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common.py
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# -*- coding: utf-8 -*-
from __future__ import annotations
import logging
import sys
import time
from abc import ABCMeta, abstractmethod
from datetime import datetime, timedelta, timezone
from typing import TYPE_CHECKING, Any, Dict, List, Optional, Tuple, Union, cast
from pyathena.converter import Converter, DefaultTypeConverter
from pyathena.error import DatabaseError, OperationalError, ProgrammingError
from pyathena.formatter import Formatter
from pyathena.model import (
AthenaCalculationExecution,
AthenaCalculationExecutionStatus,
AthenaDatabase,
AthenaQueryExecution,
AthenaTableMetadata,
)
from pyathena.util import RetryConfig, retry_api_call
if TYPE_CHECKING:
from pyathena.connection import Connection
_logger = logging.getLogger(__name__) # type: ignore
class CursorIterator(metaclass=ABCMeta):
# https://docs.aws.amazon.com/athena/latest/APIReference/API_GetQueryResults.html
# Valid Range: Minimum value of 1. Maximum value of 1000.
DEFAULT_FETCH_SIZE: int = 1000
# https://docs.aws.amazon.com/athena/latest/APIReference/API_ResultReuseByAgeConfiguration.html
# Specifies, in minutes, the maximum age of a previous query result
# that Athena should consider for reuse. The default is 60.
DEFAULT_RESULT_REUSE_MINUTES = 60
def __init__(self, **kwargs) -> None:
super().__init__()
self.arraysize: int = kwargs.get("arraysize", self.DEFAULT_FETCH_SIZE)
self._rownumber: Optional[int] = None
self._rowcount: int = -1 # By default, return -1 to indicate that this is not supported.
@property
def arraysize(self) -> int:
return self._arraysize
@arraysize.setter
def arraysize(self, value: int) -> None:
if value <= 0 or value > self.DEFAULT_FETCH_SIZE:
raise ProgrammingError(
f"MaxResults is more than maximum allowed length {self.DEFAULT_FETCH_SIZE}."
)
self._arraysize = value
@property
def rownumber(self) -> Optional[int]:
return self._rownumber
@property
def rowcount(self) -> int:
return self._rowcount
@abstractmethod
def fetchone(self):
raise NotImplementedError # pragma: no cover
@abstractmethod
def fetchmany(self):
raise NotImplementedError # pragma: no cover
@abstractmethod
def fetchall(self):
raise NotImplementedError # pragma: no cover
def __next__(self):
row = self.fetchone()
if row is None:
raise StopIteration
else:
return row
def __iter__(self):
return self
class BaseCursor(metaclass=ABCMeta):
# https://docs.aws.amazon.com/athena/latest/APIReference/API_ListQueryExecutions.html
# Valid Range: Minimum value of 0. Maximum value of 50.
LIST_QUERY_EXECUTIONS_MAX_RESULTS = 50
# https://docs.aws.amazon.com/athena/latest/APIReference/API_ListTableMetadata.html
# Valid Range: Minimum value of 1. Maximum value of 50.
LIST_TABLE_METADATA_MAX_RESULTS = 50
# https://docs.aws.amazon.com/athena/latest/APIReference/API_ListDatabases.html
# Valid Range: Minimum value of 1. Maximum value of 50.
LIST_DATABASES_MAX_RESULTS = 50
def __init__(
self,
connection: "Connection[Any]",
converter: Converter,
formatter: Formatter,
retry_config: RetryConfig,
s3_staging_dir: Optional[str],
schema_name: Optional[str],
catalog_name: Optional[str],
work_group: Optional[str],
poll_interval: float,
encryption_option: Optional[str],
kms_key: Optional[str],
kill_on_interrupt: bool,
result_reuse_enable: bool,
result_reuse_minutes: int,
**kwargs,
) -> None:
super().__init__()
self._connection = connection
self._converter = converter
self._formatter = formatter
self._retry_config = retry_config
self._s3_staging_dir = s3_staging_dir
self._schema_name = schema_name
self._catalog_name = catalog_name
self._work_group = work_group
self._poll_interval = poll_interval
self._encryption_option = encryption_option
self._kms_key = kms_key
self._kill_on_interrupt = kill_on_interrupt
self._result_reuse_enable = result_reuse_enable
self._result_reuse_minutes = result_reuse_minutes
@staticmethod
def get_default_converter(unload: bool = False) -> Union[DefaultTypeConverter, Any]:
return DefaultTypeConverter()
@property
def connection(self) -> "Connection[Any]":
return self._connection
def _build_start_query_execution_request(
self,
query: str,
work_group: Optional[str] = None,
s3_staging_dir: Optional[str] = None,
result_reuse_enable: Optional[bool] = None,
result_reuse_minutes: Optional[int] = None,
) -> Dict[str, Any]:
request: Dict[str, Any] = {
"QueryString": query,
"QueryExecutionContext": {},
"ResultConfiguration": {},
}
if self._schema_name:
