1field12PREPARE stmt FROM"EXPLAINSELECT t1fieldFROM t1WHERE 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 Extra1 PRIMARY t1 index PRIMARY PRIMARY 4 NULL 2 Using index1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t1.t1field 1 Using index1 PRIMARY t3 eq_ref PRIMARY PRIMARY 4 test.t1.t1field 1 Using indexEXECUTE stmt;id select_type table type possible_keys key key_len ref rows Extra1 SIMPLE t1 index PRIMARY PRIMARY 4 NULL 2 Using index1 SIMPLE t2 eq_ref PRIMARY PRIMARY 4 test.t1.t1field 1 Using index1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t1.t1field 1 Using indexDROP 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_nokeyFROM 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 Extra1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 15 100.00 1 PRIMARY t2 ALL NULL NULL NULL NULL 18 100.00 Using where; Using join buffer (flat, BNL join)2 MATERIALIZED t1 ALL varchar_key NULL NULL NULL 15 100.00 Using whereWarnings:Note 1003 select `test`.`t2`.`varchar_nokey` AS `varchar_nokey` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`varchar_nokey` = `test`.`t1`.`varchar_key`) and (`test`.`t2`.`varchar_nokey` = `test`.`t1`.`varchar_key`) and ((`test`.`t1`.`varchar_key` < 'n') xor `test`.`t1`.`pk`))SELECT varchar_nokeyFROM t2 WHERE ( `varchar_nokey` , `varchar_nokey` ) IN ( SELECT `varchar_key` , `varchar_nokey` FROM t1 WHERE `varchar_nokey` < 'n' XOR `pk` ) ;varchar_nokeyDROP 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_idfrom t1where 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_idpartner2execute stmt;partner_idpartner2drop 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');EXPLAINSELECT *FROM t1WHERE t1.val IN (SELECT t2.val FROM t2WHERE t2.val LIKE 'a%' OR t2.val LIKE 'e%')AND t1.val IN (SELECT t3.val FROM t3WHERE t3.val LIKE 'a%' OR t3.val LIKE 'e%');id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t1 ALL NULL NULL NULL NULL 5 1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 13 func 1 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 13 func 1 3 MATERIALIZED t3 ALL NULL NULL NULL NULL 5 Using where2 MATERIALIZED t2 ALL NULL NULL NULL NULL 6 Using whereSELECT *FROM t1WHERE t1.val IN (SELECT t2.val FROM t2WHERE t2.val LIKE 'a%' OR t2.val LIKE 'e%')AND t1.val IN (SELECT t3.val FROM t3WHERE t3.val LIKE 'a%' OR t3.val LIKE 'e%');valaaaeeeDROP 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_keyset 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_keyDROP 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 t1WHERE (int_key, int_nokey)IN (SELECT t3.int_nokey, t3.pkFROM 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_nokeyWHERE t1.varchar_nokey IN (SELECT varchar_nokey FROM t1 WHERE (pk) IN (SELECT t3.int_nokeyFROM t3 LEFT JOIN t1 ON t1.varchar_nokeyWHERE t3.date_key BETWEEN '2008-06-07' AND '2006-06-26' ) );varchar_nokeyDROP 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 t1WHERE (int_nokey, pk) IN (SELECT t3.pk, t3.pk FROM t2 LEFT JOIN t3 ON t3.varchar_key) AND pk = 9;datetime_keyDROP TABLE t1, t2, t3;# # BUG#53060: LooseScan semijoin strategy does not return all rows# set @save_optimizer_switch=@@optimizer_switch;set optimizer_switch='semijoin=on,materialization=off';set optimizer_switch='firstmatch=off,loosescan=on';CREATE TABLE t1 (i INTEGER);INSERT INTO t1 VALUES (1), (2), (3), (4), (5);CREATE TABLE t2 (i INTEGER, j INTEGER, KEY k(i, j));INSERT INTO t2 VALUES (1, 0), (1, 1), (2, 0), (2, 1);EXPLAINSELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t2 index k k 10 NULL 4 Using where; Using index; LooseScan1 PRIMARY t1 ALL NULL NULL NULL NULL 5 Using where; Using join buffer (flat, BNL join)SELECT * FROM t1 WHERE (i) IN (SELECT i FROM t2 where j > 0);i12DROP TABLE t1, t2;set optimizer_switch=@save_optimizer_switch;## BUG#49453: re-execution of prepared statement with view # and semijoin crashes#CREATE TABLE t1 (city VARCHAR(50), country_id INT);CREATE TABLE t2 (country_id INT, country VARCHAR(50));INSERT INTO t1 VALUES ('Batna',2),('Bchar',2),('Skikda',2),('Tafuna',3),('Algeria',2) ;INSERT INTO t2 VALUES (2,'Algeria'),(2,'AlgeriaDup'),(3,'XAmerican Samoa');CREATE VIEW v1 AS SELECT country_id as vf_country_idFROM t2WHERE LEFT(country,1) = "A";PREPARE stmt FROM "SELECT city, country_idFROM t1WHERE country_id IN (SELECT vf_country_id FROM v1);";
