PM42749: INCORROUT WHEN COMPARING BINARY STRINGS

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Incorrout may happen when query is comparing binary strings.
  DB2INCORR/K
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All DB2 9 for z/OS and DB2 10 for z/OS       *
  *                 users who use BINARY and VARBINARY data      *
  *                 types.                                       *
  ****************************************************************
  * PROBLEM DESCRIPTION: Incorrect output may occur for an SQL   *
  *                      statement that contains a predicate     *
  *                      comparing a BINARY value with a         *
  *                      VARBINARY value.                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Incorrect output may occur for an SQL statement that contains
  a predicate comparing a BINARY value with a VARBINARY value.
  For example,
  CREATE TABLE MYTAB1 (COL1 BINARY(5)) ;
  CREATE TABLE MYTAB2 (COL1 VARBINARY(5)) ;
  INSERT INTO MYTAB1 VALUES (BINARY('ABC'));
  INSERT INTO MYTAB2 VALUES (VARBINARY('ABC'));
  SELECT HEX(MYTAB1.COL1)
  FROM   MYTAB1,
         MYTAB2
  WHERE  MYTAB2.COL1 = MYTAB1.COL1;
  
  Two binary strings are equal only if the lengths of the two
  strings are identical. If the strings are equal up to the length
  of the shorter string, the shorter string is considered
  less than the longer string even when the remaining bytes in the
  longer string are hexadecimal zeros.
  
  In the SELECT statement above, one record 'C1C2C30000' is
  returned when no record is expected(RNF). This problem happens
  because DB2 doesn't handle the data types correctly when
  comparing the two values.
  

Problem conclusion

• DB2 code is fixed to handle the data types correctly when
  comparing BINARY with VARBINARY values.
  
  Additional Keywords: SQLINCORR SQLINCORROUT INCORROUT
                       DB2INCORR/K
  

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:

  UK70654 UK70655

Modules/Macros

• DSNXGLIB DSNXGOJ  DSNXGTRF DSNXGVCM
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RA10 PSY UK70654

     UP11/08/26 P F108

• R910 PSY UK70655

     UP11/08/26 P F108

Fix is available

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