CREATE OR REPLACE FUNCTION public.test(
	p_key 	VARCHAR(128)[] DEFAULT NULL, 
	p_key_op VARCHAR(10) DEFAULT NULL)
RETURNS SETOF storage
 LANGUAGE plpgsql
 AS $function$ 
BEGIN	
	EXECUTE 'SELECT * from storage 
	               WHERE key IN (select vl from unnest($1) as vl);'
        USING p_key;	
END;
$function$
;

CREATE OR REPLACE FUNCTION public.test(
	p_key 	VARCHAR(128)[] DEFAULT NULL, 
	p_key_op VARCHAR(10) DEFAULT NULL)
RETURNS SETOF storage
 LANGUAGE plpgsql
 AS $function$ 
BEGIN	
        return query
	EXECUTE 'SELECT * from storage 
	               WHERE key IN (select vl from unnest($1) as vl);'
        USING p_key;	
END;
$function$
;