postgreSQL中function返回结果集

发现pg的资料很少，去IOE的风估计要吹一段时间。pg会越来越流行。

1.返回record

CREATE OR REPLACE FUNCTION "public"."select_rs_record"(stat_end_time varchar)
  RETURNS SETOF "pg_catalog"."record" AS $BODY$DECLARE 
	select_result record;
BEGIN
--时间处理

--遍历返回数据
	for select_result in 
		SELECT
			T .stat_time,
			T .field2
		FROM
			test T
		WHERE
			stat_time >= stat_end_time 
		AND stat_time < stat_end_time 
		AND time_type = '1'
  loop
   return next select_result;
  end loop;
 RETURN  ; 
END 


$BODY$
  LANGUAGE 'plpgsql' VOLATILE COST 100
 ROWS 1000
;

查看 数据：

select stat_time,field2 from select_rs_record('2015-07-07')   AS MEMBER (
		stat_time VARCHAR (64),
		field2 VARCHAR (64)
	);

2.直接返回Table

CREATE OR REPLACE FUNCTION "public"."select_rs_table"(stat_end_time varchar)
  RETURNS TABLE(
		stat_time VARCHAR (64),
		field2 VARCHAR (64)
	)  AS $BODY$DECLARE 

BEGIN
--时间处理

--遍历返回数据
	RETURN  QUERY
		SELECT
			T .stat_time,
			T .field2
		FROM
			test T
		WHERE
			stat_time >= stat_end_time 
		AND stat_time < stat_end_time 
		AND time_type = '1';

END 


$BODY$
  LANGUAGE 'plpgsql' VOLATILE COST 100
 ROWS 1000
;

查看数据：

select stat_time,field2 from select_rs_table('2015-07-07');