IT28831: UPDATE STATEMENT WITH CORRELATED SCALAR SUBQUERY FAILS WITH SQLCODE -407

APAR status

• Closed as program error.

Error description

• Starting with Db2 v11.1.4.4, an UPDATE statement that includes a
  correlated scalar subquery may incorrectly return SQLCODE -407,
  SQLSTATE 23502 at run time if the scalar subquery returns a NULL
  result.
  
  This may happen even if the assignment of the NULL value is
  protected with - for example - COALESCE:
  
      update T set NotNullableColumn = coalesce((select tabname
  from syscat.tables where tabname = T.COL1), T.COL2)
  

Local fix

• db2set DB2COMPOPT=NO_UPDATE_COMP
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * ALL                                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to Db2 11.1 Mod 4 Fixpack 5 or higher                *
  ****************************************************************
  

Problem conclusion

• First fixed in Db2 11.1 Mod 4 Fixpack 5
  

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:

Fix information

• Fixed component name

  DB2 FOR LUW

• Fixed component ID

  DB2FORLUW

Applicable component levels

• RB10 PSN

     UP