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Fix for bug #32557: order by updatexml causes assertion in filesort

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Problem: even if an Item_xml_str_func successor returns NULL, it doesn't have 
a corresponding property (maybe_null) set, that leads to a failed assertion.

Fix: set nullability property of Item_xml_str_func.


mysql-test/r/xml.result:
  Fix for bug #32557: order by updatexml causes assertion in filesort
    - test result.
mysql-test/t/xml.test:
  Fix for bug #32557: order by updatexml causes assertion in filesort
    - test case.
sql/item_xmlfunc.h:
  Fix for bug #32557: order by updatexml causes assertion in filesort
    - set Item_xml_str_func::maybe_null.
This commit is contained in:
unknown 2007-11-21 16:00:09 +04:00
commit 961cc887bf
3 changed files with 25 additions and 2 deletions
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8
mysql-test/t/xml.test
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@ -543,4 +543,12 @@ select updatexml(NULL, NULL, 1), updatexml(1, NULL, NULL),
updatexml(NULL, 1, NULL);
select updatexml(NULL, NULL, NULL);
#
# Bug #32557: order by updatexml causes assertion in filesort
#
CREATE TABLE t1(a INT NOT NULL);
INSERT INTO t1 VALUES (0), (0);
SELECT 1 FROM t1 ORDER BY(UPDATEXML(a, '1', '1'));
DROP TABLE t1;
--echo End of 5.1 tests