Problem Retrieving @@Identity When Inside A Transaction.
Aug 22, 2005
I'm using transactions with my SqlConnection ( sqlConnection.BeginTransaction() ).
I do an Insert into my User table, and then subsequently use the
generated identity ( via @@identity ) to make an insert into another
table. The foreign key relationship is dependant on the generated
identity. For some reason with transactions, I can't retrieve the
insert identity (it always returns as 1). However, I need the
inserts to be under a transaction so that one cannot succeed while the
other fails. Does anyone know a way around this problem?
So heres a simplefied explanation of what I'm trying to do:
Begin Transaction
Insert into User Table
Retrieve Inserted Identity (userID) via @@Identity
Insert into UserContact table, using userID as the foreign key.
Commit Transaction.
Because of the transaction, userID is 1, therefore an insert cannot be
made into the UserContact table because of the foreign key constraint.
I need this to be a transaction in case one or the other fails. Any ideas??
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Nov 14, 2006
Hey, I've been having problems - when trying to insert a new row i've been trying to get back the unique ID for that row. I've added "SELECT @MY_ID = SCOPE_IDENTITY();" to my query but I am unable get the data. If anyone has a better approach to this let me know because I am having lots of problems. Thanks,Lang
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Oct 2, 2007
The following code inserts a record into a table. I now wish to retrieve the IDENTITY of that entry into a variable so that I can use it again as input for other inserts. Can someone offer assistance in handling this.... I tried several alternatives that I found on the internet but none seem to work...
Thanks!
Dim objConn3 As SqlConnectionDim mySettings3 As New NameValueCollectionmySettings3 = AppSettingsDim strConn3 As StringstrConn3 = mySettings3("connString")objConn3 = New SqlConnection(strConn3)Dim strInsertPatient As StringDim cmdInsert As SqlCommandDim strddlSex As StringDim strddlPatientState As StringDim rowsAffected As Integer
strddlSex = ddlSex.SelectedItem.TextstrddlPatientState = ddlPatientState.SelectedItem.TextstrInsertPatient = "Insert ClinicalPatient ( UserID, Accession, FirstName, MI, " & _"LastName, MedRecord, ddlSex, DOB, Address1, Address2, City, Suite, strddlPatientState, " & _"ZIP, HomeTelephone, OutsideNYC, ClinicalImpression, Today_Date_Month, Today_Date_Day, " & _"Today_Date_Year) Values (@UserID, @Accession, @FirstName, @MI, @LastName, @MedRecord, " & _"'" & strddlSex & "', @DOB, @Address1, @Address2, @City, @Suite , '" & strddlPatientState & "', " & _"@ZIP, @HomeTelephone, @OutsideNYC, @ClinicalImpression, @Today_Date_Month, @Today_Date_Day, " & _"@Today_Date_Year)SELECT @@IDENTITY AS NewID SET NOCOUNT OFF"
cmdInsert = New SqlCommand(strInsertPatient, objConn3)
cmdInsert.Parameters.Add("@UserID", "Joe For Now")cmdInsert.Parameters.Add("@Accession", Accession.Text)cmdInsert.Parameters.Add("@LastName", LastName.Text)cmdInsert.Parameters.Add("@MI", MI.Text)cmdInsert.Parameters.Add("@FirstName", FirstName.Text)cmdInsert.Parameters.Add("@MedRecord", MedRecord.Text)cmdInsert.Parameters.Add("@ddlSex", strddlSex)cmdInsert.Parameters.Add("@DOB", DOB.Text)cmdInsert.Parameters.Add("@Address1", Address1.Text)cmdInsert.Parameters.Add("@Address2", Address2.Text)cmdInsert.Parameters.Add("@City", City.Text)cmdInsert.Parameters.Add("@Suite", Suite.Text)cmdInsert.Parameters.Add("@strddlPatientState", strddlPatientState)cmdInsert.Parameters.Add("@ZIP", zip.Text)cmdInsert.Parameters.Add("@HomeTelephone", Phone.Text)cmdInsert.Parameters.Add("@OutsideNYC", OutsideNYC.Text)cmdInsert.Parameters.Add("@ClinicalImpression", ClinicalImpression.Text)cmdInsert.Parameters.Add("@Today_Date_Month", Today_Date_Month.Text)cmdInsert.Parameters.Add("@Today_Date_Day", Today_Date_Day.Text)cmdInsert.Parameters.Add("@Today_Date_Year", Today_Date_Year.Text)
objConn3.Open()cmdInsert.ExecuteNonQuery()objConn3.Close()
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Jul 26, 2007
I have a database that has a tble with a field that autoincrements as a primary key. meanig that the field type is BigInteger and it is set up as my Identity Column. Now when I insert a new record that field gets updated automaticly.
