IT28014: WRONG RESULT IS POSSIBLE IF QUERY OPTIMIZATION IS SET TO 0 AND QUERY HAS "ALL"

Db2 Version 11.1 Mod 4 Fix Pack 5 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows
Db2 Version 11.1 Mod 4 Fix Pack 6 for Linux, UNIX, and Windows

APAR status

• Closed as program error.

Error description

• WRONG RESULT IS POSSIBLE IF QUERY OPTIMIZATION LEVEL IS SET TO 0
  AND QUERY HAS "ALL" .
  example:
  select c1 from t1 where 1 = all (select 1 from t2 where t1.c1 =
  t2.c1);
  we could lose rows depending on data in t1 and t2.
  

Local fix

• Do not use QUERY OPTIMIZATION level 0.
  

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