IT09099: WRONG RESULTS FOR SQL ANSI JOIN QUERY POSSIBLE WHEN IFX_FOLDVIEW IS ACTIVE

APAR status

• Closed as program error.

Error description

• You may observe wrong results when IFX_FOLDVIEW is active (set
  to 1 in the onconfig file).
  
  In the reported situation we have a CASE expression within the
  view that is being referenced in the SELECT statement.
  
  Depending on the query path chosen then an excess row was
  observed which does not match the filter.
  
  The SELECT statement is using ANSI JOIN and has predicate
  filters.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Users of 12.10.xC1 through 12.10.xC5.                        *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * A query may return incorrect results under the following     *
  * conditions:                                                  *
  *   - a view containing multiple tables, joined together with  *
  * ANSI INNER JOIN or Informix inner join                       *
  *   - a query with ANSI OUTER JOIN where the view is used as   *
  * dominant table, and one other table as subservient table     *
  *   - the view definition has an OR-clause predicate which     *
  * references more than 2 tables                                *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Update to IBM Informix Server 12.10.xC6                      *
  ****************************************************************
  

Problem conclusion

• Problem Fixed In IBM Informix Server 12.10.xC6
  

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

  INFORMIX SERVER

• Fixed component ID

  5725A3900

Applicable component levels

• RB70 PSN

     UP

• RC10 PSN

     UP