Importing Data from Oracle 10g to Sql Server 2005 using Linked Server

Hi,

I am using Windows 2003 server and Sqlserver 2005 by the use of Linked server , I made a connection to Oracle 10g after that I am importing records from Oracle to sqlserver 2005. When I made tnsnames.ora in sql machine , it worked fine but when i am using tnsnames file from oracle server then i fiired importing procedure it returns below maintain error :

OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS" returned message "Unspecified error".

OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS" returned message "Oracle error occurred, but error message could not be retrieved from Oracle.".

Msg 7311, Level 16, State 2, Line 1

Cannot obtain the schema rowset "DBSCHEMA_TABLES" for OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS". The provider supports the interface, but returns a failure code when it is used.

Please let me know.

Thanks

MSDAORA does not support 10g, have a look at INFO: Limitations of Microsoft Oracle ODBC Driver and OLEDB Provider
Try using OraOLEDB.Oracle instead.|||

Hi Anton,

Thanks for speedy reply.

Anton in my procedure if I remove transaction(Begin Tran, Commit, Rollback) then this procedure is working fine, but removal of it not possible, so it is not related with provider, I hope.

If I put tranaction it shows above maintain error.

Thanks

|||Is there any reason you cannot try Oracle's provider?|||

Hi Anton,

I am using OLEDB.ORACLE but it is not allowing me to make new Linked server.

It shows me this error:

TITLE: Microsoft SQL Server Management Studio

"The linked server has been created but failed a connection test. Do you want to keep the linked server?"

ADDITIONAL INFORMATION:

An exception occurred while executing a Transact-SQL statement or batch. (Microsoft.SqlServer.ConnectionInfo)

The OLE DB provider "OraOLEDB.Oracle" for linked server "AA" reported an error. The provider did not give any information about the error.
Cannot initialize the data source object of OLE DB provider "OraOLEDB.Oracle" for linked server "AA". (Microsoft SQL Server, Error: 7399)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&ProdVer=09.00.3042&EvtSrc=MSSQLServer&EvtID=7399&LinkId=20476

BUTTONS:

&Yes
&No

|||Have you enabled AllowInProcess option in the provider options?|||

Hi Anton,

Yes, I did but it returns another error:

OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS" returned message "ORA-12154: TNS:could not resolve the connect identifier specified
".
Msg 7303, Level 16, State 1, Procedure PROC_VLD_BI_TRANSFER, Line 36
Cannot initialize the data source object of OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS".

|||But MSDAORA is not an Oracle's provider. Did you try it for the OraOLEDB?|||

Hi Anton,

Yes, I did

But it is not allowing me to make a new linked Server.

Presently I am facing this problem:

OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS" returned message "ORA-12154: TNS:could not resolve the connect identifier specified
".
Msg 7303, Level 16, State 1, Procedure PROC_VLD_BI_TRANSFER, Line 36
Cannot initialize the data source object of OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS".

|||

Hi Anton,

Now I solved ORA-12154 Error but when I enabled "Allow InProcess" this gives ORA-12154 Error again.

After disable this option, I can connect Oracle server successfully but when I used to fire my procedure that is used to import records from oracle 10g to sqlserver 2005 using linked server.

It Shows me this error:

Msg 7399, Level 16, State 1, Line 1
The OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS" reported an error. The provider did not give any information about the error.
Msg 7391, Level 16, State 2, Line 1
The operation could not be performed because OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS" was unable to begin a distributed transaction.

Thanks for your nice support.

|||http://support.microsoft.com/kb/306212
http://support.microsoft.com/kb/816701|||

Hi Anton,

I got 2 kind of error:

checked "Allow inprocess" in the provider options, then it Error:

OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS" returned message "ORA-12154: TNS:could not resolve the connect identifier specified
".
Msg 7303, Level 16, State 1, Line 1
Cannot initialize the data source object of OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS".

If NOT CHECKED then Error:

OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS" returned message "Unspecified error".
OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS" returned message "Oracle error occurred, but error message could not be retrieved from Oracle.".
Msg 7311, Level 16, State 2, Line 1
Cannot obtain the schema rowset "DBSCHEMA_TABLES" for OLE DB provider "MSDAORA" for linked server "BI_ORACLE_LS". The provider supports the interface, but returns a failure code when it is used.

I used later one because by this i can access records from oracle but when i used this linked server in my Procedure using transaction then this error is reflected.

I find out a link of support.microsoft.com/kb/906954 but it can not make me out from this trouble.

Please advise me the solution.

Thanks for your support.

Importing data from one source in two destination tables linked by a foreign key

Hi,

I have a new problem when I import data from an xml source file in two destination tables. The two tables are linked by a foreign key... for example :

table MOTHER (MOTHER_ID, MOTHER_NAME)

table CHILD (CHILD_ID, MOTHER_ID, MOTHER_NAME)

After a lot of transformations data are inserted into MOTHER table and I want to insert other fields of the data flow in CHILD table. To do this, I need the MOTHER_ID field that is auto incremented in MOTHER table.

My problem is to chain the insertion in CHILD table after the insertion in MOTHER table to be sure that the relative row in MOTHER table is really inserted. I haven't find any solution to chain another transformation task after my flow destination "Insert into MOTHER table".

The only solution I have found is to create a new flow control to insert data in CHILD table, using a lookup transformation task to bind with MOTHER table... But with this solution all my flow control transforms are made two times...

Is there a solution to chain two insertions with a foreign key constraint in a data flow?

Thanks

Regards,

Arnaud Gervais.

Just create two data flows in your control flow. The first to load the mother table. The second to then load the child table.|||

I can do that but I have a unique source file and with this solution I have to do same transformations of my data 2 times...

I've found a better solution that seems to be often used: http://blogs.conchango.com/jamiethomson/archive/2006/05/22/3974.aspx

It consists on creating two data flow and chaining them on the control flow as following:

- first data flow : I transform data, insert them in the mother table and keep the data flow in a raw file using multicast component.

- second data flow : I read the raw file to get transformed data, and find the foreign key with a lookup component bound to mother table previously imported.

It seems to be the best and fastest solution to do that...

Thanks,

Arnaud.

|||

it sounds like you are talking about the same thing at this thread

http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=918028&SiteID=1

Jamie Thomson has posted feedback asking for "Intrinsic Flow Priority" to be included in SSIS. This would mean you could achieve what you are trying to do in a single data flow task.

Please go to (https://connect.microsoft.com/SQLServer/feedback/ViewFeedback.aspx?FeedbackID=178058) and vote for this as well as posting your use case.