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Problem IT01347
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Status: Closed |
DB2 MIGHT TRAP WHILE COMPILING A SQL STATEMENT WITH A DISTINCT CLAUSE WHEN INTRA-PARTITION PARALLELISM IS ENABLED |
| product: |
DB2 FOR LUW / DB2FORLUW / A50 - DB2 |
| Problem description: |
The following is the typical stack trace produced if you
encounter this error:
sqlnn_erds
sqlng_build_IU_CLOB_obj
sqlng_process_sort_op
sqlngProcessLolepop
sqlng_build_thread
sqlng_scan_derived_table
sqlng_process_scan_op
sqlngProcessLolepop
The problem can occur under the following conditions:
- the optimizer chooses an all-probes list prefetch zigzag join
alternative
- there is a distinct clause that includes the fact table chosen
for the zigzag join
- intra-partition parallelism is enabled |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* Users running DB2 10.5 before Fix Pack 3 *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to DB2 version 10.5 Fix Pack 3 or above. *
**************************************************************** |
| Local Fix: |
Disable INTRA_PARALLEL for the problematic statement by setting
the CURRENT DEGREE special register to 1. |
| available fix packs: |
DB2 Cancun Release 10.5.0.4 (also known as Fix Pack 4) for Linux, UNIX, and Windows
DB2 Version 10.5 Fix Pack 9 for Linux, UNIX, and Windows
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| Solution |
|
| Workaround |
not known / see Local fix |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 28.04.2014
22.09.2014
22.09.2014 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
| 10.5.0.4
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