request["QueryExecutionContext"].update({"Database": self._schema_name})
if self._catalog_name:
request["QueryExecutionContext"].update({"Catalog": self._catalog_name})
if self._s3_staging_dir or s3_staging_dir:
request["ResultConfiguration"].update(
{"OutputLocation": s3_staging_dir if s3_staging_dir else self._s3_staging_dir}
)
if self._work_group or work_group:
request.update({"WorkGroup": work_group if work_group else self._work_group})
if self._encryption_option:
enc_conf = {
"EncryptionOption": self._encryption_option,
}
if self._kms_key:
enc_conf.update({"KmsKey": self._kms_key})
request["ResultConfiguration"].update({"EncryptionConfiguration": enc_conf})
if self._result_reuse_enable or result_reuse_enable:
reuse_conf = {
"Enabled": result_reuse_enable
if result_reuse_enable is not None
else self._result_reuse_enable,
"MaxAgeInMinutes": result_reuse_minutes
if result_reuse_minutes is not None
else self._result_reuse_minutes,
}
request["ResultReuseConfiguration"] = {"ResultReuseByAgeConfiguration": reuse_conf}
return request
def _build_start_calculation_execution_request(
self,
session_id: str,
code_block: str,
description: Optional[str] = None,
client_request_token: Optional[str] = None,
):
request: Dict[str, Any] = {
"SessionId": session_id,
"CodeBlock": code_block,
}
if description:
request.update({"Description": description})
if client_request_token:
request.update({"ClientRequestToken": client_request_token})
return request
def _build_list_query_executions_request(
self,
work_group: Optional[str],
next_token: Optional[str] = None,
max_results: Optional[int] = None,
) -> Dict[str, Any]:
request: Dict[str, Any] = {
"MaxResults": max_results if max_results else self.LIST_QUERY_EXECUTIONS_MAX_RESULTS
}
if self._work_group or work_group:
request.update({"WorkGroup": work_group if work_group else self._work_group})
if next_token:
request.update({"NextToken": next_token})
return request
def _build_list_table_metadata_request(
self,
catalog_name: Optional[str],
schema_name: Optional[str],
expression: Optional[str] = None,
next_token: Optional[str] = None,
max_results: Optional[int] = None,
) -> Dict[str, Any]:
request: Dict[str, Any] = {
"CatalogName": catalog_name if catalog_name else self._catalog_name,
"DatabaseName": schema_name if schema_name else self._schema_name,
"MaxResults": max_results if max_results else self.LIST_TABLE_METADATA_MAX_RESULTS,
}
if expression:
request.update({"Expression": expression})
if next_token:
request.update({"NextToken": next_token})
return request
def _build_list_databases_request(
self,
catalog_name: Optional[str],
next_token: Optional[str] = None,
max_results: Optional[int] = None,
):
request: Dict[str, Any] = {
"CatalogName": catalog_name if catalog_name else self._catalog_name,
"MaxResults": max_results if max_results else self.LIST_DATABASES_MAX_RESULTS,
}
if next_token:
request.update({"NextToken": next_token})
return request
def _list_databases(
self,
catalog_name: Optional[str],
next_token: Optional[str] = None,
max_results: Optional[int] = None,
) -> Tuple[Optional[str], List[AthenaDatabase]]:
request = self._build_list_databases_request(
catalog_name=catalog_name,
next_token=next_token,
max_results=max_results,
)
try:
response = retry_api_call(
self.connection._client.list_databases,
config=self._retry_config,
logger=_logger,
**request,
)
except Exception as e:
_logger.exception("Failed to list databases.")
raise OperationalError(*e.args) from e
else:
return response.get("NextToken"), [
AthenaDatabase({"Database": r}) for r in response.get("DatabaseList", [])
]
def list_databases(
self,
catalog_name: Optional[str],
max_results: Optional[int] = None,
) -> List[AthenaDatabase]:
databases = []
next_token = None
while True:
next_token, response = self._list_databases(
catalog_name=catalog_name,
next_token=next_token,
max_results=max_results,
)
databases.extend(response)
if not next_token:
break
return databases
def _get_table_metadata(
self,
table_name: str,
catalog_name: Optional[str] = None,
schema_name: Optional[str] = None,
logging_: bool = True,
) -> AthenaTableMetadata:
request = {
"CatalogName": catalog_name if catalog_name else self._catalog_name,
"DatabaseName": schema_name if schema_name else self._schema_name,
"TableName": table_name,
}
try:
response = retry_api_call(
self._connection.client.get_table_metadata,
config=self._retry_config,
logger=_logger,
**request,
)
except Exception as e:
if logging_:
_logger.exception("Failed to get table metadata.")
