camsom/gist:460fa9d6ab0f79f6d858

## gistfile1.sql
SELECT * FROM date_table WHERE rankscore();

CREATE FUNCTION rank_score() RETURNS decimal as $$
     BEGIN
          return date_table.birthday + interval '50 days'
     END; $$
	SELECT * FROM date_table WHERE rankscore();

	CREATE FUNCTION rank_score() RETURNS decimal as $$
	BEGIN
	return date_table.birthday + interval '50 days'
	END; $$