Postgres Linked Server How To

Rhys — Sat, 30 Jan 2010 16:44:07 +0000

Just a quick post showing how to add a Postgres database server as a Linked Server in Microsoft SQL Server.

Install the psqlODBC driver for Windows.
Control Panel > Administrative Tools > Data Sources (ODBC).
Click the "System DSN" tab and click the Add button.

Choose "PostreSQL ANSI" and click Finish.
Configure the data source by entering the server, username, password and database details.

Click "Test" to confirm the data source functions. If it fails ensure that Postgres is running and check your configuration details.
Click "Save" and then "OK" once successful.
Fire up SSMS and run the following T-SQL to create the Linked Server to Postgres.

USE [master]
GO
EXEC master.dbo.sp_addlinkedserver @server = N'POSTGRES', @srvproduct=N'Postgres', @provider=N'MSDASQL', @datasrc=N'PostgreSQL30'
 
GO
EXEC master.dbo.sp_serveroption @server=N'POSTGRES', @optname=N'collation compatible', @optvalue=N'false'
GO
EXEC master.dbo.sp_serveroption @server=N'POSTGRES', @optname=N'data access', @optvalue=N'true'
GO
EXEC master.dbo.sp_serveroption @server=N'POSTGRES', @optname=N'rpc', @optvalue=N'false'
GO
EXEC master.dbo.sp_serveroption @server=N'POSTGRES', @optname=N'rpc out', @optvalue=N'false'
GO
EXEC master.dbo.sp_serveroption @server=N'POSTGRES', @optname=N'connect timeout', @optvalue=N'0'
GO
EXEC master.dbo.sp_serveroption @server=N'POSTGRES', @optname=N'collation name', @optvalue=null
GO
EXEC master.dbo.sp_serveroption @server=N'POSTGRES', @optname=N'query timeout', @optvalue=N'0'
GO
EXEC master.dbo.sp_serveroption @server=N'POSTGRES', @optname=N'use remote collation', @optvalue=N'true'
GO
USE [master]
GO
EXEC master.dbo.sp_addlinkedsrvlogin @rmtsrvname = N'POSTGRES', @locallogin = NULL , @useself = N'False'
GO

Alternatively copy the below configuration in SSMS. The most critical thing here is to get the setting for "Data source" correct. This should be the name of the System DSN you added earlier.

Finally execute the query below. This uses OPENQUERY and will list all the tables in your Postgres system database.

^?View Code TSQL

SELECT *
FROM OPENQUERY(POSTGRES, 'SELECT * FROM INFORMATION_SCHEMA.TABLES');

If everything is running correctly you should see something like below.

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Postgres Linked Server How To

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Postgres Linked Server How To