At file:///home/bell/maria/bzr/work-maria-5.3-lb609043/ ------------------------------------------------------------ revno: 2808 revision-id: sanja@askmonty.org-20100730041658-2naumadh26t93e3g parent: sanja@askmonty.org-20100729111348-jjp89wlvs3kg0fqq committer: sanja@askmonty.org branch nick: work-maria-5.3-lb609043 timestamp: Fri 2010-07-30 07:16:58 +0300 message: Fix for luanchpad bug#609043 Removed indirect reference in equalities for cache index lookup. We should use a direct reference because some optimization of the query may optimize out a condition predicate and if the outer reference is the only element of the condition predicate the indirect reference becomes NULL. We can resolve correctly the indirect reference in Expression_cache_tmptable::make_equalities because it is called before optimization of the cached subquery. === modified file 'mysql-test/r/subquery_cache.result' --- a/mysql-test/r/subquery_cache.result 2010-07-29 11:13:48 +0000 +++ b/mysql-test/r/subquery_cache.result 2010-07-30 04:16:58 +0000 @@ -2881,3 +2881,107 @@ field1 field2 field3 field4 field5 field6 field7 field8 field9 field10 drop table t1,t2,t3,t4,t5; set @@optimizer_switch= default; +#launchpad BUG#609043 +CREATE TABLE `t1` ( +`pk` int(11) NOT NULL AUTO_INCREMENT, +`col_int_nokey` int(11) DEFAULT NULL, +`col_int_key` int(11) DEFAULT NULL, +`col_date_key` date DEFAULT NULL, +`col_date_nokey` date DEFAULT NULL, +`col_time_key` time DEFAULT NULL, +`col_time_nokey` time DEFAULT NULL, +`col_datetime_key` datetime DEFAULT NULL, +`col_datetime_nokey` datetime DEFAULT NULL, +`col_varchar_key` varchar(1) DEFAULT NULL, +`col_varchar_nokey` varchar(1) DEFAULT NULL, +PRIMARY KEY (`pk`), +KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) +) ENGINE=MyISAM AUTO_INCREMENT=21 DEFAULT CHARSET=latin1; +INSERT INTO `t1` VALUES (19,NULL,6,'2004-08-20','2004-08-20','05:03:03','05:03:03','2007-04-19 00:19:53','2007-04-19 00:19:53','f','f'); +INSERT INTO `t1` VALUES (20,4,2,'1900-01-01','1900-01-01','18:38:59','18:38:59','1900-01-01 00:00:00','1900-01-01 00:00:00','d','d'); +CREATE TABLE `t2` ( +`pk` int(11) NOT NULL AUTO_INCREMENT, +`col_int_nokey` int(11) DEFAULT NULL, +`col_int_key` int(11) DEFAULT NULL, +`col_date_key` date DEFAULT NULL, +`col_date_nokey` date DEFAULT NULL, +`col_time_key` time DEFAULT NULL, +`col_time_nokey` time DEFAULT NULL, +`col_datetime_key` datetime DEFAULT NULL, +`col_datetime_nokey` datetime DEFAULT NULL, +`col_varchar_key` varchar(1) DEFAULT NULL, +`col_varchar_nokey` varchar(1) DEFAULT NULL, +PRIMARY KEY (`pk`), +KEY `col_int_key` (`col_int_key`), +KEY `col_date_key` (`col_date_key`), +KEY `col_time_key` (`col_time_key`), +KEY `col_datetime_key` (`col_datetime_key`), +KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) +) ENGINE=MyISAM