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Problem IT34104
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Status: Closed |
DB2 QUERY MAY HANG WITH REGISRTY SETTING INJ_DUMMY_PRD4JOIN
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| product: |
DB2 FOR LUW / DB2FORLUW / B10 - DB2 |
| Problem description: |
Db2 query may hang when the following conditions are met:
-The query has inner join with OR predicate
-At least one of the OR predicate references only one
join/subgraph. |
| Problem Summary: |
****************************************************************
* USERS AFFECTED: *
* DB2 V11.1.4 *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* none *
**************************************************************** |
| Local Fix: |
Turn the registry off:
db2set -im DB2_EXTENDED_OPTIMIZATION="INJ_DUMMY_PRD4JOIN OFF"
or apply the above using optimizer guidelines as
/*
*/ ; |
| Solution |
|
| Workaround |
****************************************************************
* USERS AFFECTED: *
* DB2 V11.1.4 *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* none *
**************************************************************** |
| Timestamps |
Date - problem reported :
Date - problem closed :
Date - last modified :
| 03.09.2020
15.03.2021
15.03.2021 |
| Problem solved at the following versions (IBM BugInfos) |
|
| Problem solved according to the fixlist(s) of the following version(s) |
