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  1. Derby
  2. DERBY-5893

Add support for the SQL:2008 standard IS [ NOT ] DISTINCT FROM predicate

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    Details

    • Type: Improvement
    • Status: Open
    • Priority: Minor
    • Resolution: Unresolved
    • Affects Version/s: 10.9.1.0
    • Fix Version/s: None
    • Component/s: SQL
    • Urgency:
      Normal

      Description

      The SQL:1999 standard specifies the IS [ NOT ] DISTINCT FROM predicate in chapter 8.15 <distinct predicate>:

      <distinct predicate> ::=
      <row value predicand 3> <distinct predicate part 2>

      <distinct predicate part 2> ::=
      IS [ NOT ] DISTINCT FROM <row value predicand 4>

      <row value predicand 3> ::=
      <row value predicand>

      <row value predicand 4> ::=
      <row value predicand>

      This predicate is supported by at least these databases:

      It would probably make sense for the Derby database to implement it as well.

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            • Assignee:
              Unassigned
              Reporter:
              lukas.eder Lukas Eder
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              • Created:
                Updated: