|
Problem IC68419
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Status: Closed |
POSSIBLE WRONG RESULTS: COALESCE ON FULL OUTER JOIN OF 2 SUBSELE CTS THAT OUTPUT >= 1 NOT-NULL COLUMNS AND A LITERAL OR GROUP BY |
| product: |
DB2 FOR LUW / DB2FORLUW / 980 - DB2 |
| Problem description: |
Incorrect results may be returned if following conditions are
satisfied:
1) FULL OUTER JOIN (FOJ) used in query
2) COALESCE function used on two or more columns after
application of FOJ
3) The first parameter column to COALESCE sources from a
not-nullable base-table column
4) The inputs to FOJ are nested subselects
5) One or both nested subselects either:
5.a) Output a constant literal as a column, which is used after
application of FOJ, OR
5.b) Contain a GROUP BY clause where the output columns of the
subselect are columns, literals, column functions or
deterministic functions only |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* ALL *
****************************************************************
* PROBLEM DESCRIPTION: *
* see ERROR DESCRIPTION *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 Version 9.8 Fix Pack 4. *
**************************************************************** |
| Local Fix: |
Rewrite any problematic queries to preclude any of the
conditions above, e.g., use a CASE expression instead of
COALESCE |
| available fix packs: |
DB2 Version 9.8 Fix Pack 4 for AIX and Linux
DB2 Version 9.8 Fix Pack 5 for AIX and Linux
|
| Solution |
First fixed in DB2 Version 9.8 Fix Pack 4. |
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 04.05.2010
09.08.2011
09.08.2011 |
| Problem solved at the following versions (IBM BugInfos) |
9.8.FP4
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.8.0.4
|
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