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POSQL Server 2008 Problem with SCOPE_IDENTITY()
 

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  1. POSQL Server 2008 Problem with SCOPE_IDENTITY()
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    <p>My code does not update the thread field. It is null. Anyone have any ideas?</p> <pre><code>INSERT INTO [Messages]([Sender], [Receiver], [Job_Number], [Subject], [MessageText], [DateSent]) VALUES(@Sender, @Receiver, @Job_Number, @Subject, @MessageText, @DateSent) SET @ThreadID = SCOPE_IDENTITY() UPDATE [Messages] SET Thread = @ThreadID WHERE MessageID = @ThreadID </code></pre> <p><strong>EDIT:</strong> It seems the UPDATE routine isn't being executed at all. I even added the following code to the end of the sproc, but nothing gets updated.</p> <pre><code>UPDATE Comments SET SomeField = @ThreadID where SCID = 33 </code></pre> <p><strong>EDIT:</strong> </p> <pre><code>/****** Object: Table [dbo].[Messages] Script Date: 04/09/2010 12:08:55 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO SET ANSI_PADDING ON GO CREATE TABLE [dbo].[Messages]( [MessageID] [int] IDENTITY(1,1) NOT NULL, [Sender] [varchar](30) NOT NULL, [Receiver] [varchar](30) NOT NULL, [Job_Number] [varchar](20) NULL, [Subject] [varchar](200) NULL, [MessageText] [varchar](max) NULL, [DateSent] [datetime] NULL, [Thread] [int] NULL, CONSTRAINT [PK_Messages] PRIMARY KEY CLUSTERED ( [MessageID] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] GO SET ANSI_PADDING OFF GO ALTER TABLE [dbo].[Messages] ADD CONSTRAINT [DF_Messages_DateSent] DEFAULT (getdate()) FOR [DateSent] GO </code></pre> <p><strong>EDIT:</strong> When I execute the stored procedure from Management Studio, the update works just fine. The problem is in my app when I call it using SQLHelper: </p> <pre><code>SqlHelper.ExecuteNonQuery(ConfigurationManager.ConnectionStrings["Conn"].ConnectionString, "spMessagesInsert", 0, message.Sender, message.Receiver, message.Job_Number, message.Subject, message.MessageText, message.DateSent ); </code></pre> <p><strong>EDIT:</strong> Ultimately, I changed the program code to call the stored procedure using Linq-to-sql instead of using SqlHelper. This seemed to fix the issue. </p>
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    1. COAre you sure there is an identity column specified on the Messages table?
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    2. COYes definitely.
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    3. COThen are you sure the INSERT is succeeding? You may want to check for errors or check `@@ROWCOUNT` to see if it's actually inserting anything that would update `SCOPE_IDENTITY`
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