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Golang Datum.GetString方法代碼示例

本文整理匯總了Golang中github.com/pingcap/tidb/util/types.Datum.GetString方法的典型用法代碼示例。如果您正苦於以下問題：Golang Datum.GetString方法的具體用法？Golang Datum.GetString怎麽用？Golang Datum.GetString使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類github.com/pingcap/tidb/util/types.Datum的用法示例。


在下文中一共展示了Datum.GetString方法的5個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Golang代碼示例。

示例1: unflatten

func unflatten(datum types.Datum, tp *types.FieldType) (types.Datum, error) {
	if datum.IsNull() {
		return datum, nil
	}
	switch tp.Tp {
	case mysql.TypeFloat:
		datum.SetFloat32(float32(datum.GetFloat64()))
		return datum, nil
	case mysql.TypeTiny, mysql.TypeShort, mysql.TypeYear, mysql.TypeInt24, mysql.TypeLong, mysql.TypeLonglong,
		mysql.TypeDouble, mysql.TypeTinyBlob, mysql.TypeMediumBlob, mysql.TypeBlob, mysql.TypeLongBlob,
		mysql.TypeVarchar, mysql.TypeString:
		return datum, nil
	case mysql.TypeDate, mysql.TypeDatetime, mysql.TypeTimestamp:
		var t mysql.Time
		t.Type = tp.Tp
		t.Fsp = tp.Decimal
		err := t.Unmarshal(datum.GetBytes())
		if err != nil {
			return datum, errors.Trace(err)
		}
		datum.SetValue(t)
		return datum, nil
	case mysql.TypeDuration:
		dur := mysql.Duration{Duration: time.Duration(datum.GetInt64())}
		datum.SetValue(dur)
		return datum, nil
	case mysql.TypeNewDecimal, mysql.TypeDecimal:
		dec, err := mysql.ParseDecimal(datum.GetString())
		if err != nil {
			return datum, errors.Trace(err)
		}
		if tp.Decimal >= 0 {
			dec = dec.Truncate(int32(tp.Decimal))
		}
		datum.SetValue(dec)
		return datum, nil
	case mysql.TypeEnum:
		enum, err := mysql.ParseEnumValue(tp.Elems, datum.GetUint64())
		if err != nil {
			return datum, errors.Trace(err)
		}
		datum.SetValue(enum)
		return datum, nil
	case mysql.TypeSet:
		set, err := mysql.ParseSetValue(tp.Elems, datum.GetUint64())
		if err != nil {
			return datum, errors.Trace(err)
		}
		datum.SetValue(set)
		return datum, nil
	case mysql.TypeBit:
		bit := mysql.Bit{Value: datum.GetUint64(), Width: tp.Flen}
		datum.SetValue(bit)
		return datum, nil
	}
	log.Error(tp.Tp, datum)
	return datum, nil
}
開發者ID:anywhy，項目名稱:tidb，代碼行數:58，代碼來源:tables.go

示例2: parseDayInterval

func parseDayInterval(value types.Datum) (int64, error) {
	switch value.Kind() {
	case types.KindString:
		vs := value.GetString()
		s := strings.ToLower(vs)
		if s == "false" {
			return 0, nil
		} else if s == "true" {
			return 1, nil
		}
		value.SetString(reg.FindString(vs))
	}
	return value.ToInt64()
}
開發者ID:astaxie，項目名稱:tidb，代碼行數:14，代碼來源:builtin_time.go

