pgsql function 샘플

 

pgsql function 샘플

CREATE OR REPLACE FUNCTION public.fn_days_ago(today varchar,ago numeric)
 RETURNS varchar
 LANGUAGE plpgsql
 STABLE PARALLEL SAFE
AS 
$function$ 
BEGIN
	IF ago = 0 THEN 
		RETURN today;
	ELSE 
	    RETURN  min(stock_date) AS stock_date FROM (
	    SELECT stock_date
	    FROM stock_day_chart sdc
	    WHERE stock_cd ='000660'
	    AND stock_date < today ORDER BY stock_date DESC LIMIT ago
	    ) a;
	END IF;
END; 
$function$
;