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131 lines
4.8 KiB
Python
131 lines
4.8 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 logging
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from datetime import datetime
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from typing import Any, Dict, Optional, Type
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from packaging.version import Version
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from sqlalchemy import types
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from superset.db_engine_specs.base import BaseEngineSpec
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from superset.db_engine_specs.exceptions import (
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SupersetDBAPIDatabaseError,
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SupersetDBAPIOperationalError,
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SupersetDBAPIProgrammingError,
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)
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logger = logging.getLogger()
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class ElasticSearchEngineSpec(BaseEngineSpec): # pylint: disable=abstract-method
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engine = "elasticsearch"
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engine_name = "ElasticSearch (SQL API)"
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time_groupby_inline = True
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time_secondary_columns = True
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allows_joins = False
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allows_subqueries = True
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allows_sql_comments = False
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_time_grain_expressions = {
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None: "{col}",
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"PT1S": "HISTOGRAM({col}, INTERVAL 1 SECOND)",
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"PT1M": "HISTOGRAM({col}, INTERVAL 1 MINUTE)",
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"PT1H": "HISTOGRAM({col}, INTERVAL 1 HOUR)",
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"P1D": "HISTOGRAM({col}, INTERVAL 1 DAY)",
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"P1M": "HISTOGRAM({col}, INTERVAL 1 MONTH)",
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"P1Y": "HISTOGRAM({col}, INTERVAL 1 YEAR)",
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}
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type_code_map: Dict[int, str] = {} # loaded from get_datatype only if needed
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@classmethod
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def get_dbapi_exception_mapping(cls) -> Dict[Type[Exception], Type[Exception]]:
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# pylint: disable=import-error,import-outside-toplevel
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import es.exceptions as es_exceptions
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return {
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es_exceptions.DatabaseError: SupersetDBAPIDatabaseError,
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es_exceptions.OperationalError: SupersetDBAPIOperationalError,
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es_exceptions.ProgrammingError: SupersetDBAPIProgrammingError,
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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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db_extra = db_extra or {}
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sqla_type = cls.get_sqla_column_type(target_type)
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if isinstance(sqla_type, types.DateTime):
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es_version = db_extra.get("version")
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# The elasticsearch CAST function does not take effect for the time zone
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# setting. In elasticsearch7.8 and above, we can use the DATETIME_PARSE
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# function to solve this problem.
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supports_dttm_parse = False
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try:
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if es_version:
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supports_dttm_parse = Version(es_version) >= Version("7.8")
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except Exception as ex: # pylint: disable=broad-except
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logger.error("Unexpected error while convert es_version", exc_info=True)
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logger.exception(ex)
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if supports_dttm_parse:
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datetime_formatted = dttm.isoformat(sep=" ", timespec="seconds")
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return (
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f"""DATETIME_PARSE('{datetime_formatted}', 'yyyy-MM-dd HH:mm:ss')"""
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)
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return f"""CAST('{dttm.isoformat(timespec="seconds")}' AS DATETIME)"""
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return None
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class OpenDistroEngineSpec(BaseEngineSpec): # pylint: disable=abstract-method
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time_groupby_inline = True
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time_secondary_columns = True
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allows_joins = False
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allows_subqueries = True
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allows_sql_comments = False
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_time_grain_expressions = {
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None: "{col}",
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"PT1S": "date_format({col}, 'yyyy-MM-dd HH:mm:ss.000')",
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"PT1M": "date_format({col}, 'yyyy-MM-dd HH:mm:00.000')",
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"PT1H": "date_format({col}, 'yyyy-MM-dd HH:00:00.000')",
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"P1D": "date_format({col}, 'yyyy-MM-dd 00:00:00.000')",
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"P1M": "date_format({col}, 'yyyy-MM-01 00:00:00.000')",
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"P1Y": "date_format({col}, 'yyyy-01-01 00:00:00.000')",
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}
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engine = "odelasticsearch"
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engine_name = "ElasticSearch (OpenDistro SQL)"
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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.DateTime):
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return f"""'{dttm.isoformat(timespec="seconds")}'"""
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return None
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@staticmethod
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def _mutate_label(label: str) -> str:
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return label.replace(".", "_")
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