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MDEV-15118 ExtractValue(xml,something_complex) does not work

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Item_xml_str_func::fix_fields() used a local "String tmp" as a buffer
for args[1]->val_str(). "tmp" was freed at the end of fix_fields(),
while Items created during my_xpath_parse() still pointed to its fragments.

Adding a new member Item_xml_str_func::m_xpath_query and store the result
of args[1]->val_str() into it.
This commit is contained in:
Alexander Barkov
2018-01-30 11:07:35 +04:00
parent b76881a23c
commit dae4fb0acb
4 changed files with 30 additions and 2 deletions
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9
mysql-test/t/xml.test
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@ -748,6 +748,15 @@ SELECT *,IF(@i:=c1,ExtractValue('<a><b>b1</b><b>b2</b></a>','//b[$@i]'),0) AS xp
SELECT * FROM t1 WHERE c2=IF(@i:=c1,ExtractValue('<a><b>b1</b><b>b2</b></a>','//b[$@i]'),0);
DROP TABLE t1;
--echo #
--echo # MDEV-15118 ExtractValue(xml,something_complex) does not work
--echo #
CREATE TABLE t1 (a TEXT);
INSERT INTO t1 VALUES (CONCAT('<a>aaa</a>'));
SELECT ExtractValue(a, '/a') AS a FROM t1;
SELECT ExtractValue(a, FROM_BASE64(TO_BASE64('/a'))) AS a FROM t1;
DROP TABLE t1;
--echo #
--echo # End of 10.0 tests