How can I get this value in the same operation as my insert? meaning, in 1 sub, I insert a new record but then need to retieve the Identity Value. All in the same procedure.
Waht is the way to achive this please?
Marc
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Feb 29, 2008
I have 2 tables - tblOrders and tblOrderDetails. Every time an order is placed, 2 INSERT statements are executed. The first one enters the general order and customer information in the tblOrders table:INSERT INTO tblOrders (custname, custdetails, orderdate) VALUES (@custname, @custdetails, @orderdate)The primary key in this table is OrderID which is an Identity column. This is the foreign key in the tblOrderDetails table.I'm trying to get the Identity value from the first INSERT statement to use in the second INSERT statement:INSERT INTO tblOrderDetails (orderid, productid, productcost) VALUES (@orderid, @productid, @productcost) How do i obtain this value and how would I supply it to the second INSERT statement?
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Jul 11, 2006
Hello!I use a procedure to insert a new row into a table with an identitycolumn. The procedure has an output parameter which gives me theinserted identity value. This worked well for a long time. Now theidentity value is over 700.000 and I get errors whiles retrieving theinserted identitiy value. If I delete rows and reset the identityeverything works well again. So I think it is a data type problem.My Procedure:create procedure InsertProduct@NEWID int outputasbeginset nocount oninsert into PRODUCT(D_CREATED)values(getdate()+'')set nocount offselect @NEWID = @@IDENTITYendMy C# code:SqlCommand comm = new SqlCommand("InsertProduct", sqlCon);comm.CommandType = CommandType.StoredProcedure;comm.Parameters.Add(new SqlParameter("@NEWID",System.Data.SqlDbType.Int)).Direction =System.Data.ParameterDirection.Output;try{SqlDataReader sqlRead = comm.ExecuteReader();object o = comm.Parameters["@NEWID"].Value;//...}catch ( Exception ex ){throw ex;}The object o is alwaya System.DbNull. I also tried to use bigint.Any hints are welcomeCiaoSusanne
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Mar 19, 2008
I'm at loss how I'm supposed to work with typed datasets and Sql Server Compact 3.5, when inserting records and I need to update my datatables with the primary key of newly inserted rows.
I've tried adding a RowUpdated handler to all tableadapters that look like this:
Code Snippet
void Adapter_RowUpdated(object sender, System.Data.SqlServerCe.SqlCeRowUpdatedEventArgs e) {
if(e.Status == UpdateStatus.Continue && e.StatementType == StatementType.Insert) {
if(e.Row.Table.PrimaryKey.Length > 0) {
SqlCeCommand selectIdentityCommand = new SqlCeCommand("SELECT @@IDENTITY",e.Command.Connection);
if(e.Command.Connection.State == ConnectionState.Open) {
e.Row[e.Row.Table.PrimaryKey[0].Ordinal] = (int)selectIdentityCommand.ExecuteScalar();
}
}
}
I've previously used this type of approach when working with an OleDbDatabase, which works just fine. But it doesn't work with Sql Server CE 3.5, and since it doesn't support stored procedures I can't fix it that way either. And it doesn't support commands in a batch (i.e appending the Insert command of the adapter with ";SELECT @@IDENTITY") so that doesn't work either...
So how are we supposed to use Sql Server CE 3.5? It's impossible together with datasets? Or am I missing something obvious?
Any hints would be greatly appreciated! Thanks!
