Trigger-assigned Value Changes When Row Replicates - Why?
Feb 14, 2008
Greetings,
We have a standard audit trigger on one of our tables. The trigger type is "after insert, update". The trigger populates four table columns, telling us the login and time the row was created and last updated.
We use replication to synchronize three servers. The trigger specifies "not for replication" on all servers.
The code used to grab the identity and time of the last update is shown below.
LastEditedDate = GETUTCDATE(),
LastEditedBy = SUSER_SNAME()
What I observe is that the LastEditedBy value is sometimes different for the same row on different servers even though the time value is identical. I don't know how to explain this. It looks like the login value is being recalculated during replication while the edit time is not.
For the record, the correct login will be something like "MYDOMjoe" while the incorrect value on another server will read "NT AUTHORITYNETWORK SERVICE". Do these symptoms ring a bell with anyone?
Thanks,
BCB
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Mar 29, 2007
There are times when we need to make DDL changes and have them NOT replicate to the subscription database. The documented approach is to disable DDL replication using sp_changepublication (replicate_ddl = 0). See http://msdn2.microsoft.com/en-us/ms147331.aspx
However, our DDL still replicates even when following those steps. I've even tried the very simple steps below to reproduce the error.
Set up transactional replication of one small test table. Replication is working fine.
Set @replicate_ddl = 0 with sp_changepublication. I manually verify the setting (using the GUI) before continuing.
Run a simple alter on the publication DB; change one column from varchar(25) to varchar(30). "ALTER TABLE <tablename> ALTER COLUMN <colname> VARCHAR(30) NULL".
The DDL still replicates. The subscription table still has the column altered to the new definition.
I've even tried manually setting the option in the GUI and also stopping and restarting the synchronization after changing the setting; nothing works.
We are using SQL Server 2005 and just upgraded to SP2 a few days ago.
I have not found any other articles/postings on the topic so it appears we are the only ones having this problem. If anyone has any advice or input, it is greatly appreciated.
Regards,
Adam
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Oct 12, 2007
I was asked this question due to performance issues..
If you update a 1 or two columns in table, what gets replicated?? Is it the whole row or just those columns that were updated??
I am trying to find this answer cause it will have an effect on the way we do some updates in the future.
Thanks...
also if you have any links to information about this that would be great.
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May 1, 2007
I have been messing around with trying to replicate sql server 2000 tables to postgres as well as mySQL. I'm starting with just one table and trying to get that working, it has around 9000 rows, all of which copy to postgres (with some datatype issues).
However, when I try to replicate to a mySQL database however, only the same 152 rows get copied every time.
I compared rows that were copied to ones that were not to see if there was any obvious differences between the two and couldn't find any.
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Dec 4, 2006
I previously asked What does "Do not replicate DELETE statements" do? to make sure I was correct on my thinking of what "Do not replicate DELETE statements" does. And after finding out it does what I would like it to do, create an archive db, I've tried several testing scenarios to see if it would work. So far I have been unable to not replicate delete statements. I'm not sure if I'm not setting a property right or what and any guidance would be appreciated.
Here is what I've done.
Created a blank db to be used as a subscriber and created a test db with some random data in a table.
Setup a New Publication on the db with the random data as "Transactional Publication"
Selected the following articles and properties in the publication
Tables
DELETE Delivery Format = Do not replicate DELETE statements
Views
Default Values
Stored Procedures
Default Values
User Functions
Default Values
Selected the default options for the rest of the New Publication Wizard steps and clicked finish.
Created a Pull Subscription on the new publication that I just created.
Let it initialize.
Then did a select count(*) query on the test table on the publication (18k+ rows) and subscriber (18k+ rows)
Then did a delete t-sql from the test table on the publication.
Then did a select count(*) query on the test table on the publication (0 rows) and subscriber (0 rows).
Now shouldn't it not delete the records on the subscription db?
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Apr 6, 2006
I am moving some code that was created in visual studio 2002 into Visual Web Developer 2005 express edition and am getting a warning on some of my code before compilation.
The warning is "Variable lSqlTransaction is used before it has been assigned a value. A null reference exception could result at runtime". I experienced no problems in vs2002.
