Starting and Stopping Oracle Database

This chapter covers how to start up and shutdown Oracle Database using cx_Oracle.

Starting Oracle Database Up

cx_Oracle can start up a database instance. A privileged connection is required. This example shows a script that could be run as the ‘oracle’ operating system user who administers a local database installation on Linux. It assumes that the environment variable ORACLE_SID has been set to the SID of the database that should be started:

# the connection must be in PRELIM_AUTH mode to perform startup
connection = cx_Oracle.connect("/",
        mode = cx_Oracle.SYSDBA | cx_Oracle.PRELIM_AUTH)

# the following statements must be issued in normal SYSDBA mode
connection = cx_Oracle.connect("/", mode = cx_Oracle.SYSDBA, encoding="UTF-8")
cursor = connection.cursor()
cursor.execute("alter database mount")
cursor.execute("alter database open")

To start up a remote database, you may need to configure the Oracle Net listener to use static service registration by adding a SID_LIST_LISTENER entry to the database listener.ora file.

Shutting Oracle Database Down

cx_Oracle has the ability to shutdown the database using a privileged connection. This example also assumes that the environment variable ORACLE_SID has been set:

# need to connect as SYSDBA or SYSOPER
connection = cx_Oracle.connect("/", mode = cx_Oracle.SYSDBA)

# first shutdown() call must specify the mode, if DBSHUTDOWN_ABORT is used,
# there is no need for any of the other steps
connection.shutdown(mode = cx_Oracle.DBSHUTDOWN_IMMEDIATE)

# now close and dismount the database
cursor = connection.cursor()
cursor.execute("alter database close normal")
cursor.execute("alter database dismount")

# perform the final shutdown call
connection.shutdown(mode = cx_Oracle.DBSHUTDOWN_FINAL)