Finds the occurrences that match the query expression specified by
    QUERY_CONTEXT.

    Format

      SCA$QUERY_FIND  query_context

1  –  Argument

 query_context
    type:       $SCA_QUERY_CONTEXT
    access:     read/write
    mechanism:  by reference

    An SCA query context that describes a query expression to be
    evaluated.

2  –  Condition Values Returned

    SCA$_NORMAL           The query expression has been successfully
                          evaluated.

    SCA$_NOOCCUR          No occurrences match the query expression.

    SCA$_RESULTEXISTS     The query already has a result prior to this
                          call.

3  –  Description

    The SCA$QUERY_FIND routine finds the occurrences that match the
    query expression specified by QUERY_CONTEXT.

    This routine will become obsolete in a future version of SCA.