Description

   The SCA$QUERY_SELECT_OCCURRENCE routine creates a query expression
   that matches a specific entity.

   You use this routine to specify queries based on the results
   of previous queries. The entity_handle parameter is obtained by
   traversing the results of a previous query evaluation.

   Typically, the query context of the entity_handle parameter is
   not the same as the query_context parameter. However, they can be
   the same. If they are the same query context, then that previous
   query is replaced with the query defined by this routine and, as a
   result, entity_handle becomes invalid.

   This routine will become obsolete in a future version of SCA. The
   SCA$SELECT_OCCURRENCE routine supersedes this routine.