ClickHouse/src/DataTypes/DataTypeDateTime64.h at master · BetterStackHQ/ClickHouse

46 lines (33 loc) · 1.47 KB

#pragma once

#include <Core/Types.h>

#include <DataTypes/DataTypeDateTime.h>

#include <DataTypes/DataTypeDecimalBase.h>

namespace DB

{

/** DateTime64 is same as DateTime, but it stores values as Int64 and has configurable sub-second part.

* `scale` determines number of decimal places for sub-second part of the DateTime64.

class DataTypeDateTime64 final : public DataTypeDecimalBase<DateTime64>, public TimezoneMixin

{

public:

using Base = DataTypeDecimalBase<DateTime64>;

static constexpr UInt8 default_scale = 3;

static constexpr auto family_name = "DateTime64";

static constexpr auto type_id = TypeIndex::DateTime64;

explicit DataTypeDateTime64(UInt32 scale_, std::string_view time_zone_name = "");

// reuse timezone from other DateTime/DateTime64

DataTypeDateTime64(UInt32 scale_, const TimezoneMixin & time_zone_info);

const char * getFamilyName() const override { return family_name; }

std::string doGetName() const override;

TypeIndex getTypeId() const override { return type_id; }

void updateHashImpl(SipHash & hash) const override;

bool equals(const IDataType & rhs) const override;

bool canBePromoted() const override { return false; }

bool canBeUsedAsVersion() const override { return true; }

bool isSummable() const override { return false; }

protected:

SerializationPtr doGetSerialization(const SerializationInfoSettings &) const override;

};

std::string getDateTimeTimezone(const IDataType & data_type);

}

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