The offending line is the rollback command within the exception. If I move it out of the exception it no longer flags the warning, if I move it after the throw statement it now longer flags the warning. Any help appreciated.
Heres the code
Public Shared Sub ExecuteNonQuery(ByVal lSQLCommand As SqlCommand)
Dim lSQLConnection As New SqlConnection(SQLConnString(enmSQLDB.enmSQLDB_TPSDB))
Dim lSQLTransaction As SqlTransaction
Try
'-----------------------------------------------------
'Try and open the database
'-----------------------------------------------------
lSQLConnection.Open()
'-----------------------------------------------------
'Create a transaction
'-----------------------------------------------------
lSQLTransaction = lSQLConnection.BeginTransaction
'-----------------------------------------------------
'Assign the connection and transaction to our object
'-----------------------------------------------------
lSQLCommand.Connection = lSQLConnection
lSQLCommand.Transaction = lSQLTransaction
'-----------------------------------------------------
'Execute the stored proc
'-----------------------------------------------------
lSQLCommand.ExecuteNonQuery()
'-----------------------------------------------------
'Use the transaction to commit the changes
'-----------------------------------------------------
lSQLTransaction.Commit()
Catch ex As Exception
'-----------------------------------------------------
'If any errors have been thrown then roll back without
'commiting....
'-----------------------------------------------------
lSQLTransaction.Rollback()
Throw New Exception("An error has occured whilst trying to update the database. " & _
"Your changes have not been saved.", ex)
Finally
If lSQLConnection.State = ConnectionState.Open Then
lSQLConnection.Close()
End If
End Try
End Sub
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Nov 20, 2007
I'm tryin to copy information from a fact table from one server to another server but when try using a DTS package to do this, an error pops up that says "the Filegroup <filegroup_name> has no files assigned to it."
what am i missing here?
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Apr 23, 2007
I have a problem with datatype mismatches. In my Data Flow I am reading a Flat File that includes a DateOfBirth which SSIS correctly assigns a datatype of [DT_DATE]. I need to check to see if the record has previously been submitted, so I do a Lookup that uses a SQL statement that combines fields (LastName, Zip & BirthDate) from three different tables. My problem is that SSIS assigns a datatype of [DT_DBTIMESTAMP] to BirthDate, which I can't use because of the mismatch. I have tried every form of re-formating the field in SQL that I can think of, but it still gets assigned that DT. And I'm unaware of a way of changing the DT once SSIS assigns it in the Lookup task.
Help!...very frustrated,
Dave
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Dec 18, 2006
I need to update a table using a stored procedure that "UPSERTS". In this case, @OfficeId is passed with ParameterDirection.OutputSo when I update I assign the value to OfficeId like this (the office id value is being correctly assigned): SqlParameter OfficeIdParam = new SqlParameter("@OfficeId", SqlDbType.Int, 4); if (_officeId > 0) { OfficeIdParam.Value = _officeId; } OfficeIdParam.Direction = ParameterDirection.Output; The following segment of the stored procedure is throwing an error that the OfficeId does not exist: Update --- @OfficeId int output if not exists (select 1 from ORG_Office where OfficeId=@OfficeId) begin RAISERROR ('OfficeId does not exist in ORG_Office: E002', 16, 1) -- OfficeId does not exist. return -1 end May this approach work, and if the operation turns out to be an Insert I may do this:select @error_code = @@ERROR, @OfficeId= scope_identity() Thank you,jspurlin
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Apr 6, 2006
Hello,
Is there a way to assign multiple variables to one select statement as in the following example?
DECLARE @FirstName VARCHAR(100)
DECLARE @MiddleName VARCHAR(100)
DECLARE @LastName VARCHAR(100)
@FirstName, @MiddleName, @LastName = SELECT FirstName, MiddleName, LastName FROM USERS WHERE username='UniqueUserName'
I don't like having to use one select statement for each variable I need to pull from a query. This is in reference to a stored procedure.
Thank you!
