and class = lookup_class and type = lookup_type and operator = op
INTO return_word_id;
IF return_word_id IS NULL THEN
return_word_id := nextval('seq_word');
and class = lookup_class and type = lookup_type and operator = op
INTO return_word_id;
IF return_word_id IS NULL THEN
return_word_id := nextval('seq_word');