clob_string.py

# -----------------------------------------------------------------------------
# clob_string.py (Section 7.2)
# -----------------------------------------------------------------------------

# -----------------------------------------------------------------------------
# Copyright (c) 2017, 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.
# -----------------------------------------------------------------------------

import oracledb
import db_config

oracledb.defaults.fetch_lobs = False

con = oracledb.connect(
    user=db_config.user, password=db_config.pw, dsn=db_config.dsn
)
cur = con.cursor()

print("Inserting data...")
cur.execute("truncate table testclobs")
long_string = ""
for i in range(5):
    char = chr(ord("A") + i)
    long_string += char * 250
    cur.execute(
        "insert into testclobs values (:1, :2)",
        (i + 1, "String data " + long_string + " End of string"),
    )
con.commit()

print("Querying data...")
cur.execute("select * from testclobs where id = :id", {"id": 1})
(id, clobdata) = cur.fetchone()
print("CLOB length:", len(clobdata))
print("CLOB data:", clobdata)