Esempio n. 1
0
func (t *Table) unflatten(rec interface{}, col *column.Col) (interface{}, error) {
	if rec == nil {
		return nil, nil
	}
	switch col.Tp {
	case mysql.TypeFloat:
		return float32(rec.(float64)), 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 rec, nil
	case mysql.TypeDate, mysql.TypeDatetime, mysql.TypeTimestamp:
		var t mysql.Time
		t.Type = col.Tp
		t.Fsp = col.Decimal
		err := t.Unmarshal(rec.([]byte))
		if err != nil {
			return nil, errors.Trace(err)
		}
		return t, nil
	case mysql.TypeDuration:
		return mysql.Duration{Duration: time.Duration(rec.(int64)), Fsp: col.Decimal}, nil
	case mysql.TypeNewDecimal, mysql.TypeDecimal:
		return mysql.ParseDecimal(string(rec.([]byte)))
	case mysql.TypeEnum:
		return mysql.ParseEnumValue(col.Elems, rec.(uint64))
	case mysql.TypeSet:
		return mysql.ParseSetValue(col.Elems, rec.(uint64))
	case mysql.TypeBit:
		return mysql.Bit{Value: rec.(uint64), Width: col.Flen}, nil
	}
	log.Error(col.Tp, rec, reflect.TypeOf(rec))
	return nil, nil
}
Esempio n. 2
0
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
}
Esempio n. 3
0
// 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.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
}
Esempio n. 4
0
func (d *Datum) convertToMysqlSet(target *FieldType) (Datum, error) {
	var (
		ret Datum
		s   mysql.Set
		err error
	)
	switch d.k {
	case KindString, KindBytes:
		s, err = mysql.ParseSetName(target.Elems, d.GetString())
	default:
		var uintDatum Datum
		uintDatum, err = d.convertToUint(target)
		if err != nil {
			return ret, errors.Trace(err)
		}
		s, err = mysql.ParseSetValue(target.Elems, uintDatum.GetUint64())
	}

	if err != nil {
		return invalidConv(d, target.Tp)
	}
	ret.SetValue(s)
	return ret, nil
}
Esempio n. 5
0
// Convert converts the val with type tp.
func Convert(val interface{}, target *FieldType) (v interface{}, err error) {
	tp := target.Tp
	if val == nil {
		return nil, nil
	}
	vdi, ok := val.(*DataItem)
	if ok {
		return Convert(vdi.Data, target)
	}
	switch tp { // TODO: implement mysql types convert when "CAST() AS" syntax are supported.
	case mysql.TypeFloat:
		x, err := ToFloat64(val)
		if err != nil {
			return invConv(val, tp)
		}
		// For float and following double type, we will only truncate it for float(M, D) format.
		// If no D is set, we will handle it like origin float whether M is set or not.
		if target.Flen != UnspecifiedLength && target.Decimal != UnspecifiedLength {
			x, err = TruncateFloat(x, target.Flen, target.Decimal)
			if err != nil {
				return nil, errors.Trace(err)
			}
		}
		return float32(x), nil
	case mysql.TypeDouble:
		x, err := ToFloat64(val)
		if err != nil {
			return invConv(val, tp)
		}
		if target.Flen != UnspecifiedLength && target.Decimal != UnspecifiedLength {
			x, err = TruncateFloat(x, target.Flen, target.Decimal)
			if err != nil {
				return nil, errors.Trace(err)
			}
		}
		return float64(x), nil
	case mysql.TypeBlob, mysql.TypeTinyBlob, mysql.TypeMediumBlob, mysql.TypeLongBlob,
		mysql.TypeString, mysql.TypeVarchar, mysql.TypeVarString:
		x, err := ToString(val)
		if err != nil {
			return invConv(val, tp)
		}
		// TODO: consider target.Charset/Collate
		x = truncateStr(x, target.Flen)
		if target.Charset == charset.CharsetBin {
			return []byte(x), nil
		}
		return x, nil
	case mysql.TypeDuration:
		fsp := mysql.DefaultFsp
		if target.Decimal != UnspecifiedLength {
			fsp = target.Decimal
		}
		switch x := val.(type) {
		case mysql.Duration:
			return x.RoundFrac(fsp)
		case mysql.Time:
			t, err := x.ConvertToDuration()
			if err != nil {
				return nil, errors.Trace(err)
			}

