75 lines
2.8 KiB
Python
75 lines
2.8 KiB
Python
#------------------------------------------------------------------------------
|
|
# Copyright (c) 2016, 2023, 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.
|
|
#------------------------------------------------------------------------------
|
|
|
|
#------------------------------------------------------------------------------
|
|
# generic_row_factory.py
|
|
#
|
|
# Demonstrates the ability to return named tuples for all queries using a
|
|
# subclassed cursor and row factory.
|
|
#------------------------------------------------------------------------------
|
|
|
|
import collections
|
|
|
|
import oracledb
|
|
import sample_env
|
|
|
|
# determine whether to use python-oracledb thin mode or thick mode
|
|
if not sample_env.get_is_thin():
|
|
oracledb.init_oracle_client(lib_dir=sample_env.get_oracle_client())
|
|
|
|
class Connection(oracledb.Connection):
|
|
|
|
def cursor(self):
|
|
return Cursor(self)
|
|
|
|
|
|
class Cursor(oracledb.Cursor):
|
|
|
|
def execute(self, statement, args=None):
|
|
prepare_needed = (self.statement != statement)
|
|
result = super().execute(statement, args or [])
|
|
if prepare_needed:
|
|
description = self.description
|
|
if description is not None:
|
|
names = [d.name for d in description]
|
|
self.rowfactory = collections.namedtuple("GenericQuery", names)
|
|
return result
|
|
|
|
|
|
# create a new subclassed connection and cursor
|
|
connection = Connection(user=sample_env.get_main_user(),
|
|
password=sample_env.get_main_password(),
|
|
dsn=sample_env.get_connect_string())
|
|
|
|
with connection.cursor() as cursor:
|
|
|
|
# the names are now available directly for each query executed
|
|
for row in cursor.execute("select ParentId, Description from ParentTable"):
|
|
print(row.PARENTID, "->", row.DESCRIPTION)
|
|
print()
|
|
|
|
for row in cursor.execute("select ChildId, Description from ChildTable"):
|
|
print(row.CHILDID, "->", row.DESCRIPTION)
|
|
print()
|