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Problem IC63837
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Status: Closed |
SELECT DISTINCT WITH LANGUAGE AWARE COLLATION SEQUENCE WITH EO S1 ATTRIBUTE MAY RETURN WRONG RESULTS |
| product: |
DB2 FOR LUW / DB2FORLUW / 970 - DB2 |
| Problem description: |
In a unicode database which was created with a language aware
collation sequence, like "UCA500R1_LROOT_AN_CX_EO_FX_HX_NX_S1"
a SELECT DISTINCT may return wrong results.
The problem is that despite attributes "EO S1" are specified,
which should respect case sensitivity, a string may be sorted as
a duplicate and therefore may be missing from the result set.
This problem happens only if the case difference is after the
7th character.
For example suppose 5 rows containing the column values:
Achter de Hoven
Achter de Hoven
Achter De Hoven
Achter de Hoven
Achter de Hovenstraat
Then a "select distinct(column) ..." returns just:
Achter de Hoven
Achter de Hovenstraat
which is wrong because "Achter De Hoven" is missing. The case
sensitivity was not respected. |
| Problem Summary: |
Users Affected: ALL
Problem Description: See Error Description.
Problem Summary: See Error Description. |
| Local Fix: |
Either:
Creating an index on the column allows select distinct to return
the correct result.
Or:
Avoid a BINSORT used by DB2 internally by setting registry
variable:
db2set DB2_BINSORT=off |
| available fix packs: |
DB2 Version 9.7 Fix Pack 2 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 3 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 3a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 5 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 6 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 7 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9a for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 8 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 9 for Linux, UNIX, and Windows
DB2 Version 9.7 Fix Pack 10 for Linux, UNIX, and Windows
|
| Solution |
First fixed in DB2 UDB Version 9.7, FixPak 2 (build s100514) |
| Workaround |
see LOCAL FIX. |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 20.10.2009
09.06.2010
09.06.2010 |
| Problem solved at the following versions (IBM BugInfos) |
9.7.
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.7.0.2
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