ERROR: syntax error at or near "RETURN" , PostgreSQL function

Question

我正在尝试编写一个函数，通过添加人员 ID returns 来自我 table 的 json 数据。我正在为此使用 pgAdmin 4。

CREATE FUNCTION public.getuserinfo(IN userid bigint DEFAULT 00000, OUT uinfo json)
RETURNS SETOF json
LANGUAGE 'sql'
VOLATILE 
AS $BODY$
SELECT info into uinfo FROM public.users Where uid=userid;
RETURN uinfo;
$BODY$;
ALTER FUNCTION public.getuserinfo(bigint)
 OWNER TO sun;
GRANT EXECUTE ON FUNCTION public.getuserinfo(bigint) TO sun 
WITH GRANT OPTION;
REVOKE ALL ON FUNCTION public.getuserinfo(bigint) FROM 
PUBLIC;
COMMENT ON FUNCTION public.getuserinfo(bigint)
  IS 'gets user info by id';

但是我收到了这个错误。error image 我搜索了教程和另一个以前的 post this 但没有得到帮助。提前致谢。

Answer 1

你并没有告诉函数有一系列的事情，所以它只希望有一个语句，而有两个。使用 BEGIN 和 END:

CREATE FUNCTION public.getuserinfo(IN userid bigint DEFAULT 00000, OUT uinfo json)
RETURNS SETOF json
VOLATILE 
AS $BODY$
BEGIN
  SELECT info into uinfo FROM public.users Where uid=userid;
  RETURN uinfo;
END;
$BODY$ LANGUAGE plpgsql;

而且语言可能应该是 PL/PGSQL

ERROR: syntax error at or near "RETURN" , PostgreSQL function

ERROR: syntax error at or near "RETURN" , PostgreSQL function

postgresql

sql-function

sql-returning