Cody
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Jan 10, 2007
I have a report where certain columns have values that get repeated, but the client has a rigid requirement for not wanting these columns as groups in the reports (other programs and exports doing specific tasks with those values). In these reports, the "hide duplicates" value is checked, so as to give an aesthetic sense of grouping.
The data for the report, in raw form is:
Value 1
A
Value 1
B
Value 1
C
Value 2
D
Value 2
E
Value 2
F
Value 3
G
Value 3
Hetc...
In its aesthetic form, it is:
Value 1
A
B
C
Value 2
D
E
F
Value 3
G
H
My question is, how can I use RunningValue() to give me the following row numbers based upon those repeated values acting as grouping, since I'm not using formal grouping in the report design?
Value 1
1
A
2
B
3
C
Value 2
1
D
2
E
3
F
Value 3
1
G
2
H
Thanks for any input!
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Aug 21, 2007
Hello all,
This seems like a simple question but I still haven't been able to get an answer from Microsoft Canada. We're looking at buying 75 device cals to connect to a single instance of SQL Server Standard Edition. Our question is on how those licenses are assigned and/or activated.
Do we need to manually do something for each station or is it an automated process done the first time a station connects to the server? We also wat to understand what happens when a workstation dies and is replaced by another one. Do you have to do something on the server to transfer the license to the new station ?
In other words, when using device cals (and/or user cals), do you have to do any type of license management or is it all transparent ?
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Aug 28, 2007
At our site, we page DBAs whenever an alert with a severity of 20 or greater is raised. This never was an issue until SQL Server 2005. Now every SSPI error is paged since it is a severity 20. I don't believe the errors are severe enough to qualify an assignment of 20. Anybody else have any thoughts on this?
Thanks.
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Nov 9, 2005
Hi,
In SQL Server Express Edition, what are the rights that are assigned to a Normal Windows User and PowerUser by default ?
When I install SQL Express on a clean machine and login as Power User I can add/edit/delete data but when I login as Normal Windows User I can see the data but not change it.
Please help me in this regard.
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Oct 10, 2007
We have SELECT INTO queries that use the IDENTITY function to assign a sequential row number to a result set based upon a sort order. This has been helpful in SQL Server 2000 for median determination. It appears, however, that in SQL Server 2005, the row numbers are not assigned sequentially, or maybe they are assigned before the sort order is applied.
Can anyone verify whether the IDENTITY function has changed behavior between 2000 and 2005? We would prefer not to have to make changes to existing queries. Thank you.
(BTW, the workaround we found so far is to put the initial SELECT...ORDER BY in a subquery, but then we had to include a phrase like TOP 10000000 to pass syntax check. Is there a better way?)
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Jun 19, 2008
I restored a sql server database today. There is a problem though. In SQL server, right next to the name of the database are the words "Restricted User". Their seem to be some limitations on my access to this database now as I am not able to run some of my C# code against the database. How can I fix this in SQL server so that I am not a Restriced user.
Example of what I am talking about. In SQL server my database is named Gorlaz. Just to the left of this is a yellow Icon that represents the database "Gorlaz". For illustration purposes I will use the character "$" to substitute for the yellow database icon. So this is how it reads in SQL server management studio.
$Gorlaz(Restricted User)
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May 9, 2008
Can anyone help me with this? The objective is to allow an application user (with db_datareader & db_datawriter database roles assigned) to be able to create tables in the assigned schema (dbo) via a new role.
-- Create User
use master
go
create login DBA with password='xx', CHECK_EXPIRATION=ON, CHECK_POLICY=ON
use AdventureWorks
go
create user dba from login DBA
alter user dba with DEFAULT_SCHEMA=dbo
go
-- Create Role
use AdventureWorks
go
create role sp_ddl_role AUTHORIZATION dbo
grant CREATE TABLE to sp_ddl_role
-- assign user to Role
use AdventureWorks
go
exec sp_addrolemember sp_ddl_role, dba
go
-- Create Table statement then run with following error
Error:
Msg 2760, Level 16, State 1, Line 1
The specified schema name "dbo" either does not exist or you do not have permission to use it.
Remedy: Grant ALTER on schema::dbo to sp_ddl_role
My problem is that I want to restrict user permissions via this role to just the CREATE TABLE and granting ALTER on a SCHEMA will open up a whole lot more permissions from a security standpoint.
