title: Is there PostgreSQL analogue of CHANGE_TRACKING_CURRENT_VERSION (T-SQL)?
body: <p>I'm trying to convert some SQL Server stored procedure in a PostgreSQL procedure, but I didn't find PostgreSQL analogue of <code>CHANGE_TRACKING_CURRENT_VERSION</code> (T-SQL). Is it possible to retrieve a value that is associated with the last committed transaction? I will use this value as a synchronization parameter. I will pass this synchronization parameter and table name to the procedure and will compare it with a current change tracking value. If they are different it means that the table was modified and I can do something with modified rows.</p>