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Add 5.0 part of fix for bug 17047.

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mysql-test/r/func_str.result:
  Add result for bug#17047: CHAR() and IN() can return NULL without
  signaling NULL result.
mysql-test/t/func_str.test:
  Add test case for bug#17047: CHAR() and IN() can return NULL without
  signaling NULL result.
sql/item_strfunc.cc:
  Add Item_str_func::fix_fields() implementation, and set maybe_null to
  TRUE if we are in the SQL mode that requires some functions to return
  null even if they normally do not.
sql/item_strfunc.h:
  Add declaration of Item_str_func::fix_fields().
  Do not reset maybe_null in Item_func_char::fix_length_and_dec().
This commit is contained in:
unknown 2006-11-16 14:06:51 +03:00
commit af22eb35e5
4 changed files with 44 additions and 3 deletions
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14
mysql-test/t/func_str.test
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@ -780,4 +780,18 @@ SELECT * FROM t1 INNER JOIN t2 ON code=id
DROP TABLE t1,t2;
#
# BUG#17047: CHAR() and IN() can return NULL without signaling NULL
# result
#
SET @orig_sql_mode = @@SQL_MODE;
SET SQL_MODE=traditional;
SELECT CHAR(0xff,0x8f USING utf8);
SELECT CHAR(0xff,0x8f USING utf8) IS NULL;
SET SQL_MODE=@orig_sql_mode;
--echo End of 5.0 tests