EXECUTE stmt;city country_idBatna 2Bchar 2Skikda 2Algeria 2EXECUTE stmt;city country_idBatna 2Bchar 2Skikda 2Algeria 2DROP TABLE t1,t2;DROP VIEW v1;## Bug#54437 Extra rows with LEFT JOIN + semijoin #create table t1 (a int);create table t2 (a int);create table t3 (a int);insert into t1 values(1),(1);insert into t2 values(1),(1),(1),(1);insert into t3 values(2),(2);set @save_optimizer_switch=@@optimizer_switch;set optimizer_switch='materialization=off';set optimizer_switch='semijoin=off';explainselect * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 4 Using where2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 2 Using whereselect * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);a11set optimizer_switch='semijoin=on';explainselect * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t1 ALL NULL NULL NULL NULL 2 1 PRIMARY t2 ALL NULL NULL NULL NULL 4 Using where; Start temporary1 PRIMARY t3 ALL NULL NULL NULL NULL 2 Using where; End temporaryselect * from t1 where t1.a in (select t2.a from t2 left join t3 on t2.a=t3.a);a11set optimizer_switch=@save_optimizer_switch;drop table t1,t2,t3;## Bug#55955: crash in MEMORY engine with IN(LEFT JOIN (JOIN))#CREATE TABLE t1 (a INT);CREATE TABLE t2 (a INT);CREATE TABLE t3 (a INT);INSERT INTO t1 VALUES(1),(1);INSERT INTO t2 VALUES(1),(1);INSERT INTO t3 VALUES(2),(2);set @save_optimizer_switch=@@optimizer_switch;set optimizer_switch='semijoin=off,materialization=off';EXPLAINSELECT * FROM t1WHERE t1.a IN (SELECT t2.aFROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where2 DEPENDENT SUBQUERY t2inner ALL NULL NULL NULL NULL 2 2 DEPENDENT SUBQUERY t3 ALL NULL NULL NULL NULL 2 Using whereSELECT * FROM t1WHERE t1.a IN (SELECT t2.aFROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);a11set optimizer_switch='semijoin=off,materialization=on';EXPLAINSELECT * FROM t1WHERE t1.a IN (SELECT t2.aFROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2 2 MATERIALIZED t2inner ALL NULL NULL NULL NULL 2 2 MATERIALIZED t3 ALL NULL NULL NULL NULL 2 Using whereSELECT * FROM t1WHERE t1.a IN (SELECT t2.aFROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);a11set optimizer_switch='semijoin=on,materialization=off';EXPLAINSELECT * FROM t1WHERE t1.a IN (SELECT t2.aFROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t1 ALL NULL NULL NULL NULL 2 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where; Start temporary1 PRIMARY t2inner ALL NULL NULL NULL NULL 2 1 PRIMARY t3 ALL NULL NULL NULL NULL 2 Using where; End temporarySELECT * FROM t1WHERE t1.a IN (SELECT t2.aFROM t2 LEFT JOIN (t2 AS t2inner, t3) ON t2.a=t3.a);a11set optimizer_switch=@save_optimizer_switch;DROP TABLE t1,t2,t3;## BUG#52329 - Wrong result: subquery materialization, IN, # non-null field followed by nullable#CREATE TABLE t1 (a1 CHAR(8) NOT NULL, a2 char(8) NOT NULL);CREATE TABLE t2a (b1 char(8), b2 char(8));CREATE TABLE t2b (b1 CHAR(8), b2 char(8) NOT NULL);CREATE TABLE t2c (b1 CHAR(8) NOT NULL, b2 char(8));INSERT INTO t1 VALUES ('1 - 12', '2 - 22');INSERT INTO t2a VALUES ('1 - 11', '2 - 21'),('1 - 11', '2 - 21'),('1 - 12', '2 - 22'),('1 - 12', '2 - 22'),('1 - 13', '2 - 23');INSERT INTO t2b SELECT * FROM t2a;INSERT INTO t2c SELECT * FROM t2a;set @save_optimizer_switch=@@optimizer_switch;set optimizer_switch='semijoin=off,materialization=on';SELECT * FROM t1WHERE (a1, a2) IN (SELECT b1, b2 FROM t2c WHERE b1 > '0' GROUP BY b1, b2);a1 a21 - 12 2 - 22SELECT * FROM t1WHERE (a1, a2) IN (SELECT b1, b2 FROM t2a WHERE b1 > '0');a1 a21 - 12 2 - 22SELECT * FROM t1WHERE (a1, a2) IN (SELECT b1, b2 FROM t2b WHERE b1 > '0');a1 a21 - 12 2 - 22SELECT * FROM t1WHERE (a1, a2) IN (SELECT b1, b2 FROM t2c WHERE b1 > '0');a1 a21 - 12 2 - 22set optimizer_switch=@save_optimizer_switch;DROP TABLE t1,t2a,t2b,t2c;## Bug#57623: subquery within before insert trigger causes crash (sj=on)#CREATE TABLE ot1(a INT);CREATE TABLE ot2(a INT);CREATE TABLE ot3(a INT);CREATE TABLE it1(a INT);INSERT INTO ot1 VALUES(0),(1),(2),(3),(4),(5),(6),(7);INSERT INTO ot2 VALUES(0),(2),(4),(6);INSERT INTO ot3 VALUES(0),(3),(6);INSERT INTO it1 VALUES(0),(1),(2),(3),(4),(5),(6),(7);set @save_optimizer_switch=@@optimizer_switch;set optimizer_switch='semijoin=on';set optimizer_switch='materialization=off';explain SELECT *FROM ot1LEFT JOIN(ot2 JOIN ot3 on ot2.a=ot3.a)ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY ot1 ALL NULL NULL NULL NULL 8 1 PRIMARY ot3 ALL NULL NULL NULL NULL 3 Using where1 PRIMARY ot2 ALL NULL NULL NULL NULL 4 Using where2 DEPENDENT SUBQUERY it1 ALL NULL NULL NULL NULL 8 Using whereSELECT *FROM ot1LEFT JOIN(ot2 JOIN ot3 on ot2.a=ot3.a)ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1);a a a0 0 01 NULL NULL2 NULL NULL3 NULL NULL4 NULL NULL5 NULL NULL6 6 67 NULL NULLprepare s from 'SELECT *FROM ot1LEFT JOIN(ot2 JOIN ot3 on ot2.a=ot3.a)ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1)';execute s;a a a0 0 01 NULL NULL2 NULL NULL3 NULL NULL4 NULL NULL5 NULL NULL6 6 67 NULL NULLexecute s;a a a0 0 01 NULL NULL2 NULL NULL3 NULL NULL4 NULL NULL5 NULL NULL6 6 67 NULL NULLdeallocate prepare s;set optimizer_switch='materialization=on';explain SELECT *FROM ot1LEFT JOIN(ot2 JOIN ot3 on ot2.a=ot3.a)ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY ot1 