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  1. MariaDB Server
  2. MDEV-11570

JSON_MERGE returns incorrect result

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 10.2
    • Fix Version/s: 10.2.3
    • Component/s: JSON
    • Labels:
      None

      Description

      MariaDB 10.2

      MariaDB [test]>  SELECT JSON_MERGE('[1, 2]', '{"id": 47}');
      +------------------------------------+
      | JSON_MERGE('[1, 2]', '{"id": 47}') |
      +------------------------------------+
      | [[1, 2], {"id": 47}]               |
      +------------------------------------+
      1 row in set (0.00 sec)
      

      MySQL 5.7

      MySQL [test]>  SELECT JSON_MERGE('[1, 2]', '{"id": 47}');
      +------------------------------------+
      | JSON_MERGE('[1, 2]', '{"id": 47}') |
      +------------------------------------+
      | [1, 2, {"id": 47}]                 |
      +------------------------------------+
      1 row in set (0.00 sec)
      

      An adjacent array and object are merged by autowrapping the object as an array and merging the two arrays.

      https://dev.mysql.com/doc/refman/5.7/en/json-modification-functions.html#function_json-append

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              Assignee:
              holyfoot Alexey Botchkov
              Reporter:
              elenst Elena Stepanova
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                Updated:
                Resolved: