While I am a general Linux admin, I have never administered or used PostgreSQL, although I do admin a few MySQL instances. I have just been told that a system currently hosted on SQL Server 2008 ...

Babelfish enables PostgreSQL to understand database requests—both the command and the protocol—from applications written for Microsoft SQL Server without changing libraries, database schema ...

Babelfish for Aurora PostgreSQL also understands SQL Server’s network protocol, so customers can continue using their existing SQL Server database drivers.