Fixed bug connecting to databases that are only mounted and not opened

(#294).

Author: anthony-tuininga

doc/src/release_notes.rst

@@ -22,6 +22,8 @@ Thin Mode Changes
 #)  Fixed potential cursor issues when using DRCP.
 #)  Fixed regression when using IAM token authentication
     (`issue 288 <https://github.com/oracle/python-oracledb/issues/288>`__).
+#)  Fixed bug connecting to databases that are only mounted and not opened
+    (`issue 294 <https://github.com/oracle/python-oracledb/issues/294>`__).
 #)  Fixed bug when using DRCP with :ref:`asyncio <asyncio>`.
 #)  Fixed bug in identifying bind variables in SQL statements containing a
     single line comment at the end of the statement.

src/oracledb/impl/thin/messages.pyx

@@ -1574,7 +1574,7 @@ cdef class AuthMessage(Message):
             self.conn_impl._db_name = \
                     self.session_data.get("AUTH_SC_DBUNIQUE_NAME")
             self.conn_impl._max_open_cursors = \
-                    int(self.session_data.get("AUTH_MAX_OPEN_CURSORS"))
+                    int(self.session_data.get("AUTH_MAX_OPEN_CURSORS", 0))
             self.conn_impl._service_name = \
                     self.session_data.get("AUTH_SC_SERVICE_NAME")
             self.conn_impl._instance_name = \