Grant users permission to execute Python and R scripts with SQL Server Machine Learning Services

Applies to: yesSQL Server (all supported versions)

Learn how you can give users permission to run external Python and R scripts in SQL Server Machine Learning Services and give read, write, or data definition language (DDL) permissions to databases.

For more information, see the permissions section in Security overview for the extensibility framework.

Permission to run scripts

For each user who runs Python or R scripts with SQL Server Machine Learning Services, and who are not an administrator, you must grant them the permission to run external scripts in each database where the language is used.

To grant permission to execute external script, run the following script:

USE <database_name>


Permissions are not specific to the supported script language. In other words, there are not separate permission levels for R script versus Python script.

Grant databases permissions

While a user is running scripts, the user might need to read data from other databases. The user might also need to create new tables to store results, and write data into tables.

For each Windows user account or SQL login that is running R or Python scripts, ensure that it has the appropriate permissions on the specific database:

  • db_datareader to read data.
  • db_datawriter to save objects to the database.
  • db_ddladmin to create objects such as stored procedures or tables containing trained and serialized data.

For example, the following Transact-SQL statement gives the SQL login MySQLLogin the rights to run T-SQL queries in the ML_Samples database. To run this statement, the SQL login must already exist in the security context of the server.

USE ML_Samples
EXEC sp_addrolemember 'db_datareader', 'MySQLLogin'

Next steps

For more information about the permissions included in each role, see Database-level roles.