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61 lines
2.5 KiB
Python
61 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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# pylint: disable=C,R,W
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from superset.db_engine_specs.base import BaseEngineSpec
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class AthenaEngineSpec(BaseEngineSpec):
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engine = "awsathena"
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time_grain_functions = {
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None: "{col}",
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"PT1S": "date_trunc('second', CAST({col} AS TIMESTAMP))",
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"PT1M": "date_trunc('minute', CAST({col} AS TIMESTAMP))",
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"PT1H": "date_trunc('hour', CAST({col} AS TIMESTAMP))",
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"P1D": "date_trunc('day', CAST({col} AS TIMESTAMP))",
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"P1W": "date_trunc('week', CAST({col} AS TIMESTAMP))",
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"P1M": "date_trunc('month', CAST({col} AS TIMESTAMP))",
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"P0.25Y": "date_trunc('quarter', CAST({col} AS TIMESTAMP))",
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"P1Y": "date_trunc('year', CAST({col} AS TIMESTAMP))",
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"P1W/1970-01-03T00:00:00Z": "date_add('day', 5, date_trunc('week', \
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date_add('day', 1, CAST({col} AS TIMESTAMP))))",
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"1969-12-28T00:00:00Z/P1W": "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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@classmethod
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def convert_dttm(cls, target_type, dttm):
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tt = target_type.upper()
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if tt == "DATE":
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return "from_iso8601_date('{}')".format(dttm.isoformat()[:10])
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if tt == "TIMESTAMP":
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return "from_iso8601_timestamp('{}')".format(dttm.isoformat())
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return "CAST ('{}' AS TIMESTAMP)".format(dttm.strftime("%Y-%m-%d %H:%M:%S"))
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@classmethod
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def epoch_to_dttm(cls):
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return "from_unixtime({col})"
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@staticmethod
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def mutate_label(label):
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"""
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Athena only supports lowercase column names and aliases.
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:param str label: Original label which might include uppercase letters
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:return: String that is supported by the database
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"""
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return label.lower()
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