Question: How do I restirct this role to just the CREATE TABLE within a SCHEMA?
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Mar 1, 2007
Hello (help),
In SQL2000, when the Guest account was assigned into a role, such as db_datareader, then querying across databases worked just fine.
Specifically:
I have a Report Writer application that connects to the SQL Server with a login (ReportRunner) that actually has very limited permissions on a database.
The connection is then set (sp_setapprole) to use an Application role (App_RR) that has the necessary permissions.
The report-writer app calls a Stored Procedure that gathers data from several other databases (on the same SQL instance).
In SQL 2000, accessing these other databases was done through Guest - we assigned Guest to the db_datareader role. All worked fine.
We've just upgraded to SQL2005: reports started failing. It seems that although guest is assigned to the db_datareader role, the permissions for Guest don't allow selecting from tables via the db_datareader role: we've had to GRANT SELECT TO Guest specifically on the tables necessary for the report.
Is anyone aware of a design change withing SQL Server such that the Guest principal's roles are disregarded when assessing permission? Is there a new and better way to structure the permissions?
Thanks in advance for your help.
Mark Starr
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Jul 19, 2006
We have been storing packages in the File System folder. We had noticed that there seemed to be times when re-importing an existing package did not seem to update it properly. We tried deleting the existing package first rather than overwriting it, but to no avail.
Today we noticed that there were two DTS90Packages folders, one on the C drive and one on the D drive. The dates on the files in those folders showed that sometimes the import put the file on one drive, and other times on the other drive.
The MsDtsSrvr.ini.xml file shows this: "<StorePath>..Packages</StorePath> ".
We intend to stored the packages in the msdb database instead in order to work around this problem.
Has anyone else noticed this happening?
Thanks,
Ron
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Oct 10, 2007
Hi:
When I restore DB from testing to production, we want to remove extra access rights granted to public group. Is there a simple way to query to find out for which objects (table, view, sp, fn) that public group were granted select, delete, update insert, or execute rights?
My objective is to write a sp to remove all user assigned rights to public group (role), but not to deny any rights. How to do it?
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Mar 3, 2006
Is
there a way to find a list of Windows User accounts that are directly
or indirectly (through Windows Group membership) assigned to a database
role?
I could put work in to CLR programming or using a Linked Server to
Active Directory, but if there is a sys.* view available that can
provide me this
information directly it would be much easier.
I'll be looking into this further myself anyway and posting an answer
if I can find one, but if anyone has suggestions... well, thanks!
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Oct 14, 2007
Hi,
I have a script component. What it does, it queries the a table using a connectionstring assigned to it in the Connection Managers Editor (which is an ado.net adapter). this works fine when i'm using a windows login in the ado.net connection manager. But when i changed my connection to use SQL server login, I encounter this error:
OnError,,,Add new records to Dim_T_Status (Case),,,10/14/2007 5:54:47 PM,10/14/2007 5:54:47 PM,-1073450910,0x,System.Data.SqlClient.SqlException: Login failed for user 'CS_REPORT'.
at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.HandleUserException(Exception e)
at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.ProcessInput(Int32 inputID, PipelineBuffer buffer)
at Microsoft.SqlServer.Dts.Pipeline.ManagedComponentHost.HostProcessInput(IDTSManagedComponentWrapper90 wrapper, Int32 inputID, IDTSBuffer90 pDTSBuffer, IntPtr bufferWirePacket)
OnError,,,LOAD AND UPDATE OCEAN Dimension Tables,,,10/14/2007 5:54:47 PM,10/14/2007 5:54:47 PM,-1073450910,0x,System.Data.SqlClient.SqlException: Login failed for user 'CS_REPORT'.
at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.HandleUserException(Exception e)
at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.ProcessInput(Int32 inputID, PipelineBuffer buffer)
at Microsoft.SqlServer.Dts.Pipeline.ManagedComponentHost.HostProcessInput(IDTSManagedComponentWrapper90 wrapper, Int32 inputID, IDTSBuffer90 pDTSBuffer, IntPtr bufferWirePacket)
OnError,,,LoadOCEANDimensions,,,10/14/2007 5:54:47 PM,10/14/2007 5:54:47 PM,-1073450910,0x,System.Data.SqlClient.SqlException: Login failed for user 'CS_REPORT'.
