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Problem IT26322
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Status: Closed |
JOIN OF COLUMN-ORGANIZED TABLES MIGHT RETURN INCORRECT RESULTS
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| product: |
DB2 FOR LUW / DB2FORLUW / B10 - DB2 |
| Problem description: |
Wrong result might output from queries containing
join on columnar tables and implicit column equivalence and join
predicates with expressions
Wrong results might occur when running a query with the
following characteristics:
1) the query joins multiple column organized tables
2) the join predicates reference expressions
3) implicit column equivalence can be derived from these join
predicates |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* Columnar Organized tables *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description. Please, install v11 Fixpak 4. *
****************************************************************
* RECOMMENDATION: *
* See Error Description. Please, install v11 Fixpak 4 on DB2 *
* Server *
**************************************************************** |
| Local Fix: |
Work-around:
1) Lower optlevel
2) force the join order to join tables with join predicate first
3) rewrite the query to add join predicates to express the
implicit column equivalence |
| Solution |
|
| Workaround |
See LOCAL FIX |
| BUG-Tracking |
forerunner :
follow-up : IT26439 |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 18.09.2018
23.12.2018
23.12.2018 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
