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Problem IC99315
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Status: Geschlossen |
QUERY PERFORMANCE MAY BE POOR IN A FEDERATED DPF ENVIRONMENT FOR QUERIES INVOLVING THE LATERAL KEYWORD IN THE STATEMENT TEXT |
| Produkt: |
DB2 FOR LUW / DB2FORLUW / A50 - DB2 |
| Problembeschreibung: |
Query performance may be poor in a Federated DPF environment for
queries involving the LATERAL keyword in the statement text.
Affected queries would typically contain the LATERAL keyword for
a sub-select of the query, an ORDER BY clause within the
subselect along with predicates containing references to outer
sub-selects, tables or nicknames from the query.
The output from db2exfmt will typically show a FILTER operation
above the SHIP operations containing the correlated predicate. |
| Problem-Zusammenfassung: |
****************************************************************
* USERS AFFECTED: *
* Users who use db2 v10.5 DPF *
****************************************************************
* PROBLEM DESCRIPTION: *
* See Error Description *
****************************************************************
* RECOMMENDATION: *
* Upgrade to db2 v10.5 fp4 or above *
**************************************************************** |
| Local-Fix: |
Manually write the query to push the correlated predicates into
any nested views |
| verfügbare FixPacks: |
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
|
| Lösung |
The problem is fixed in v10.5 fp4 |
| Workaround |
keiner bekannt / siehe Local-Fix |
| Weitere Daten |
Datum - Problem gemeldet :
Datum - Problem geschlossen :
Datum - der letzten Änderung:
| 12.02.2014
08.09.2014
08.09.2014 |
| Problem behoben ab folgender Versionen (IBM BugInfos) |
|
| Problem behoben lt. FixList in der Version |
| 10.5.0.4
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