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  1. MariaDB Server
  2. MDEV-17001

JSON_MERGE returns nullwhen merging empty array

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Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 10.2.12, 10.2(EOL), 10.3(EOL)
    • 10.2.18
    • JSON
    • None
    • CentOS 7 (64bit)

    Description

      Issue

       SELECT JSON_MERGE('[1]', '[]');
      		 
      +-------------------------+
      		 
      | JSON_MERGE('[1]', '[]') |
      		 
      +-------------------------+
      		 
      | NULL                    |
      		 
      +-------------------------+
      		 
      1 row in set, 1 warning (0.00 sec)
      		 
       
      		 
      SHOW WARNINGS;
      		 
      +---------+------+--------------------------------------------------------------------------------+
      		 
      | Level   | Code | Message                                                                        |
      		 
      +---------+------+--------------------------------------------------------------------------------+
      		 
      | Warning | 4038 | Syntax error in JSON text in argument 1 to function 'json_merge' at position 5 |
      		 
      +---------+------+--------------------------------------------------------------------------------+

      Expected Result

       SELECT JSON_MERGE('[1]', '[]');
      		 
      +-------------------------+
      		 
      | JSON_MERGE('[1]', '[]') |
      		 
      +-------------------------+
      		 
      | [1]                    |
      		 
      +-------------------------+

      Attachments

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-17121 JSON_ARRAY_APPEND

          • Major - Major loss of function.
          • Closed

          Activity

            People

              holyfoot Alexey Botchkov
              bubasscs@gmail.com Buba
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                Resolved:

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