IT42883: LBAC: ANSI JOIN WITH A TRIM ON BOTH SIDES ON THE ON CLAUSE EXECUTED AS HASH RETURN UNEXPECTED RESULTSETS

APAR status

• Closed as program error.

Error description

• When a ANSI JOIN in a query used a trim on both sides on the ON
  clause
  and one of the tables uses LBAC and for the join a hash is used
  e.g in the following query
  
  select t1.col1
  
  from tab1 t1
  left  join tab2 t2 on  tab1.col1 = t2.col1  and t2.col2 = 'KUN'
  left join tab3 t3 on
  -- problematic
  TRIM(t1.col3)=TRIM(t3.col3)
  -- fine
  --t1.col3=t3.col3
  where t1.col1 IN (710896876 )
  
  the result set may vary.
  
  
  col1
     710896876
  1 row(s) retrieved.
  
  or
  
  col1
  No rows found.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Users of Informix Server prior to 12.10.xC16 and 14.10.xC10. *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to Informix Server 12.10.xC16 or 14.10.xC10.         *
  ****************************************************************
  

Problem conclusion

• Fixed in Informix Server 12.10.xC16 and 14.10.xC10.
  

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