To connect to PostgreSQL, you can use either a DSN or an ODBC connection string. Both of these methods use the odbcConnect function.

Connect to a DSN

To connect using a DSN:

cnx <- odbcConnect("CData PostgreSQL Sys")

Provide a Driver Connection String

To connect using an ODBC connection string:

cnx <- odbcDriverConnect(connection = "DRIVER={CData ODBC Driver for PostgreSQL};User=postgres;Password=admin;Database=postgres;Server=127.0.0.1;Port=5432")