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Golang Datum.GetValue方法代码示例

本文整理汇总了Golang中github.com/pingcap/tidb/util/types.Datum.GetValue方法的典型用法代码示例。如果您正苦于以下问题：Golang Datum.GetValue方法的具体用法？Golang Datum.GetValue怎么用？Golang Datum.GetValue使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类github.com/pingcap/tidb/util/types.Datum的用法示例。


在下文中一共展示了Datum.GetValue方法的6个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Golang代码示例。

示例1: updateFirst

func (n *finalAggregater) updateFirst(val types.Datum) error {
	ctx := n.getContext()
	if ctx.Evaluated {
		return nil
	}
	ctx.Value = val.GetValue()
	ctx.Evaluated = true
	return nil
}
开发者ID:yuyongwei，项目名称:tidb，代码行数:9，代码来源:aggregate_xapi.go

示例2: updateSum

func (n *finalAggregater) updateSum(val types.Datum, count uint64) error {
	ctx := n.getContext()
	if val.IsNull() {
		return nil
	}
	var err error
	ctx.Value, err = types.CalculateSum(ctx.Value, val.GetValue())
	if err != nil {
		return errors.Trace(err)
	}
	ctx.Count += int64(count)
	return nil
}
开发者ID:yuyongwei，项目名称:tidb，代码行数:13，代码来源:aggregate_xapi.go

示例3: computeMul

func computeMul(a, b types.Datum) (d types.Datum, err error) {
	switch a.Kind() {
	case types.KindInt64:
		switch b.Kind() {
		case types.KindInt64:
			r, err1 := types.MulInt64(a.GetInt64(), b.GetInt64())
			d.SetInt64(r)
			return d, errors.Trace(err1)
		case types.KindUint64:
			r, err1 := types.MulInteger(b.GetUint64(), a.GetInt64())
			d.SetUint64(r)
			return d, errors.Trace(err1)
		}
	case types.KindUint64:
		switch b.Kind() {
		case types.KindInt64:
			r, err1 := types.MulInteger(a.GetUint64(), b.GetInt64())
			d.SetUint64(r)
			return d, errors.Trace(err1)
		case types.KindUint64:
			r, err1 := types.MulUint64(a.GetUint64(), b.GetUint64())
			d.SetUint64(r)
			return d, errors.Trace(err1)
		}
	case types.KindFloat64:
		switch b.Kind() {
		case types.KindFloat64:
			r := a.GetFloat64() * b.GetFloat64()
			d.SetFloat64(r)
			return d, nil
		}
	case types.KindMysqlDecimal:
		switch b.Kind() {
		case types.KindMysqlDecimal:
			r := a.GetMysqlDecimal().Mul(b.GetMysqlDecimal())
			d.SetMysqlDecimal(r)
			return d, nil
		}
	}

	_, err = types.InvOp2(a.GetValue(), b.GetValue(), opcode.Mul)
	return d, errors.Trace(err)
}
开发者ID:astaxie，项目名称:tidb，代码行数:43，代码来源:evaluator_binop.go

示例4: computeMinus

func computeMinus(a, b types.Datum) (d types.Datum, err error) {
	switch a.Kind() {
	case types.KindInt64:
		switch b.Kind() {
		case types.KindInt64:
			r, err1 := types.SubInt64(a.GetInt64(), b.GetInt64())
			d.SetInt64(r)
			return d, errors.Trace(err1)
		case types.KindUint64:
			r, err1 := types.SubIntWithUint(a.GetInt64(), b.GetUint64())
			d.SetUint64(r)
			return d, errors.Trace(err1)
		}
	case types.KindUint64:
		switch b.Kind() {
		case types.KindInt64:
			r, err1 := types.SubUintWithInt(a.GetUint64(), b.GetInt64())
			d.SetUint64(r)
			return d, errors.Trace(err1)
		case types.KindUint64:
			r, err1 := types.SubUint64(a.GetUint64(), b.GetUint64())
			d.SetUint64(r)
			return d, errors.Trace(err1)
		}
	case types.KindFloat64:
		switch b.Kind() {
		case types.KindFloat64:
			r := a.GetFloat64() - b.GetFloat64()
			d.SetFloat64(r)
			return d, nil
		}
	case types.KindMysqlDecimal:
		switch b.Kind() {
		case types.KindMysqlDecimal:
			r := a.GetMysqlDecimal().Sub(b.GetMysqlDecimal())
			d.SetMysqlDecimal(r)
			return d, nil
		}
	}
	_, err = types.InvOp2(a.GetValue(), b.GetValue(), opcode.Minus)
	return d, errors.Trace(err)
}
开发者ID:astaxie，项目名称:tidb，代码行数:42，代码来源:evaluator_binop.go

