IBM Support

IT31145: CDE HSJN NOT PICKED UP FOR NON EQUAL PREDICATES(RANGE AND OR PREDICATES)

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APAR status

  • Closed as program error.

Error description

  • Db2 query may show poor performance for queries having CDE
    tables since HASH join is not picked up for joins having OR
    predicate or range predicate and there is no equality predicate.
    

Local fix

  • Add dummy equality predicate to the query:
    nvl(mod(length(t1.col1),1),0) = nvl(mod(length(t2.col1),1),0)
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    IT31145

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    B10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2019-12-03

  • Closed date

    2021-03-15

  • Last modified date

    2021-03-15

  • APAR is sysrouted FROM one or more of the following:

    IT31140

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    DB2 FOR LUW

  • Fixed component ID

    DB2FORLUW

Applicable component levels

[{"Line of Business":{"code":"LOB10","label":"Data and AI"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEPGG","label":"Db2 for Linux, UNIX and Windows"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"11.1"}]

Document Information

Modified date:
16 March 2021