Cheers!
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Mar 11, 2015
I am using following queries in a stored procedure.This stored procedure is executed through a dot net application.
DECLARE @DEPTNBR BIGINT
SELECT @DEPTNBR = DEPTNBR
FROM DEPARTMENT_DETAILS WITH (UPDLOCK,READPAST)
WHERE STATUS= 1
UPDATE DEPARTMENT_DETAILS SET STATUS= 0 WHERE DEPTNBR = @DEPTNBR
SELECT DEPTNBR,DEPTNAME,DEPTLOC FROM DEPARTMENT_DETAILS WHERE DEPTNBR = @DEPTNBR
From my queries,I am providing a available department information.Each user needs to get unique available department information.But when more number of users using the application concurrently, multiple users getting same department information.How to solve my problem?I always wants to get unique department information even though multiple users using the application concurrently.
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Jul 20, 2005
Hi All,This seems like a tricky question to me. I have a Stored Procedurethat encapsulates a number of updates to various tables within atransaction.However, at a later part of the transaction I need to be able toselect records changed by an update statement made earlier within thesame stored proc (and within the same transaction) and need for thatselect to reflect the changed values.My understanding, however, is that the records aren't actually changedby the update statement until the transaction is committed, andtherefore my later select statement won't return the expected recordsbecause the update is being held until the transaction is committed.Is this accurate? And, if so, is there a reasonable workaround thatstill leaves me able to rollback the entire transaction if I strike aproblem somewhere along the way?So, a pseudo code example would be:BEGIN TRANSACTIONUPDATE mytable SET myid = @yourid WHERE myid = @idSELECT * FROM mytable where myid = @idCOMMIT TRANSACTIONIn this above example, would the select statement return the recordsthat have a myid value of @id as before the update as after theupdate?Many, many thanks in advance!Much warmth,Murray
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May 10, 2007
Dear Friends... I'm having a problem...
I want to manually create the identity column for a table...
I have some dataflws, and in each dataflow I insert values in this table...
I need to start the controlflow in a SQL task to get the last ID and save it in a global variable with name D_INST_IDENTITY.
And in each dataflow I have a script component transform, to get the ID... using a local variable COUNTER! and for each row I increment this value...
Until this step there is no problem... the problem starts here...:
I need to refresh the global variable in the final of each dataflow in order that in the next sequence dataflow I have D_INST_IDENTITY refreshed......
D_INST_IDENTITY = D_INST_IDENTITY + COUNTER
How can I do it? I have a RowCount transform next the script component, but generates errors...
What do you think I can do it?
Thanks!!
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Oct 30, 2005
Hi.here is my code with my problem described in the syntax.I am using asp.net 1.1 and VB.NETThanks in advance for your help.I am still a beginner and I know that your time is precious. I would really appreciate it if you could "fill" my example function with the right code that returns the new ID of the newly inserted row.
