99 lines
4.1 KiB
Python
99 lines
4.1 KiB
Python
#------------------------------------------------------------------------------
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# Copyright (c) 2016, 2022, Oracle and/or its affiliates.
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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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# This software is dual-licensed to you under the Universal Permissive License
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# (UPL) 1.0 as shown at https://oss.oracle.com/licenses/upl and Apache License
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# 2.0 as shown at http://www.apache.org/licenses/LICENSE-2.0. You may choose
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# either license.
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#
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# If you elect to accept the software under the Apache License, Version 2.0,
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# the following applies:
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#------------------------------------------------------------------------------
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#------------------------------------------------------------------------------
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# editioning.py
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#
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# Demonstrates the use of Edition-Based Redefinition, a feature that is
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# available in Oracle Database 11.2 and higher. See the Oracle documentation on
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# the subject for additional information. Adjust the contents at the top of the
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# script for your own database as needed.
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#------------------------------------------------------------------------------
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import os
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import oracledb
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import sample_env
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# this script is currently only supported in python-oracledb thick mode
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oracledb.init_oracle_client(lib_dir=sample_env.get_oracle_client())
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# connect to the editions user and create a procedure
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edition_connect_string = sample_env.get_edition_connect_string()
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edition_name = sample_env.get_edition_name()
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connection = oracledb.connect(edition_connect_string)
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print("Edition should be None, actual value is:", repr(connection.edition))
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cursor = connection.cursor()
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cursor.execute("""
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create or replace function TestEditions return varchar2 as
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begin
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return 'Base Procedure';
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end;""")
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result = cursor.callfunc("TestEditions", str)
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print("Function should return 'Base Procedure', actually returns:",
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repr(result))
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# next, change the edition and recreate the procedure in the new edition
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cursor.execute("alter session set edition = %s" % edition_name)
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print("Edition should be", repr(edition_name.upper()),
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"actual value is:", repr(connection.edition))
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cursor.execute("""
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create or replace function TestEditions return varchar2 as
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begin
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return 'Edition 1 Procedure';
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end;""")
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result = cursor.callfunc("TestEditions", str)
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print("Function should return 'Edition 1 Procedure', actually returns:",
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repr(result))
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# next, change the edition back to the base edition and demonstrate that the
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# original function is being called
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cursor.execute("alter session set edition = ORA$BASE")
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result = cursor.callfunc("TestEditions", str)
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print("Function should return 'Base Procedure', actually returns:",
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repr(result))
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# the edition can be set upon connection
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connection = oracledb.connect(edition_connect_string,
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edition=edition_name.upper())
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cursor = connection.cursor()
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result = cursor.callfunc("TestEditions", str)
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print("Function should return 'Edition 1 Procedure', actually returns:",
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repr(result))
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# it can also be set via the environment variable ORA_EDITION
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os.environ["ORA_EDITION"] = edition_name.upper()
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connection = oracledb.connect(edition_connect_string)
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print("Edition should be", repr(edition_name.upper()),
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"actual value is:", repr(connection.edition))
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cursor = connection.cursor()
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result = cursor.callfunc("TestEditions", str)
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print("Function should return 'Edition 1 Procedure', actually returns:",
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repr(result))
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