postgresql - 错误 : unterminated dollar-quoted string at or near "$BODY$

Question

我正在使用 sql fiddle ...PostgreSQL 9.3:

CREATE TABLE HotelStays
(roomNum INTEGER NOT NULL,
arrDate DATE NOT NULL,
depDate DATE NOT NULL,
guestName CHAR(30) NOT NULL,
PRIMARY KEY (roomNum, arrDate))
;


CREATE OR REPLACE FUNCTION new_customer() RETURNS void AS
$BODY$
DECLARE
    depatureDate DATE;\
BEGIN
    SELECT depDate INTO depatureDate FROM HotelStays WHERE OLD.roomNum = NEW.roomNum;
    IF (depatureDate <= NEW,arrDate)
      INSERT INTO HotelStays (roomNum, arrDate, depDate, guestName)
    VALUES (:NEW.roomNum, :NEW.arrDate, :NEW.depDate, :NEW.guestName);
    END IF;
    RETURN;
END
$BODY$
LANGUAGE 'plpgsql' ;
CREATE TRIGGER;

INSERT INTO HotelStays(roomNum, arrDate, depDate, guestName)
VALUES 
(123, to_date('20160202', 'YYYYMMDD'), to_date('20160206','YYYYMMDD'), 'A');

我正在尝试解决的问题:即使在现有客人退房之前，也可以为房间号输入一个新条目(针对新客人)。我正在尝试使用触发器来解决这个问题。请帮帮我。提前致谢。

Answer 1

正如作者所提到的，他使用了 SQL Fiddle。我在 db-fiddle.com 上遇到了同样的问题，并通过将 $$ 或 $BODY$ 替换为单引号 ' (并加倍中间其他地方的单引号。

例如，db-fiddle

CREATE OR REPLACE FUNCTION update_datem()
  RETURNS trigger AS
'
BEGIN
 NEW.dateM = DATE_TRUNC(''MONTH'', NEW.date);
 RETURN NEW;
END;
'
LANGUAGE plpgsql;