ALL NULL NULL NULL NULL 8 1 PRIMARY ot3 ALL NULL NULL NULL NULL 3 Using where1 PRIMARY ot2 ALL NULL NULL NULL NULL 4 Using where2 MATERIALIZED it1 ALL NULL NULL NULL NULL 8 SELECT *FROM ot1LEFT JOIN(ot2 JOIN ot3 on ot2.a=ot3.a)ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1);a a a0 0 01 NULL NULL2 NULL NULL3 NULL NULL4 NULL NULL5 NULL NULL6 6 67 NULL NULLprepare s from 'SELECT *FROM ot1LEFT JOIN(ot2 JOIN ot3 on ot2.a=ot3.a)ON ot1.a=ot2.a AND ot1.a IN (SELECT a from it1)';execute s;a a a0 0 01 NULL NULL2 NULL NULL3 NULL NULL4 NULL NULL5 NULL NULL6 6 67 NULL NULLexecute s;a a a0 0 01 NULL NULL2 NULL NULL3 NULL NULL4 NULL NULL5 NULL NULL6 6 67 NULL NULLdeallocate prepare s;set optimizer_switch=@save_optimizer_switch;DROP TABLE ot1, ot2, ot3, it1;## Bug#59919/11766739: Crash in tmp_table_param::init() with semijoin=on#CREATE TABLE t1 (f1 INTEGER) ENGINE=MyISAM;CREATE TABLE t2 (f1 INTEGER, f2 INTEGER) ENGINE=MyISAM;CREATE TABLE t3 (f1 INTEGER, f2 INTEGER) ENGINE=MyISAM;INSERT INTO t1 VALUES (1);INSERT INTO t2 VALUES (1,1), (2,1);INSERT INTO t3 VALUES (1,1), (2,1), (5,4), (7,3), (8,2), (8,1), (7,3),(9,5), (4,3), (7,2), (7,7), (3,1), (5,8), (9,7);set @save_optimizer_switch=@@optimizer_switch;set optimizer_switch='semijoin=off,materialization=on';EXPLAINSELECT * FROM t3WHERE f2 IN (SELECT t1.f1FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t3 ALL NULL NULL NULL NULL 14 Using where2 MATERIALIZED t1 system NULL NULL NULL NULL 1 2 MATERIALIZED b1 ALL NULL NULL NULL NULL 2 Using where2 MATERIALIZED b2 ALL NULL NULL NULL NULL 2 SELECT * FROM t3WHERE f2 IN (SELECT t1.f1FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);f1 f21 12 18 13 1set optimizer_switch='semijoin=on,materialization=on';EXPLAINSELECT * FROM t3WHERE f2 IN (SELECT t1.f1FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t1 system NULL NULL NULL NULL 1 1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 1 1 PRIMARY t3 ALL NULL NULL NULL NULL 14 Using where; Using join buffer (flat, BNL join)2 MATERIALIZED b1 ALL NULL NULL NULL NULL 2 Using where2 MATERIALIZED b2 ALL NULL NULL NULL NULL 2 SELECT * FROM t3WHERE f2 IN (SELECT t1.f1FROM t1 LEFT OUTER JOIN (t2 AS b1 JOIN t2 AS b2 ON TRUE) ON TRUE);f1 f21 12 18 13 1set optimizer_switch=@save_optimizer_switch;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 Extra1 PRIMARY A index PRIMARY PRIMARY 4 NULL 3 Using index1 PRIMARY B index NULL PRIMARY 4 NULL 3 Using index; Start temporary; End temporary1 PRIMARY C eq_ref PRIMARY PRIMARY 4 test.A.t1field 1 Using index1 PRIMARY D eq_ref PRIMARY PRIMARY 4 test.A.t1field 1 Using indexSELECT * 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));t1field23drop 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 Bwhere A.a = B.a and A.a in (select a from t2 C) and B.a in (select a from t2 D);a a1 12 23 3explainselect * from t1 A, t1 Bwhere 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 Extra1 PRIMARY A ALL NULL NULL NULL NULL 3 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 1 PRIMARY B ALL NULL NULL NULL NULL 3 Using where; Using join buffer (flat, BNL join)1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 4 func 1 2 MATERIALIZED C ALL NULL NULL NULL NULL 3 3 MATERIALIZED D ALL NULL NULL NULL NULL 3 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;EXPLAINSELECT * 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 Extra1 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 MATERIALIZED <derived3> system NULL NULL NULL NULL 1 3 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables usedSELECT * FROM t1 INNER JOIN t2 ON t2.a != 0 AND t2.a IN (SELECT * FROM v1);a a1 11 11 11 1DROP 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 field2FROM ( t3 AS alias2 JOIN t1 AS alias3 ON alias3.f10 = 1)LEFT JOIN ( t2 AS alias1 ) ON alias3.f11 = 1WHERE alias2.f11 IN ( SELECT f11 FROM t2 )GROUP BY field2 ;field2drop 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 t4WHERE f10 IN( SELECT t1.f11FROM t1LEFT JOIN t2 JOIN t3 ON t3.f10 = t2.f10 ON t3.f11 != 0 );f10xmcdrop 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 t1WHERE f11 IN (SELECT C_SQ1_alias1.f11FROM t1 AS C_SQ1_alias1JOIN t3 AS C_SQ1_alias2ON C_SQ1_alias2.f10 = C_SQ1_alias1.f10);f10 f110 00 0set optimizer_switch='materialization=off';SELECT * FROM t1WHERE f11 IN (SELECT C_SQ1_alias1.f11FROM t1 AS C_SQ1_alias1JOIN t3 AS C_SQ1_alias2ON C_SQ1_alias2.f10 = C_SQ1_alias1.f10);f10 f110 00 0set 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 Extra1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2 1 PRIMARY t3 ALL NULL NULL NULL NULL 8 Using where; Using join buffer (flat, BNL join)2 MATERIALIZED t1 ALL NULL NULL NULL NULL 2 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 2 Using whereselect * from t3 where t3.b in (select