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#------------------------------------------------------------------------------

# ShardingNumberKey.py

# This script demonstrates how to use sharding keys with a sharded database.

# The sample schema provided does not include support for running this demo. A

# sharded database must first be created. Information on how to create a

# sharded database can be found in the documentation:

# https://www.oracle.com/pls/topic/lookup?ctx=dblatest&id=SHARD

# This script requires cx_Oracle 6.1 and higher but it is recommended to use

# cx_Oracle 7.3 and higher in order to avoid a set of known issues when using

# sharding capabilities.

#------------------------------------------------------------------------------

import cx_Oracle

import sample_env

pool = cx_Oracle.SessionPool(user=sample_env.get_main_user(),

password=sample_env.get_main_password(),

dsn=sample_env.get_connect_string(), min=1, max=5,

increment=1)

def connect_and_display(sharding_key):

print("Connecting with sharding key:", sharding_key)

with pool.acquire(shardingkey=[sharding_key]) as conn:

cursor = conn.cursor()

cursor.execute("select sys_context('userenv', 'db_name') from dual")

name, = cursor.fetchone()

print("--> connected to database", name)

connect_and_display(100)

connect_and_display(167)

Sunbelt Computer Software