This query crashes the server:
SELECT ExtractValue('<a><b>abc</b><c>2</c><d>1</d></a>','substring(/a/b,..)');
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Notice '..' in the 'position' argument to XPath substring() function,
which obviously goes above the root XML element.
If I change the position argument to something inside the XML tree,
it works fine:
mysql> SELECT ExtractValue('<a><b>abc</b><c>2</c><d>1</d></a>','substring(/a/b,/a/c)');
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+--------------------------------------------------------------------------+
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| ExtractValue('<a><b>abc</b><c>2</c><d>1</d></a>','substring(/a/b,/a/c)') |
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+--------------------------------------------------------------------------+
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| bc |
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+--------------------------------------------------------------------------+
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1 row in set (0.00 sec)
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Bug
Major
