Package godror is a database/sql/driver for Oracle DB. The connection string for the sql.Open("godror", dataSourceName) call can be the simple with additional params (here with the defaults): These are the defaults. For external authentication, user and password should be empty with default value(0) for heterogeneousPool parameter. heterogeneousPool(valid for standaloneConnection=0) and externalAuth parameters are internally set. For Proxy support , sessionuser is enclosed in brackets [sessionuser]. To use a heterogeneous Pool with Proxy Support ,user and password parameters should be non-empty and parameter heterogeneousPool should be 1. If user,password are empty and heterogeneousPool is set to 1, different user and password can be passed in subsequent queries. Many advocate that a static session pool (min=max, incr=0) is better, with 1-10 sessions per CPU thread. See https://www.oracle.com/pls/topic/lookup?ctx=dblatest&id=GUID-7DFBA826-7CC0-4D16-B19C-31D168069B54 You may also use ConnectionParams to configure a connection. If you specify connectionClass, that'll reuse the same session pool without the connectionClass, but will specify it on each session acquire. Thus you can cluster the session pool with classes. For connectionClass usage, see https://www.oracle.com/pls/topic/lookup?ctx=dblatest&id=GUID-CE6E4DCC-92DF-4946-92B8-2BDD9845DA35 If you specify server_type as POOLED in sid, DRCP is used. For what can be used as "sid", see https://www.oracle.com/pls/topic/lookup?ctx=dblatest&id=GUID-E5358DEA-D619-4B7B-A799-3D2F802500F1 Go strings are UTF-8, so the default charset should be used unless there's a really good reason to interfere with Oracle's character set conversion.