t2.b from t1 left join t2 on t1.a=t2.a);bdrop 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 t1WHERE 5 IN (SELECT SUBQUERY3_t1 .col_int_keyFROM t2 SUBQUERY3_t1LEFT JOIN t1 SUBQUERY3_t2 ON SUBQUERY3_t1 .col_varchar_key);col_date_keydrop 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 bufferexplain 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 Extra1 PRIMARY t0 ALL NULL NULL NULL NULL 2 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Start temporary1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where; End temporaryselect * from t0 where a in (select t1.a from t1 left join t2 on t1.a=t2.a);a12# Check DuplicateWeedout without join bufferset @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 Extra1 PRIMARY t0 ALL NULL NULL NULL NULL 2 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Start temporary1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where; End temporaryselect * from t0 where a in (select t1.a from t1 left join t2 on t1.a=t2.a);a12# 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 Extra1 PRIMARY t0 ALL NULL NULL NULL NULL 2 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Start temporary1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where; End temporaryselect * from t0 where a in (select t1.a from t1 left join t2 on t1.a=t2.a);a12## 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 bufferexplain 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 Extra1 PRIMARY t0 ALL NULL NULL NULL NULL 2 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Start temporary1 PRIMARY t3 ALL NULL NULL NULL NULL 1 Using where1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where; End temporaryselect * 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);a12set @@join_cache_level=@tmp_jcl_20110622;# DuplicateWeedout + join bufferexplainselect * 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 Extra1 PRIMARY t0 ALL NULL NULL NULL NULL 2 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Start temporary1 PRIMARY t3 ALL NULL NULL NULL NULL 1 Using where1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where; End temporaryselect * 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);a12# Now, let the inner join side have a 'partial' matchselect * from t3;a b1 1insert into t3 values(2,2);explainselect * 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 Extra1 PRIMARY t0 ALL NULL NULL NULL NULL 2 1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; Start temporary1 PRIMARY t2 ALL NULL NULL NULL NULL 1 1 PRIMARY t3 ALL NULL NULL NULL NULL 2 Using where; End temporaryselect * 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);a12set @@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 , t1WHERE t2.f1 IN(SELECT SQ1_alias1.f1FROM 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 f1DROP 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 t1WHERE t1.f1 IN (SELECT t2.f2FROM t2LEFT JOIN (SELECT *FROM t3) AS alias1ON alias1.f3 = t2.f2);f111DROP 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 t3ON t3.f1AND (t3.f1 ) IN (SELECT t1.f1FROM t1)) AS alias1;f1DROP 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 t1STRAIGHT_JOIN ( t2 STRAIGHT_JOIN t3 ON t2.f2 )ON (t1.f3) IN ( SELECT f4 FROM t1 )';EXECUTE st1;f1 f3 f4 f2 f4DROP TABLE t1,t2,t3;## BUG#803457: Wrong result with semijoin + view + outer join in maria-5.3-subqueries-mwl90# (Original testcase)#CREATE TABLE t1 (f1 int, f2 int );INSERT INTO t1 VALUES (2,0),(4,0),(0,NULL);CREATE TABLE t2 (f2 int, f3 int );INSERT INTO t2 VALUES (NULL,NULL),(0,0);CREATE TABLE t3 ( f1 int, f3 int );INSERT INTO t3 VALUES (2,0),(4,0),(0,NULL),(4,0),(8,0);CREATE TABLE t4 ( f2 int, KEY (f2) );INSERT INTO t4 VALUES (0),(NULL);CREATE VIEW v4 AS SELECT DISTINCT f2 FROM t4 ;# The following must not have outer joins:explain extendedSELECT * FROM t1 NATURAL LEFT JOIN (t2, t3) WHERE t2.f3 IN (SELECT * FROM t4);id select_type table type possible_keys key key_len ref rows filtered Extra1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00 Using where1 PRIMARY t4 ref f2 f2 5 test.t2.f3 2 100.00 Using index; FirstMatch(t2)1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where; Using join buffer (flat, BNL join)1 PRIMARY t3 ALL NULL NULL NULL NULL 5 100.00 Using where; Using join buffer (flat, BNL join)Warnings:Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f2` AS `f2`,`test`.`t2`.`f3` AS `f3`,`test`.`t3`.`f3` AS `f3` from `test`.`t1` semi join (`test`.`t4`) join `test`.`t2` join `test`.`t3` where ((`test`.`t1`.`f2` = `test`.`t2`.`f2`) and (`test`.`t3`.`f1` = `test`.`t1`.`f1`) and (`test`.`t4`.`f2` = `test`.`t2`.