示例5: computeMod

func computeMod(a, b types.Datum) (d types.Datum, err error) {
	switch a.Kind() {
	case types.KindInt64:
		x := a.GetInt64()
		switch b.Kind() {
		case types.KindInt64:
			y := b.GetInt64()
			if y == 0 {
				return d, nil
			}
			d.SetInt64(x % y)
			return d, nil
		case types.KindUint64:
			y := b.GetUint64()
			if y == 0 {
				return d, nil
			} else if x < 0 {
				d.SetInt64(-int64(uint64(-x) % y))
				// first is int64, return int64.
				return d, nil
			}
			d.SetInt64(int64(uint64(x) % y))
			return d, nil
		}
	case types.KindUint64:
		x := a.GetUint64()
		switch b.Kind() {
		case types.KindInt64:
			y := b.GetInt64()
			if y == 0 {
				return d, nil
			} else if y < 0 {
				// first is uint64, return uint64.
				d.SetUint64(uint64(x % uint64(-y)))
				return d, nil
			}
			d.SetUint64(x % uint64(y))
			return d, nil
		case types.KindUint64:
			y := b.GetUint64()
			if y == 0 {
				return d, nil
			}
			d.SetUint64(x % y)
			return d, nil
		}
	case types.KindFloat64:
		x := a.GetFloat64()
		switch b.Kind() {
		case types.KindFloat64:
			y := b.GetFloat64()
			if y == 0 {
				return d, nil
			}
			d.SetFloat64(math.Mod(x, y))
			return d, nil
		}
	case types.KindMysqlDecimal:
		x := a.GetMysqlDecimal()
		switch b.Kind() {
		case types.KindMysqlDecimal:
			y := b.GetMysqlDecimal()
			xf, _ := x.Float64()
			yf, _ := y.Float64()
			if yf == 0 {
				return d, nil
			}
			d.SetFloat64(math.Mod(xf, yf))
			return d, nil
		}
	}
	_, err = types.InvOp2(a.GetValue(), b.GetValue(), opcode.Mod)
	return d, errors.Trace(err)
}
开发者ID:astaxie，项目名称:tidb，代码行数:74，代码来源:evaluator_binop.go

示例6: convertDateFormat


//.........这里部分代码省略.........
		}
	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() {
			d.SetString(fmt.Sprintf("%02d", d.GetInt64()))
		}
	case 'a':
		d, err = builtinDayName([]types.Datum{arg}, ctx)
		if err == nil && !d.IsNull() {
			d.SetString(d.GetString()[:3])
		}
	case 'W':
		d, err = builtinDayName([]types.Datum{arg}, ctx)
	case 'w':
		d, err = builtinDayOfWeek([]types.Datum{arg}, ctx)
		if err == nil && !d.IsNull() {
			d.SetInt64(d.GetInt64() - 1)
		}
	case 'X':
		d, err = builtinYearWeek([]types.Datum{arg, types.NewIntDatum(2)}, ctx)
		if err == nil && !d.IsNull() {
			if d.GetInt64() == math.MaxUint32 {
				break
			}
			str := fmt.Sprintf("%04d", d.GetInt64())
			d.SetString(fmt.Sprintf("%04s", str[:4]))
		}
	case 'x':
		d, err = builtinYearWeek([]types.Datum{arg, types.NewIntDatum(3)}, ctx)
		if err == nil && !d.IsNull() {
			if d.GetInt64() == math.MaxUint32 {
				break
			}
			str := fmt.Sprintf("%04d", d.GetInt64())
			d.SetString(fmt.Sprintf("%04s", str[:4]))
		}
	case 'Y':
		d, err = builtinYear([]types.Datum{arg}, ctx)
		if err == nil && !d.IsNull() {
			d.SetString(fmt.Sprintf("%04d", d.GetInt64()))
		}
	case 'y':
		d, err = builtinYear([]types.Datum{arg}, ctx)
		if err == nil && !d.IsNull() {
			str := fmt.Sprintf("%04d", d.GetInt64())
			d.SetString(fmt.Sprintf("%02s", str[2:]))
		}
	default:
		d.SetString(string(b))
	}

	if err == nil && !d.IsNull() {
		d.SetString(fmt.Sprintf("%v", d.GetValue()))
	}
	return d, errors.Trace(err)
}
开发者ID:pingcap，项目名称:tidb，代码行数:101，代码来源:builtin_time.go


注：本文中的github.com/pingcap/tidb/util/types.Datum.GetValue方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。