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69 lines
2.7 KiB
Python
69 lines
2.7 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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# pylint: disable=C,R,W
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import re
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from sqlalchemy.types import String, UnicodeText
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from superset.db_engine_specs.base import BaseEngineSpec, LimitMethod
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class MssqlEngineSpec(BaseEngineSpec):
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engine = "mssql"
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epoch_to_dttm = "dateadd(S, {col}, '1970-01-01')"
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limit_method = LimitMethod.WRAP_SQL
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max_column_name_length = 128
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time_grain_functions = {
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None: "{col}",
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"PT1S": "DATEADD(second, DATEDIFF(second, '2000-01-01', {col}), '2000-01-01')",
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"PT1M": "DATEADD(minute, DATEDIFF(minute, 0, {col}), 0)",
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"PT5M": "DATEADD(minute, DATEDIFF(minute, 0, {col}) / 5 * 5, 0)",
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"PT10M": "DATEADD(minute, DATEDIFF(minute, 0, {col}) / 10 * 10, 0)",
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"PT15M": "DATEADD(minute, DATEDIFF(minute, 0, {col}) / 15 * 15, 0)",
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"PT0.5H": "DATEADD(minute, DATEDIFF(minute, 0, {col}) / 30 * 30, 0)",
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"PT1H": "DATEADD(hour, DATEDIFF(hour, 0, {col}), 0)",
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"P1D": "DATEADD(day, DATEDIFF(day, 0, {col}), 0)",
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"P1W": "DATEADD(week, DATEDIFF(week, 0, {col}), 0)",
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"P1M": "DATEADD(month, DATEDIFF(month, 0, {col}), 0)",
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"P0.25Y": "DATEADD(quarter, DATEDIFF(quarter, 0, {col}), 0)",
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"P1Y": "DATEADD(year, DATEDIFF(year, 0, {col}), 0)",
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}
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@classmethod
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def convert_dttm(cls, target_type, dttm):
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return "CONVERT(DATETIME, '{}', 126)".format(dttm.isoformat())
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@classmethod
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def fetch_data(cls, cursor, limit):
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data = super(MssqlEngineSpec, cls).fetch_data(cursor, limit)
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if data and type(data[0]).__name__ == "Row":
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data = [[elem for elem in r] for r in data]
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return data
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column_types = [
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(String(), re.compile(r"^(?<!N)((VAR){0,1}CHAR|TEXT|STRING)", re.IGNORECASE)),
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(UnicodeText(), re.compile(r"^N((VAR){0,1}CHAR|TEXT)", re.IGNORECASE)),
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]
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@classmethod
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def get_sqla_column_type(cls, type_):
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for sqla_type, regex in cls.column_types:
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if regex.match(type_):
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return sqla_type
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return None
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