`f3`))SELECT * FROM t1 NATURAL LEFT JOIN (t2, t3) WHERE t2.f3 IN (SELECT * FROM t4);f1 f2 f3 f32 0 0 04 0 0 04 0 0 0drop view v4;drop table t1, t2, t3, t4;## BUG#803303: Wrong result with semijoin=on, outer join in maria-5.3-subqueries-mwl90## Testcase#1:set @tmp803303= @@optimizer_switch;set optimizer_switch = 'semijoin=on,materialization=off,firstmatch=off,loosescan=off';CREATE TABLE t2 ( f1 int) ;INSERT IGNORE INTO t2 VALUES (6),(8);CREATE TABLE t1 ( f1 int, f2 int, f3 int) ;INSERT IGNORE INTO t1 VALUES (8,0,0),(7,0,0),(9,0,0);SELECT alias2.f1FROM t2 AS alias1LEFT JOIN ( t1 AS alias2 JOIN t1 AS alias3 ON alias3.f2 = alias2.f3 )ON alias3.f2 = alias2.f2WHERE alias2.f1 IN ( SELECT f1 FROM t2 AS alias4 ) ;f1888888drop table t1,t2;set optimizer_switch= @tmp803303;# Testcase #2:CREATE TABLE t1 ( f10 int) ;INSERT INTO t1 VALUES (0),(0);CREATE TABLE t2 ( f10 int, f11 varchar(1)) ;INSERT INTO t2 VALUES (0,'a'),(0,'b');CREATE TABLE t3 ( f10 int) ;INSERT INTO t3 VALUES (0),(0),(0),(0),(0);CREATE TABLE t4 ( f10 varchar(1), f11 int) ;INSERT INTO t4 VALUES ('a',0),('b',0);SELECT * FROM t1LEFT JOIN ( t2 JOIN t3 ON t3.f10 = t2.f10 ) ON t1.f10 = t2.f10WHERE t2.f10 IN (SELECT t4.f11FROM t4WHERE t4.f10 != t2.f11);f10 f10 f11 f100 0 a 00 0 a 00 0 b 00 0 b 00 0 a 00 0 a 00 0 b 00 0 b 00 0 a 00 0 a 00 0 b 00 0 b 00 0 a 00 0 a 00 0 b 00 0 b 00 0 a 00 0 a 00 0 b 00 0 b 0drop table t1,t2,t3,t4;## BUG#803457: Wrong result with semijoin + view + outer join in maria-5.3-subqueries-mwl90#set @tmp803457=@@optimizer_switch;set optimizer_switch='materialization=off';CREATE TABLE t1 (f1 int, f2 int );INSERT INTO t1 VALUES (2,0),(4,0),(0,NULL);CREATE TABLE t2 (f2 int, f3 int );INSERT INTO t2 VALUES (NULL,NULL),(0,0);CREATE TABLE t3 ( f1 int, f3 int );INSERT INTO t3 VALUES (2,0),(4,0),(0,NULL),(4,0),(8,0);CREATE TABLE t4 ( f2 int);INSERT INTO t4 VALUES (0),(NULL);# The following uses Duplicate Weedout, and "End temporary" must not be# in the middle of the inner side of an outer join:explain SELECT * FROM t1 NATURAL LEFT JOIN (t2, t3) WHERE IFNULL(t2.f3,'foo') IN (SELECT * FROM t4);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t1 ALL NULL NULL NULL NULL 3 1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where1 PRIMARY t3 ALL NULL NULL NULL NULL 5 Using where1 PRIMARY t4 ALL NULL NULL NULL NULL 2 Using where; Start temporary; End temporarySELECT * FROM t1 NATURAL LEFT JOIN (t2, t3 ) WHERE IFNULL(t2.f3,'foo') IN (SELECT * FROM t4);f1 f2 f3 f32 0 0 04 0 0 04 0 0 00 NULL NULL NULLDROP TABLE t1, t2, t3, t4;set @tmp803457=@@optimizer_switch;## BUG#818280: crash in do_copy_not_null() in maria-5.3 with semijoin#CREATE TABLE t1 ( c1 int NOT NULL , c2 int NOT NULL, PRIMARY KEY (c1)) ;INSERT IGNORE INTO t1 VALUES (2,7),(1,3),(5,6);CREATE TABLE t3 ( c1 int NOT NULL , c2 int NOT NULL, PRIMARY KEY (c1)) ;INSERT IGNORE INTO t3 VALUES (2,7),(1,3),(5,6);CREATE TABLE t2 ( c1 int NOT NULL , c5 int NOT NULL );INSERT IGNORE INTO t2 VALUES (2,2),(2,2),(5,6);SELECT * FROM t1 WHERE c1 IN ( SELECT t3.c1 FROM t3 LEFT JOIN t2 ON t2 .c1 = t3 .c1 WHERE t2.c5 != 0 );c1 c22 75 6DROP TABLE t1, t2, t3;## BUG#834534: Assertion `0' failed in replace_where_subcondition with semijoin subquery in HAVING#CREATE TABLE t1 ( d int );INSERT INTO t1 VALUES (2),(2),(0),(2),(2);CREATE TABLE t2 ( b int );INSERT INTO t2 VALUES (4),(3),(3);CREATE TABLE t3 ( a int );SELECT *FROM t3WHERE (t3.a) IN (SELECT t1.dFROM t1HAVING ( 4 ) IN (SELECT t2.bFROM t2));adrop table t1, t2,t3;## BUG#834758: Wrong result with innner join, LooseScan, two-column IN() predicate#set @tmp835758=@@optimizer_switch;set optimizer_switch='semijoin=on,loosescan=on,materialization=off,firstmatch=off';CREATE TABLE t1 (b int) ;INSERT INTO t1 VALUES (1),(5);CREATE TABLE t2 (a int, PRIMARY KEY (a)) ;INSERT INTO t2 VALUES (6),(10);CREATE TABLE t3 (a int, b int, KEY (b)) ;INSERT INTO t3 VALUES (6,5),(6,2),(8,0),(9,1),(6,5);# This used to incorrectly pick a join order of (t1, LooseScan(t3), t2):explain SELECT * FROM t1, t2 WHERE (t2.a , t1.b) IN (SELECT a, b FROM t3);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t1 ALL NULL NULL NULL NULL 2 1 PRIMARY t2 index PRIMARY PRIMARY 4 NULL 2 Using index; Using join buffer (flat, BNL join)1 PRIMARY t3 ALL b NULL NULL NULL 5 Using where; Start temporary; End temporarySELECT * FROM t1, t2 WHERE (t2.a , t1.b) IN (SELECT a, b FROM t3);b a5 6DROP TABLE t1, t2, t3;set @@optimizer_switch= @tmp835758;## BUG#834739: Wrong result with 3-way inner join, LooseScan,multipart keys #set @tmp834739=@@optimizer_switch;set optimizer_switch='semijoin=on,loosescan=on,materialization=off,firstmatch=off';CREATE TABLE t2 ( b int, c int, KEY (b)) ;INSERT INTO t2 VALUES (1,0),(1,0),(9,0),(1,0),(5,0);INSERT INTO t2 VALUES (2,0),(3,0),(8,0),(6,0),(5,0);CREATE TABLE t3 ( a int);INSERT INTO t3 VALUES (0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0);CREATE TABLE t4 ( a int);INSERT INTO t4 VALUES (0),(0),(0);CREATE TABLE t5 ( b int, a int , KEY (a,b)) ;INSERT INTO t5 VALUES (7,0),(9,0);explainSELECT * FROM t3 WHERE t3.a IN (SELECT t5.a FROM t2, t4, t5 WHERE t2.c = t5.a AND t2.b = t5.b);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t5 index a a 10 NULL 2 Using where; Using index; LooseScan1 PRIMARY t4 ALL NULL NULL NULL NULL 3 1 PRIMARY t2 ref b b 5 test.t5.b 2 Using where; FirstMatch(t5)1 PRIMARY t3 ALL NULL NULL NULL NULL 15 Using where; Using join buffer (flat, BNL join)SELECT * FROM t3 WHERE t3.a IN (SELECT t5.a FROM t2, t4, t5 WHERE t2.c = t5.a AND t2.b = t5.b);a000000000000000DROP TABLE t2, t3, t4, t5;set @@optimizer_switch=@tmp834739;## BUG#830993: Crash in end_read_record with derived table#set @tmp_830993=@@optimizer_switch;set optimizer_switch='semijoin=on,loosescan=off,materialization=off,firstmatch=off';set @tmp_830993_jbs= @@join_buffer_size;set join_buffer_size=160;CREATE TABLE t1 (a int(11) NOT NULL AUTO_INCREMENT, b int(11) DEFAULT NULL, c int(11) DEFAULT NULL, d time DEFAULT NULL, e varchar(1) DEFAULT NULL, f varchar(1) DEFAULT NULL, PRIMARY KEY (a), KEY c (c), KEY d (d), KEY e (e,c));INSERT INTO t1 VALUES (10,NULL,8,'22:55:23','x','x'),(11,8,7,'10:19:31','d','d'),(12,1,1,'14:40:36','r','r'),(13,9,7,'04:37:47','f','f'),(14,4,9,'19:34:06','y','y'),(15,3,NULL,'20:35:33','u','u'),(16,2,1,NULL,'m','m'),(17,NULL,9,'14:43:37',NULL,NULL),(18,2,2,'02:23:09','o','o'),(19,NULL,9,'01:22:45','w','w'),(20,6,2,'00:00:00','m','m'),(21,7,4,'00:13:25','q','q'),(22,2,0,'03:47:16',NULL,NULL),(23,5,4,'01:41:48','d','d'),(24,7,8,'00:00:00','g','g'),(25,6,NULL,'22:32:04','x','x'),(26,6,NULL,'16:44:14','f','f'),(27,2,0,'17:38:37','p','p'),(28,9,NULL,'08:46:48','j','j'),(29,6,8,'14:11:27','c','c');CREATE TABLE t2 like t1;INSERT INTO t2 VALUES (1,2,4,'22:34:09','v','v'),(2,150,62,'14:26:02','v','v'),(3,NULL,7,'14:03:03','c','c'),(4,2,1,'01:46:09',NULL,NULL),(5,5,0,'16:21:18','x','x'),(6,3,7,'18:56:33','i','i'),(7,1,7,NULL,'e','e'),(8,4,1,'09:29:08','p','p'),(9,NULL,7,'19:11:10','s','s'),(10,2,1,'11:57:26','j','j'),(11,6,5,'00:39:46','z','z'),(12,6,2,'03:28:15','c','c'),(13,8,0,'06:44:18','a','a'),(14,2,1,'14:36:39','q','q'),(15,6,8,'18:42:45','y','y'),(16,8,1,'02:57:29',NULL,NULL),(17,3,1,'16:46:13','r','r'),(18,3,9,'19:39:02','v','v'),(19,9,1,NULL,NULL,NULL),(20,6,5,'20:58:33','r','r');set @tmp_optimizer_switch=@@optimizer_switch;set optimizer_switch='derived_merge=off,derived_with_keys=off';explainSELECTalias1.a, alias1.b, alias1.c, alias1.d, alias1.e, alias1.f,alias2.a as a2_a, alias2.b as a2_b, alias2.c as a2_c, alias2.d as a2_d, alias2.e as a2_e, alias2.f as a2_f,t2.a as t2_a, t2.b as t2_b, t2.c as t2_c, t2.d as t2_d, t2.e as t2_e, t2.f as t2_fFROM (SELECT * FROM t2) AS alias1,t1 AS alias2, t2WHERE alias1.c IN (SELECT SQ3_alias1.b FROM t2 AS SQ3_alias1 STRAIGHT_JOIN t2 AS SQ3_alias2)LIMIT 100;id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY <derived2> ALL NULL NULL NULL NULL 20 1 PRIMARY alias2 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join)1 PRIMARY t2 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join)1 PRIMARY SQ3_alias1 ALL NULL NULL NULL NULL 20 Using where; Start temporary1 PRIMARY SQ3_alias2 index NULL PRIMARY 4 NULL 20 Using index; End temporary2 DERIVED t2 ALL NULL NULL NULL NULL 20 create table t3 asSELECT alias1.a, alias1.b, alias1.c, alias1.d, alias1.e, alias1.f,alias2.a as a2_a, alias2.b as a2_b, alias2.c as a2_c, alias2.d as a2_d, alias2.e as a2_e, alias2.f as a2_f,t2.a as t2_a, t2.b as t2_b, t2.c as t2_c, t2.d as t2_d, t2.e as t2_e, t2.f as t2_fFROM (SELECT * FROM t2) AS alias1,t1 AS alias2, t2WHERE alias1.c IN (SELECT SQ3_alias1.b FROM t2 AS SQ3_alias1 STRAIGHT_JOIN t2 AS SQ3_alias2)LIMIT 100;set optimizer_switch=@tmp_optimizer_switch;drop table t1,t2, t3;set optimizer_switch=@tmp_830993;set join_buffer_size= @tmp_830993_jbs;## BUG##849717: Crash in Item_func::fix_fields on second execution of a prepared statement with semijoin#CREATE TABLE t1 (a int);CREATE TABLE t2 (a int);CREATE TABLE t3 (a int, b int) ;PREPARE st1 FROM "SELECT * FROM t2 LEFT JOIN t1 ON t2.a != 0 AND ('j','r') IN ( SELECT b,a FROM t3)";EXECUTE st1;a aEXECUTE st1;a aDROP TABLE t1, t2, t3;## BUG#849776: Wrong result with semijoin + "Impossible where"#CREATE TABLE t1 ( b varchar(1), a integer) ;INSERT INTO t1 VALUES ('z',8);CREATE TABLE t2 ( a integer, b varchar(1)) ;CREATE TABLE t4 ( a integer, b varchar(1)) ;CREATE TABLE t5 ( a integer) ;INSERT INTO t5 VALUES (8);select * from t5 where (a) in (SELECT t1.a FROM t1 LEFT JOIN t2 ON t1.a = t2.aWHERE t2.b NOT IN (SELECT t4.b FROM t4 WHERE t4.b < t1.b));a8DROP TABLE t1, t2, t4, t5;## BUG#861147: Assertion `fixed == 1' failed in Item_func_eq::val_int() with semijoin + materialization + max_join_size#create table t1 (a