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Fixed that LEFT OUTER JOIN was replaced with a regulat join

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in some cases, because "charset(x) = 'string'" was considered
as "x is not null" due to incorrect not_null_tables().
This commit is contained in:
bar@mysql.com
2005-03-24 18:10:46 +04:00
parent bd74a139dc
commit 29ffcad226
4 changed files with 40 additions and 1 deletions
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20
mysql-test/r/func_str.result
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@ -636,6 +636,26 @@ drop table t1;
select charset(null), collation(null), coercibility(null);
charset(null) collation(null) coercibility(null)
binary binary 5
CREATE TABLE t1 (a int, b int);
CREATE TABLE t2 (a int, b int);
INSERT INTO t1 VALUES (1,1),(2,2);
INSERT INTO t2 VALUES (2,2),(3,3);
select t1.*,t2.* from t1 left join t2 on (t1.b=t2.b)
where collation(t2.a) = _utf8'binary' order by t1.a,t2.a;
a b a b
1 1 NULL NULL
2 2 2 2
select t1.*,t2.* from t1 left join t2 on (t1.b=t2.b)
where charset(t2.a) = _utf8'binary' order by t1.a,t2.a;
a b a b
1 1 NULL NULL
2 2 2 2
select t1.*,t2.* from t1 left join t2 on (t1.b=t2.b)
where coercibility(t2.a) = 2 order by t1.a,t2.a;
a b a b
1 1 NULL NULL
2 2 2 2
DROP TABLE t1, t2;
select SUBSTR('abcdefg',3,2);
SUBSTR('abcdefg',3,2)
cd