XMLWordPrintableJSON

    Details

    • Type: Sub-task
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 1.20.0
    • Component/s: None

      Description

      ```
      JSON_LENGTH(*json_doc*[, *path*])
      ```

      Returns the length of a JSON document, or, if a path argument is given, the length of the value within the document identified by the path. Returns `NULL` if any argument is `NULL` or the path argument does not identify a value in the document. An error occurs if the json_doc argument is not a valid JSON document or the path argument is not a valid path expression or contains a {*} or }}{{`` wildcard.

      The length of a document is determined as follows:

      • The length of a scalar is 1.
      • The length of an array is the number of array elements.
      • The length of an object is the number of object members.
      • The length does not count the length of nested arrays or objects.

      Example Sql:

      // code placeholder
      SELECT JSON_LENGTH(v) AS c1
      ,JSON_LENGTH(v, 'lax $.a') AS c2
      ,JSON_LENGTH(v, 'strict $.a[0]') AS c3
      ,JSON_LENGTH(v, 'strict $.a[1]') AS c4
      FROM (VALUES ('{"a": [10, true]}')) AS t(v)
      LIMIT 10;

      Result:

      c1 c2 c3 c4
      1 2 1 1

       

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                x1q1j1 Forward Xu
                Reporter:
                x1q1j1 Forward Xu
              • Votes:
                0 Vote for this issue
                Watchers:
                4 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved:

                  Time Tracking

                  Estimated:
                  Original Estimate - Not Specified
                  Not Specified
                  Remaining:
                  Remaining Estimate - 0h
                  0h
                  Logged:
                  Time Spent - 13h 20m
                  13h 20m