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63 lines
2.5 KiB
Python
63 lines
2.5 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 datetime import datetime
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from typing import Any, Dict, Optional
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from superset.db_engine_specs.base import BaseEngineSpec
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from superset.utils import core as utils
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class DynamoDBEngineSpec(BaseEngineSpec):
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engine = "dynamodb"
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engine_name = "Amazon DynamoDB"
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_time_grain_expressions = {
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None: "{col}",
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"PT1S": "DATETIME(STRFTIME('%Y-%m-%dT%H:%M:%S', {col}))",
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"PT1M": "DATETIME(STRFTIME('%Y-%m-%dT%H:%M:00', {col}))",
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"PT1H": "DATETIME(STRFTIME('%Y-%m-%dT%H:00:00', {col}))",
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"P1D": "DATETIME({col}, 'start of day')",
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"P1W": "DATETIME({col}, 'start of day', -strftime('%w', {col}) || ' days')",
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"P1M": "DATETIME({col}, 'start of month')",
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"P3M": (
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"DATETIME({col}, 'start of month', "
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"printf('-%d month', (strftime('%m', {col}) - 1) % 3))"
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),
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"P1Y": "DATETIME({col}, 'start of year')",
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"P1W/1970-01-03T00:00:00Z": "DATETIME({col}, 'start of day', 'weekday 6')",
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"P1W/1970-01-04T00:00:00Z": "DATETIME({col}, 'start of day', 'weekday 0')",
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"1969-12-28T00:00:00Z/P1W": (
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"DATETIME({col}, 'start of day', 'weekday 0', '-7 days')"
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),
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"1969-12-29T00:00:00Z/P1W": (
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"DATETIME({col}, 'start of day', 'weekday 1', '-7 days')"
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),
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}
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@classmethod
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def epoch_to_dttm(cls) -> str:
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return "datetime({col}, 'unixepoch')"
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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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tt = target_type.upper()
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if tt in (utils.TemporalType.TEXT, utils.TemporalType.DATETIME):
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return f"""'{dttm.isoformat(sep=" ", timespec="seconds")}'"""
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return None
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