anshikaj1 commented on issue #29271:
URL:
https://github.com/apache/shardingsphere/issues/29271#issuecomment-1868565538
import hashlib
def get_shard_key(data):
# Assuming data is an integer representing the sharding key
return hash(data) % num_shards
def get_shard_connection(shard_key):
# Connect to the database shard based on the shard key
# Replace this with your actual connection logic
shard_url = f"database_shard_{shard_key}.example.com"
return connect_to_database(shard_url)
def get_data_from_sharded_table(sharding_key, table_name):
# Determine which shard the data belongs to
shard_key = get_shard_key(sharding_key)
# Connect to the appropriate shard
connection = get_shard_connection(shard_key)
# Query the table on the specific shard
query = f"SELECT * FROM {table_name} WHERE sharding_key = {sharding_key}"
result = execute_query(connection, query)
# Process the result as needed
process_result(result)
# Close the connection
connection.close()
# Replace these functions with your actual database connection and query
execution logic
def connect_to_database(url):
# Connect to the database and return a connection object
pass
def execute_query(connection, query):
# Execute the query on the provided connection and return the result
pass
def process_result(result):
# Process the query result as needed
pass
# Example usage
sharding_key_to_search = 42
table_name_to_query = "books"
get_data_from_sharded_table(sharding_key_to_search, table_name_to_query)
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