mirror of
https://github.com/apache/superset.git
synced 2026-04-09 19:35:21 +00:00
60 lines
2.4 KiB
Python
60 lines
2.4 KiB
Python
# 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, Optional
|
|
|
|
from sqlalchemy import types
|
|
|
|
from superset.constants import TimeGrain
|
|
from superset.db_engine_specs.postgres import PostgresBaseEngineSpec
|
|
from superset.sql.parse import LimitMethod
|
|
|
|
|
|
class HanaEngineSpec(PostgresBaseEngineSpec):
|
|
engine = "hana"
|
|
engine_name = "SAP HANA"
|
|
limit_method = LimitMethod.WRAP_SQL
|
|
force_column_alias_quotes = True
|
|
max_column_name_length = 30
|
|
|
|
_time_grain_expressions = {
|
|
None: "{col}",
|
|
TimeGrain.SECOND: "TO_TIMESTAMP(SUBSTRING(TO_TIMESTAMP({col}),0,20))",
|
|
TimeGrain.MINUTE: "TO_TIMESTAMP(SUBSTRING(TO_TIMESTAMP({col}),0,17) || '00')",
|
|
TimeGrain.HOUR: "TO_TIMESTAMP(SUBSTRING(TO_TIMESTAMP({col}),0,14) || '00:00')",
|
|
TimeGrain.DAY: "TO_DATE({col})",
|
|
TimeGrain.MONTH: "TO_DATE(SUBSTRING(TO_DATE({col}),0,7)||'-01')",
|
|
TimeGrain.QUARTER: "TO_DATE(SUBSTRING( \
|
|
TO_DATE({col}), 0, 5)|| LPAD(CAST((CAST(SUBSTRING(QUARTER( \
|
|
TO_DATE({col}), 1), 7, 1) as int)-1)*3 +1 as text),2,'0') ||'-01')",
|
|
TimeGrain.YEAR: "TO_DATE(YEAR({col})||'-01-01')",
|
|
}
|
|
|
|
@classmethod
|
|
def convert_dttm(
|
|
cls, target_type: str, dttm: datetime, db_extra: Optional[dict[str, Any]] = None
|
|
) -> Optional[str]:
|
|
sqla_type = cls.get_sqla_column_type(target_type)
|
|
|
|
if isinstance(sqla_type, types.Date):
|
|
return f"TO_DATE('{dttm.date().isoformat()}', 'YYYY-MM-DD')"
|
|
if isinstance(sqla_type, types.TIMESTAMP):
|
|
return f"""TO_TIMESTAMP('{
|
|
dttm.isoformat(timespec="microseconds")
|
|
}', 'YYYY-MM-DD"T"HH24:MI:SS.ff6')"""
|
|
return None
|