raise OperationalError(*e.args) from e
else:
return AthenaTableMetadata(response)
def get_table_metadata(
self,
table_name: str,
catalog_name: Optional[str] = None,
schema_name: Optional[str] = None,
logging_: bool = True,
) -> AthenaTableMetadata:
return self._get_table_metadata(
table_name=table_name,
catalog_name=catalog_name,
schema_name=schema_name,
logging_=logging_,
)
def _list_table_metadata(
self,
catalog_name: Optional[str] = None,
schema_name: Optional[str] = None,
expression: Optional[str] = None,
next_token: Optional[str] = None,
max_results: Optional[int] = None,
) -> Tuple[Optional[str], List[AthenaTableMetadata]]:
request = self._build_list_table_metadata_request(
catalog_name=catalog_name,
schema_name=schema_name,
expression=expression,
next_token=next_token,
max_results=max_results,
)
try:
response = retry_api_call(
self.connection._client.list_table_metadata,
config=self._retry_config,
logger=_logger,
**request,
)
except Exception as e:
_logger.exception("Failed to list table metadata.")
raise OperationalError(*e.args) from e
else:
return response.get("NextToken"), [
AthenaTableMetadata({"TableMetadata": r})
for r in response.get("TableMetadataList", [])
]
def list_table_metadata(
self,
catalog_name: Optional[str] = None,
schema_name: Optional[str] = None,
expression: Optional[str] = None,
max_results: Optional[int] = None,
) -> List[AthenaTableMetadata]:
metadata = []
next_token = None
while True:
next_token, response = self._list_table_metadata(
catalog_name=catalog_name,
schema_name=schema_name,
expression=expression,
next_token=next_token,
max_results=max_results,
)
metadata.extend(response)
if not next_token:
break
return metadata
def _get_query_execution(self, query_id: str) -> AthenaQueryExecution:
request = {"QueryExecutionId": query_id}
try:
response = retry_api_call(
self._connection.client.get_query_execution,
config=self._retry_config,
logger=_logger,
**request,
)
except Exception as e:
_logger.exception("Failed to get query execution.")
raise OperationalError(*e.args) from e
else:
return AthenaQueryExecution(response)
def _get_calculation_execution_status(self, query_id: str) -> AthenaCalculationExecutionStatus:
request = {"CalculationExecutionId": query_id}
try:
response = retry_api_call(
self._connection.client.get_calculation_execution_status,
config=self._retry_config,
logger=_logger,
**request,
)
except Exception as e:
_logger.exception("Failed to get calculation execution status.")
raise OperationalError(*e.args) from e
else:
return AthenaCalculationExecutionStatus(response)
def _get_calculation_execution(self, query_id: str) -> AthenaCalculationExecution:
request = {"CalculationExecutionId": query_id}
try:
response = retry_api_call(
self._connection.client.get_calculation_execution,
config=self._retry_config,
logger=_logger,
**request,
)
except Exception as e:
_logger.exception("Failed to get calculation execution.")
raise OperationalError(*e.args) from e
else:
return AthenaCalculationExecution(response)
def _batch_get_query_execution(self, query_ids: List[str]) -> List[AthenaQueryExecution]:
try:
response = retry_api_call(
self.connection._client.batch_get_query_execution,
config=self._retry_config,
logger=_logger,
QueryExecutionIds=query_ids,
)
except Exception as e:
_logger.exception("Failed to batch get query execution.")
raise OperationalError(*e.args) from e
else:
return [
AthenaQueryExecution({"QueryExecution": r})
for r in response.get("QueryExecutions", [])
]
def _list_query_executions(
self,
work_group: Optional[str] = None,
next_token: Optional[str] = None,
max_results: Optional[int] = None,
) -> Tuple[Optional[str], List[AthenaQueryExecution]]:
request = self._build_list_query_executions_request(
work_group=work_group, next_token=next_token, max_results=max_results
)
try:
response = retry_api_call(
self.connection._client.list_query_executions,
config=self._retry_config,
logger=_logger,
**request,
)
except Exception as e:
_logger.exception("Failed to list query executions.")
raise OperationalError(*e.args) from e
else:
next_token = response.get("NextToken")
query_ids = response.get("QueryExecutionIds")
if not query_ids:
return next_token, []
return next_token, self._batch_get_query_execution(query_ids)
def __poll(self, query_id: str) -> Union[AthenaQueryExecution, AthenaCalculationExecution]:
while True:
query_execution = self._get_query_execution(query_id)
if query_execution.state in [
AthenaQueryExecution.STATE_SUCCEEDED,
AthenaQueryExecution.STATE_FAILED,
AthenaQueryExecution.STATE_CANCELLED,
]:
return query_execution
else:
time.sleep(self._poll_interval)
def _poll(self, query_id: str) -> Union[AthenaQueryExecution, AthenaCalculationExecution]:
try:
query_execution = self.__poll(query_id)
except KeyboardInterrupt as e:
if self._kill_on_interrupt:
_logger.warning("Query canceled by user.")