Public Function howToReturnID(ByVal aCompany As String, ByVal aName As String) As Integer
'that is the variable for the new id.Dim intNewID As Integer
Dim strSQL As String = "INSERT INTO tblAnfragen(aCompany, aName)" & _ "VALUES (@aCompany, @aName); SELECT @NewID = @@identity"
Dim dbConnection As SqlConnection = New SqlConnection(connectionString)Dim dbCommand As SqlCommand = New SqlCommand()dbCommand.CommandText = strSQL
'Here is my problem.'What do I have to do in order to add the parameter @NewID and'how do I read and return the value of @NewID within that function howToReturnID'any help is greatly appreciated!'I cannot use SPs in this application - have to do it this way! :-(
dbCommand.Parameters.Add("@aFirma", aCompany.Trim)dbCommand.Parameters.Add("@aAnsprAnrede", aName.Trim)
dbCommand.Connection = dbConnection
TrydbConnection.Open()dbCommand.ExecuteNonQuery()
'here i want to return the new ID!Return intNewID
Catch ex As Exception
Throw New System.Exception("Error: " & ex.Message.ToString())
Finally
dbCommand.Dispose()dbConnection.Close()dbConnection.Dispose()
End Try
End Function
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Sep 7, 2006
Hi to all,Probably I'm just doing something stupid, but I would like you to tellme that (if it is so), and point the solution.There ist the thing:I' having a sp, where I call other sp inside.The only problem is, the name of this inside sp is builded variously,and executed over sp_executesql:create pprocedure major_sp@prm_outer_1 varchar(1),@prm_outer_2 varchar(2)assome codingset @nvar_stmtStr = N'exec @int_exRetCode = test_sp_' + @prm_outer_1 +@prm_outer_2set @nvar_stmtStr = @nvar_stmtStr + ' @prm_1, @prm_2, @prm_3, @prm_4output'set @nvar_prmStr = N'@prm_1nvarchar(128), ' +N'@prm_2nvarchar(128), ' +N'@prm_3nvarchar(4000), ' +N'@int_exRetCodeint output, ' +N'@prm_4varchar(64) output'exec sp_executesql @nvar_stmtStr,@nvar_prmStr,@prm_1,@prm_2,@prm_3,@int_exRetCode = @int_exRetCode output,@prm_4 = @prm_4 outputNow the issue is, I've transactions inside test_sp_11 lets say wherethe 11 is @prm_outer_1 + @prm_outer_2.These procedures are existing inside database, but are called dynamiclydepending of the parameters.The problem is, when I call the specified sp directly, the rollbacktransaction is working without any problem.Inside this procedures test_sp_xx, is a call of another sp (lets sayinside_sp).There is a transaction included.When it is called over major_sp, then the rollback is not performedbecause of error:Server: Msg 6401, Level 16, State 1, Procedure inside_sp, Line 54Cannot roll back transactio_bubu. No transaction or savepoint of thatname was found.The funniest way is, if there is no error inside, the commit is workingwithout any problem!The question is majory (because I'm almost sure, that this is anissue): is it possible, to have atransaction inside dynamicly called sp over sp_executesql?If ok to do that?Thank's in advanceMatik
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Oct 1, 2007
I have a trigger which requires dropping a member from a role and includes user transactions. However you cannot call sp_droprolemember from within a user transaction. Looking at the code for the procedure gives me a line
quote:
exec %%Owner(Name = @membername).SetRoleMember(RoleID = @roluid, IsMember = 0)
I can find no documentation on SetRoleMember or %%owner and attempts to run this line as an exec statement fails with "syntax error near '%'"
Nor can I find any way of dropping a member from a role using T-SQL or DDL constructs.
How do I drop a member from a role using T-SQL code and avoiding sp_droprolemember? And where do I find information about the %%Owner construct?
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May 6, 2008
Hi,
When i execute the following set of statements only 8 is getting inserted into table instead 6 and 8.
Create Table BPTest(id int)
Declare @Id Int
Set @Id = 0
While (@Id < 10)
Begin
begin tran
Insert into BPTest values (@id)
if(@Id > 5)
begin
if(@Id % 2 = 0)
begin
print 'true' print @Id
commit tran
end
else
begin
print 'false' print @Id
rollback tran
end
end
Set @Id = @Id + 1
End
Select * from BPTest
drop table BPTest
Please let me know the reason for this.
Thanks in advance
Regards,
K. Manivannan
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Feb 26, 2006
Is it normal practice to check for @@ERROR after a SELECT statement that retrieves data from a table OR we should only check for @@ERROR after a DELETE/INSERT/UPDATE type of statement? The SQL statement is inside a transaction.
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May 9, 2007
Please find my second post in this thread.
Can anyone help me in sorting out the problem and let me know what might be the reason.
Thanks & Regards
Pradeep M V
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Oct 9, 2007
Hi,
Can we include a Send Mail Task inside a transaction?
We intend to callback a sent email in case there is an error in the subsequent task, if it is possible.
Thanks and Regards,
B@ns.
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Oct 30, 2006
We are designing an ETL solution for a BI project using SSIS.
We need to load a dimension table from a source DB into the DW; inside the DW there are two tables for each source dimension table: a current dimension table and a storical dimension table.