			return t.RoundFrac(fsp)
		case string:
			return mysql.ParseDuration(x, fsp)
		default:
			return invConv(val, tp)
		}
	case mysql.TypeTimestamp, mysql.TypeDatetime, mysql.TypeDate:
		fsp := mysql.DefaultFsp
		if target.Decimal != UnspecifiedLength {
			fsp = target.Decimal
		}
		switch x := val.(type) {
		case mysql.Time:
			t, err := x.Convert(tp)
			if err != nil {
				return nil, errors.Trace(err)
			}
			return t.RoundFrac(fsp)
		case mysql.Duration:
			t, err := x.ConvertToTime(tp)
			if err != nil {
				return nil, errors.Trace(err)
			}
			return t.RoundFrac(fsp)
		case string:
			return mysql.ParseTime(x, tp, fsp)
		case int64:
			return mysql.ParseTimeFromNum(x, tp, fsp)
		default:
			return invConv(val, tp)
		}
	case mysql.TypeTiny, mysql.TypeShort, mysql.TypeInt24, mysql.TypeLong, mysql.TypeLonglong:
		unsigned := mysql.HasUnsignedFlag(target.Flag)
		if unsigned {
			return convertToUint(val, target)
		}
		return convertToInt(val, target)
	case mysql.TypeBit:
		x, err := convertToUint(val, target)
		if err != nil {
			return x, errors.Trace(err)
		}

		// check bit boundary, if bit has n width, the boundary is
		// in [0, (1 << n) - 1]
		width := target.Flen
		if width == 0 || width == mysql.UnspecifiedBitWidth {
			width = mysql.MinBitWidth
		}

		maxValue := uint64(1)<<uint64(width) - 1

		if x > maxValue {
			return maxValue, overflow(val, tp)
		}
		return mysql.Bit{Value: x, Width: width}, nil
	case mysql.TypeDecimal, mysql.TypeNewDecimal:
		x, err := ToDecimal(val)
		if err != nil {
			return invConv(val, tp)
		}
		if target.Decimal != UnspecifiedLength {
			x = x.Round(int32(target.Decimal))
		}
		// TODO: check Flen
		return x, nil
	case mysql.TypeYear:
		var (
			intVal int64
			err    error
		)
		switch x := val.(type) {
		case string:
			intVal, err = StrToInt(x)
		case mysql.Time:
			return int64(x.Year()), nil
		case mysql.Duration:
			return int64(time.Now().Year()), nil
		default:
			intVal, err = ToInt64(x)
		}
		if err != nil {
			return invConv(val, tp)
		}
		y, err := mysql.AdjustYear(int(intVal))
		if err != nil {
			return invConv(val, tp)
		}
		return int64(y), nil
	case mysql.TypeEnum:
		var (
			e   mysql.Enum
			err error
		)
		switch x := val.(type) {
		case string:
			e, err = mysql.ParseEnumName(target.Elems, x)
		case []byte:
			e, err = mysql.ParseEnumName(target.Elems, string(x))
		default:
			var number uint64
			number, err = ToUint64(x)
			if err != nil {
				return nil, errors.Trace(err)
			}
			e, err = mysql.ParseEnumValue(target.Elems, number)
		}

		if err != nil {
			return invConv(val, tp)
		}
		return e, nil
	case mysql.TypeSet:
		var (
			s   mysql.Set
			err error
		)
		switch x := val.(type) {
		case string:
			s, err = mysql.ParseSetName(target.Elems, x)
		case []byte:
			s, err = mysql.ParseSetName(target.Elems, string(x))
		default:
			var number uint64
			number, err = ToUint64(x)
			if err != nil {
				return nil, errors.Trace(err)
			}
			s, err = mysql.ParseSetValue(target.Elems, number)
		}

		if err != nil {
			return invConv(val, tp)
		}
		return s, nil
	case mysql.TypeNull:
		return nil, nil
	default:
		panic("should never happen")
	}
}