PH70550: Using Db2ZAI SQL optimization exploration with validation might result in incorrectly executing user-defined functions.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• During the Db2ZAI SQL optimization exploration process that
  includes validation of the recommended access path, if the
  statement being explored invokes a user-defined function (UDF),
  then the validation process might incorrectly execute the UDF.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All Db2 AI for z/OS (Db2ZAI) users that      *
  *                 use the SQL optimization exploration         *
  *                 with validation feature.                     *
  ****************************************************************
  * PROBLEM DESCRIPTION: Unnecessary or incorrect invocation     *
  *                      of certain SQL processes during         *
  *                      Db2ZAI SQL optimization exploration     *
  *                      with valdation.                         *
  ****************************************************************
  * RECOMMENDATION: Apply corrective PTF when available          *
  ****************************************************************
  During the Db2ZAI SQL optimization exploration process that
  involves validation of the recommended access path, the
  validation process might perform processing which is
  incompatible with the validation process. For example, if
  the statement being explored involves a user defined
  function (UDF), the validation process might execute the UDF.
  
  Additional keywords: DB2AIV1R6/K
  

Problem conclusion

• The Db2ZAI SQL optimization exploration logic is modified to
  block validation when a statement being explored involves
  processing which is incompatible with validation processing.
  In these cases, the statement can only be explored without
  validation.
  

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:

  UO07248

Modules/Macros

• COYAKIRA COYREADM
  

Fix information

• Fixed component name

  DB2 AI FOR Z/OS

• Fixed component ID

  5698CGN00

Applicable component levels

• R160 PSY UO07248

     UP26/03/27 P F603 ¢

Fix is available

• Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.