at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.HandleUserException(Exception e)
at Microsoft.SqlServer.Dts.Pipeline.ScriptComponentHost.ProcessInput(Int32 inputID, PipelineBuffer buffer)
at Microsoft.SqlServer.Dts.Pipeline.ManagedComponentHost.HostProcessInput(IDTSManagedComponentWrapper90 wrapper, Int32 inputID, IDTSBuffer90 pDTSBuffer, IntPtr bufferWirePacket)
How to go about this?
cherriesh
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Nov 14, 2006
Hey,
I'm new to this whole SQL Server 2005 thing as well as database design and I've read up on various ways I can integrate business constraints into my database. I'm not sure which way applies to me, but I could use a helping hand in the right direction.
A quick explanation of the various tables I'm dealing with:
WBS - the Work Breakdown Structure, for example: A - Widget 1, AA - Widget 1 Subsystem 1, and etc.
Impacts - the Risk or Opportunity impacts for the weights of a part/assembly. (See Assemblies have Impacts below)
Allocations - the review of the product in question, say Widget 1, in terms of various weight totals, including all parts. Example - September allocation, Initial Demo allocation, etc. Mostly used for weight history and trending
Parts - There are hundreds of Parts which will eventually lead to thousands. Each part has a WBS element. [Seems redundant, but parts are managed in-house, and WBS elements are cross-company and issued by the Government]
Parts have Allocations - For weight history and trending (see Allocations). Example, Nut 17 can have a September 1st allocation, a September 5th allocation, etc.
Assemblies - Parts are assemblies by themselves and can belong to multiple assemblies. Now, there can be multiple parts on a product, say, an unmanned ground vehicle (UGV), and so those parts can belong to a higher "assembly" [For example, there can be 3 Nut 17's (lower assembly) on Widget 1 Subsystem 2 (higher assembly) and 4 more on Widget 1 Subsystem 5, etc.]. What I'm concerned about is ensuring that the weight roll-ups are accurate for all of the assemblies.
Assemblies have Impacts - There is a risk and opportunity impact setup modeled into this design to allow for a risk or opportunity to be marked on a per-assembly level. That's all this table represents.
A part is allocated a weight and then assigned to an assembly. The Assemblies table holds this hierarchical information - the lower assembly and the higher one, both of which are Parts entries in the [Parts have Allocations] table.
Therefore, to ensure proper weight roll ups in the [Parts have Allocations] table on a per part-basis, I would like to check for any inserts, updates, deletes on both the [Parts have Allocations] table as well as the [Assemblies] table and then re-calculate the weight roll up for every assembly. Now, I'm not sure if this is a huge performance hog, but I do need to keep all the information as up-to-date and as accurate as possible. As such, I'm not sure which method is even correct, although it seems an AFTER DML trigger is in order (from what I've gathered thus far). Keep in mind, this trigger needs to go through and check every WBS or Part and then go through and check all of it's associated assemblies and then ensure the weights are correct by re-summing the weights listed.
If you need the design or create script (table layout), please let me know.
Thanks.
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Jul 20, 2005
Are there any limitations or gotchas to updating the same table whichfired a trigger from within the trigger?Some example code below. Hmmm.... This example seems to be workingfine so it must be something with my specific schema/code. We'reworking on running a SQL trace but if anybody has any input, fireaway.Thanks!create table x(Id int,Account varchar(25),Info int)GOinsert into x values ( 1, 'Smith', 15);insert into x values ( 2, 'SmithX', 25);/* Update trigger tu_x for table x */create trigger tu_xon xfor updateasbegindeclare @TriggerRowCount intset @TriggerRowCount = @@ROWCOUNTif ( @TriggerRowCount = 0 )returnif ( @TriggerRowCount > 1 )beginraiserror( 'tu_x: @@ROWCOUNT[%d] Trigger does not handle @@ROWCOUNT[color=blue]> 1 !', 17, 127, @TriggerRowCount) with seterror, nowait[/color]returnendupdate xsetAccount = left( i.Account, 24) + 'X',Info = i.Infofrom deleted, inserted iwhere x.Account = left( deleted.Account, 24) + 'X'endupdate x set Account = 'Blair', Info = 999 where Account = 'Smith'
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Dec 5, 2006
This Audit Trigger is Generic (i.e. non-"Table Specific") attach it to any tabel and it should work. Be sure and create the 'Audit' table first though.
