|
Problem IC78930
|
Status: Closed |
UNABLE TO SORT WHEN USING OLAP FUNCTION AND "ORDER BY" |
| product: |
DB2 FOR LUW / DB2FORLUW / 910 - DB2 |
| Problem description: |
When using the "ORDER BY DESC" or "ORDER BY ASC" clause within
an SQL statement
containing an OLAP function, the order might not be enforced
giving unordered results
Per example:
db2 "select row_number() over() as num, tabname from
syscat.tables order by num desc"
gives an unordered result although DESC is specified. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* Users of OLAP functions in SQL statements *
****************************************************************
* PROBLEM DESCRIPTION: *
* When using the "ORDER BY DESC" or "ORDER BY ASC" clause *
* within *
* an SQL statement *
* containing an OLAP function, the order might not be enforced *
* giving unordered results *
* *
* For example: *
* db2 "select row_number() over() as num, tabname from *
* syscat.tables order by num desc" *
* gives an unordered result although DESC is specified. *
****************************************************************
* RECOMMENDATION: *
* Please upgrade to DB2 LUW V9.1 FP11 *
**************************************************************** |
| Local Fix: |
|
| available fix packs: |
DB2 Version 9.1 Fix Pack 11 for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 12 for Linux, UNIX and Windows
|
| Solution |
Problem was fixed in DB2 LUW V9.1 FP11 |
| Workaround |
1)"order by 1"
db2 "select row_number() over() as num, tabname from
syscat.tables
order by 1 desc"
.
2)the OLAP query can be moved into a nested subquery
db2 "select num, tabname from ( select row_number() over() as
num,
tabname from syscat.tables ) T order by num desc" |
| BUG-Tracking |
forerunner : APAR is sysrouted TO one or more of the following: IC78931
follow-up : |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 27.09.2011
23.12.2011
23.12.2011 |
| Problem solved at the following versions (IBM BugInfos) |
9.1.FP11
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 9.1.0.11
|
 |
