func getZeroValue(col *model.ColumnInfo) types.Datum { var d types.Datum switch col.Tp { case mysql.TypeTiny, mysql.TypeInt24, mysql.TypeShort, mysql.TypeLong, mysql.TypeLonglong, mysql.TypeYear: if mysql.HasUnsignedFlag(col.Flag) { d.SetUint64(0) } else { d.SetInt64(0) } case mysql.TypeFloat: d.SetFloat32(0) case mysql.TypeDouble: d.SetFloat64(0) case mysql.TypeNewDecimal: d.SetMysqlDecimal(mysql.NewDecimalFromInt(0, 0)) case mysql.TypeString, mysql.TypeVarString, mysql.TypeVarchar: d.SetString("") case mysql.TypeBlob, mysql.TypeTinyBlob, mysql.TypeMediumBlob, mysql.TypeLongBlob: d.SetBytes([]byte{}) case mysql.TypeDuration: d.SetMysqlDuration(mysql.ZeroDuration) case mysql.TypeDate, mysql.TypeNewDate: d.SetMysqlTime(mysql.ZeroDate) case mysql.TypeTimestamp: d.SetMysqlTime(mysql.ZeroTimestamp) case mysql.TypeDatetime: d.SetMysqlTime(mysql.ZeroDatetime) case mysql.TypeBit: d.SetMysqlBit(mysql.Bit{Value: 0, Width: mysql.MinBitWidth}) case mysql.TypeSet: d.SetMysqlSet(mysql.Set{}) } return d }
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 }
func (e *Evaluator) evalFloat(val []byte, f32 bool) (types.Datum, error) { var d types.Datum _, f, err := codec.DecodeFloat(val) if err != nil { return d, ErrInvalid.Gen("invalid float % x", val) } if f32 { d.SetFloat32(float32(f)) } else { d.SetFloat64(f) } return d, nil }
// 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 types.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 := types.Duration{Duration: time.Duration(datum.GetInt64())} datum.SetValue(dur) return datum, nil case mysql.TypeEnum: enum, err := types.ParseEnumValue(ft.Elems, datum.GetUint64()) if err != nil { return datum, errors.Trace(err) } datum.SetValue(enum) return datum, nil case mysql.TypeSet: set, err := types.ParseSetValue(ft.Elems, datum.GetUint64()) if err != nil { return datum, errors.Trace(err) } datum.SetValue(set) return datum, nil case mysql.TypeBit: bit := types.Bit{Value: datum.GetUint64(), Width: ft.Flen} datum.SetValue(bit) return datum, nil } return datum, nil }