Executing DDL In A Trigger

Nov 15, 2000

Dear All,
I would like to execute a DDL statement(create table) in a trigger. The DDL statement is stored as a field in another table. I have read that sql statement into a variable of type varchar. How do I execute that sql statement.
Thanks in advance

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Executing Trigger

Nov 28, 2007



Hi Everybody,


I am new to ms sql server i had small proublem

i am created Trigger it will work so fine command successfully

how can i executed that Trigger plz help

Regards
subu

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Trigger Not Executing

Aug 13, 2006

I will try to keep this as simple as possible and make a long story short. The college I work for has bought a third party package to basically run the operations of the school. There is a component for registration, admissions, billing, etc. It also has a web component so students can access their school information from anywhere. The backend for all of this is SQL Server. To make things easy, the vendor has provided us with the steps to bulk load users, via DTS, into the system and create their accounts for the web portion. The way this works is as follows:

I create a CSV file which I then load via DTS into their "Bulk Load" table. This table has an "on insert" trigger that fires off when the load happens on the "Bulk Load" table. The trigger verifies that the user exists in the system, encrypts the password I provide in the file and inserts the record into an "Accounts" table. This "Accounts" table is where the system checks when a user logs in. Everything works fine on our test server, but in live, the trigger does not execute. The DTS package executes and the "Bulk Load" table gets updated, but the "Accounts" table does not. My file has 382 valid students and again, it worked fine on the test server.

Differences between the servers:

1. The DTS packages are the same, except for the server they connect to.

2. The test server is stand alone, while the production server is clustered.

What I tried:

1. A ran the alter statement to enable the trigger thinking it might be disabled.

2. Dropped the trigger on production and re-created it with the trigger from our test server.

3. Tried to run a trace (I had never done that before). Noticed some sp's running, but none of them were sp's found in the trigger.



Any thoughts or ideas as to what I can check? Do triggers have certain permissions and if so, where can I make sure I have the permissions. I should have full access under my account as should the account that SQL Server Agent is logged in as.

Thanks for any help.

Pete

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hi.
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Below is my requirement..

Create trigger on Table_XYZ ( After Insert,After Update)
select @var=Col_Last field is null from inserted
if @var is null
Execute sProc1
create proc sproc1
Business logic will create two csv files. Success and error files
success record will be deleted from Table_XYZ,
Error records updated with error_message.

Problem:- When i am updating Col_Last value to null or insert a record with NULL for Col_Last

Trigger is firing and executing SP.....But i was not able query the Table_XYZ and taking too much time...

sp_who2 shows blocked by...my SPID only

when i am executing SP alone ...every thing works fine....

when i am doing testing on trigger with Insert/Update... i am getting executinf query... no response...

If i comment below ones in Trigger...working fine...

--if @var is null
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May 7, 2008

I have a database trigger that is set to call a CLR trigger/stored proc when a certain field in a table is updated. The issue is that if i execute the stored proc manually in enterprise studio, it works perfectly but the same call made through the trigger does not go through. A few more details -


I have CLR integration enabled on the sql server.

The dbo has UNSAFE ASSEMBLY rights

I have the both the assembly and the serialized dll imported in the database.


Here's the definition of the stored proc -


CREATE PROCEDURE [dbo].[WriteXMLNotification]

@TaskID [nvarchar](20)

WITH EXECUTE AS CALLER

AS

EXTERNAL NAME [DataInterfaceWebServices].[TaskUpdateXMLWriter.WriteXMLNotification].[run]



and the trigger -



CREATE TRIGGER [dbo].[tr_Task_U]

ON [dbo].[_Task]

FOR UPDATE, INSERT AS

IF UPDATE (TaskType_Status) OR UPDATE (TaskType) OR UPDATE (TaskType_SubType1)

BEGIN

SET NOCOUNT ON;

DECLARE @status AS INT

DECLARE @taskType AS INT

DECLARE @taskSubType AS INT

DECLARE @taskID as sysname

DECLARE @cmd as sysname

DECLARE @parentTask as sysname

DECLARE @NotificationXMLTaskID as sysname



SELECT @status = [TaskType_Status] FROM inserted

SELECT @taskType = [TaskType] FROM inserted

SELECT @taskSubType = [TaskType_SubType1] FROM inserted

SELECT @taskID = [TaskID] FROM inserted

SELECT @parentTask = [Parent_TaskID] FROM inserted

SELECT @NotificationXMLTaskID = [MCCTaskID] FROM _TaskNotificationXML WHERE [MCCTaskID] = @parentTask



IF (@status = 2602) AND (@taskType = 2282) AND (@taskSubType = 19500)

BEGIN

exec WriteXMLNotification @taskID;

END

ELSE IF (@taskType = 2285) AND (@parentTask IS NOT NULL) AND (@NotificationXMLTaskID IS NOT NULL)

BEGIN

exec WriteXMLNotification @parentTask;

END



END


I stepped into the trigger and it seems to execute the line " exec WriteXMLNotification @taskID;" but nothing happens, but if I run that same line manually, it works. Could it be that the impersonation by the EXECUTE AS clause is causing it to fail?

Please advise!

Thanks in Advance,
-Mihir Sonalkar.

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Trigger code:--
CREATE TRIGGER [tr_DBA_create_database_notification] ON ALL SERVER 
AFTER CREATE_DATABASE
AS 
--execute dbadmin.dbo.usp_DBA_Refresh_DBAdmin_Tables

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This issue was noticed on a 2012 version, that I was first testing on, then had the same issue on a 2008 R2. I am currently testing on a 2014 version, that is doing the same thing. Is the logon trigger itself, firing, and causing this?

I also tried using the After Logon option, and got the same issue.

Here is the code:

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ON ALL SERVER WITH EXECUTE AS 'sa'
FOR LOGON
AS
BEGIN
DECLARE @Body NVARCHAR(2000),

[code]....

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Please see the image through this url http://kyxao.net/127/ExecutionProblem.png


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Hey,

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Thanks.

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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


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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)

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where
--specific USER

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the error is at

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-- ================================================

-- 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,,>

-- =============================================

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AFTER DELETE

AS

BEGIN

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SET NOCOUNT ON;

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GO

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GO

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Hi,

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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


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leo

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Does Any one know how to execute DTS (on sql server) from ASP.NET??

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Executing DTS Package From VB.NET

Nov 16, 2004

Hello,

I have a web application that I kick off a DTS package. I tested the package and it works fine. However, when running the package through ASP.NET, I get the following error:

Type mismatch. (mscorlib (80004005): Missing parameter does not have a default value. Parameter name: parameters)

I've traced it to a dynamic task step. I have this as the first step in the workflow, but for some reason, it is executing last. Which is definitely not the place where I want it. Is there anyway I can force it, or why is it doing that?

Any ideas?

Brian

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Job Sticks On &#34;executing&#34;

Jan 18, 2001

Hi, I have a DTS package that runs correctly when executed it manually, but when I schedule a job via the package, the job begins executing, but does not stop. I have to cancel it. The Package runs in less that 1 minute, but the job reports that it's being executed but does not stop until I cancel it.

The job was created by using the DTS package schedule command, so how can I check what's wrong?

Thanks in advance.

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Executing SP In Loop

Sep 21, 2000

What is way for executing SP in loop? I have to delete some records in table X depends on records from table Y. Simple way is:

DELETE FROM X
WHERE X.ID IN
(
SELECT ID FROM Y WHERE ...
)

But if deleting from X is not so simply (after deleting from X I have to delte it from 5 others tables) ? I've created SP 'SP_DELETE_X' which has input parameter 'ID'. My question is how execute this SP in above loop???

Fly

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