superset firebird 源码
superset firebird 代码
文件路径：/superset/db_engine_specs/firebird.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, LimitMethod
from superset.utils import core as utils
class FirebirdEngineSpec(BaseEngineSpec):
"""Engine for Firebird"""
engine = "firebird"
engine_name = "Firebird"
# Firebird uses FIRST to limit: `SELECT FIRST 10 * FROM table`
limit_method = LimitMethod.FETCH_MANY
_time_grain_expressions = {
None: "{col}",
"PT1S": (
"CAST(CAST({col} AS DATE) "
"|| ' ' "
"|| EXTRACT(HOUR FROM {col}) "
"|| ':' "
"|| EXTRACT(MINUTE FROM {col}) "
"|| ':' "
"|| FLOOR(EXTRACT(SECOND FROM {col})) AS TIMESTAMP)"
),
"PT1M": (
"CAST(CAST({col} AS DATE) "
"|| ' ' "
"|| EXTRACT(HOUR FROM {col}) "
"|| ':' "
"|| EXTRACT(MINUTE FROM {col}) "
"|| ':00' AS TIMESTAMP)"
),
"PT1H": (
"CAST(CAST({col} AS DATE) "
"|| ' ' "
"|| EXTRACT(HOUR FROM {col}) "
"|| ':00:00' AS TIMESTAMP)"
),
"P1D": "CAST({col} AS DATE)",
"P1M": (
"CAST(EXTRACT(YEAR FROM {col}) "
"|| '-' "
"|| EXTRACT(MONTH FROM {col}) "
"|| '-01' AS DATE)"
),
"P1Y": "CAST(EXTRACT(YEAR FROM {col}) || '-01-01' AS DATE)",
}
@classmethod
def epoch_to_dttm(cls) -> str:
return "DATEADD(second, {col}, CAST('00:00:00' AS TIMESTAMP))"
@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.TIMESTAMP:
dttm_formatted = dttm.isoformat(sep=" ")
dttm_valid_precision = dttm_formatted[: len("YYYY-MM-DD HH:MM:SS.MMMM")]
return f"CAST('{dttm_valid_precision}' AS TIMESTAMP)"
if tt == utils.TemporalType.DATE:
return f"CAST('{dttm.date().isoformat()}' AS DATE)"
if tt == utils.TemporalType.TIME:
return f"CAST('{dttm.time().isoformat()}' AS TIME)"
return None
相关信息
相关文章
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