The following code write audit entries to a Table called
'Audit'
with columns
'ActionType' //varchar
'TableName' //varchar
'PK' //varchar
'FieldName' //varchar
'OldValue' //varchar
'NewValue' //varchar
'ChangeDateTime' //datetime
'ChangeBy' //varchar
using System;
using System.Data;
using System.Data.SqlClient;
using Microsoft.SqlServer.Server;
public partial class Triggers
{
//A Generic Trigger for Insert, Update and Delete Actions on any Table
[Microsoft.SqlServer.Server.SqlTrigger(Name = "AuditTrigger", Event = "FOR INSERT, UPDATE, DELETE")]
public static void AuditTrigger()
{
SqlTriggerContext tcontext = SqlContext.TriggerContext; //Trigger Context
string TName; //Where we store the Altered Table's Name
string User; //Where we will store the Database Username
DataRow iRow; //DataRow to hold the inserted values
DataRow dRow; //DataRow to how the deleted/overwritten values
DataRow aRow; //Audit DataRow to build our Audit entry with
string PKString; //Will temporarily store the Primary Key Column Names and Values here
using (SqlConnection conn = new SqlConnection("context connection=true"))//Our Connection
{
conn.Open();//Open the Connection
//Build the AuditAdapter and Mathcing Table
SqlDataAdapter AuditAdapter = new SqlDataAdapter("SELECT * FROM Audit WHERE 1=0", conn);
DataTable AuditTable = new DataTable();
AuditAdapter.FillSchema(AuditTable, SchemaType.Source);
SqlCommandBuilder AuditCommandBuilder = new SqlCommandBuilder(AuditAdapter);//Populates the Insert command for us
//Get the inserted values
SqlDataAdapter Loader = new SqlDataAdapter("SELECT * from INSERTED", conn);
DataTable inserted = new DataTable();
Loader.Fill(inserted);
//Get the deleted and/or overwritten values
Loader.SelectCommand.CommandText = "SELECT * from DELETED";
DataTable deleted = new DataTable();
Loader.Fill(deleted);
//Retrieve the Name of the Table that currently has a lock from the executing command(i.e. the one that caused this trigger to fire)
SqlCommand cmd = new SqlCommand("SELECT object_name(resource_associated_entity_id) FROM
ys.dm_tran_locks WHERE request_session_id = @@spid and resource_type = 'OBJECT'", conn);
TName = cmd.ExecuteScalar().ToString();
//Retrieve the UserName of the current Database User
SqlCommand curUserCommand = new SqlCommand("SELECT system_user", conn);
User = curUserCommand.ExecuteScalar().ToString();
//Adapted the following command from a T-SQL audit trigger by Nigel Rivett
//http://www.nigelrivett.net/AuditTrailTrigger.html
SqlDataAdapter PKTableAdapter = new SqlDataAdapter(@"SELECT c.COLUMN_NAME
from INFORMATION_SCHEMA.TABLE_CONSTRAINTS pk ,
INFORMATION_SCHEMA.KEY_COLUMN_USAGE c
where pk.TABLE_NAME = '" + TName + @"'
and CONSTRAINT_TYPE = 'PRIMARY KEY'
and c.TABLE_NAME = pk.TABLE_NAME
and c.CONSTRAINT_NAME = pk.CONSTRAINT_NAME", conn);
DataTable PKTable = new DataTable();
PKTableAdapter.Fill(PKTable);
switch (tcontext.TriggerAction)//Switch on the Action occuring on the Table
{
case TriggerAction.Update:
iRow = inserted.Rows[0];//Get the inserted values in row form
dRow = deleted.Rows[0];//Get the overwritten values in row form
PKString = PKStringBuilder(PKTable, iRow);//the the Primary Keys and There values as a string
foreach (DataColumn column in inserted.Columns)//Walk through all possible Table Columns
{
