superset ascend 源码
superset ascend 代码
文件路径：/superset/db_engine_specs/ascend.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 sqlalchemy.dialects import registry
from superset.db_engine_specs.impala import ImpalaEngineSpec
class AscendEngineSpec(ImpalaEngineSpec):
"""Engine spec for Ascend.io (Hive2+TLS) using Cloudera's Impala"""
engine = "ascend"
registry.register("ascend", "impala.sqlalchemy", "ImpalaDialect")
engine_name = "Ascend"
_time_grain_expressions = {
None: "{col}",
"PT1S": "DATE_TRUNC('second', {col})",
"PT1M": "DATE_TRUNC('minute', {col})",
"PT1H": "DATE_TRUNC('hour', {col})",
"P1D": "DATE_TRUNC('day', {col})",
"P1W": "DATE_TRUNC('week', {col})",
"P1M": "DATE_TRUNC('month', {col})",
"P3M": "DATE_TRUNC('quarter', {col})",
"P1Y": "DATE_TRUNC('year', {col})",
}
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