superset kylin 源码

  • 2022-10-20
  • 浏览 (483)

superset kylin 代码

文件路径:/superset/db_engine_specs/kylin.py

# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
from datetime import datetime
from typing import Any, Dict, Optional

from superset.db_engine_specs.base import BaseEngineSpec
from superset.utils import core as utils


class KylinEngineSpec(BaseEngineSpec):  # pylint: disable=abstract-method
    """Dialect for Apache Kylin"""

    engine = "kylin"
    engine_name = "Apache Kylin"

    _time_grain_expressions = {
        None: "{col}",
        "PT1S": "CAST(FLOOR(CAST({col} AS TIMESTAMP) TO SECOND) AS TIMESTAMP)",
        "PT1M": "CAST(FLOOR(CAST({col} AS TIMESTAMP) TO MINUTE) AS TIMESTAMP)",
        "PT1H": "CAST(FLOOR(CAST({col} AS TIMESTAMP) TO HOUR) AS TIMESTAMP)",
        "P1D": "CAST(FLOOR(CAST({col} AS TIMESTAMP) TO DAY) AS DATE)",
        "P1W": "CAST(FLOOR(CAST({col} AS TIMESTAMP) TO WEEK) AS DATE)",
        "P1M": "CAST(FLOOR(CAST({col} AS TIMESTAMP) TO MONTH) AS DATE)",
        "P3M": "CAST(FLOOR(CAST({col} AS TIMESTAMP) TO QUARTER) AS DATE)",
        "P1Y": "CAST(FLOOR(CAST({col} AS TIMESTAMP) TO YEAR) AS DATE)",
    }

    @classmethod
    def convert_dttm(
        cls, target_type: str, dttm: datetime, db_extra: Optional[Dict[str, Any]] = None
    ) -> Optional[str]:
        tt = target_type.upper()
        if tt == utils.TemporalType.DATE:
            return f"CAST('{dttm.date().isoformat()}' AS DATE)"
        if tt == utils.TemporalType.TIMESTAMP:
            datetime_fomatted = dttm.isoformat(sep=" ", timespec="seconds")
            return f"""CAST('{datetime_fomatted}' AS TIMESTAMP)"""
        return None

相关信息

superset 源码目录

相关文章

superset init 源码

superset ascend 源码

superset athena 源码

superset aurora 源码

superset base 源码

superset bigquery 源码

superset clickhouse 源码

superset cockroachdb 源码

superset crate 源码

superset databricks 源码

0  赞