The source table includes technical columns that indicate if each record was processed correctly by ETL procedures.
Each row in the source table can be a new record, or an exisisting one. If it's a new record, a corresponding new record should be inserted into the current dimension table of the DW; if it's an exisisting one, a new record should be inserted in the storical dimension table and the existing record in the current dimension table should be updated.
Furthermore for each record we need to update the source table with an error code. If the record was processed with succes the code is zero, otherwise it contains an error code.
I try to use a single data flow task, using the 'ole db command trasformation' task for managing update and 'ole db destination' task for managing insert.
The problem is that some insert and update should be executed inside a single transaction, for each record; for example if the source contains a new record I should insert the record in the current dimension table and update the source record with error code zero if every think goes fine.
There is some way to group task in the data flow pane in a single transaction ?
There is a better way to do that ?
Cosimo
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Apr 11, 2006
I have some VB.NET code that starts a transaction and after that executes one by one a lot of queries. Somehow, when I take out the transaction part, my queries are getting executed in around 10 min. With the transaction in place it takes me more than 30 min on one query and then I get timeout.
I have checked sp_lock myprocessid and I've noticed there are a lot of exclusive locks on different objects. Using sp_who I could not see any deadlocks.
I even tried to set the isolation level to Read UNCOMMITED and still have the same problem.
As I said, once I execute my queries without being in a transaction everything works great.
Can you help me to find out the problem?
Thanks,
Laura
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Nov 23, 2005
Hello, everyone:
I have a local transaction,
BEGIN TRAN
INSERT Z_Test SELECT STATE_CODE FROM View_STATE_CODE
COMMIT
View_STATE_CODE points to remote SQL server named PROD. There is error when I run this query:
Server: Msg 8501, Level 16, State 1, Line 12
MSDTC on server 'PROD' is unavailable.
Server: Msg 7391, Level 16, State 1, Line 12
The operation could not be performed because the OLE DB provider 'SQLOLEDB' was unable to begin a distributed transaction.
OLE DB error trace [OLE/DB Provider 'SQLOLEDB' ITransactionJoin::JoinTransaction returned 0x8004d01c].
It looks like remote server is not available inside the local transaction. How to handle that?
Thanks
ZYT
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Jan 15, 2007
hi:
I try to create full text for new created tables.
Since all new created tables will have same columns with different table name.
After I run the stored procedure to create table, after i got the new table name, I would like to create full-text on that table in the DDL triger.
But I got error like this:
CREATE FULLTEXT CATALOG statement cannot be used inside a user transaction.
Any one has idea how to deal with it?
Thanks
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Nov 29, 2005
I use the context connection for the "normal" work in the CLR procedure.
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Jan 15, 2007
I cannot manage to fetch the new timestamp value inside a TSQL Transaction. I have tried to Select "@LastChanged" before committing the transaction and after committing the transaction. A TimestampCheck variable is used to get the timestamp value of the Custom Business Object. It is checked against the row updating to see if they match. If they do, the Update begins as a Transaction. I send @LastChanged (timestamp) and an InputOutput param, But I also have the same problem sending in a dedicated timestamp param ("@NewLastChanged"): 1 select @TimestampCheck = LastChanged from ADD_Address where AddressId=@AddressId
