IC85221: SQL WITH NESTED MATH OPERATIONS ON COLUMNS THAT ARE DEFINED WITH NOT NULL AND USING FUNCTIONS MAY RETURNED DIFFERENT RESULTS.

DB2 Version 10.1 Fix Pack 1 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 2 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 3 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 4 for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 3a for Linux, UNIX, and Windows
DB2 Version 10.1 Fix Pack 6 for Linux, UNIX, and Windows

APAR status

• Closed as program error.

Error description

• Incorrect results are possible when doing nested math operations
  on columns that are defined with NOT NULL and using functions.
  
  Example (pseudo-code):
  
  create function3(col1 bigint,col2 bigint)
  {
      return function1(col1)-function2(col2);
  }
  
  SELECT SUM(function3(column1,column2)) from table;
  <-- intermittent incorrect results are possible on databases
  with smaller non-automatic SORTHEAP.
  

Local fix

• select SUM(col1) - SUM(col2) from table
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * All users                                                    *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to DB2 version 10.1.0.1.                             *
  ****************************************************************
  

Problem conclusion

• The problem is first fixed in DB2 version 10.1.0.1.
  

Temporary fix

Comments

APAR Information

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

  IC83608

• 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

• RA10 PSN

     UP