示例3: coerceArithmetic

func coerceArithmetic(a types.Datum) (d types.Datum, err error) {
	switch a.Kind() {
	case types.KindString, types.KindBytes:
		// MySQL will convert string to float for arithmetic operation
		f, err := types.StrToFloat(a.GetString())
		if err != nil {
			return d, errors.Trace(err)
		}
		d.SetFloat64(f)
		return d, errors.Trace(err)
	case types.KindMysqlTime:
		// if time has no precision, return int64
		t := a.GetMysqlTime()
		de := t.ToNumber()
		if t.Fsp == 0 {
			d.SetInt64(de.IntPart())
			return d, nil
		}
		d.SetMysqlDecimal(de)
		return d, nil
	case types.KindMysqlDuration:
		// if duration has no precision, return int64
		du := a.GetMysqlDuration()
		de := du.ToNumber()
		if du.Fsp == 0 {
			d.SetInt64(de.IntPart())
			return d, nil
		}
		d.SetMysqlDecimal(de)
		return d, nil
	case types.KindMysqlHex:
		d.SetFloat64(a.GetMysqlHex().ToNumber())
		return d, nil
	case types.KindMysqlBit:
		d.SetFloat64(a.GetMysqlBit().ToNumber())
		return d, nil
	case types.KindMysqlEnum:
		d.SetFloat64(a.GetMysqlEnum().ToNumber())
		return d, nil
	case types.KindMysqlSet:
		d.SetFloat64(a.GetMysqlSet().ToNumber())
		return d, nil
	default:
		return a, nil
	}
}
開發者ID:astaxie，項目名稱:tidb，代碼行數:46，代碼來源:evaluator_binop.go

示例4: convertDateFormat

func convertDateFormat(ctx context.Context, arg types.Datum, b byte) (types.Datum, error) {
	var d types.Datum
	var err error

	switch b {
	case 'b':
		d, err = builtinMonthName([]types.Datum{arg}, ctx)
		if err == nil && !d.IsNull() {
			d.SetString(d.GetString()[:3])
		}
	case 'M':
		d, err = builtinMonthName([]types.Datum{arg}, ctx)
	case 'm':
		d, err = builtinMonth([]types.Datum{arg}, ctx)
		if err == nil && !d.IsNull() {
			d.SetString(fmt.Sprintf("%02d", d.GetInt64()))
		}
	case 'c':
		d, err = builtinMonth([]types.Datum{arg}, ctx)
	case 'D':
		d, err = abbrDayOfMonth(arg, ctx)
	case 'd':
		d, err = builtinDayOfMonth([]types.Datum{arg}, ctx)
		if err == nil && !d.IsNull() {
			d.SetString(fmt.Sprintf("%02d", d.GetInt64()))
		}
	case 'e':
		d, err = builtinDayOfMonth([]types.Datum{arg}, ctx)
	case 'j':
		d, err = builtinDayOfYear([]types.Datum{arg}, ctx)
		if err == nil {
			d.SetString(fmt.Sprintf("%03d", d.GetInt64()))
		}
	case 'H', 'k':
		d, err = builtinHour([]types.Datum{arg}, ctx)
		if err == nil && b == 'H' && !d.IsNull() {
			d.SetString(fmt.Sprintf("%02d", d.GetInt64()))
		}
	case 'h', 'I', 'l':
		d, err = builtinHour([]types.Datum{arg}, ctx)
		if err == nil && !d.IsNull() {
			if d.GetInt64() > 12 {
				d.SetInt64(d.GetInt64() - 12)
			} else if d.GetInt64() == 0 {
				d.SetInt64(12)
			}
			d.SetString(fmt.Sprintf("%02d", d.GetInt64()))
		}
	case 'i':
		d, err = builtinMinute([]types.Datum{arg}, ctx)
		if err == nil && !d.IsNull() {
			d.SetString(fmt.Sprintf("%02d", d.GetInt64()))
		}
	case 'p':
		d, err = builtinHour([]types.Datum{arg}, ctx)
		if err == nil && !d.IsNull() {
			if d.GetInt64() < 12 {
				d.SetString("AM")
				break
			}
			d.SetString("PM")
		}
	case 'r':
		d, err = to12Hour(arg, ctx)
	case 'T':
		d, err = builtinTime([]types.Datum{arg}, ctx)
		if err == nil && !d.IsNull() {
			duration := types.Duration{
				Duration: d.GetMysqlDuration().Duration,
				Fsp:      0}
			d.SetMysqlDuration(duration)
		}
	case 'S', 's':
		d, err = builtinSecond([]types.Datum{arg}, ctx)
		if err == nil && !d.IsNull() {
			d.SetString(fmt.Sprintf("%02d", d.GetInt64()))
		}
	case 'f':
		d, err = builtinMicroSecond([]types.Datum{arg}, ctx)
		if err == nil && !d.IsNull() {
			d.SetString(fmt.Sprintf("%06d", d.GetInt64()))
		}
	case 'U':
		d, err = builtinWeek([]types.Datum{arg, types.NewIntDatum(0)}, ctx)
		if err == nil && !d.IsNull() {
			d.SetString(fmt.Sprintf("%02d", d.GetInt64()))
		}
	case 'u':
		d, err = builtinWeek([]types.Datum{arg, types.NewIntDatum(1)}, ctx)
		if err == nil && !d.IsNull() {
			d.SetString(fmt.Sprintf("%02d", d.GetInt64()))
		}
	case 'V':
		d, err = builtinWeek([]types.Datum{arg, types.NewIntDatum(2)}, ctx)
		if err == nil && !d.IsNull() {
			d.SetString(fmt.Sprintf("%02d", d.GetInt64()))
		}
	case 'v':
		d, err = builtinWeek([]types.Datum{arg, types.NewIntDatum(3)}, ctx)
		if err == nil && !d.IsNull() {
//.........這裏部分代碼省略.........
開發者ID:pingcap，項目名稱:tidb，代碼行數:101，代碼來源:builtin_time.go

