Source code for airflow.providers.amazon.aws.hooks.glue_catalog

#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you 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
#
#   http://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.
"""This module contains AWS Glue Catalog Hook"""
from __future__ import annotations

from botocore.exceptions import ClientError

from airflow.exceptions import AirflowException
from airflow.providers.amazon.aws.hooks.base_aws import AwsBaseHook


[docs]class GlueCatalogHook(AwsBaseHook): """ Interact with AWS Glue Catalog Additional arguments (such as ``aws_conn_id``) may be specified and are passed down to the underlying AwsBaseHook. .. seealso:: :class:`~airflow.providers.amazon.aws.hooks.base_aws.AwsBaseHook` """ def __init__(self, *args, **kwargs): super().__init__(client_type="glue", *args, **kwargs)
[docs] def get_partitions( self, database_name: str, table_name: str, expression: str = "", page_size: int | None = None, max_items: int | None = None, ) -> set[tuple]: """ Retrieves the partition values for a table. :param database_name: The name of the catalog database where the partitions reside. :param table_name: The name of the partitions' table. :param expression: An expression filtering the partitions to be returned. Please see official AWS documentation for further information. https://docs.aws.amazon.com/glue/latest/dg/aws-glue-api-catalog-partitions.html#aws-glue-api-catalog-partitions-GetPartitions :param page_size: pagination size :param max_items: maximum items to return :return: set of partition values where each value is a tuple since a partition may be composed of multiple columns. For example: ``{('2018-01-01','1'), ('2018-01-01','2')}`` """ config = { "PageSize": page_size, "MaxItems": max_items, } paginator = self.get_conn().get_paginator("get_partitions") response = paginator.paginate( DatabaseName=database_name, TableName=table_name, Expression=expression, PaginationConfig=config ) partitions = set() for page in response: for partition in page["Partitions"]: partitions.add(tuple(partition["Values"])) return partitions
[docs] def check_for_partition(self, database_name: str, table_name: str, expression: str) -> bool: """ Checks whether a partition exists :param database_name: Name of hive database (schema) @table belongs to :param table_name: Name of hive table @partition belongs to :expression: Expression that matches the partitions to check for (eg `a = 'b' AND c = 'd'`) >>> hook = GlueCatalogHook() >>> t = 'static_babynames_partitioned' >>> hook.check_for_partition('airflow', t, "ds='2015-01-01'") True """ partitions = self.get_partitions(database_name, table_name, expression, max_items=1) return bool(partitions)
[docs] def get_table(self, database_name: str, table_name: str) -> dict: """ Get the information of the table :param database_name: Name of hive database (schema) @table belongs to :param table_name: Name of hive table >>> hook = GlueCatalogHook() >>> r = hook.get_table('db', 'table_foo') >>> r['Name'] = 'table_foo' """ result = self.get_conn().get_table(DatabaseName=database_name, Name=table_name) return result["Table"]
[docs] def get_table_location(self, database_name: str, table_name: str) -> str: """ Get the physical location of the table :param database_name: Name of hive database (schema) @table belongs to :param table_name: Name of hive table :return: str """ table = self.get_table(database_name, table_name) return table["StorageDescriptor"]["Location"]
[docs] def get_partition(self, database_name: str, table_name: str, partition_values: list[str]) -> dict: """ Gets a Partition :param database_name: Database name :param table_name: Database's Table name :param partition_values: List of utf-8 strings that define the partition Please see official AWS documentation for further information. https://docs.aws.amazon.com/glue/latest/dg/aws-glue-api-catalog-partitions.html#aws-glue-api-catalog-partitions-GetPartition :raises: AirflowException >>> hook = GlueCatalogHook() >>> partition = hook.get_partition('db', 'table', ['string']) >>> partition['Values'] """ try: response = self.get_conn().get_partition( DatabaseName=database_name, TableName=table_name, PartitionValues=partition_values ) return response["Partition"] except ClientError as e: self.log.error("Client error: %s", e) raise AirflowException("AWS request failed, check logs for more info")
[docs] def create_partition(self, database_name: str, table_name: str, partition_input: dict) -> dict: """ Creates a new Partition :param database_name: Database name :param table_name: Database's Table name :param partition_input: Definition of how the partition is created Please see official AWS documentation for further information. https://docs.aws.amazon.com/glue/latest/dg/aws-glue-api-catalog-partitions.html#aws-glue-api-catalog-partitions-CreatePartition :raises: AirflowException >>> hook = GlueCatalogHook() >>> partition_input = {"Values": []} >>> hook.create_partition(database_name="db", table_name="table", partition_input=partition_input) """ try: return self.get_conn().create_partition( DatabaseName=database_name, TableName=table_name, PartitionInput=partition_input ) except ClientError as e: self.log.error("Client error: %s", e) raise AirflowException("AWS request failed, check logs for more info")

Was this entry helpful?