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  1. MariaDB Server
  2. MDEV-39974

Array wildcard in JSON path returns incorrect results when the key is null

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Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Duplicate
    • 13.1
    • N/A
    • JSON
    • None
    • Not for Release Notes

    Description

      Hi,

      I found that when a JSON data has a NULL key, the array wildcard of the JSON path will return incorrect results:

      SELECT JSON_QUERY('{"a":[0,{"b":1}]}', '$.a[*]'); -- {"b":1}, expected 
      SELECT JSON_QUERY('{"a":[null,{"b":1}]}', '$.a[*]'); -- NULL, unexpected
      		 
      SELECT JSON_QUERY('{"a":[null,{"b":1}]}', '$.a[1]'); -- {"b":1}, expected
      		 
      SELECT JSON_KEY_VALUE('{"a":[0,{"b":1}]}', '$.a[*]'); -- [{"key": "b", "value": 1}], expected
      		 
      SELECT JSON_KEY_VALUE('{"a":[null,{"b":1}]}', '$.a[*]'); -- NULL, unexpected
      		 
      SELECT JSON_KEY_VALUE('{"a":[null,{"b":1}]}', '$.a[1]'); -- [{"key": "b", "value": 1}], expected

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        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. MDEV-39934 Incorrect result of JSON_QUERY and JSON_KEY_VALUE with wildcard

          • Major - Major loss of function.
          • Confirmed

          Activity

            People

              shipjain Shipra Jain
              ChiZhang Chi Zhang
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              Dates

                Created:
                Updated:
                Resolved:

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