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  1. MariaDB Server
  2. MDEV-24538

JSON_LENGTH does not return error upon wrong number of parameters

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    Description

      JSON_LENGTH documented (both for MariaDB and MySQL) as taking one mandatory and one optional parameter:

      JSON_LENGTH(json_doc[, path])

      However, in MariaDB it accepts extra parameters without complaining:

      10.5 1b12e251

      		 
      MariaDB [test]> SELECT JSON_LENGTH('{"a":"b"}','$','$', 'foo');
      		 
      +-----------------------------------------+
      		 
      | JSON_LENGTH('{"a":"b"}','$','$', 'foo') |
      		 
      +-----------------------------------------+
      		 
      |                                       1 |
      		 
      +-----------------------------------------+
      		 
      1 row in set (0.000 sec)

      MySQL returns an error:

      MySQL [test]> SELECT JSON_LENGTH('{"a":"b"}','$','$', 'foo');
      		 
      ERROR 1582 (42000): Incorrect parameter count in the call to native function 'JSON_LENGTH'

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            danblack Daniel Black
            elenst Elena Stepanova
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              Updated:
              Resolved:

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