Created
February 17, 2022 03:58
-
-
Save xcuzalex/500fc5634bf103b94f2bc78de42d80f5 to your computer and use it in GitHub Desktop.
python-kudu
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| import kudu | |
| from kudu.client import Partitioning | |
| from datetime import datetime | |
| # Connect to Kudu master server | |
| client = kudu.connect(host='localhost', port=7051) | |
| # Define a schema for a new table | |
| builder = kudu.schema_builder() | |
| builder.add_column('key').type(kudu.int64).nullable(False).primary_key() | |
| builder.add_column('ts_val', type_=kudu.unixtime_micros, nullable=False, compression='lz4') | |
| schema = builder.build() | |
| # Define partitioning schema | |
| partitioning = Partitioning().add_hash_partitions(column_names=['key'], num_buckets=3) | |
| # Create new table | |
| client.create_table('python-example', schema, partitioning) | |
| # Open a table | |
| table = client.table('python-example') | |
| # Create a new session so that we can apply write operations | |
| session = client.new_session() | |
| # Insert a row | |
| op = table.new_insert({'key': 1, 'ts_val': datetime.utcnow()}) | |
| session.apply(op) | |
| # Upsert a row | |
| op = table.new_upsert({'key': 2, 'ts_val': "2016-01-01T00:00:00.000000"}) | |
| session.apply(op) | |
| # Updating a row | |
| op = table.new_update({'key': 1, 'ts_val': ("2017-01-01", "%Y-%m-%d")}) | |
| session.apply(op) | |
| # Delete a row | |
| op = table.new_delete({'key': 2}) | |
| session.apply(op) | |
| # Flush write operations, if failures occur, capture print them. | |
| try: | |
| session.flush() | |
| except kudu.KuduBadStatus as e: | |
| print(session.get_pending_errors()) | |
| # Create a scanner and add a predicate | |
| scanner = table.scanner() | |
| scanner.add_predicate(table['ts_val'] == datetime(2017, 1, 1)) | |
| scanner.add_predicate(table['user_id'] == 5655945844) | |
| print(result) | |
| # Open Scanner and read all tuples | |
| # Note: This doesn't scale for large scans | |
| result = scanner.open().read_all_tuples() |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment