PostgreSQL操作rowtype类型(赋值、插入)
发布时间:2020-12-13 17:18:02 所属栏目:百科 来源:网络整理
导读:CREATE OR REPLACE FUNCTION create_new_stu() RETURNS trigger AS$BODY$declareusrid int;student students%rowtype;beginusrid := NEW.id;select * from students where sno='111' into student;student.sname := 'zxh';if student.cno is NULL thenstuden
CREATE OR REPLACE FUNCTION create_new_stu() RETURNS trigger AS $BODY$ declare usrid int; student students%rowtype; begin usrid := NEW.id; select * from students where sno='111' into student; student.sname := 'zxh'; if student.cno is NULL then student.scid := 1; end if; insert into students select student.*; return NEW; end; $BODY$ LANGUAGE plpgsql VOLATILE COST 100; ALTER FUNCTION create_new_stu() OWNER TO postgres; rowtype类型的变量可以看作一个结构体,可以通过点访问符来获取或修改某个字段的值。将某个rowtype类型的变量值直接插入到某个结构相同的表中: insert into students select student.*; (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |