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  1. MariaDB Server
  2. MDEV-27972

Unexpected behavior with negative zero (-0) in JSON Path

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Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 10.9(EOL)
    • 10.9.0
    • JSON

    Description

      Test:

      SET @json='{ "x": [0,1]}';
      		 
      SELECT JSON_VALUE(@json,'$.x[last]');
      		 
      SELECT JSON_VALUE(@json,'$.x[last-0]');
      		 
      SELECT JSON_VALUE(@json,'$.x[-0]');
      		 
      SELECT JSON_VALUE(@json,'$.x[0]');

      Expected result:
      Expected that 'last' and 'last-0' give the same result

      SELECT JSON_VALUE(@json,'$.x[last]');
      		 
      JSON_VALUE(@json,'$.x[last]')
      		 
      1
      		 
      SELECT JSON_VALUE(@json,'$.x[last-0]');
      		 
      JSON_VALUE(@json,'$.x[last-0]')
      		 
      1

      and index '0' and '-0' too:

      SELECT JSON_VALUE(@json,'$.x[-0]');
      		 
      JSON_VALUE(@json,'$.x[-0]')
      		 
      0
      		 
      SELECT JSON_VALUE(@json,'$.x[0]');
      		 
      JSON_VALUE(@json,'$.x[0]')
      		 
      0

      but Actual result:

      SET @json='{ "x": [0,1]}';
      		 
      SELECT JSON_VALUE(@json,'$.x[last]');
      		 
      JSON_VALUE(@json,'$.x[last]')
      		 
      1
      		 
      SELECT JSON_VALUE(@json,'$.x[last-0]');
      		 
      JSON_VALUE(@json,'$.x[last-0]')
      		 
      NULL
      		 
      SELECT JSON_VALUE(@json,'$.x[-0]');
      		 
      JSON_VALUE(@json,'$.x[-0]')
      		 
      NULL
      		 
      SELECT JSON_VALUE(@json,'$.x[0]');
      		 
      JSON_VALUE(@json,'$.x[0]')
      		 
      0

      Attachments

        Issue Links

          relates to

          Task - A task that needs to be done. MDEV-22224 Support JSON Path negative index

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Activity

            People

              rucha174 Rucha Deodhar
              lstartseva Lena Startseva
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              Dates

                Created:
                Updated:
                Resolved:

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