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Fixed a bug in optimiser with MERGE tables with non-unique values

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with aggregating functions.

This consistently crashed Mysql
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2002-06-15 20:59:42 +03:00
parent 451a5e510b
commit e9c43803dd
4 changed files with 26 additions and 4 deletions
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9
mysql-test/r/merge.result
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@ -462,3 +462,12 @@ a b
6 1
6 2
drop table if exists t6, t5, t4, t3, t2, t1;
CREATE TABLE t1 ( a int(11) NOT NULL default '0', b int(11) NOT NULL default '0', PRIMARY KEY (a,b)) TYPE=MyISAM;
INSERT INTO t1 VALUES (1,1), (2,1);
CREATE TABLE t2 ( a int(11) NOT NULL default '0', b int(11) NOT NULL default '0', PRIMARY KEY (a,b)) TYPE=MyISAM;
INSERT INTO t2 VALUES (1,2), (2,2);
CREATE TABLE t ( a int(11) NOT NULL default '0', b int(11) NOT NULL default '0', KEY a (a,b)) TYPE=MRG_MyISAM UNION=(t1,t2);
select max(b) from t where a = 2;
max(b)
NULL
drop table if exists t,t1,t2;