示例5: Unflatten

// Unflatten converts a raw datum to a column datum.
func Unflatten(datum types.Datum, ft *types.FieldType, inIndex bool) (types.Datum, error) {
	if datum.IsNull() {
		return datum, nil
	}
	switch ft.Tp {
	case mysql.TypeFloat:
		datum.SetFloat32(float32(datum.GetFloat64()))
		return datum, nil
	case mysql.TypeTiny, mysql.TypeShort, mysql.TypeYear, mysql.TypeInt24,
		mysql.TypeLong, mysql.TypeLonglong, mysql.TypeDouble, mysql.TypeTinyBlob,
		mysql.TypeMediumBlob, mysql.TypeBlob, mysql.TypeLongBlob, mysql.TypeVarchar,
		mysql.TypeString:
		return datum, nil
	case mysql.TypeDate, mysql.TypeDatetime, mysql.TypeTimestamp:
		var t mysql.Time
		t.Type = ft.Tp
		t.Fsp = ft.Decimal
		var err error
		err = t.FromPackedUint(datum.GetUint64())
		if err != nil {
			return datum, errors.Trace(err)
		}
		datum.SetMysqlTime(t)
		return datum, nil
	case mysql.TypeDuration:
		dur := mysql.Duration{Duration: time.Duration(datum.GetInt64())}
		datum.SetValue(dur)
		return datum, nil
	case mysql.TypeNewDecimal:
		if datum.Kind() == types.KindMysqlDecimal {
			if ft.Decimal >= 0 {
				dec := datum.GetMysqlDecimal().Truncate(int32(ft.Decimal))
				datum.SetMysqlDecimal(dec)
			}
			return datum, nil
		}
		dec, err := mysql.ParseDecimal(datum.GetString())
		if err != nil {
			return datum, errors.Trace(err)
		}
		if ft.Decimal >= 0 {
			dec = dec.Truncate(int32(ft.Decimal))
		}
		datum.SetValue(dec)
		return datum, nil
	case mysql.TypeEnum:
		enum, err := mysql.ParseEnumValue(ft.Elems, datum.GetUint64())
		if err != nil {
			return datum, errors.Trace(err)
		}
		datum.SetValue(enum)
		return datum, nil
	case mysql.TypeSet:
		set, err := mysql.ParseSetValue(ft.Elems, datum.GetUint64())
		if err != nil {
			return datum, errors.Trace(err)
		}
		datum.SetValue(set)
		return datum, nil
	case mysql.TypeBit:
		bit := mysql.Bit{Value: datum.GetUint64(), Width: ft.Flen}
		datum.SetValue(bit)
		return datum, nil
	}
	return datum, nil
}
開發者ID:XuHuaiyu，項目名稱:tidb，代碼行數:67，代碼來源:tablecodec.go


注：本文中的github.com/pingcap/tidb/util/types.Datum.GetString方法示例由純淨天空整理自Github/MSDocs等開源代碼及文檔管理平台，相關代碼片段篩選自各路編程大神貢獻的開源項目，源碼版權歸原作者所有，傳播和使用請參考對應項目的License；未經允許，請勿轉載。