2
3 if @TimestampCheck is null
4 begin
5 RAISERROR ('AddressId does not exist in ADD_Address: E002', 16, 1) -- AddressId does not exist.
6 return -1
7 end
8 else if @TimestampCheck <> @LastChanged
9 begin
10 RAISERROR ('Timestamps do not match up, the record has been changed: E003', 16, 1)
11 return -1
12 end
13
14
15 Begin Tran Address
16
17 Update ADD_Address
18 set StreetNumber= @StreetNumber, AddressLine1=@AddressLine1, StreetTypeId=@StreetTypeId, AddressLine2=@AddressLine2, AddressLine3=@AddressLine3, CityId=@CityId, StateProvidenceId=@StateProvidenceId, ZipCode=@ZipCode, CreateId=@CreateId, CreateDate=@CreateDate
19 where AddressId= @AddressId
20
21 select @error_code = @@ERROR, @AddressId= scope_identity()
22
23 if @error_code = 0
24 begin
25 commit tran Address
26
27 select @LastChanged = LastChanged
28 from ADD_Address
29 where AddressId = @AddressId
30
31 if @LastChanged is null
32 begin
33 RAISERROR ('LastChanged has returned null in ADD_Address: E004', 16, 1)
34 return -1
35 end
36 if @LastChanged = @TimestampCheck
37 begin
38 RAISERROR ('LastChanged original value has not changed in ADD_Address: E005', 16, 1)
39 return -1
40 end
41 return 0I do not have this problem if I do not use a TSQL Transaction. Is there a way to capture the new timestamp inside a Transaction, or have I missed something?Thank you,jspurlin
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Sep 18, 2015
I am getting an error about "Cannot perform a shrinkfile operation inside a user transaction", but I don't have a shrinkfile command in my procedure. Does SQL hang on to that command if it was received earlier in a different procedure?
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Jun 1, 2006
I've created an SSIS package that contains a Sequence Container with TransactionOption = Required. Within the container, there are a number of Execute Package Task components running in a serial fashion which are responsible for performing "Upserts" to dimension and fact tables on our production server. The destination db configuration is loaded into each of these packages using an XML configuration file. The structure of these "Upsert" packages are nearly identical, while some execute correctly and others fail. Those that fail all provide the same error messages.
These messages appear during Pre-Execute
[Insert new dimension record [1627]] Error: The AcquireConnection method call to the connection manager "DW" failed with error code 0xC0202009.
[DTS.Pipeline] Error: component "Insert new dimension record" (1627) failed the pre-execute phase and returned error code 0xC020801C.
... which are followed by
[Connection manager "DW"] Error: The SSIS Runtime has failed to enlist the OLE DB connection in a distributed transaction with error 0x8004D00A "Unable to enlist in the transaction.".
[Connection manager "DW"] Error: An OLE DB error has occurred. Error code: 0x8004D00A.
While still in debug mode, I can check the properties of the "DW" connection and successfully test the connection within the packages that fail.
The same packages run successfully when tested outside the container (i.e. no transaction) or when the configuration file is modified to point the "DW" connection to a development version of the db which is running on the same server as the source database.
I have successfully used DTCtester to verify that transactions from source to destination server are working correctly. Also tried setting DelayValidation = True with no change. I have opened a case with Microsoft and am awaiting a reply so I thought I'd throw a post out here to see if anyone else has encountered this and might have a resolution. Here's some more on the environment:
Source Server:
Windows Server 2003 Enterprise Edition SP1
SQL Server 2005 Enterprise Edition SP0
Destination Server:
Windows Server 2003 Enterprise Edition SP1
SQL Server 2000 Enterprise Edition SP3 (clustered)
Thank you in advance for any feedback you might be able to provide.
KS
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Aug 4, 2001
Is it possible to do the following?
Begin Transaction
Insert into some table
select @@identity as someid
insert into relatedtables(forgeignkey) values(someid)
Commit
Or does SQL not know the value of @@IDentity until the actual transaction commits, thus not allowing the select @@identity as someid?
How does one circumvent this issue
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Jan 3, 2006
I am having some problems wit a form where i need to insert a record into a table and then get the id of the record i just inserted and use it to insert a record in another table for a many to many relationship. The code is below (I cut out as much as i could to make it more readable).
