65 lines
2.6 KiB
Python
65 lines
2.6 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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# drcp.py
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#
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# Demonstrates the use of Database Resident Connection Pooling (DRCP) which
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# provides a connection pool in the database server, thereby reducing the cost
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# of creating and tearing down client connections. The pool can be started and
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# stopped in the database by issuing the following commands in SQL*Plus:
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#
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# exec dbms_connection_pool.start_pool()
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# exec dbms_connection_pool.stop_pool()
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#
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# Statistics regarding the pool can be acquired from the following query:
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#
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# select * from v$cpool_cc_stats;
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#
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# There is no difference in how a connection is used once it has been
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# established.
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#
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# DRCP has most benefit when used in conjunction with a local connection pool,
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# see the python-oracledb documentation.
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#------------------------------------------------------------------------------
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import oracledb
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import sample_env
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# determine whether to use python-oracledb thin mode or thick mode
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if not sample_env.get_is_thin():
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oracledb.init_oracle_client(lib_dir=sample_env.get_oracle_client())
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conn = oracledb.connect(sample_env.get_drcp_connect_string(),
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cclass="PYCLASS", purity=oracledb.ATTR_PURITY_SELF)
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cursor = conn.cursor()
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print("Performing query using DRCP...")
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for row in cursor.execute("select * from TestNumbers order by IntCol"):
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print(row)
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