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95 lines
3.6 KiB
Python
95 lines
3.6 KiB
Python
# Licensed to the Apache Software Foundation (ASF) under one
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# or more contributor license agreements. See the NOTICE file
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# distributed with this work for additional information
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# regarding copyright ownership. The ASF licenses this file
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# to you under the Apache License, Version 2.0 (the
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# "License"); you may not use this file except in compliance
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# with the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing,
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# software distributed under the License is distributed on an
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# KIND, either express or implied. See the License for the
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# specific language governing permissions and limitations
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# under the License.
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import re
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from datetime import datetime
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from re import Pattern
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from typing import Any, Optional
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from flask_babel import gettext as __
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from sqlalchemy import types
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from superset.constants import TimeGrain
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from superset.db_engine_specs.base import BaseEngineSpec
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from superset.errors import SupersetErrorType
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SYNTAX_ERROR_REGEX = re.compile(
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": mismatched input '(?P<syntax_error>.*?)'. Expecting: "
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)
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class AthenaEngineSpec(BaseEngineSpec):
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engine = "awsathena"
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engine_name = "Amazon Athena"
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allows_escaped_colons = False
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disable_ssh_tunneling = True
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# Athena doesn't support IS true/false syntax, use = true/false instead
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use_equality_for_boolean_filters = True
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_time_grain_expressions = {
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None: "{col}",
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TimeGrain.SECOND: "date_trunc('second', CAST({col} AS TIMESTAMP))",
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TimeGrain.MINUTE: "date_trunc('minute', CAST({col} AS TIMESTAMP))",
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TimeGrain.HOUR: "date_trunc('hour', CAST({col} AS TIMESTAMP))",
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TimeGrain.DAY: "date_trunc('day', CAST({col} AS TIMESTAMP))",
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TimeGrain.WEEK: "date_trunc('week', CAST({col} AS TIMESTAMP))",
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TimeGrain.MONTH: "date_trunc('month', CAST({col} AS TIMESTAMP))",
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TimeGrain.QUARTER: "date_trunc('quarter', CAST({col} AS TIMESTAMP))",
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TimeGrain.YEAR: "date_trunc('year', CAST({col} AS TIMESTAMP))",
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TimeGrain.WEEK_ENDING_SATURDAY: "date_add('day', 5, date_trunc('week', \
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date_add('day', 1, CAST({col} AS TIMESTAMP))))",
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TimeGrain.WEEK_STARTING_SUNDAY: "date_add('day', -1, date_trunc('week', \
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date_add('day', 1, CAST({col} AS TIMESTAMP))))",
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}
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custom_errors: dict[Pattern[str], tuple[str, SupersetErrorType, dict[str, Any]]] = {
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SYNTAX_ERROR_REGEX: (
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__(
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"Please check your query for syntax errors at or "
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'near "%(syntax_error)s". Then, try running your query again.'
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),
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SupersetErrorType.SYNTAX_ERROR,
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{},
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),
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}
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@classmethod
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def convert_dttm(
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cls, target_type: str, dttm: datetime, db_extra: Optional[dict[str, Any]] = None
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) -> Optional[str]:
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sqla_type = cls.get_sqla_column_type(target_type)
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if isinstance(sqla_type, types.Date):
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return f"DATE '{dttm.date().isoformat()}'"
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if isinstance(sqla_type, types.TIMESTAMP):
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datetime_formatted = dttm.isoformat(sep=" ", timespec="milliseconds")
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return f"""TIMESTAMP '{datetime_formatted}'"""
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return None
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@classmethod
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def epoch_to_dttm(cls) -> str:
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return "from_unixtime({col})"
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@staticmethod
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def _mutate_label(label: str) -> str:
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"""
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Athena only supports lowercase column names and aliases.
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:param label: Expected expression label
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:return: Conditionally mutated label
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"""
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return label.lower()
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