AUTO_INCREMENT=30 DEFAULT CHARSET=latin1; +CREATE TABLE `t3` ( +`pk` int(11) NOT NULL AUTO_INCREMENT, +`col_int_nokey` int(11) DEFAULT NULL, +`col_int_key` int(11) DEFAULT NULL, +`col_date_key` date DEFAULT NULL, +`col_date_nokey` date DEFAULT NULL, +`col_time_key` time DEFAULT NULL, +`col_time_nokey` time DEFAULT NULL, +`col_datetime_key` datetime DEFAULT NULL, +`col_datetime_nokey` datetime DEFAULT NULL, +`col_varchar_key` varchar(1) DEFAULT NULL, +`col_varchar_nokey` varchar(1) DEFAULT NULL, +PRIMARY KEY (`pk`), +KEY `col_int_key` (`col_int_key`), +KEY `col_date_key` (`col_date_key`), +KEY `col_time_key` (`col_time_key`), +KEY `col_datetime_key` (`col_datetime_key`), +KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) +) ENGINE=MyISAM AUTO_INCREMENT=2 DEFAULT CHARSET=latin1; +CREATE TABLE `t4` ( +`pk` int(11) NOT NULL AUTO_INCREMENT, +`col_int_nokey` int(11) DEFAULT NULL, +`col_int_key` int(11) DEFAULT NULL, +`col_date_key` date DEFAULT NULL, +`col_date_nokey` date DEFAULT NULL, +`col_time_key` time DEFAULT NULL, +`col_time_nokey` time DEFAULT NULL, +`col_datetime_key` datetime DEFAULT NULL, +`col_datetime_nokey` datetime DEFAULT NULL, +`col_varchar_key` varchar(1) DEFAULT NULL, +`col_varchar_nokey` varchar(1) DEFAULT NULL, +PRIMARY KEY (`pk`), +KEY `col_int_key` (`col_int_key`), +KEY `col_date_key` (`col_date_key`), +KEY `col_time_key` (`col_time_key`), +KEY `col_datetime_key` (`col_datetime_key`), +KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) +) ENGINE=MyISAM AUTO_INCREMENT=101 DEFAULT CHARSET=latin1; +INSERT INTO `t4` VALUES (100,2,5,'2001-07-26','2001-07-26','11:49:25','11:49:25','2007-04-25 05:08:49','2007-04-25 05:08:49','f','f'); +SET @@optimizer_switch = 'subquery_cache=off'; +/* cache is off */ SELECT COUNT( DISTINCT table2 .`col_int_key` ) , ( +SELECT SUBQUERY2_t1 .`col_int_key` +FROM t3 SUBQUERY2_t1 JOIN t2 ON SUBQUERY2_t1 .`col_int_key` +WHERE table1 .`col_varchar_key` ) , table2 .`col_varchar_nokey` field10 +FROM t4 table1 JOIN ( t1 table2 STRAIGHT_JOIN t1 table3 ON table2 .`pk` ) ON table3 .`col_varchar_key` = table2 .`col_varchar_key` +GROUP BY field10 ; +COUNT( DISTINCT table2 .`col_int_key` ) ( +SELECT SUBQUERY2_t1 .`col_int_key` +FROM t3 SUBQUERY2_t1 JOIN t2 ON SUBQUERY2_t1 .`col_int_key` +WHERE table1 .`col_varchar_key` ) field10 +1 NULL d +1 NULL f +SET @@optimizer_switch = 'subquery_cache=on'; +/* cache is on */ SELECT COUNT( DISTINCT table2 .`col_int_key` ) , ( +SELECT SUBQUERY2_t1 .`col_int_key` +FROM t3 SUBQUERY2_t1 JOIN t2 ON SUBQUERY2_t1 .`col_int_key` +WHERE table1 .`col_varchar_key` ) , table2 .`col_varchar_nokey` field10 +FROM t4 table1 JOIN ( t1 table2 STRAIGHT_JOIN t1 table3 ON table2 .`pk` ) ON table3 .`col_varchar_key` = table2 .`col_varchar_key` +GROUP BY field10 ; +COUNT( DISTINCT table2 .