Installing SSMA components on SQL Server (OracleToSQL)

In addition to installing SSMA, you must also install components on the computer that is running SQL Server. These components include the SSMA extension pack, which supports data migration, and Oracle providers to enable server-to-server connectivity.

SSMA for Oracle extension pack

The SSMA extension pack deploys extended stored procedures, and adds the sysdb database to the specified instance of SQL Server. Extended stored procedures provide functionality required to emulate features and behavior of Oracle, while the sysdb database contains the tables and stored procedures required to migrate the data.

Also, when you migrate data to SQL Server, SSMA creates SQL Server Agent jobs when the server-side data migration engine is used for migrating the data.


Before you install the SSMA for Oracle server components on SQL Server, make sure that the system meets the following requirements:

  • SQL Server instance is installed.

  • Microsoft Windows Installer 3.1 or a later version.

  • The Microsoft .NET Framework version 4.7.2 or a later version. You can obtain it from the .NET Framework Developer Center.

  • The OLE DB provider for Oracle (if using OLE DB), and connectivity to the Oracle database that you want to migrate. You can install providers from the Oracle product media or Oracle Web site.

  • The SQL Server Browser service must be running during installation. This is used to populate a list of the instances of SQL Server in the Setup wizard. You can disable the SQL Server Browser service after installation.


    If the SQL Server Browser service is running, but you still do not see a list of instances in Setup, you must unblock UDP port 1434. You can use Windows Firewall to temporarily unblock the port, or you can temporarily disable Windows Firewall. You might also have to temporarily disable antivirus software. Make sure to enable firewalls and antivirus software after installation.

Installing the extension pack

You can install the extension pack anytime before you migrate data to SQL Server.


To install the extension pack, you must be a member of the sysadmin server role on the instance of SQL Server.

To install the extension pack:

  1. Copy SSMAforOracleExtensionPack_n.msi (where n is the build number) to the computer that is running SQL Server.

  2. Double-click SSMAforOracleExtensionPack_n.msi.

  3. On the Welcome page, click Next.

  4. On the End-User License Agreement page, read the license agreement. If you agree, select I accept the agreement option, and then click Next.

  5. On the Choose Setup Type page, select Typical.

  6. On the Ready to Install page, select Install.

  7. On the Completed the First Step of Installation page, select Next.

    A new dialog box appears. Select the extension pack type.

  8. Select the desired installation type and, click Next.


    Remote option should only be used when installing extension pack on SQL Server running on Linux or when targeting Azure SQL Managed Instance. SQL Server installations running on Windows should always have extension pack installed locally. Azure SQL Database and Azure Synapse Analytics do not support extension pack.

    If you are installing the extension pack on a local SQL Server instance, then next page will allow you to choose a local instance of SQL Server to which you'll be migrating Oracle schemas. Choose an instance in the drop-down, and then select Next.

    The default instance has the same name as the computer. Named instances will be followed by a backslash and the instance name.

  9. On the connection page, select the authentication method and then select Next.

    Windows Authentication will use your Windows credentials to try to sign in to the instance of SQL Server. If you select Server Authentication, you must enter a SQL Server login name and password.

  10. Next step requires you to set the password for a master key that will be used to encrypt any sensitive data stored in the extension pack database during server-side data migration. Provide a strong password and click Next.

  11. On the next page, select Install Utilities Database n and Install Extension Pack libraries, where n is the version number and click Next.

    The sysdb database is created with the tables and stored procedures required for data migration (using server-side data migration engine) are created in this database.

  12. Once installation is complete, a prompt will appear asking if you want to install Utilities Database on another instance of SQL Server, select Yes, and then select Next, or to exit the wizard, select No and then select Exit.

  13. In SQL Server Management Studio or by using the sqlcmd utility, run the following script to enable CLR:

    sp_configure 'clr enabled', 1

    If CLR isn't enabled, you'll receive the following error when SSMA connects to SQL Server:

    SSMA could not retrieve the extension pack assembly version information. Reinstall the extension pack on the database server.

SQL Server database objects

After you install the extension pack, an ssma_oracle.bcp_migration_packages table appears in the sysdb database.

Every time you migrate data to SQL Server, SSMA creates a SQL Server Agent job. These jobs are named ssma_oracle data migration package {GUID}, and are visible in the SQL Server Agent node of SQL Server Management Studio in the Jobs folder.

Also following extended stored procedures will be added to the master database:

  • xp_ora2ms_exec2
  • xp_ora2ms_exec2_ex
  • xp_ora2ms_versioninfo2

See also