Derby
  1. Derby
  2. DERBY-4704

Incorrect nullability when casting non-nullable VARCHAR to BOOLEAN

    Details

    • Type: Bug Bug
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: 10.7.1.1
    • Fix Version/s: 10.7.1.1
    • Component/s: SQL
    • Labels:
      None
    • Issue & fix info:
      Patch Available
    • Bug behavior facts:
      Wrong query result

      Description

      With the following table definition and query

      CREATE TABLE T (X VARCHAR(10) NOT NULL);
      INSERT INTO T VALUES 'true', 'false', 'unknown';
      SELECT CAST(X AS BOOLEAN) FROM T;

      the meta-data for the returned result will say that the column is not nullable, although it will contain a NULL value in the third row.

      1. derby-4704-01-aa-nullability.diff
        4 kB
        Rick Hillegas
      2. repro.diff
        2 kB
        Knut Anders Hatlen

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            • Assignee:
              Rick Hillegas
              Reporter:
              Knut Anders Hatlen
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              Dates

              • Created:
                Updated:
                Resolved:

                Development