int);insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);set @tmp_mjs_861147= @@max_join_size;SET max_join_size=10;set @tmp_os_861147= @@optimizer_switch;set @@optimizer_switch='semijoin=on,materialization=on';explainselect * from t1 where a in (select max(A.a + B.a + C.a) from t1 A, t1 B, t1 C);ERROR 42000: The SELECT would examine more than MAX_JOIN_SIZE rows; check your WHERE and use SET SQL_BIG_SELECTS=1 or SET MAX_JOIN_SIZE=# if the SELECT is okayset max_join_size= @tmp_mjs_861147;set optimizer_switch= @tmp_os_861147;drop table t1;## BUG#877288: Wrong result with semijoin + materialization + multipart key#set @tmp_877288=@@optimizer_switch;set optimizer_switch='semijoin=ON,materialization=ON';CREATE TABLE t1 ( a int) ;INSERT INTO t1 VALUES (19),(19),(19),(20),(20),(20),(20),(20),(20);CREATE TABLE t2 ( b int NOT NULL , c int NOT NULL , KEY (b,c)) ;INSERT INTO t2 VALUES (14,1),(15,1),(16,1),(17,1),(18,1),(19,1),(20,1);CREATE TABLE t3 ( a int, d int) ;INSERT INTO t3 VALUES (19,1),(7,1),(3,1),(3,1),(20,1),(3,1),(16,1),(17,1),(9,1),(4,1),(6,1),(15,1),(17,1);explainSELECT * FROM t1 WHERE (a) IN (SELECT a FROM t2 JOIN t3 ON b = a);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t1 ALL NULL NULL NULL NULL 9 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 2 MATERIALIZED t3 ALL NULL NULL NULL NULL 13 Using where2 MATERIALIZED t2 ref b b 4 test.t3.a 1 Using indexSELECT * FROM t1 WHERE (a) IN (SELECT a FROM t2 JOIN t3 ON b = a);a191919202020202020DROP TABLE t1,t2,t3;set optimizer_switch=@tmp_877288;## BUG#878753: Assertion '0' failed in replace_where_subcondition with derived_merge#set @tmp878753= @@optimizer_switch;set optimizer_switch= 'semijoin=on,derived_merge=on';CREATE TABLE t1 (b int(11)) ;CREATE TABLE t2 (c int, b int, d varchar(52) NOT NULL) ;CREATE TABLE t3 (b int(11)) ;PREPARE st1 FROM ' SELECT * FROM t1 JOIN ( SELECT t2.* FROM t2 WHERE t2.d <> "a" AND t2.c IN ( SELECT t3.b FROM t3 ) ) AS alias2 ON ( alias2.b = t1.b );';EXECUTE st1;b c b dDROP TABLE t1,t2,t3;set optimizer_switch=@tmp878753;## Bug #889750: semijoin=on + firstmatch=off + semijoin_with_cache=off#create table t1 (a int);insert into t1 values (7), (1), (5), (3);create table t2 (a int);insert into t2 values (4), (1), (8), (3), (9), (2);set @tmp_otimizer_switch= @@optimizer_switch;set optimizer_switch='semijoin=on';set optimizer_switch='firstmatch=off';set optimizer_switch='semijoin_with_cache=on';explainselect * from t1 where t1.a in (select t2.a from t2);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t1 ALL NULL NULL NULL NULL 4 1 PRIMARY t2 ALL NULL NULL NULL NULL 6 Using where; Start temporary; End temporary; Using join buffer (flat, BNL join)select * from t1 where t1.a in (select t2.a from t2);a13set optimizer_switch='semijoin_with_cache=off';explainselect * from t1 where t1.a in (select t2.a from t2);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t1 ALL NULL NULL NULL NULL 4 1 PRIMARY t2 ALL NULL NULL NULL NULL 6 Using where; Start temporary; End temporaryselect * from t1 where t1.a in (select t2.a from t2);a13set optimizer_switch= @tmp_otimizer_switch;drop table t1,t2;## Bug #887496: semijoin with IN equality for the second part of an index#CREATE TABLE t1 (a int);INSERT INTO t1 VALUES (9), (0), (8), (5);CREATE TABLE t2 (a int, b varchar(1), INDEX idx (b,a));INSERT INTO t2 VALUES (5,'r'), (5,'z');CREATE TABLE t3 (a int, b varchar(1), INDEX idx (b,a));INSERT INTO t3 VALUES (5,'r'), (5,'z');set @tmp_otimizer_switch= @@optimizer_switch;SET SESSION optimizer_switch='semijoin=on,firstmatch=on';SET SESSION optimizer_switch='loosescan=off';EXPLAINSELECT * FROM t1 WHERE a IN (SELECT t2.a FROM t2,t3 WHERE t2.b = t3.b);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t2 index idx idx 9 NULL 2 Using where; Using index; Start temporary1 PRIMARY t3 ref idx idx 4 test.t2.b 1 Using index1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; End temporary; Using join buffer (flat, BNL join)SELECT * FROM t1 WHERE a IN (SELECT t2.a FROM t2,t3 WHERE t2.b = t3.b);a5SET SESSION optimizer_switch='loosescan=on';EXPLAINSELECT * FROM t1 WHERE a IN (SELECT t2.a FROM t2,t3 WHERE t2.b = t3.b);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t2 index idx idx 9 NULL 2 Using where; Using index; Start temporary1 PRIMARY t3 ref idx idx 4 test.t2.b 1 Using index1 PRIMARY t1 ALL NULL NULL NULL NULL 4 Using where; End temporary; Using join buffer (flat, BNL join)SELECT * FROM t1 WHERE a IN (SELECT t2.a FROM t2,t3 WHERE t2.b = t3.b);a5set optimizer_switch= @tmp_otimizer_switch;DROP TABLE t1,t2,t3;## Bug #901312: materialized semijoin + right join#CREATE TABLE t1 (a int);INSERT INTO t1 VALUES (4), (1);CREATE TABLE t2 (b int);INSERT INTO t2 VALUES (4), (1);CREATE TABLE t3 (c int);INSERT INTO t3 VALUES (4), (1);set @tmp_otimizer_switch= @@optimizer_switch;SET