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  1. MariaDB Server
  2. MDEV-33477

Prepare statement with only placeholders in Table Value Constructor discards values silently

Details

    • Bug
    • Status: Confirmed (View Workflow)
    • Major
    • Resolution: Unresolved
    • 11.0.4, 11.2.3, 10.4(EOL), 10.5, 10.6, 10.11, 11.0(EOL), 11.1(EOL), 11.2(EOL), 11.3(EOL)
    • 10.5, 10.6, 10.11
    • None

    Description

      Executing a prepared statement with only placeholders in a Table Value Constructor expression silently returns an empty string instead of the actual value.

      EXECUTE IMMEDIATE 'SELECT * FROM (VALUES (?)) test' USING 'a';

      Expected output:

      ?
      a

      Got output:

      ?
       

      It does work if any of the values in the TVC is not a placeholder:

      EXECUTE IMMEDIATE 'SELECT * FROM (VALUES (?, "b")) test' USING 'a';

      Got output:

      ?
      a
      b

      These types of TVC expressions would commonly be used in combination with a CTE to get named columns.

      Does work as expected on 11.0.3.

      Attachments

        Issue Links

          is caused by

          Bug - A problem which impairs or prevents the functions of the product. MDEV-32225 Test case from opt_tvc.test fails with statement memory protection

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

          Activity

            alice Alice Sherepa added a comment -

            Thank you for the report!
            I repeated as described on 10.4-11.4. Regression after ab9b1461a06fa3ed7e9d032f4db645ed60d51663 commit

            alice Alice Sherepa added a comment - Thank you for the report! I repeated as described on 10.4-11.4. Regression after ab9b1461a06fa3ed7e9d032f4db645ed60d51663 commit

            People

              igor Igor Babaev
              pimbroekhof Pim Broekhof
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              Dates

                Created:
                Updated:

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