The erro message i get is this:
Error saving file ATLPIXOFC.txt Reason: System.Data.SqlClient.SqlException: Prepared statement '(@FileName varchar(13),@ i' expects parameter @FileID, which was not supplied. at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe) at System.Data.SqlClient.SqlCommand.ExecuteNonQuery() at Microvit_Document_Product_Document_Add_v2.insertDocumentToDB() in e:inetpubwwwrootMicrovitDocumentProduct_Document_Add_v2.aspx.vb:line 127 at Microvit_Document_Product_Document_Add_v2.btnInsert_Click(Object sender, EventArgs e) in e:inetpubwwwrootMicrovitDocumentProduct_Document_Add_v2.aspx.vb:line 37
Protected Sub insertDocumentToDB()
Dim myConnString As String = ConfigurationManager.ConnectionStrings("Master_DataConnectionString").ConnectionString
Dim myConnection As System.Data.IDbConnection = New System.Data.SqlClient.SqlConnection(myConnString)
Dim myCommand As System.Data.IDbCommand = New System.Data.SqlClient.SqlCommand
Dim myTransaction As System.Data.IDbTransaction = Nothing
myCommand.Connection = myConnection
myCommand.Parameters.Add(New SqlParameter("@FileName", SqlDbType.VarChar))
myCommand.Parameters.Add(New SqlParameter("@ProductID", SqlDbType.Int))
myCommand.Parameters.Add(New SqlParameter("@FileID", SqlDbType.Int, ParameterDirection.Output))
myCommand.Parameters("@FileName").Value = fuDocument.FileName
myCommand.Parameters("@ProductID").Value = ddlProduct.SelectedValue
Try
'****************************************************************************
' BeginTransaction() Requires Open Connection
'****************************************************************************
myConnection.Open()
myTransaction = myConnection.BeginTransaction()
'****************************************************************************
' Assign Transaction to Command
'****************************************************************************
myCommand.Transaction = myTransaction
'****************************************************************************
' Execute 1st Command
'****************************************************************************
myCommand.CommandText = "INSERT INTO [Files] ([FileName) VALUES (@FileName); SELECT @FileID = @@Identity;"
myCommand.ExecuteNonQuery()
'****************************************************************************
' Execute 2nd Command
'****************************************************************************
'myCommand.Parameters("@FileID").Value = ddlProduct.SelectedValue
myCommand.CommandText = "INSERT INTO [ProductFiles] ([ProductID], [FileID]) VALUES (@ProductID, @FileID)"
myCommand.ExecuteNonQuery()
myTransaction.Commit()
Catch
myTransaction.Rollback()
Throw
Finally
myConnection.Close()
End Try
End Sub
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Apr 3, 2001
One of the kernel components of our application(s) is the concept of using surrogate keys (aka system assigned keys [SAKs]) for significant tables. We chose early on not to use IDENTITY due to limitations of cross-DBMS compatibility and @@identity retrieval issues relating to trigger value resets.
We are now in the process of reengineering our own "System Counter" scheme. Our current scheme runs in the user's transaction space (not using an identity column, but a separate "counters" table) -- we're running into performance problems in high concurrency situations as the counters table is holding locks for the duration of a user's transaction (e.g. if the insert trigger on one row's insert inserts rows into a log table which must fetch counters first, the counter rows are locked until the original insert is committed).
Our best performing solution currently is using an extended SP which opens its own connection, gets the counter then closes the connection (running quick this way, running in its own transaction space, it doesn't cause concurrency blocks from the longer running outer user transaction). It appears to work very well (with "pooled connections" its taking appx. 2ms to run) and is easy to use (e.g. a "black box solution"). However we're still considering using IDENTITY to avoid the extra DB connections that are taken up from the middle-tier solution.
Does anyone have experiences working with this topic, that you could share?
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Sep 12, 2007
For inserting current date and time into the database, is it more efficient and performant and faster to do getDate() inside SQL Server and insert the value
OR
to do System.DateTime.Now in the application and then insert it in the table?
I figure even small differences would be magnified if there is moderate traffic, so every little bit helps.
Thanks.
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Nov 16, 2007
I'm trying to execute a stored procedure within the case clause of select statement.
The stored procedure returns a table, and is pretty big and complex, and I don't particularly want to copy the whole thing over to work here. I'm looking for something more elegant.
@val1 and @val2 are passed in
CREATE TABLE #TEMP(
tempid INT IDENTITY (1,1) NOT NULL,
myint INT NOT NULL,
mybool BIT NOT NULL
)
INSERT INTO #TEMP (myint, mybool)
SELECT my_int_from_tbl,
CASE WHEN @val1 IN (SELECT val1 FROM (EXEC dbo.my_stored_procedure my_int_from_tbl, my_param)) THEN 1 ELSE 0
FROM dbo.tbl
WHERE tbl.val2 = @val2
SELECT COUNT(*) FROM #TEMP WHERE mybool = 1
If I have to, I can do a while loop and populate another temp table for every "my_int_from_tbl," but I don't really know the syntax for that.
