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82 lines
3.5 KiB
Python
82 lines
3.5 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 sqlalchemy import types
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from sqlalchemy.engine.interfaces import Dialect
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from sqlalchemy.types import TypeEngine
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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 PinotEngineSpec(BaseEngineSpec):
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engine = "pinot"
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engine_name = "Apache Pinot"
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allows_subqueries = False
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allows_joins = False
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allows_alias_in_select = False
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allows_alias_in_orderby = False
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# https://docs.pinot.apache.org/users/user-guide-query/supported-transformations#datetime-functions
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_time_grain_expressions = {
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None: "{col}",
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TimeGrain.SECOND: "CAST(DATE_TRUNC('second', "
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+ "CAST({col} AS TIMESTAMP)) AS TIMESTAMP)",
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TimeGrain.MINUTE: "CAST(DATE_TRUNC('minute', "
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+ "CAST({col} AS TIMESTAMP)) AS TIMESTAMP)",
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TimeGrain.FIVE_MINUTES: "CAST(ROUND(DATE_TRUNC('minute', "
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+ "CAST({col} AS TIMESTAMP)), 300000) AS TIMESTAMP)",
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TimeGrain.TEN_MINUTES: "CAST(ROUND(DATE_TRUNC('minute', "
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+ "CAST({col} AS TIMESTAMP)), 600000) AS TIMESTAMP)",
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TimeGrain.FIFTEEN_MINUTES: "CAST(ROUND(DATE_TRUNC('minute', "
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+ "CAST({col} AS TIMESTAMP)), 900000) AS TIMESTAMP)",
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TimeGrain.THIRTY_MINUTES: "CAST(ROUND(DATE_TRUNC('minute', "
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+ "CAST({col} AS TIMESTAMP)), 1800000) AS TIMESTAMP)",
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TimeGrain.HOUR: "CAST(DATE_TRUNC('hour', CAST({col} AS TIMESTAMP)) AS TIMESTAMP)", # noqa: E501
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TimeGrain.DAY: "CAST(DATE_TRUNC('day', CAST({col} AS TIMESTAMP)) AS TIMESTAMP)",
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TimeGrain.WEEK: "CAST(DATE_TRUNC('week', CAST({col} AS TIMESTAMP)) AS TIMESTAMP)", # noqa: E501
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TimeGrain.MONTH: "CAST(DATE_TRUNC('month', "
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+ "CAST({col} AS TIMESTAMP)) AS TIMESTAMP)",
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TimeGrain.QUARTER: "CAST(DATE_TRUNC('quarter', "
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+ "CAST({col} AS TIMESTAMP)) AS TIMESTAMP)",
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TimeGrain.YEAR: "CAST(DATE_TRUNC('year', CAST({col} AS TIMESTAMP)) AS TIMESTAMP)", # noqa: E501
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}
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@classmethod
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def epoch_to_dttm(cls) -> str:
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return (
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"DATETIMECONVERT({col}, '1:SECONDS:EPOCH', '1:SECONDS:EPOCH', '1:SECONDS')"
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)
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@classmethod
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def epoch_ms_to_dttm(cls) -> str:
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return (
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"DATETIMECONVERT({col}, '1:MILLISECONDS:EPOCH', "
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+ "'1:MILLISECONDS:EPOCH', '1:MILLISECONDS')"
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)
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@classmethod
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def column_datatype_to_string(
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cls, sqla_column_type: TypeEngine, dialect: Dialect
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) -> str:
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# Pinot driver infers TIMESTAMP column as LONG, so make the quick fix.
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# When the Pinot driver fix this bug, current method could be removed.
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if isinstance(sqla_column_type, types.TIMESTAMP):
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return sqla_column_type.compile().upper()
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return super().column_datatype_to_string(sqla_column_type, dialect)
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