在PostgreSQL中创建触发器 -

Question

我在PostgreSQL中创建此触发器时遇到错误

DROP TRIGGER IF EXISTS districts_bdt ON districts CASCADE; 

CREATE OR REPLACE FUNCTION trigger_fct_districts_bdt() 
  RETURNS trigger 
AS $BODY$
BEGIN
  DELETE GROUPS WHERE ID = OLD.UF_GROUP_ID;RETURN OLD;
END$BODY$ 
LANGUAGE'plpgsql' SECURITY DEFINER;
-- REVOKE ALL ON FUNCTION trigger_fct_districts_bdt() FROM PUBLIC;

CREATE TRIGGER districts_bdt
    BEFORE DELETE ON districts FOR EACH ROW
    EXECUTE PROCEDURE trigger_fct_districts_bdt();

这是我的错误

ERROR:  syntax error at or near "GROUPS"
LINE 4:     DELETE GROUPS WHERE ID = OLD.UF_GROUP_ID;

Answer 1

它应该是＆＃34;从群组中删除......＆＃34;而不是＆＃34; DELETE GROUPS ...＆＃34;在第4行。