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plsql_rowtype_async.py
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120 lines (98 loc) · 3.77 KB
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# -----------------------------------------------------------------------------
# Copyright (c) 2024, 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.
# -----------------------------------------------------------------------------
# -----------------------------------------------------------------------------
# plsql_rowtype_async.py
#
# An asynchronous version of plsql_rowtype.py
#
# Demonstrates how to use a PL/SQL %ROWTYPE attribute
# -----------------------------------------------------------------------------
import asyncio
import oracledb
import sample_env
async def main():
connection = await oracledb.connect_async(
user=sample_env.get_main_user(),
password=sample_env.get_main_password(),
dsn=sample_env.get_connect_string(),
params=sample_env.get_connect_params(),
)
with connection.cursor() as cursor:
await cursor.execute(
"""
begin
begin
execute immediate 'drop table RTSampleTable';
exception
when others then
if sqlcode <> -942 then
raise;
end if;
end;
execute immediate 'create table RTSampleTable (
city varchar2(10))';
execute immediate
'insert into RTSampleTable values (''London'')';
commit;
end;
"""
)
await cursor.execute(
"""
create or replace function TestFuncOUT return RTSampleTable%rowtype
as
r RTSampleTable%rowtype;
begin
select * into r from RTSampleTable where rownum < 2 order by 1;
return r;
end;"""
)
if cursor.warning:
print(cursor.warning)
await cursor.execute(
"""
create or replace procedure TestProcIN(
r in RTSampleTable%rowtype, city out varchar2) as
begin
city := r.city;
end;"""
)
if cursor.warning:
print(cursor.warning)
# Getting a %ROWTYPE from PL/SQL returns a python-oracledb DbObject
# record
rt = await connection.gettype("RTSAMPLETABLE%ROWTYPE")
r = await cursor.callfunc("TESTFUNCOUT", rt)
print("1. City is:", r.CITY)
# dump_object(r) # This is defined in object_dump.py
# An equivalent record can be directly constructed
obj = rt.newobject()
obj.CITY = "My Town"
# Passing a record to a %ROWTYPE parameter
c = cursor.var(oracledb.DB_TYPE_VARCHAR)
await cursor.callproc("TESTPROCIN", [r, c])
print("2. City is:", c.getvalue())
await cursor.callproc("TESTPROCIN", [obj, c])
print("3. City is:", c.getvalue())
asyncio.run(main())