SESSION optimizer_switch='semijoin=on,materialization=on';EXPLAINSELECT * FROM t1 RIGHT JOIN t2 ON b = a WHERE t2.b IN (SELECT c FROM t3);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t2 ALL NULL NULL NULL NULL 2 1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using where2 MATERIALIZED t3 ALL NULL NULL NULL NULL 2 SELECT * FROM t1 RIGHT JOIN t2 ON b = a WHERE t2.b IN (SELECT c FROM t3);a b4 41 1set optimizer_switch= @tmp_otimizer_switch;DROP TABLE t1,t2,t3;## Bug #901709: assertion failure with record count == 0 #CREATE TABLE t1 (a int, KEY (a));INSERT INTO t1 VALUES (4), (6);CREATE TABLE t2 (a int, KEY (a));INSERT INTO t2 VALUES (4), (6);CREATE TABLE t3 (b int);INSERT INTO t3 VALUES (4);CREATE TABLE t4 (c int);SET @tmp_optimizer_switch=@@optimizer_switch;SET @@optimizer_switch='semijoin=on';SET @@optimizer_switch='materialization=on';SET @@optimizer_switch='firstmatch=on';SET optimizer_switch='semijoin_with_cache=on';SET optimizer_prune_level=0;EXPLAINSELECT * FROM t1, t2WHERE t1.a = t2.a AND t2.a IN (SELECT b FROM t3 STRAIGHT_JOIN t4);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t3 system NULL NULL NULL NULL 1 1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 1 1 PRIMARY t1 ref a a 5 const 1 Using index1 PRIMARY t2 ref a a 5 test.t3.b 1 Using index2 MATERIALIZED t4 ALL NULL NULL NULL NULL 0 SELECT * FROM t1, t2WHERE t1.a = t2.a AND t2.a IN (SELECT b FROM t3 STRAIGHT_JOIN t4);a aSET optimizer_prune_level=DEFAULT;SET optimizer_switch=@tmp_optimizer_switch;DROP TABLE t1,t2,t3,t4;## BUG#901399: Wrong result (extra row) with semijoin=ON, materialization=OFF, optimizer_prune_level=0#set @opl_901399= @@optimizer_prune_level;set @os_091399= @@optimizer_switch;SET optimizer_prune_level=0;SET optimizer_switch = 'materialization=off';CREATE TABLE t1 ( c INT ) ENGINE=MyISAM;INSERT INTO t1 VALUES(0),(1),(2),(3),(4),(5),(6),(7),(8),(9),(10),(11),(12);CREATE TABLE t2 ( a INT, b INT, KEY(a)) ENGINE=MyISAM;INSERT INTO t2 VALUES (3,20),(2,21),(3,22);SELECT *FROM t1 AS alias1, t1 AS alias2WHERE ( alias1.c, alias2.c )IN (SELECT alias3.a, alias3.aFROM t2 AS alias3, t2 alias4WHERE alias3.b = alias4.b);c c2 23 3set optimizer_prune_level= @opl_901399;set optimizer_switch= @os_091399;DROP TABLE t1,t2;## BUG#912510: Crash in do_copy_not_null with semijoin=ON, firstmatch=ON, aggregate ...#CREATE TABLE t1 ( a VARCHAR(1) NOT NULL );INSERT INTO t1 VALUES ('k'),('l');CREATE TABLE t2 ( b VARCHAR(1) NOT NULL, KEY(b) );INSERT INTO t2 VALUES ('k'),('l');CREATE TABLE t3 ( c VARCHAR(1) NOT NULL, KEY(c) );INSERT INTO t3 VALUES ('m'),('n');SELECT a, COUNT(*) FROM t1WHERE a IN (SELECT b FROM t2 force index(b), t3 force index(c)WHERE c = b AND b = a);a COUNT(*)NULL 0DROP TABLE t1, t2, t3;## BUG#920255: Wrong result (extra rows) with loosescan and IN subquery#CREATE TABLE t1 ( a INT PRIMARY KEY, b INT, KEY(b) );INSERT INTO t1 VALUES(1,2),(2,1),(3,3),(4,2),(5,5),(6,3),(7,1),(8,4),(9,3),(10,2);CREATE TABLE t2 ( c INT, d INT, UNIQUE KEY(c) );INSERT INTO t2 VALUES(1,2),(2,1),(3,3),(4,2),(5,5),(6,3),(7,1);SELECT a, b, d FROM t1, t2WHERE ( b, d ) IN( SELECT b, d FROM t1, t2 WHERE b = c );a b d2 1 27 1 22 1 27 1 21 2 14 2 110 2 11 2 14 2 110 2 13 3 36 3 39 3 33 3 36 3 39 3 38 4 28 4 25 5 5DROP TABLE t1, t2;## BUG#920713: Wrong result (missing rows) with firstmatch+BNL, IN subquery, ...#CREATE TABLE t1 ( a VARCHAR(1) ) ENGINE=MyISAM;INSERT INTO t1 VALUES ('e'),('w'),('a'),('h'),('x'),('k'),('g');CREATE TABLE t2 ( b INT, c VARCHAR(1) );INSERT INTO t2 VALUES (0,'j'),(8,'v');SELECT * FROM t1 alias1, t2 alias2WHERE alias2.c IN (SELECT alias4.c FROM t1 alias3, t2 alias4);a b ce 0 je 8 vw 0 jw 8 va 0 ja 8 vh 0 jh 8 vx 0 jx 8 vk 0 jk 8 vg 0 jg 8 vDROP TABLE t1, t2;## BUG#923246: Loosescan reports different result than other semijoin methods#set @tmp_923246= @@optimizer_switch;set optimizer_switch='mrr=on,materialization=off';create table t0 (a int);insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);create table t1 (kp1 int, kp2 int, c int, filler char(100), key(kp1, kp2));insert into t1 select A.a+10*(B.a+10*C.a), 0, 0, 'filler' from t0 A, t0 B, t0 C;insert into t1 select * from t1 where kp1 < 20;create table t3 (a int);insert into t3 select A.a + 10*B.a from t0 A, t0 B;select * from t3 where a in (select kp1 from t1 where kp1<20);a012345678910111213141516171819explain select * from t3 where a in (select kp1 from t1 where kp1<20);id select_type table type possible_keys key key_len ref rows Extra1 PRIMARY t1 range kp1 kp1 5 NULL 48 Using where; Using index; LooseScan1 PRIMARY t3 ALL NULL NULL NULL NULL 100 Using where; Using join buffer (flat, BNL join)drop table t0,t1,t3;set optimizer_switch= @tmp_923246;set optimizer_switch=@subselect_sj_tmp;
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