40 lines
1.3 KiB
Python
40 lines
1.3 KiB
Python
#------------------------------------------------------------------------------
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# subclass.py (Section 9.2)
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#------------------------------------------------------------------------------
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#------------------------------------------------------------------------------
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# Copyright (c) 2017, 2021, Oracle and/or its affiliates. All rights reserved.
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#------------------------------------------------------------------------------
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import cx_Oracle
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import db_config
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class MyConnection(cx_Oracle.Connection):
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def __init__(self):
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print("Connecting to database")
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return super(MyConnection, self).__init__(db_config.user, db_config.pw, db_config.dsn)
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def cursor(self):
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return MyCursor(self)
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class MyCursor(cx_Oracle.Cursor):
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def execute(self, statement, args):
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print("Executing:", statement)
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print("Arguments:")
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for argIndex, arg in enumerate(args):
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print(" Bind", argIndex + 1, "has value", repr(arg))
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return super(MyCursor, self).execute(statement, args)
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def fetchone(self):
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print("Fetchone()")
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return super(MyCursor, self).fetchone()
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con = MyConnection()
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cur = con.cursor()
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cur.execute("select count(*) from emp where deptno = :bv", (10,))
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count, = cur.fetchone()
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print("Number of rows:", count)
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