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5a1c68177e
* fix(elasticsearch): cast does not take effect for time zone settings * test(elasticsearch): add test * fix(test): fix typo * docs(elasticsearch): add annotation * docs(elasticsearch): add time_zone desc * docs(elasticsearch): fix typo * refactor(db_engine): change convert_dttm signature * fix(test): fix test * fix(es): add try catch * fix(test): fix caplog * fix(test): fix typo
66 lines
2.2 KiB
Python
66 lines
2.2 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, List, Optional
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from sqlalchemy.engine.reflection import Inspector
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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 ImpalaEngineSpec(BaseEngineSpec):
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"""Engine spec for Cloudera's Impala"""
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engine = "impala"
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engine_name = "Apache Impala"
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_time_grain_expressions = {
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None: "{col}",
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"PT1M": "TRUNC({col}, 'MI')",
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"PT1H": "TRUNC({col}, 'HH')",
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"P1D": "TRUNC({col}, 'DD')",
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"P1W": "TRUNC({col}, 'WW')",
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"P1M": "TRUNC({col}, 'MONTH')",
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"P3M": "TRUNC({col}, 'Q')",
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"P1Y": "TRUNC({col}, 'YYYY')",
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}
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@classmethod
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def epoch_to_dttm(cls) -> str:
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return "from_unixtime({col})"
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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 == utils.TemporalType.DATE:
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return f"CAST('{dttm.date().isoformat()}' AS DATE)"
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if tt == utils.TemporalType.TIMESTAMP:
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return f"""CAST('{dttm.isoformat(timespec="microseconds")}' AS TIMESTAMP)"""
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return None
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@classmethod
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def get_schema_names(cls, inspector: Inspector) -> List[str]:
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schemas = [
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row[0]
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for row in inspector.engine.execute("SHOW SCHEMAS")
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if not row[0].startswith("_")
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]
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return schemas
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