DescribeQuery describes the columns in the qry string, using DBMS_SQL.PARSE + DBMS_SQL.DESCRIBE_COLUMNS2.

GetDSN returns a (command-line defined) connection string.

GetConnection returns a connection - using GetDSN if dsn is empty.

GetRawConnection returns a raw (*ora.Ses) connection - using GetDSN if dsn is empty.

MapToSlice modifies query for map (:paramname) to :%d placeholders + slice of params.

SplitDSN splits the username/password@sid string to its parts.