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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 SampleEnv

pool = cx_Oracle.SessionPool(SampleEnv.GetMainUser(),

SampleEnv.GetMainPassword(), SampleEnv.GetConnectString(), min=1,

max=5, increment=1)

def ConnectAndDisplay(shardingKey):

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

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

cursor = conn.cursor()

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

name, = cursor.fetchone()

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

ConnectAndDisplay(100)

ConnectAndDisplay(167)

Sunbelt Computer Software