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DB2 - Problem description

Problem IT02722 Status: Closed

INVALID FILTER FACTOR ESTIMATION FOR RANGE PREDICATE

product:
DB2 FOR LUW / DB2FORLUW / A10 - DB2
Problem description:
Under rare circumstances DB2 optimizer may calculate invalid 
Filter Factor for range predicate(s). 
The invalid Filter Factor for the range predicate will be 
noticed in a query plan explain output (db2exfmt) as following: 
 
  Filter Factor:             -1.#IND 
 
Following are the conditions to hit this issue: 
 
- DB2 LUW running on Windows platform 
- string column (char or varchar) 
- quantile distribution statistics have been collected on the 
column 
- range predicate on the column
Problem Summary:
**************************************************************** 
* USERS AFFECTED:                                              * 
* All                                                          * 
**************************************************************** 
* PROBLEM DESCRIPTION:                                         * 
* See Error Description                                        * 
**************************************************************** 
* RECOMMENDATION:                                              * 
* Upgrade to DB2 V10.1 FixPack 5                               * 
****************************************************************
Local Fix:
Solution
First fixed in DB2 V10.1 FixPack 5
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
23.06.2014
16.07.2015
16.07.2015
Problem solved at the following versions (IBM BugInfos)
Problem solved according to the fixlist(s) of the following version(s)
10.1.0.5 FixList