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Merge olga.mysql.com:/home/igor/mysql-4.1-opt

Browse Source 
into  olga.mysql.com:/home/igor/mysql-5.0-opt


sql/item_subselect.cc:
  Auto merged
mysql-test/r/subselect.result:
  Manual merge
mysql-test/t/subselect.test:
  Manual merge
sql/item_subselect.h:
  Manual merge
This commit is contained in:
unknown
2006-12-12 11:53:09 -08:00
parent 4108725364 33446269e1
commit 22192d083a
4 changed files with 44 additions and 3 deletions
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13
mysql-test/r/subselect.result
View File

@ -3033,6 +3033,19 @@ t3 CREATE TABLE `t3` (
`a` datetime default NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1,t2,t3;
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (1), (2);
SELECT a FROM t1 WHERE (SELECT 1 FROM DUAL WHERE 1=0) > 0;
a
SELECT a FROM t1 WHERE (SELECT 1 FROM DUAL WHERE 1=0) IS NULL;
a
1
2
EXPLAIN SELECT a FROM t1 WHERE (SELECT 1 FROM DUAL WHERE 1=0) IS NULL;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
2 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
DROP TABLE t1;
create table t1 (df decimal(5,1));
insert into t1 values(1.1);
insert into t1 values(2.2);

12
mysql-test/t/subselect.test
View File

@ -1988,6 +1988,18 @@ SHOW CREATE TABLE t3;
DROP TABLE t1,t2,t3;
#
# Bug 24670: subquery witout tables but with a WHERE clause
#
CREATE TABLE t1 (a int);
INSERT INTO t1 VALUES (1), (2);
SELECT a FROM t1 WHERE (SELECT 1 FROM DUAL WHERE 1=0) > 0;
SELECT a FROM t1 WHERE (SELECT 1 FROM DUAL WHERE 1=0) IS NULL;
EXPLAIN SELECT a FROM t1 WHERE (SELECT 1 FROM DUAL WHERE 1=0) IS NULL;
DROP TABLE t1;
# End of 4.1 tests
#