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  1. MariaDB Server
  2. MDEV-27972

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

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      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
      

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              Assignee:
              rucha174 Rucha Deodhar
              Reporter:
              lstartseva Lena Startseva
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                Dates

                Created:
                Updated:
                Resolved:

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