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fixed not_null_tables() for IN() (BUG#9393)

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(IN() remove NULL rows only for tables from first argument (value which we looking for in IN() list) but not for tables from IN() list)
Also it will be better change Item::not_null_tables() to prohibit this optimisation by default for new created items in 5.0 or 5.1.


mysql-test/r/select.result:
  IN with outer join condition
mysql-test/t/select.test:
  IN with outer join condition
sql/item_cmpfunc.h:
  correct not_null_tables() for IN
This commit is contained in:
unknown
2005-06-28 22:20:25 +03:00
parent d8edc2db59
commit 3aca0a0c62
3 changed files with 30 additions and 0 deletions
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9
mysql-test/r/select.result
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@ -2515,3 +2515,12 @@ SELECT b FROM t1 WHERE b=0x8000000000000000;
b b
9223372036854775808 9223372036854775808
DROP TABLE t1; DROP TABLE t1;
CREATE TABLE `t1` ( `gid` int(11) default NULL, `uid` int(11) default NULL);
CREATE TABLE `t2` ( `ident` int(11) default NULL, `level` char(16) default NULL);
INSERT INTO `t2` VALUES (0,'READ');
CREATE TABLE `t3` ( `id` int(11) default NULL, `name` char(16) default NULL);
INSERT INTO `t3` VALUES (1,'fs');
select * from t3 left join t1 on t3.id = t1.uid, t2 where t2.ident in (0, t1.gid, t3.id, 0);
id name gid uid ident level
1 fs NULL NULL 0 READ
drop table t1,t2,t3;

15
mysql-test/t/select.test
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@ -2060,3 +2060,18 @@ CREATE TABLE t1 (b BIGINT(20) UNSIGNED NOT NULL, PRIMARY KEY (b));
INSERT INTO t1 VALUES (0x8000000000000000); INSERT INTO t1 VALUES (0x8000000000000000);
SELECT b FROM t1 WHERE b=0x8000000000000000; SELECT b FROM t1 WHERE b=0x8000000000000000;
DROP TABLE t1; DROP TABLE t1;
#
# IN with outer join condition (BUG#9393)
#
CREATE TABLE `t1` ( `gid` int(11) default NULL, `uid` int(11) default NULL);
CREATE TABLE `t2` ( `ident` int(11) default NULL, `level` char(16) default NULL);
INSERT INTO `t2` VALUES (0,'READ');
CREATE TABLE `t3` ( `id` int(11) default NULL, `name` char(16) default NULL);
INSERT INTO `t3` VALUES (1,'fs');
select * from t3 left join t1 on t3.id = t1.uid, t2 where t2.ident in (0, t1.gid, t3.id, 0);
drop table t1,t2,t3;

6
sql/item_cmpfunc.h
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@ -769,6 +769,12 @@ class Item_func_in :public Item_int_func
bool nulls_in_row(); bool nulls_in_row();
bool is_bool_func() { return 1; } bool is_bool_func() { return 1; }
CHARSET_INFO *compare_collation() { return cmp_collation.collation; } CHARSET_INFO *compare_collation() { return cmp_collation.collation; }
/*
IN() protect from NULL only first argument, if construction like
"expression IN ()" will be allowed, we will need to check number of
argument here, because "NOT(NULL IN ())" is TRUE.
*/
table_map not_null_tables() const { return args[0]->not_null_tables(); }
}; };
/* Functions used by where clause */ /* Functions used by where clause */