PH13283: LOOP IN DSNXOCCX FOR QUERY WITH OVER 32K PREDICATES

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• loop in DSNXOCCX offset1D70 offset1DF8 during bind/prepare of a
  query with over 32K predicates. The problem can occur in V11 or
  V12 but depends on what happens to be in storage at the
  location pointed to by the overflowed variable.
  Additional Keywords:
  ZSA2
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All Db2 11 and Db2 12 for z/OS users who     *
  *                 have a query containing over 32K predicates  *
  ****************************************************************
  * PROBLEM DESCRIPTION: An infinite loop can occur in DSNXOCCX, *
  *                      DSNXOGP, or other modules during        *
  *                      bind/prepare of a query containing      *
  *                      over 32K predicates                     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  An endless loop can occur in DSNXOCCX during bind or prepare of
  a query containing over 32K predicates.  A variable overflowed
  causing the loop to run endlessly.  Depending on the storage
  that happens to be located where the overflowed variable is
  pointing, the loop may require bringing down Db2 in order to
  terminate the thread.  This bug can also cause looping in
  DSNXOGP or other modules.
  
  Additional Keywords:
  LOOP DSNXOCCX INFINITE ENDLESS SQLLOOP
  LOOP DSNXOGP ZSA2
  

Problem conclusion

• The overflowed variable is updated to allow for over 32K
  predicates.
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

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

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

  UI63942 UI63943

Modules/Macros

•    DSNXOCCX
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RB10 PSY UI63943

     UP19/07/14 P F907 Ž

• RC10 PSY UI63942

     UP19/07/14 P F907 Ž

Fix is available

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