1

皆様、トリガーに問題があります。

私はこれを行っていますか?今のところ、挿入に対してのみ機能します。私はかなり近いと思いますが、時間があれば助けてください。トリガーを使用して、すべての挿入、更新、および削除をテーブル customers_changelog に保存しようとしています。コードに問題があるため、顧客を削除または更新できません。新しい顧客を挿入することしかできません。私はこれに多くの時間を費やしてきましたが、これを機能させることができません! :)

create table customers (
customerid int identity primary key,
name varchar(100) not null,
address varchar(100)
)
go

create table customers_changelog (
customerid int,
name varchar(100) not null,
address varchar(100),
change_user varchar(32),
change_time datetime,
change_action char(1) default 'I',
check (change_action = 'I' or change_action = 'D')
)
go


CREATE TRIGGER log_changes
ON customers
AFTER INSERT, UPDATE, DELETE
AS 
BEGIN
    SET NOCOUNT ON;

--
-- Check if this is an INSERT, UPDATE or DELETE Action.
-- 
DECLARE @customerid1 as int;
DEClARE @name1 as varchar(32);
DECLARE @address1 as varchar(100);
DECLARE @change_action1 as char(1);
DECLARE @change_time1 as datetime;
DECLARE @change_user1 as varchar(32);

select  @customerid1 = c.customerid, @name1 = c.name, @address1 = c.address
from customers c, inserted i
where c.customerid = i.customerid 

SET @change_time1 = CURRENT_TIMESTAMP;
SET @change_user1 = CURRENT_USER;
INSERT INTO customers_changelog(customerid,name,address,change_action,change_time,change_user)
    VALUES(@customerid1,@name1,@address1,'I',@change_time1,@change_user1)
IF EXISTS(SELECT * FROM DELETED)
BEGIN    
            IF EXISTS(SELECT * FROM INSERTED) 
            INSERT INTO customers_changelog VALUES(@customerid1,@name1,@address1,'U',@change_time1,@change_user1)
            ELSE 
            INSERT INTO customers_changelog VALUES(@customerid1,@name1,@address1,'D',@change_time1,@change_user1)

END
ELSE 
    IF NOT EXISTS(SELECT * FROM INSERTED) RETURN;
END
4

1 に答える 1

0

構文から MS-SQL を想定 - ここでいくつかの問題
があります。
2.削除挿入に「挿入」データを使用できない

ALTER TRIGGER [dbo].[log_changes] ON [dbo].[customers] AFTER INSERT, UPDATE, DELETE AS 
BEGIN
    SET NOCOUNT ON;
    DECLARE @customerid1 as int;
    DEClARE @name1 as varchar(32);
    DECLARE @address1 as varchar(100);
    DECLARE @change_action1 as char(1);
    DECLARE @change_time1 as datetime;
    DECLARE @change_user1 as varchar(32);

    select  @customerid1 = c.customerid, @name1 = c.name, @address1 = c.address
    from customers c, inserted i
    where c.customerid = i.customerid 

    SET @change_time1 = CURRENT_TIMESTAMP;
    SET @change_user1 = CURRENT_USER;

    IF EXISTS(SELECT * FROM DELETED)
    BEGIN    
                IF EXISTS(SELECT * FROM INSERTED) 
                INSERT INTO customers_changelog(customerid,name,address,change_action,change_time,change_user) 
                    VALUES(@customerid1,@name1,@address1,'U',@change_time1,@change_user1)
                ELSE 
                BEGIN
                    select  @customerid1 = d.customerid, @name1 = d.name, @address1 = d.address
                        from deleted d
                    INSERT INTO customers_changelog(customerid,name,address,change_action,change_time,change_user) 
                        VALUES(@customerid1,@name1,@address1,'D',@change_time1,@change_user1)
                END

    END
    ELSE
    BEGIN
        IF NOT EXISTS(SELECT * FROM INSERTED) RETURN;
        INSERT INTO customers_changelog(customerid,name,address,change_action,change_time,change_user)
            VALUES(@customerid1,@name1,@address1,'I',@change_time1,@change_user1) 
    END
END
于 2012-10-30T18:52:22.390 に答える