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Trigger to prohibit to update AddDate Field
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Email
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| Submitted on: |
2/20/2005 8:25:18 PM |
| By: |
Jairo Abraham Bernal Villanueva
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| Level: |
Advanced |
| User Rating: |
Unrated |
| Compatibility: |
SQL Server 2000 |
| Views: |
8256 |
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(About the author) |
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In order to prohibit this, we can create a instead of trigger in the table. Tis code works fine with multiple updated rows in SQL Server 2000. Thus:
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CREATE TRIGGER trig_updTableName
ON dbo.tblName
INSTEAD OF UPDATE
AS
-- We declare the needed vars
DECLARE @OldAddDate[datetime],
@NewAddDate [datetime],
@IDTable [int]
DECLARE update_cursor CURSOR FORWARD_ONLY READ_ONLY
FOR
SELECT I.IDTable, I.AddDate, D.AddDate
FROM Inserted AS I, Deleted AS D
WHERE I.IDTable = D.IDTable
OPEN update_cursor
FETCH NEXT FROM update_cursor
INTO @IDTable, @NewAddDate, @OldAddDate
WHILE @@FETCH_STATUS = 0
BEGIN
IF @OldAddDate != @NewAddDate
BEGIN
ROLLBACK TRANSACTION
BEGIN TRANSACTION
END
FETCH NEXT FROM update_cursor
INTO @IDTable, @NewAddDate, @OldAddDate
END
CLOSE update_cursor
DEALLOCATE update_cursor
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Other User Comments
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 2/21/2005 11:14:17 AM:
I'm new at this so it would be great if you could elaborate the logic of this trigger. Thanks again.
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11/3/2007 4:30:29 AM: Prasad
Can you please eloborate what exactly this does .. in steps .. looks confusing .. sorry .....
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