|
Problem IT32195
|
Status: Closed |
IF THE ROW WIDTH PROCESSED BY A PARTIAL AGGREGATION OPERATOR IS MORE THEN 32K THEN WE COULD GENERATE INCORRECT RESULTS
|
| product: |
DB2 FOR LUW / DB2FORLUW / B50 - DB2 |
| Problem description: |
IF THE ROW WIDTH GOING THROUGH A pGRPBY (PARTIAL AGGREGATION
OPERATOR ) IS MORE THEN 32K
AND SORTHEAP IS SUFFICIENTLY LARGE
THEN SOMETIMES Db2 COULD RETURN INCORRECT RESULTS .
example of plan:
8.33333
RETURN
( 1)
84.626
|
8.33333
GRPBY
( 2)
84.6256
|
8.33333
SCAN
( 3)
84.5942
|
8.33333
SORT
( 4)
84.5938
|
8.33333
pGRPBY |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* All *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* See Error Description and install fixpak with this fix. *
**************************************************************** |
| Local Fix: |
Disable partial aggregation by the following : db2set
DB2_REDUCED_OPTIMIZATION="NO_PEA,NO_PED"
recycle the instance
This is an internal registry variable setting to workaround this
problem.
The setting should be removed upon upgrade to the Fix pack level
containing this fix :
db2set DB2_REDUCED_OPTIMIZATION=
recycle the instance |
| Solution |
|
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 16.03.2020
30.06.2020
30.06.2020 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
