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Merge moonlight.intranet:/home/tomash/src/mysql_ab/mysql-4.1-runtime

Browse source 
into  moonlight.intranet:/home/tomash/src/mysql_ab/mysql-4.1-bug17047
This commit is contained in:
kroki/tomash@moonlight.intranet 2006-11-16 14:15:56 +03:00
commit 690cb27d05
3 changed files with 29 additions and 2 deletions
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8
mysql-test/r/func_in.result
View file

@ -202,3 +202,11 @@ select count(*) from t1 where id not in (1,2);
count(*)
1
drop table t1;
DROP TABLE IF EXISTS t1;
CREATE TABLE t1 SELECT 1 IN (2, NULL);
SELECT should return NULL.
SELECT * FROM t1;
1 IN (2, NULL)
NULL
DROP TABLE t1;
End of 4.1 tests

22
mysql-test/t/func_in.test
View file

@ -109,4 +109,24 @@ select count(*) from t1 where id not in (1);
select count(*) from t1 where id not in (1,2);
drop table t1;
# End of 4.1 tests
#
# BUG#17047: CHAR() and IN() can return NULL without signaling NULL
# result
#
# The problem was in the IN() function that ignored maybe_null flags
# of all arguments except the first (the one _before_ the IN
# keyword, '1' in the test case below).
#
--disable_warnings
DROP TABLE IF EXISTS t1;
--enable_warnings
CREATE TABLE t1 SELECT 1 IN (2, NULL);
--echo SELECT should return NULL.
SELECT * FROM t1;
DROP TABLE t1;
--echo End of 4.1 tests

1
sql/item_cmpfunc.cc
View file

@ -1998,7 +1998,6 @@ void Item_func_in::fix_length_and_dec()
if (cmp_type == STRING_RESULT)
in_item->cmp_charset= cmp_collation.collation;
}
maybe_null= args[0]->maybe_null;
max_length= 1;
}