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fix(databend): databend time grain expression (#26378)
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@ -18,6 +18,7 @@ from sqlalchemy import types
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from sqlalchemy.engine.url import URL
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from urllib3.exceptions import NewConnectionError
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from superset.constants import TimeGrain
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from superset.databases.utils import make_url_safe
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from superset.db_engine_specs.base import (
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BaseEngineSpec,
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@ -45,17 +46,17 @@ class DatabendBaseEngineSpec(BaseEngineSpec):
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_time_grain_expressions = {
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None: "{col}",
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"PT1M": "to_start_of_minute(TO_DATETIME({col}))",
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"PT5M": "to_start_of_five_minutes(TO_DATETIME({col}))",
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"PT10M": "to_start_of_ten_minutes(TO_DATETIME({col}))",
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"PT15M": "to_start_of_fifteen_minutes(TO_DATETIME({col}))",
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"PT30M": "TO_DATETIME(intDiv(toUInt32(TO_DATETIME({col})), 1800)*1800)",
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"PT1H": "to_start_of_hour(TO_DATETIME({col}))",
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"P1D": "to_start_of_day(TO_DATETIME({col}))",
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"P1W": "to_monday(TO_DATETIME({col}))",
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"P1M": "to_start_of_month(TO_DATETIME({col}))",
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"P3M": "to_start_of_quarter(TO_DATETIME({col}))",
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"P1Y": "to_start_of_year(TO_DATETIME({col}))",
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TimeGrain.SECOND: "DATE_TRUNC('SECOND', {col})",
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TimeGrain.MINUTE: "to_start_of_minute(TO_DATETIME({col}))",
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TimeGrain.FIVE_MINUTES: "to_start_of_five_minutes(TO_DATETIME({col}))",
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TimeGrain.TEN_MINUTES: "to_start_of_ten_minutes(TO_DATETIME({col}))",
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TimeGrain.FIFTEEN_MINUTES: "to_start_of_fifteen_minutes(TO_DATETIME({col}))",
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TimeGrain.HOUR: "to_start_of_hour(TO_DATETIME({col}))",
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TimeGrain.DAY: "to_start_of_day(TO_DATETIME({col}))",
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TimeGrain.WEEK: "to_monday(TO_DATETIME({col}))",
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TimeGrain.MONTH: "to_start_of_month(TO_DATETIME({col}))",
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TimeGrain.QUARTER: "to_start_of_quarter(TO_DATETIME({col}))",
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TimeGrain.YEAR: "to_start_of_year(TO_DATETIME({col}))",
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}
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column_type_mappings = (
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@ -133,6 +134,8 @@ class DatabendBaseEngineSpec(BaseEngineSpec):
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if isinstance(sqla_type, types.Date):
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return f"to_date('{dttm.date().isoformat()}')"
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if isinstance(sqla_type, types.TIMESTAMP):
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return f"""TO_TIMESTAMP('{dttm.isoformat(timespec="microseconds")}')"""
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if isinstance(sqla_type, types.DateTime):
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return f"""to_dateTime('{dttm.isoformat(sep=" ", timespec="seconds")}')"""
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return None
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