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  1. MariaDB Server
  2. MDEV-11465

JSON_LENGTH returns incorrect length

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      Compare:

      MariaDB 10.2

      MariaDB [test]> select json_length('{}');
      +-------------------+
      | json_length('{}') |
      +-------------------+
      |                 1 |
      +-------------------+
      1 row in set (0.01 sec)
       
      MariaDB [test]> SELECT JSON_LENGTH('[1, 2, {"a": 3}]');
      +---------------------------------+
      | JSON_LENGTH('[1, 2, {"a": 3}]') |
      +---------------------------------+
      |                               4 |
      +---------------------------------+
      1 row in set (0.00 sec)
      

      MySQL 5.7

      MySQL [test]> select json_length('{}');
      +-------------------+
      | json_length('{}') |
      +-------------------+
      |                 0 |
      +-------------------+
      1 row in set (0.00 sec)
       
      MySQL [test]> SELECT JSON_LENGTH('[1, 2, {"a": 3}]');
      +---------------------------------+
      | JSON_LENGTH('[1, 2, {"a": 3}]') |
      +---------------------------------+
      |                               3 |
      +---------------------------------+
      1 row in set (0.01 sec)
      

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