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Wrong Result when Fix for Bug 21099502 is Present on a Query which Uses UNION View and GROUP BY Clause (Doc ID 2536136.1)

Last updated on MAY 02, 2019

Applies to:

Oracle Database - Enterprise Edition - Version 11.2.0.4 and later
Oracle Database - Standard Edition - Version 11.2.0.4 and later
Information in this document applies to any platform.

Symptoms

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Wrong result may be seen when the fix to bug 21099502 is present on a query which uses UNION view whose branches have GROUP BY clause, and there is a predicate in the outer query block.

Example:
SELECT
    T1.COL1
FROM
    T1,
    ( SELECT COL1,
             COL2
        FROM T1
       WHERE COL3 = 1
       UNION
      SELECT COL1,
             MAX(COL2)
        FROM T1
       WHERE COL3 = 2
       GROUP BY COL1 ) SUB
WHERE
    T1.COL1 = SUB.COL1 AND
    T1.COL2 = SUB.COL2 AND
    T1.COL1 in ('1','2','3','4');

 

Changes

None

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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