61 lines
2.4 KiB
Python
61 lines
2.4 KiB
Python
#------------------------------------------------------------------------------
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# Copyright 2016, 2017, Oracle and/or its affiliates. All rights reserved.
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#
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# Portions Copyright 2007-2015, Anthony Tuininga. All rights reserved.
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#
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# Portions Copyright 2001-2007, Computronix (Canada) Ltd., Edmonton, Alberta,
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# Canada. All rights reserved.
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#------------------------------------------------------------------------------
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#------------------------------------------------------------------------------
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# QueryChangeNotification.py
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# This script demonstrates using query change notification in Python, a
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# feature that is available in Oracle 11g. Once this script is running, use
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# another session to insert, update or delete rows from the table
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# cx_Oracle.TestTempTable and you will see the notification of that change.
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#------------------------------------------------------------------------------
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from __future__ import print_function
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import cx_Oracle
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import threading
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import time
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def callback(message):
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print("Message type:", message.type)
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print("Message database name:", message.dbname)
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print("Message queries:")
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for query in message.queries:
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print("--> Query ID:", query.id)
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print("--> Query Operation:", query.operation)
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for table in query.tables:
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print("--> --> Table Name:", table.name)
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print("--> --> Table Operation:", table.operation)
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if table.rows is not None:
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print("--> --> Table Rows:")
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for row in table.rows:
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print("--> --> --> Row RowId:", row.rowid)
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print("--> --> --> Row Operation:", row.operation)
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print("-" * 60)
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print("=" * 60)
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connection = cx_Oracle.Connection("cx_Oracle/dev@localhost/orcl",
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events = True)
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sub = connection.subscribe(callback = callback, timeout = 1800,
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qos = cx_Oracle.SUBSCR_QOS_QUERY | cx_Oracle.SUBSCR_QOS_ROWIDS)
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print("Subscription:", sub)
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print("--> Connection:", sub.connection)
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print("--> Callback:", sub.callback)
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print("--> Namespace:", sub.namespace)
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print("--> Protocol:", sub.protocol)
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print("--> Timeout:", sub.timeout)
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print("--> Operations:", sub.operations)
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print("--> Rowids?:", bool(sub.qos & cx_Oracle.SUBSCR_QOS_ROWIDS))
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queryId = sub.registerquery("select * from TestTempTable")
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print("Registered query:", queryId)
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while True:
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print("Waiting for notifications....")
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time.sleep(5)
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