A fix is available
APAR status
Closed as program error.
Error description
An incorrect filter factor can be produced for a predicate containing a CURRENT DATE/CURRENT TIMESTAMP special register and the query contains host variables and/or parameter markers. Additional symptoms and keywords: SQLPERFORMANCE SQLDATE SQLTIMESTAMP
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: * * All Db2 12 for z/OS users who experience * * an inefficient access path as a result of * * an incorrect filter factor being calculated * * for an EQUAL, RANGE or BETWEEN * * predicate containing CURRENT DATE, CURRENT * * TIMESTAMP. * **************************************************************** * PROBLEM DESCRIPTION: * * An inefficient access path can result * * from an incorrect filter factor being * * calculated for an EQUAL, RANGE, or * * BETWEEN predicate containing CURRENT * * DATE or CURRENT TIMESTAMP. * **************************************************************** * RECOMMENDATION: * * Apply corrective PTF when available * **************************************************************** The incorrect filter factor is produced by an invalid value returned internally when the calculation is done for the CURRENT DATA or CURRENT TIMESTAMP special registers. Db2 will now avoid using the incorrect values for the calculation. Additonal keywords: SQLACCESSPATH FILTERFACTOR SQLSPECIALREG
Problem conclusion
The described problem is fixed by correcting the bad filterfactor on such predicates.
Temporary fix
Comments
APAR Information
APAR number
PI96768
Reported component name
DB2 OS/390 & Z/
Reported component ID
5740XYR00
Reported release
C10
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2018-04-17
Closed date
2018-05-29
Last modified date
2018-07-02
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UI56157
Modules/Macros
DSNXODFE DSNXODFB DSNXODFR DSNXORSP
Fix information
Fixed component name
DB2 OS/390 & Z/
Fixed component ID
5740XYR00
Applicable component levels
RC10 PSY UI56157
UP18/06/13 P F806
Fix is available
Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.
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Document Information
Modified date:
02 July 2018