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56 lines
2.4 KiB
Python
56 lines
2.4 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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from datetime import datetime
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from typing import Any, Optional
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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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class KylinEngineSpec(BaseEngineSpec): # pylint: disable=abstract-method
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"""Dialect for Apache Kylin"""
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engine = "kylin"
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engine_name = "Apache Kylin"
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_time_grain_expressions = {
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None: "{col}",
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TimeGrain.SECOND: "CAST(FLOOR(CAST({col} AS TIMESTAMP) TO SECOND) AS TIMESTAMP)", # noqa: E501
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TimeGrain.MINUTE: "CAST(FLOOR(CAST({col} AS TIMESTAMP) TO MINUTE) AS TIMESTAMP)", # noqa: E501
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TimeGrain.HOUR: "CAST(FLOOR(CAST({col} AS TIMESTAMP) TO HOUR) AS TIMESTAMP)",
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TimeGrain.DAY: "CAST(FLOOR(CAST({col} AS TIMESTAMP) TO DAY) AS DATE)",
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TimeGrain.WEEK: "CAST(FLOOR(CAST({col} AS TIMESTAMP) TO WEEK) AS DATE)",
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TimeGrain.MONTH: "CAST(FLOOR(CAST({col} AS TIMESTAMP) TO MONTH) AS DATE)",
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TimeGrain.QUARTER: "CAST(FLOOR(CAST({col} AS TIMESTAMP) TO QUARTER) AS DATE)",
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TimeGrain.YEAR: "CAST(FLOOR(CAST({col} AS TIMESTAMP) TO YEAR) AS DATE)",
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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"CAST('{dttm.date().isoformat()}' AS DATE)"
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if isinstance(sqla_type, types.TIMESTAMP):
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datetime_formatted = dttm.isoformat(sep=" ", timespec="seconds")
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return f"""CAST('{datetime_formatted}' AS TIMESTAMP)"""
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return None
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