A fix is available
APAR status
Closed as program error.
Error description
ABEND0C4 RC38 at DSNXOSJO OFFSET3DB8 on query with left joins and Star schema processing(STARJOIN subsystem parameter) is enabled.
Local fix
Disable STARJOIN
Problem summary
**************************************************************** * USERS AFFECTED: * * All Db2 12 for z/OS users who run * * queries with left outer join and with * * STARJOIN subsystem parameter turned * * on. * **************************************************************** * PROBLEM DESCRIPTION: * * ABEND0C4 RC38 at DSNXOSJO OFFSET3DB8 * * can occur on queries with LEFT JOIN * * and with star schema processing * * (STARJOIN subsystem parameter) turned * * on. * **************************************************************** * RECOMMENDATION: * * Apply corrective PTF when available * **************************************************************** ABEND0C4 RC38 at DSNXOSJO OFFSET3DB8 can occur on queries when the following conditions are met. (1) the STARJOIN subsystem parameter is turned on (2) A set of tables join to one dimension table, which joins to the fact table. (3) Within the set of tables in (1), there exists LEFT JOIN (4) Within the set of LEFT JOIN tables in (3), there exists no sargable JOIN predicates When the conditions above are met, ABEND0C4 RC38 at DSNXOSJO OFFSET3DB8 can occur because Db2 may fail to generate an access plan.
Problem conclusion
PH14404 fixes the abend by generating a cartesian join access plan among the tables described above. LEFTJOIN LOJ SQLLEFT SQLOUTER SQLSTARJOIN
Temporary fix
Comments
APAR Information
APAR number
PH14404
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
2019-07-12
Closed date
2019-10-15
Last modified date
2019-11-01
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
010PC2 UI65904 010PC2
Modules/Macros
DSNXOTS DSNXOSJO
Fix information
Fixed component name
DB2 OS/390 & Z/
Fixed component ID
5740XYR00
Applicable component levels
RC10 PSY UI65904
UP19/10/24 P F910
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:
01 November 2019