IT26394: DB2 TAKES Z LOCK WHEN ATTACHING PARTITION TO TABLE

Db2 Version 11.1 Mod 4 Fix Pack 5 for Linux, UNIX, and Windows

APAR status

• Closed as program error.

Error description

• Command such as
  ALTER TABLE MYSCHEMA.TESTTABLE ATTACH PARTITION
  STARTING('2018-01-25') ENDING('2018-01-25') FROM
  MYSCHEMA.TESTTABLE1
  
  May result in.
  DB21034E The command was processed as an SQL statement because
  it was not a
  valid Command Line Processor command. During SQL processing it
  returned:
  SQL0911N The current transaction has been rolled back because of
  a deadlock
  or timeout. Reason code "68". SQLSTATE=40001
  
  This may due to a z lock that should not be acquired during the
  process. This can happen when a table has columns with default
  values that is being attached to the partition table with
  different default values. This triggers an ALTER TABLE under the
  covers that acquires the z-lock and conflicts with the lock held
  by the attach partition.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * all                                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * upgrade to version 11.1 M4FP5                                *
  ****************************************************************
  

Problem conclusion

• First fixed in version 11.1 M4FP5
  

Temporary fix

Comments

APAR Information

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

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

  IT30061

Fix information

• Fixed component name

  DB2 FOR LUW

• Fixed component ID

  DB2FORLUW

Applicable component levels

• RB10 PSY

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