`col_int_key` ) ( +SELECT SUBQUERY2_t1 .`col_int_key` +FROM t3 SUBQUERY2_t1 JOIN t2 ON SUBQUERY2_t1 .`col_int_key` +WHERE table1 .`col_varchar_key` ) field10 +1 NULL d +1 NULL f +drop table t1,t2,t3,t4; +set @@optimizer_switch= default; === modified file 'mysql-test/t/subquery_cache.test' --- a/mysql-test/t/subquery_cache.test 2010-07-29 11:13:48 +0000 +++ b/mysql-test/t/subquery_cache.test 2010-07-30 04:16:58 +0000 @@ -1202,3 +1202,107 @@ drop table t1,t2,t3,t4,t5; set @@optimizer_switch= default; + + +# +--echo #launchpad BUG#609043 +# +CREATE TABLE `t1` ( + `pk` int(11) NOT NULL AUTO_INCREMENT, + `col_int_nokey` int(11) DEFAULT NULL, + `col_int_key` int(11) DEFAULT NULL, + `col_date_key` date DEFAULT NULL, + `col_date_nokey` date DEFAULT NULL, + `col_time_key` time DEFAULT NULL, + `col_time_nokey` time DEFAULT NULL, + `col_datetime_key` datetime DEFAULT NULL, + `col_datetime_nokey` datetime DEFAULT NULL, + `col_varchar_key` varchar(1) DEFAULT NULL, + `col_varchar_nokey` varchar(1) DEFAULT NULL, + PRIMARY KEY (`pk`), + KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) +) ENGINE=MyISAM AUTO_INCREMENT=21 DEFAULT CHARSET=latin1; +INSERT INTO `t1` VALUES (19,NULL,6,'2004-08-20','2004-08-20','05:03:03','05:03:03','2007-04-19 00:19:53','2007-04-19 00:19:53','f','f'); +INSERT INTO `t1` VALUES (20,4,2,'1900-01-01','1900-01-01','18:38:59','18:38:59','1900-01-01 00:00:00','1900-01-01 00:00:00','d','d'); + +CREATE TABLE `t2` ( + `pk` int(11) NOT NULL AUTO_INCREMENT, + `col_int_nokey` int(11) DEFAULT NULL, + `col_int_key` int(11) DEFAULT NULL, + `col_date_key` date DEFAULT NULL, + `col_date_nokey` date DEFAULT NULL, + `col_time_key` time DEFAULT NULL, + `col_time_nokey` time DEFAULT NULL, + `col_datetime_key` datetime DEFAULT NULL, + `col_datetime_nokey` datetime DEFAULT NULL, + `col_varchar_key` varchar(1) DEFAULT NULL, + `col_varchar_nokey` varchar(1) DEFAULT NULL, + PRIMARY KEY (`pk`), + KEY `col_int_key` (`col_int_key`), + KEY `col_date_key` (`col_date_key`), + KEY `col_time_key` (`col_time_key`), + KEY `col_datetime_key` (`col_datetime_key`), + KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) +) ENGINE=MyISAM AUTO_INCREMENT=30 DEFAULT CHARSET=latin1; + +CREATE TABLE `t3` ( + `pk` int(11) NOT NULL AUTO_INCREMENT, + `col_int_nokey` int(11) DEFAULT NULL, + `col_int_key` int(11) DEFAULT NULL, + `col_date_key` date DEFAULT NULL, + `col_date_nokey` date DEFAULT NULL, + `col_time_key` time DEFAULT NULL, + `col_time_nokey` time DEFAULT NULL, + `col_datetime_key` datetime DEFAULT NULL, + `col_datetime_nokey` datetime DEFAULT NULL, + `col_varchar_key` varchar(1) DEFAULT NULL, + `col_varchar_nokey` varchar(1) DEFAULT NULL, + PRIMARY KEY (`pk`), + KEY `col_int_key` (`col_int_key`), + KEY `col_date_key` (`col_date_key`), + KEY `col_time_key` (`col_time_key`), + KEY `col_datetime_key` (`col_datetime_key`), + KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) +) ENGINE=MyISAM AUTO_INCREMENT=2 DEFAULT CHARSET=latin1; + +CREATE TABLE `t4` ( + `pk` int(11) NOT NULL AUTO_INCREMENT, + `col_int_nokey` int(11) DEFAULT NULL, + `col_int_key` int(11) DEFAULT NULL, + `col_date_key` date DEFAULT NULL, + `col_date_nokey` date DEFAULT NULL, + `col_time_key` time DEFAULT NULL, + `col_time_nokey` time DEFAULT NULL, + `col_datetime_key` datetime DEFAULT NULL, + `col_datetime_nokey` datetime DEFAULT NULL, + `col_varchar_key` varchar(1) DEFAULT NULL, + `col_varchar_nokey` varchar(1) DEFAULT NULL, + PRIMARY KEY (`pk`), + KEY `col_int_key` (`col_int_key`), + KEY `col_date_key` (`col_date_key`), + KEY `col_time_key` (`col_time_key`), + KEY `col_datetime_key` (`col_datetime_key`), + KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) +) ENGINE=MyISAM AUTO_INCREMENT=101 DEFAULT CHARSET=latin1; +INSERT INTO `t4` VALUES (100,2,5,'2001-07-26','2001-07-26','11:49:25','11:49:25','2007-04-25 05:08:49','2007-04-25 05:08:49','f','f'); + +SET @@optimizer_switch = 'subquery_cache=off'; + +/* cache is off */ SELECT COUNT( DISTINCT table2 .`col_int_key` ) , ( +SELECT SUBQUERY2_t1 .`col_int_key` +FROM t3 SUBQUERY2_t1 JOIN t2 ON SUBQUERY2_t1 .`col_int_key` +WHERE table1 .`col_varchar_key` ) , table2 .`col_varchar_nokey` field10 +FROM t4 table1 JOIN ( t1 table2 STRAIGHT_JOIN t1 table3 ON table2 .`pk` ) ON table3 .`col_varchar_key` = table2 .`col_varchar_key` +GROUP BY field10 ; + +SET @@optimizer_switch = 'subquery_cache=on'; + +/* cache is on */ SELECT COUNT( DISTINCT table2 .`col_int_key` ) , ( +SELECT SUBQUERY2_t1 .`col_int_key` +FROM t3 SUBQUERY2_t1 JOIN t2 ON SUBQUERY2_t1 .`col_int_key` +WHERE table1 .`col_varchar_key` ) , table2 .`col_varchar_nokey` field10 +FROM t4 table1 JOIN ( t1 table2 STRAIGHT_JOIN t1 table3 ON table2 .`pk` ) ON table3 .`col_varchar_key` = table2 .`col_varchar_key` +GROUP BY field10 ; + +drop table t1,t2,t3,t4; +set @@optimizer_switch= default; === modified file 'sql/sql_expression_cache.cc' --- a/sql/sql_expression_cache.cc 2010-07-10 10:37:30 +0000 +++ b/sql/sql_expression_cache.cc 2010-07-30 04:16:58 +0000 @@ -41,7 +41,6 @@ List<Item> args; List_iterator_fast li(*list); Item **ref; - Name_resolution_context *cn= NULL; DBUG_ENTER("Expression_cache_tmptable::make_equalities"); for (uint i= 1 /* skip result filed */; (ref= li++); i++) @@ -58,14 +57,7 @@ fld->type() == MYSQL_TYPE_NEWDECIMAL || fld->type() == MYSQL_TYPE_DECIMAL) { - if (!cn) - { - // dummy resolution context - cn= new Name_resolution_context(); - cn->init(); - } - args.push_front(new Item_func_eq(new Item_ref(cn, ref, "", "", FALSE), - new Item_field(fld))); + args.push_front(new Item_func_eq(*ref, new Item_field(fld))); } } if (args.elements == 1)