Page format for system relations being changed to UNIFORM

  Explanation:  The storage area that contain the system relations
  must have UNIFORM page formats.  Either through the use of the
  defaults, or by directly specifing PAGE FORMAT IS MIXED, SQL has
  been told to use MIXED page format for the area containing the
  system relations.  SQL is overriding that to UNIFORM pages.

  User Action:  None.  This is an informational message.  The user
  might want to change the command if it originated in a command
  file.  This may avoid confusion later.