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IT02024: ACCESS PLANS CONTAINING INDEX ORING BETWEEN MDC AND NON MDC INDEX MAY NOT FETCH ALL ROWS FROM SECOND EXECUTION ONWARDS

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APAR status

  • Closed as fixed if next.

Error description

  • The problem might occur for access plans containing index ORing
    between two different indexes on the same MDC table, when one
    index is a regular index and the other index is a block index.
    
    The first open, fetch, and close operation on a statement with
    such an access plan is working correctly and returns all
    applying rows. All further open, fetch, and close operations on
    the same statement may fail to return all applying rows.
    
    An example of a vulnerable access plan:
    
                                 FETCH
                                 (   4)
                                 37.6199
                                 5.72592
                               /---+----\
                           386.443       1247
                           RIDSCN   TABLE: DB2V977
                           (   5)         T1
                           15.6706        Q1
                              2
           +----------------++-----------------+
         62.7736          415.667               1
         SORT             SORT               SORT
         (   6)           (   8)             (  10)
         7.62301          7.97268           0.0758158
            1                1                  0
           |                |                  |
         62.7736          415.667               1
         IXSCAN           IXSCAN             IXSCAN
         (   7)           (   9)             (  11)
         7.61205          7.85609           0.0749869
            1                1                  0
           |                |                  |
          1247             1247               1247
     INDEX: DB2V977   INDEX: DB2V977     INDEX: SYSIBM
           I1               I1         MDC / BLOCK INDEX
           Q1               Q1                 Q1
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * ALL.                                                         *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * See Error Description                                        *
    ****************************************************************
    * RECOMMENDATION:                                              *
    * See SYSROUTE APARs to see where this APAR is addressed       *
    ****************************************************************
    

Problem conclusion

Temporary fix

Comments

APAR Information

  • APAR number

    IT02024

  • Reported component name

    DB2 FOR LUW

  • Reported component ID

    DB2FORLUW

  • Reported release

    950

  • Status

    CLOSED FIN

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2014-05-26

  • Closed date

    2017-05-08

  • Last modified date

    2017-05-08

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

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

    IT02045 IT02046 IT02047

Fix information

Applicable component levels

  • R950 PSN

       UP

[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSEPGG","label":"Db2 for Linux, UNIX and Windows"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"9.5","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
08 May 2017