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  1. MariaDB Server
  2. MDEV-5689

ExtractValue(xml, 'substring(/x,/y)') crashes

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 5.3.12, 5.5.33a, 10.0.6
    • Fix Version/s: 10.0.10
    • Component/s: None
    • Labels:
      None

      Description

      This query crashes the server:

      SELECT ExtractValue('<a><b>abc</b><c>2</c><d>1</d></a>','substring(/a/b,..)');

      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)');
      +--------------------------------------------------------------------------+
      | ExtractValue('<a><b>abc</b><c>2</c><d>1</d></a>','substring(/a/b,/a/c)') |
      +--------------------------------------------------------------------------+
      | bc                                                                       |
      +--------------------------------------------------------------------------+
      1 row in set (0.00 sec)

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              Assignee:
              bar Alexander Barkov
              Reporter:
              bar Alexander Barkov
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                Dates

                Created:
                Updated:
                Resolved: