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https://github.com/apache/superset.git
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12fb8e70cc
* WIP * Implement views in Presto * Clean up * Fix CSS * Fix unit tests * Add types to database * Fix circular import
91 lines
3.3 KiB
Python
91 lines
3.3 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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from datetime import datetime
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from typing import List, TYPE_CHECKING
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from sqlalchemy.engine.reflection import Inspector
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from superset.db_engine_specs.base import BaseEngineSpec
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from superset.utils import core as utils
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if TYPE_CHECKING:
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# prevent circular imports
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from superset.models.core import Database
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class SqliteEngineSpec(BaseEngineSpec):
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engine = "sqlite"
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_time_grain_functions = {
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None: "{col}",
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"PT1S": "DATETIME(STRFTIME('%Y-%m-%dT%H:%M:%S', {col}))",
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"PT1M": "DATETIME(STRFTIME('%Y-%m-%dT%H:%M:00', {col}))",
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"PT1H": "DATETIME(STRFTIME('%Y-%m-%dT%H:00:00', {col}))",
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"P1D": "DATE({col})",
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"P1W": "DATE({col}, -strftime('%W', {col}) || ' days')",
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"P1M": "DATE({col}, -strftime('%d', {col}) || ' days', '+1 day')",
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"P1Y": "DATETIME(STRFTIME('%Y-01-01T00:00:00', {col}))",
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"P1W/1970-01-03T00:00:00Z": "DATE({col}, 'weekday 6')",
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"1969-12-28T00:00:00Z/P1W": "DATE({col}, 'weekday 0', '-7 days')",
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}
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@classmethod
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def epoch_to_dttm(cls) -> str:
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return "datetime({col}, 'unixepoch')"
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@classmethod
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def get_all_datasource_names(
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cls, db, datasource_type: str
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) -> List[utils.DatasourceName]:
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schemas = db.get_all_schema_names(
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cache=db.schema_cache_enabled,
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cache_timeout=db.schema_cache_timeout,
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force=True,
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)
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schema = schemas[0]
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if datasource_type == "table":
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return db.get_all_table_names_in_schema(
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schema=schema,
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force=True,
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cache=db.table_cache_enabled,
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cache_timeout=db.table_cache_timeout,
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)
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elif datasource_type == "view":
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return db.get_all_view_names_in_schema(
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schema=schema,
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force=True,
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cache=db.table_cache_enabled,
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cache_timeout=db.table_cache_timeout,
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)
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else:
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raise Exception(f"Unsupported datasource_type: {datasource_type}")
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@classmethod
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def convert_dttm(cls, target_type: str, dttm: datetime) -> str:
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iso = dttm.isoformat().replace("T", " ")
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if "." not in iso:
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iso += ".000000"
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return "'{}'".format(iso)
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@classmethod
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def get_table_names(
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cls, database: "Database", inspector: Inspector, schema: str
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) -> List[str]:
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"""Need to disregard the schema for Sqlite"""
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return sorted(inspector.get_table_names())
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