Source code for pallas.exceptions
# Copyright 2020 Akamai Technologies, Inc
#
# Licensed 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.
"""
Exceptions raised when querying Athena.
"""
from __future__ import annotations
import re
[docs]class AthenaQueryError(Exception):
"""Athena query failed."""
#: State of the query execution (FAILED or CANCELLED)
state: str
#: Reason of the state of the query execution.
state_reason: str | None
def __init__(self, execution_id: str, state: str, state_reason: str | None):
self.execution_id = execution_id
self.state = state
self.state_reason = state_reason
[docs] def __str__(self) -> str:
"""
Report query state with its reason.
"""
name = f"Athena query {self.execution_id!r}"
if self.state_reason is not None:
return f"{name} {self.state.lower()}: {self.state_reason}"
return f"{name} {self.state.lower()}"
[docs]class DatabaseNotFoundError(AthenaQueryError):
"""
Athena database does not exist.
Pallas maps string errors returned by Athena to exception classes.
"""
[docs]class TableNotFoundError(AthenaQueryError):
"""
Athena table does not exist.
Pallas maps string errors returned by Athena to exception classes.
"""
# Athena does not return structured errors.
# We have to map error messages to exception types.
error_map = [
# SELECT ...
(re.compile("Schema (.*) does not exist"), DatabaseNotFoundError),
# SHOW ...
(re.compile("Database does not exist: (.*)"), DatabaseNotFoundError),
# SELECT ...
(re.compile("Table (.*) does not exist"), TableNotFoundError),
# INSERT INTO ...
(re.compile("Table (.*) not found in database (.*)"), TableNotFoundError),
# SHOW CREATE TABLE ..., SHOW PARTITIONS ..., DESCRIBE TABLE ...
(re.compile("Table not found (.*)"), TableNotFoundError),
# SHOW CREATE VIEW ..., DROP VIEW ...
(re.compile("View not found or not a valid presto view: (.*)"), TableNotFoundError),
]
def get_error(
execution_id: str, state: str, state_reason: str | None
) -> AthenaQueryError:
error = AthenaQueryError
if state_reason is not None:
for pattern, patter_error in error_map:
if pattern.search(state_reason):
error = patter_error
break
return error(execution_id, state, state_reason)