JR44555: Bad performace when using Sybase nickname with BIGINT column predicates

DB2 Version 9.7 Fix Pack 8 for Linux, UNIX, and Windows

APAR status

• Closed as program error.

Error description

• The logical and mathematical expression with BIGINT can't be
  pushed down by Sybase wrapper.
  E.g. Here testnick is Sybase nickname,  c1 is BIGINT type:
  update  testnick set c2='aa' where c1=1003898714
  

Local fix

• alter nickname <your_nickname> alter column <bigint_column>
  local type DECIMAL(19, 0)
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Bad performace when using Sybase nickname with BIGINT column *
  * predicates                                                   *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * The logical and mathematical expression with BIGINT can't be *
  * pushed down by Sybase wrapper.                               *
  * E.g. Here testnick is Sybase nickname,  c1 is BIGINT type:   *
  * update  testnick set c2='aa' where c1=1003898714             *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to DB2 V9.7 fixpck 8.                                *
  ****************************************************************
  

Problem conclusion

• The performance issue has been fixed in DB2 V9.7 fix pack 8. The
  BIGINT column predicate run normally in Sybase nickname.
  

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:

  IC87539 IC89715

Fix information

• Fixed component name

  SYBASE WRAPPER

• Fixed component ID

  5724N9711

Applicable component levels

• R970 PSN

     UP

• R970 PSY

     UP