if (!iRow[column.Ordinal].Equals(dRow[column.Ordinal]))//If value changed
{
//Build an Audit Entry
aRow = AuditTable.NewRow();
aRow["ActionType"] = "U";//U for Update
aRow["TableName"] = TName;
aRow["PK"] = PKString;
aRow["FieldName"] = column.ColumnName;
aRow["OldValue"] = dRow[column.Ordinal].ToString();
aRow["NewValue"] = iRow[column.Ordinal].ToString();
aRow["ChangeDateTime"] = DateTime.Now.ToString();
aRow["ChangedBy"] = User;
AuditTable.Rows.InsertAt(aRow, 0);//Insert the entry
}
}
break;
case TriggerAction.Insert:
iRow = inserted.Rows[0];
PKString = PKStringBuilder(PKTable, iRow);
foreach (DataColumn column in inserted.Columns)
{
//Build an Audit Entry
aRow = AuditTable.NewRow();
aRow["ActionType"] = "I";//I for Insert
aRow["TableName"] = TName;
aRow["PK"] = PKString;
aRow["FieldName"] = column.ColumnName;
aRow["OldValue"] = null;
aRow["NewValue"] = iRow[column.Ordinal].ToString();
aRow["ChangeDateTime"] = DateTime.Now.ToString();
aRow["ChangedBy"] = User;
AuditTable.Rows.InsertAt(aRow, 0);//Insert the Entry
}
break;
case TriggerAction.Delete:
dRow = deleted.Rows[0];
PKString = PKStringBuilder(PKTable, dRow);
foreach (DataColumn column in inserted.Columns)
{
//Build and Audit Entry
aRow = AuditTable.NewRow();
aRow["ActionType"] = "D";//D for Delete
aRow["TableName"] = TName;
aRow["PK"] = PKString;
aRow["FieldName"] = column.ColumnName;
aRow["OldValue"] = dRow[column.Ordinal].ToString();
aRow["NewValue"] = null;
aRow["ChangeDateTime"] = DateTime.Now.ToString();
aRow["ChangedBy"] = User;
AuditTable.Rows.InsertAt(aRow, 0);//Insert the Entry
}
break;
default:
//Do Nothing
break;
}
AuditAdapter.Update(AuditTable);//Write all Audit Entries back to AuditTable
conn.Close(); //Close the Connection
}
}
//Helper function that takes a Table of the Primary Key Column Names and the modified rows Values
//and builds a string of the form "<PKColumn1Name=Value1>,PKColumn2Name=Value2>,......"
public static string PKStringBuilder(DataTable primaryKeysTable, DataRow valuesDataRow)
{
string temp = String.Empty;
foreach (DataRow kColumn in primaryKeysTable.Rows)//for all Primary Keys of the Table that is being changed
{
temp = String.Concat(temp, String.Concat("<", kColumn[0].ToString(), "=", valuesDataRow[kColumn[0].ToString)].ToString(), ">,"));
}
return temp;
}
}
The trick was getting the Table Name and the Primary Key Columns.
I hope this code is found useful.
Comments and Suggestion will be much appreciated.
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Oct 30, 2007
Table 1
First_Name
Middle_Name
Surname
John
Ian
Lennon
Mike
Buffalo
Tyson
Tom
Finney
Jones
Table 2
ID
F
M
S
DOB
1
Athony
Harold
Wilson
24/4/67
2
Margaret
Betty
Thathcer
1/1/1808
3
John
Ian
Lennon
2/2/1979
4
Mike
Buffalo
Tyson
3/4/04
5
Tom
Finney
Jones
1/1/2000
I want to be able to create a trigger that updates table 2 when a row is inserted into table 1. However I€™m not sure how to increment the ID in table 2 or to update only the row that has been inserted.
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Feb 5, 2008
A
ID
Name
1
Joe
2
Fred
3
Ian
4
Bill
B
ID
1
4
I want to be able to create a trigger so that when a row is inserted into table A by a specific user then the ID will appear in table B. Is it possible to find out the login id of the user inserting a row?
