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Prevent a SAS Session from Connecting to a SQL Database Until Required

If your SAS environment regularly interacts with SQL databases via ODBC/OLE DB pre-assigned libraries, a common complaint may arise from your SQL DBA team.  By default, when a SAS user connects to a SAS session (such as Enterprise Guide), an attempt will be made to connect that user to each ODBC/OLE DB pre-assigned library.

This behaviour can have the following impact:


  • SAS sessions can take longer to connect if there are many ODBC/OLE DB pre-assigned libraries to connect to.
  • Additional entries within SAS logs, potentially producing unhelpful errors, if a user does not have valid credentials to connect to the SQL databases associated with those libraries.


  • Unnecessary SQL database connections made.
  • Unhelpful warnings/errors detailing SAS users' failed database connection attempts, if a user does not have valid credentials to connect to a SQL database associated with a pre-assigned library.
  • Excess noise generated within DBA teams monitoring processes and logs, detailing repeated successful/failed database connection attempts for each SAS user who starts a SAS session.

There is an option which can be applied to each SAS library, which will prevent a database connection attempt being made, until there is a need for a connection to that database to be established. 

The following steps detail setting this option:

  • Open SAS Management Console and log in as an Administrator
  • Within the left-hand pane, click on the Plug-ins tab
  • Expand Data Library Manager
  • Expand Libraries
  • Right click on the SQL Database library and click Properties

Prevent a SAS session image1

The Properties windows will now appear...

  • Select the Options tab and select the Advanced Options button

The Advanced Properties window will now appear…

  • Click on the Connection tab
  • Locate the option Whether to defer a connection until needed and change the drop-down option to Yes.

Prevent a SAS session image2

  • Click the OK button to accept the change.