ClickHouse

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#include <Functions/FunctionFactory.h>
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#include <Functions/DateTimeTransforms.h>
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#include <Functions/FunctionDateOrDateTimeToDateTimeOrDateTime64.h>
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namespace DB
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{
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using FunctionToStartOfDay = FunctionDateOrDateTimeToDateTimeOrDateTime64<ToStartOfDayImpl>;
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REGISTER_FUNCTION(ToStartOfDay)
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{
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    factory.registerFunction<FunctionToStartOfDay>();
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}
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}
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