I believe the trigger should look something like this:
create trigger test_trigger
on a
for insert
as
insert into b(ID)
select i.id
from inserted i
where
--specific USER
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Mar 18, 2008
how to create new CLR trigger from existing T-Sql Trigger Thanks in advance
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Jul 23, 2005
When a row gets modified and it invokes a trigger, we would like to beable to update the row that was modified inside the trigger. This is(basically) how we are doing it now:CREATE TRIGGER trTBL ON TBLFOR UPDATE, INSERT, DELETEasupdate TBLset fld = 'value'from inserted, TBLwhere inserted.id= TBL.id....This work fine but it seems like it could be optimized. Clearly we arehaving to scan the entire table again to update the row. But shouldn'tthe trigger already know which row invoked it. Do we have to scan thetable again for this row or is their some syntax that allows us toupdate the row that invoked the trigger. If not, why. It seems likethis would be a fairly common task. Thanks.
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Jul 20, 2005
Salve, non riesco a disabilitare un trigger su sqlserver nè da queryanalyzer, nè da enterprise manager.In pratica tal cosa riuscivo a farla in Oracle con TOAD, mentre qui nonriesco.Mi interessa disattivarlo senza cancellarlo per poi riattivarlo al bisognosenza rilanciare lo script di creazione.Grazie a tuttiHi I need to disable a DB trigger and I'm not able to do this neither withquery analyzer, neither with enterprise manager.I remeber this job was quite simple using TOAd in Oracle.I'm interested in making it disabled not delete it, without run creationscript.Thanks a lot to everybody.
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May 30, 2008
Hi,
I am not sure if this is the right forum to post this question.
I run an update statement like "Update mytable set status='S' " on the SQL 2005 management Studio.
When I run "select * from mytable" for a few seconds all status = "S". After a few seconds all status turn to "H".
This is a behaviour when you have an update trigger for the table. But I don't see any triggers under this table.
What else would cause the database automatically change my update?
Could there be any other place I should look for an update trigger on this table?
Thanks,
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Sep 20, 2007
Hi all in .net I've created an application that allows creation of triggers, i also want to allow the deletion of triggers.
The trigger name is kept in a table, and apon deleting the record i want to use the field name to delete the trigger
I have the following Trigger
the error is at
DROP TRIGGER @DeleteTrigger
I'm guessing it dosen't like the trigger name being a variable instead of a static name
how do i get around this?
thanks in advance
-- ================================================
-- Template generated from Template Explorer using:
-- Create Trigger (New Menu).SQL
--
-- Use the Specify Values for Template Parameters
-- command (Ctrl-Shift-M) to fill in the parameter
-- values below.
--
-- See additional Create Trigger templates for more
-- examples of different Trigger statements.
--
-- This block of comments will not be included in
-- the definition of the function.
-- ================================================
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author: <Author,,Name>
-- Create date: <Create Date,,>
-- Description: <Description,,>
-- =============================================
CREATE TRIGGER RemoveTriggers
ON tblTriggers
AFTER DELETE
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
Declare @DeleteTrigger as nvarchar(max)
select @DeleteTrigger = TableName FROM DELETED
IF OBJECT_ID (@DeleteTrigger,'TR') IS NOT NULL
DROP TRIGGER @DeleteTrigger
GO
END
GO
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Jan 23, 2008
Hi,
I have a trigger set on TABLE1 so that any update to this column should set off trigger to write to the AUDIT log table, it works fine otherwise but not the very first time when table1 has null in the column. if i comment out
and i.req_fname <> d.req_fname from the where clause then it works fine the first time too. Seems like null value of the column is messing things up
Any thoughts?
Here is my t-sql
Insert into dbo.AUDIT (audit_req, audit_new_value, audit_field, audit_user)
select i.req_guid, i.req_fname, 'req_fname', IsNull(i.req_last_update_user,@default_user) as username from inserted i, deleted d
where i.req_guid = d.req_guid
and i.req_fname <> d.req_fname
Thanks,
leo
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