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instead of trigger

Author

Topic

Sean_B
Posting Yak Master

111 Posts

Posted - 2007-01-11 : 11:23:01

Hi,
Can anyone help

I'm trying to use an instead of trigger to get a unique id from one table and insert it as a foregin key in another table, but the trigger won't work.

These are the tables
/****** Object: Table [dbo].[Instrument] Script Date: 01/11/2007 16:16:35 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[Instrument](
[InstrumentId] [int] IDENTITY(1,1) NOT NULL,
[InstrumentTypeId] [int] NOT NULL,
CONSTRAINT [PK_Instrument] PRIMARY KEY CLUSTERED
(
[InstrumentId] ASC
)WITH (PAD_INDEX = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]

GO
ALTER TABLE [dbo].[Instrument] WITH CHECK ADD CONSTRAINT [FK_Instrument_InstrumentType] FOREIGN KEY([InstrumentTypeId])
REFERENCES [dbo].[InstrumentType] ([InstrumentTypeId])
GO
ALTER TABLE [dbo].[Instrument] CHECK CONSTRAINT [FK_Instrument_InstrumentType]
GO
ALTER TABLE [dbo].[Instrument] WITH CHECK ADD CONSTRAINT [FK_Instrument_Test1] FOREIGN KEY([InstrumentId])
REFERENCES [dbo].[Test] ([instrumentId])
GO
ALTER TABLE [dbo].[Instrument] CHECK CONSTRAINT [FK_Instrument_Test1]
GO
/****** Object: Table [dbo].[Test] Script Date: 01/11/2007 16:16:57 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_PADDING ON
GO
CREATE TABLE [dbo].[Test](
[instrumentId] [int] NOT NULL,
[MyId] [int] IDENTITY(1,1) NOT NULL,
[MyValue] [varchar](50) COLLATE Latin1_General_CI_AS NOT NULL,
CONSTRAINT [PK_Table_1] PRIMARY KEY CLUSTERED
(
[MyId] ASC
)WITH (PAD_INDEX = OFF, IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]

GO
SET ANSI_PADDING OFF

-- this is the trigger
/****** Object: Trigger [dbo].[FutConInstrumentId] Script Date: 01/11/2007 16:18:14 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE trigger [dbo].[FutConInstrumentId]
on [dbo].[Test]
instead of insert
as
insert instrument
(
InstrumentTypeId
)
select instrumenttypeid from instrumenttype where instrumenttype.InstrumentName = 'FutCon'

insert Test
(
instrumentId,
MyValue
)
select @@IDENTITY, inserted.MyValue from inserted

I can't get this to work, I've tried it with a unique index instead of a foreign key and it'll let me insert one row, but fails when I try multiple inserts.

Can anyone tell me how to get this working please.
Thanks

___________________________________________________________

Sean

X002548
Not Just a Number

15586 Posts

Posted - 2007-01-11 : 11:26:08

why do you need a trigger for this?

Use Scope_identity in the sproc

Brett

8-)

Hint: Want your questions answered fast? Follow the direction in this link
http://weblogs.sqlteam.com/brettk/archive/2005/05/25/5276.aspx

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http://www.frappr.com/sqlteam

Sean_B
Posting Yak Master

111 Posts

Posted - 2007-01-11 : 11:46:53

Thanks Brett, I'll take a look at this.

I managed to get this trigger working, but it isn't a very elegant way of doing this.

Sean

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