IT33945: CRASH IN FOLDVIEWS() ... VIEWINFO() WITH UNION VIEW JOINED TO TABLE EXPRESSION

APAR status

• Closed as program error.

Error description

• A query joining a UNION view to a table expression would fail
  with an exception in the optimizer.
  
  It either would return error 874 (general optimizer exception,
  indicating exception got handled)
  or errors 959/172, indicating the session crashed but could be
  suspended
  or even "25582: Network connection is broken" if the whole
  server crashed.
  
  The assertion stack would contain the following up to the signal
  frame:
  
   viewinfo
   process_view_colltbl_expr
   processview
   foldviews
   sqoptim
  

Local fix

• The problem doesn't occur when view folding is turned off
  (onconfig IFX_FOLDVIEW 0).
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Users of Informix Server prior to 12.10.xC15 and 14.10.xC5.  *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to Informix Server 12.10.xC15 (when available) or    *
  * 14.10.xC5.                                                   *
  ****************************************************************
  

Problem conclusion

• Fixed in Informix Server 12.10.xC15 and 14.10.xC5.
  

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