self._cancel(query_id)
query_execution = self.__poll(query_id)
else:
raise e
return query_execution
def _find_previous_query_id(
self,
query: str,
work_group: Optional[str],
cache_size: int = 0,
cache_expiration_time: int = 0,
) -> Optional[str]:
query_id = None
if cache_size == 0 and cache_expiration_time > 0:
cache_size = sys.maxsize
if cache_expiration_time > 0:
expiration_time = datetime.now(timezone.utc) - timedelta(seconds=cache_expiration_time)
else:
expiration_time = datetime.now(timezone.utc)
try:
next_token = None
while cache_size > 0:
max_results = min(cache_size, self.LIST_QUERY_EXECUTIONS_MAX_RESULTS)
cache_size -= max_results
next_token, query_executions = self._list_query_executions(
work_group, next_token=next_token, max_results=max_results
)
for execution in sorted(
(
e
for e in query_executions
if e.state == AthenaQueryExecution.STATE_SUCCEEDED
and e.statement_type == AthenaQueryExecution.STATEMENT_TYPE_DML
),
# https://github.com/python/mypy/issues/9656
key=lambda e: e.completion_date_time, # type: ignore
reverse=True,
):
if (
cache_expiration_time > 0
and execution.completion_date_time
and execution.completion_date_time.astimezone(timezone.utc)
< expiration_time
):
next_token = None
break
if execution.query == query:
query_id = execution.query_id
break
if query_id or next_token is None:
break
except Exception:
_logger.warning("Failed to check the cache. Moving on without cache.", exc_info=True)
return query_id
def _execute(
self,
operation: str,
parameters: Optional[Dict[str, Any]] = None,
work_group: Optional[str] = None,
s3_staging_dir: Optional[str] = None,
cache_size: Optional[int] = 0,
cache_expiration_time: Optional[int] = 0,
result_reuse_enable: Optional[bool] = None,
result_reuse_minutes: Optional[int] = None,
) -> str:
query = self._formatter.format(operation, parameters)
_logger.debug(query)
request = self._build_start_query_execution_request(
query=query,
work_group=work_group,
s3_staging_dir=s3_staging_dir,
result_reuse_enable=result_reuse_enable,
result_reuse_minutes=result_reuse_minutes,
)
query_id = self._find_previous_query_id(
query,
work_group,
cache_size=cache_size if cache_size else 0,
cache_expiration_time=cache_expiration_time if cache_expiration_time else 0,
)
if query_id is None:
try:
query_id = retry_api_call(
self._connection.client.start_query_execution,
config=self._retry_config,
logger=_logger,
**request,
).get("QueryExecutionId")
except Exception as e:
_logger.exception("Failed to execute query.")
raise DatabaseError(*e.args) from e
return query_id
def _calculate(
self,
session_id: str,
code_block: str,
description: Optional[str] = None,
client_request_token: Optional[str] = None,
) -> str:
request = self._build_start_calculation_execution_request(
session_id=session_id,
code_block=code_block,
description=description,
client_request_token=client_request_token,
)
try:
calculation_id = retry_api_call(
self._connection.client.start_calculation_execution,
config=self._retry_config,
logger=_logger,
**request,
).get("CalculationExecutionId")
except Exception as e:
_logger.exception("Failed to execute calculation.")
raise DatabaseError(*e.args) from e
return cast(str, calculation_id)
@abstractmethod
def execute(
self,
operation: str,
parameters: Optional[Dict[str, Any]] = None,
**kwargs,
):
raise NotImplementedError # pragma: no cover
@abstractmethod
def executemany(
self, operation: str, seq_of_parameters: List[Optional[Dict[str, Any]]], **kwargs
) -> None:
raise NotImplementedError # pragma: no cover
@abstractmethod
def close(self) -> None:
raise NotImplementedError # pragma: no cover
def _cancel(self, query_id: str) -> None:
request = {"QueryExecutionId": query_id}
try:
retry_api_call(
self._connection.client.stop_query_execution,
config=self._retry_config,
logger=_logger,
**request,
)
except Exception as e:
_logger.exception("Failed to cancel query.")
raise OperationalError(*e.args) from e
def setinputsizes(self, sizes):
"""Does nothing by default"""
pass
def setoutputsize(self, size, column=None):
"""Does nothing by default"""
pass
def __enter__(self):
return self
def __exit__(self, exc_type, exc_val, exc_tb):
self.close()