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# ------------------------------------------------------------------------------
# Copyright (c) 2017, 2022, Oracle and/or its affiliates.
#
# This software is dual-licensed to you under the Universal Permissive License
# (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl and Apache License
# 2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose
# either license.
#
# If you elect to accept the software under the Apache License, Version 2.0,
# the following applies:
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ------------------------------------------------------------------------------
# ------------------------------------------------------------------------------
# subclass.py (Section 9.2)
# ------------------------------------------------------------------------------
import oracledb
import db_config
class MyConnection(oracledb.Connection):
def __init__(self):
print("Connecting to database")
return super(MyConnection, self).__init__(user=db_config.user, password=db_config.pw, dsn=db_config.dsn)
def cursor(self):
return MyCursor(self)
class MyCursor(oracledb.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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