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