Any suggestions?
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May 26, 2008
Just wonder whether is there any indicator or system parameters that can indicate whether stored procedure A is executed inside query analyzer or executed inside application itself so that if execution is done inside query analyzer then i can block it from being executed/retrieve sensitive data from it?
What i'm want to do is to block someone executing stored procedure using query analyzer and retrieve its sensitive results.
Stored procedure A has been granted execution for public user but inside application, it will prompt access denied message if particular user has no rights to use system although knew public user name and password. Because there is second layer of user validation inside system application.
However inside query analyzer, there is no way control execution of stored procedure A it as user knew the public user name and password.
Looking forward for replies from expert here. Thanks in advance.
Note: Hope my explaination here clearly describe my current problems.
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May 31, 2008
Hi All
I'm getting this when executing the code below. Going from W2K/SQL2k SP4 to XP/SQL2k SP4 over a dial-up link.
If I take away the begin tran and commit it works, but of course, if one statement fails I want a rollback. I'm executing this from a Delphi app, but I get the same from Qry Analyser.
I've tried both with and without the Set XACT . . ., and also tried with Set Implicit_Transactions off.
set XACT_ABORT ON
Begin distributed Tran
update OPENDATASOURCE('SQLOLEDB','Data Source=10.10.10.171;User ID=*****;Password=****').TRANSFERSTN.TSADMIN.TRANSACTIONMAIN
set REPFLAG = 0 where REPFLAG = 1
update TSADMIN.TRANSACTIONMAIN
set REPFLAG = 0 where REPFLAG = 1 and DONE = 1
update OPENDATASOURCE('SQLOLEDB','Data Source=10.10.10.171;User ID=*****;Password=****').TRANSFERSTN.TSADMIN.WBENTRY
set REPFLAG = 0 where REPFLAG = 1
update TSADMIN.WBENTRY
set REPFLAG = 0 where REPFLAG = 1
update OPENDATASOURCE('SQLOLEDB','Data Source=10.10.10.171;User ID=*****;Password=****').TRANSFERSTN.TSADMIN.FIXED
set REPFLAG = 0 where REPFLAG = 1
update TSADMIN.FIXED
set REPFLAG = 0 where REPFLAG = 1
update OPENDATASOURCE('SQLOLEDB','Data Source=10.10.10.171;User ID=*****;Password=****').TRANSFERSTN.TSADMIN.ALTCHARGE
set REPFLAG = 0 where REPFLAG = 1
update TSADMIN.ALTCHARGE
set REPFLAG = 0 where REPFLAG = 1
update OPENDATASOURCE('SQLOLEDB','Data Source=10.10.10.171;User ID=*****;Password=****').TRANSFERSTN.TSADMIN.TSAUDIT
set REPFLAG = 0 where REPFLAG = 1
update TSADMIN.TSAUDIT
set REPFLAG = 0 where REPFLAG = 1
COMMIT TRAN
It's got me stumped, so any ideas gratefully received.Thx
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Feb 22, 2007
I have a design a SSIS Package for ETL Process. In my package i have to read the data from the tables and then insert into the another table of same structure.
for reading the data i have write the Dynamic TSQL based on some condition and based on that it is using 25 different function to populate the data into different 25 column. Tsql returning correct data and is working fine in Enterprise manager. But in my SSIS package it show me time out ERROR.
I have increase and decrease the time to catch the error but it is still there i have tried to set 0 for commandout Properties.
if i'm using the 0 for commandtime out then i'm getting the Distributed transaction completed. Either enlist this session in a new transaction or the NULL transaction.
and
Failed to open a fastload rowset for "[dbo].[P@@#$%$%%%]". Check that the object exists in the database.
Please help me it's very urgent.
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