DB2 - Problem description
Problem IC72054 | Status: Closed |
EXPLAIN OF FEDERATED QUERY INDICATES PREDICATE APPLIED TO WRONG OR NON-EXISTENT OPERATOR | |
product: | |
DB2 FOR LUW / DB2FORLUW / 950 - DB2 | |
Problem description: | |
A predicate may not show up in the explain output (db2exfmt, Visual Explain, Optimum Query Tuner), or it may be associated with the wrong operator, when a query against a remote table is explained, and that query includes a predicate against that remote table. You are experiencing this problem if the following query returns a non-zero count: select count(*) from explain_predicate where operator_id > (select max(operator_id) from explain_operator) You are also experiencing this problem if a local predicate is applied to an operator that does not contain the columns associated with that predicate. | |
Problem Summary: | |
**************************************************************** * USERS AFFECTED: * * User of FEDERATED funtionality * **************************************************************** * PROBLEM DESCRIPTION: * * A predicate may not show up in the explain output (db2exfmt, * * Visual Explain, Optimum Query Tuner), or it may be * * associated with the wrong operator, when a query against a * * remote table is explained, and that query includes a * * predicate against that remote table. * * * * You are experiencing this problem if the following query * * returns a non-zero count: * * select count(*) from explain_predicate where operator_id > * * (select max(operator_id) from explain_operator) * * * * You are also experiencing this problem if a local predicate * * is applied to an operator that does not contain the columns * * associated with that predicate. * **************************************************************** * RECOMMENDATION: * * Update the server to DB2 for Linux, Unix, Windows, Version * * 9.5 Fixpack 7. * **************************************************************** | |
Local Fix: | |
available fix packs: | |
DB2 Version 9.5 Fix Pack 9 for Linux, UNIX, and Windows | |
Solution | |
Update the server to DB2 for Linux, Unix, Windows, Version 9.5 Fixpack 7. Once upgraded the predicate(s) show be associated with the SHIP operator that would have applied the predicate on the remote system. | |
Workaround | |
not known / see Local fix | |
BUG-Tracking | |
forerunner : APAR is sysrouted TO one or more of the following: IC72120 IC72121 follow-up : | |
Timestamps | |
Date - problem reported : Date - problem closed : Date - last modified : | 20.10.2010 12.03.2012 12.03.2012 |
Problem solved at the following versions (IBM BugInfos) | |
9.5., 9.5.FP7 | |
Problem solved according to the fixlist(s) of the following version(s) | |
9.5.0.9 |