Source code for airflow.providers.amazon.aws.operators.athena
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from typing import TYPE_CHECKING, Any, Dict, Optional, Sequence
from airflow.compat.functools import cached_property
from airflow.models import BaseOperator
from airflow.providers.amazon.aws.hooks.athena import AthenaHook
if TYPE_CHECKING:
from airflow.utils.context import Context
[docs]class AthenaOperator(BaseOperator):
"""
An operator that submits a presto query to athena.
.. seealso::
For more information on how to use this operator, take a look at the guide:
:ref:`howto/operator:AthenaOperator`
:param query: Presto to be run on athena. (templated)
:param database: Database to select. (templated)
:param output_location: s3 path to write the query results into. (templated)
:param aws_conn_id: aws connection to use
:param client_request_token: Unique token created by user to avoid multiple executions of same query
:param workgroup: Athena workgroup in which query will be run
:param query_execution_context: Context in which query need to be run
:param result_configuration: Dict with path to store results in and config related to encryption
:param sleep_time: Time (in seconds) to wait between two consecutive calls to check query status on Athena
:param max_tries: Number of times to poll for query state before function exits
"""
[docs] template_fields: Sequence[str] = ('query', 'database', 'output_location')
[docs] template_ext: Sequence[str] = ('.sql',)
[docs] template_fields_renderers = {"query": "sql"}
def __init__(
self,
*,
query: str,
database: str,
output_location: str,
aws_conn_id: str = "aws_default",
client_request_token: Optional[str] = None,
workgroup: str = "primary",
query_execution_context: Optional[Dict[str, str]] = None,
result_configuration: Optional[Dict[str, Any]] = None,
sleep_time: int = 30,
max_tries: Optional[int] = None,
**kwargs: Any,
) -> None:
super().__init__(**kwargs)
self.query = query
self.database = database
self.output_location = output_location
self.aws_conn_id = aws_conn_id
self.client_request_token = client_request_token
self.workgroup = workgroup
self.query_execution_context = query_execution_context or {}
self.result_configuration = result_configuration or {}
self.sleep_time = sleep_time
self.max_tries = max_tries
self.query_execution_id = None # type: Optional[str]
@cached_property
[docs] def hook(self) -> AthenaHook:
"""Create and return an AthenaHook."""
return AthenaHook(self.aws_conn_id, sleep_time=self.sleep_time)
[docs] def execute(self, context: 'Context') -> Optional[str]:
"""Run Presto Query on Athena"""
self.query_execution_context['Database'] = self.database
self.result_configuration['OutputLocation'] = self.output_location
self.query_execution_id = self.hook.run_query(
self.query,
self.query_execution_context,
self.result_configuration,
self.client_request_token,
self.workgroup,
)
query_status = self.hook.poll_query_status(self.query_execution_id, self.max_tries)
if query_status in AthenaHook.FAILURE_STATES:
error_message = self.hook.get_state_change_reason(self.query_execution_id)
raise Exception(
f'Final state of Athena job is {query_status}, query_execution_id is '
f'{self.query_execution_id}. Error: {error_message}'
)
elif not query_status or query_status in AthenaHook.INTERMEDIATE_STATES:
raise Exception(
f'Final state of Athena job is {query_status}. Max tries of poll status exceeded, '
f'query_execution_id is {self.query_execution_id}.'
)
return self.query_execution_id
[docs] def on_kill(self) -> None:
"""Cancel the submitted athena query"""
if self.query_execution_id:
self.log.info('Received a kill signal.')
self.log.info('Stopping Query with executionId - %s', self.query_execution_id)
response = self.hook.stop_query(self.query_execution_id)
http_status_code = None
try:
http_status_code = response['ResponseMetadata']['HTTPStatusCode']
except Exception as ex:
self.log.error('Exception while cancelling query: %s', ex)
finally:
if http_status_code is None or http_status_code != 200:
self.log.error('Unable to request query cancel on athena. Exiting')
else:
self.log.info(
'Polling Athena for query with id %s to reach final state', self.query_execution_id
)
self.hook.poll_query_status(self.query_execution_id)
