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
}
// 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
}
func (s *testCodecSuite) TestTime(c *C) {
defer testleak.AfterTest(c)()
tbl := []string{
"2011-01-01 00:00:00",
"2011-01-01 00:00:00",
"0001-01-01 00:00:00",
}
for _, t := range tbl {
m := types.NewDatum(parseTime(c, t))
b, err := EncodeKey(nil, m)
c.Assert(err, IsNil)
v, err := Decode(b)
c.Assert(err, IsNil)
var t mysql.Time
t.Type = mysql.TypeDatetime
t.FromPackedUint(v[0].GetUint64())
c.Assert(types.NewDatum(t), DeepEquals, m)
}
tblCmp := []struct {
Arg1 string
Arg2 string
Ret int
}{
{"2011-10-10 00:00:00", "2000-12-12 11:11:11", 1},
{"2000-10-10 00:00:00", "2001-10-10 00:00:00", -1},
{"2000-10-10 00:00:00", "2000-10-10 00:00:00", 0},
}
for _, t := range tblCmp {
m1 := types.NewDatum(parseTime(c, t.Arg1))
m2 := types.NewDatum(parseTime(c, t.Arg2))
b1, err := EncodeKey(nil, m1)
c.Assert(err, IsNil)
b2, err := EncodeKey(nil, m2)
c.Assert(err, IsNil)
ret := bytes.Compare(b1, b2)
c.Assert(ret, Equals, t.Ret)
}
}
// Cast casts val to certain types and does not return error.
func Cast(val interface{}, target *FieldType) (v interface{}) {
tp := target.Tp
switch tp {
case mysql.TypeString:
x, _ := ToString(val)
// TODO: consider target.Charset/Collate
x = truncateStr(x, target.Flen)
if target.Charset == charset.CharsetBin {
return []byte(x)
}
return x
case mysql.TypeDuration:
var dur mysql.Duration
fsp := mysql.DefaultFsp
if target.Decimal != UnspecifiedLength {
fsp = target.Decimal
}
switch x := val.(type) {
case mysql.Duration:
dur, _ = x.RoundFrac(fsp)
case mysql.Time:
dur, _ = x.ConvertToDuration()
dur, _ = dur.RoundFrac(fsp)
case string:
dur, _ = mysql.ParseDuration(x, fsp)
case *DataItem:
return Cast(x.Data, target)
}
return dur
case mysql.TypeDatetime, mysql.TypeDate:
fsp := mysql.DefaultFsp
if target.Decimal != UnspecifiedLength {
fsp = target.Decimal
}
var t mysql.Time
t.Type = tp
switch x := val.(type) {
case mysql.Time:
t, _ = x.Convert(tp)
t, _ = t.RoundFrac(fsp)
case mysql.Duration:
t, _ = x.ConvertToTime(tp)
t, _ = t.RoundFrac(fsp)
case string:
t, _ = mysql.ParseTime(x, tp, fsp)
case int64:
t, _ = mysql.ParseTimeFromNum(x, tp, fsp)
case *DataItem:
return Cast(x.Data, target)
}
return t
case mysql.TypeLonglong:
if mysql.HasUnsignedFlag(target.Flag) {
v, _ = ToUint64(val)
} else {
v, _ = ToInt64(val)
}
return
case mysql.TypeNewDecimal:
x, _ := ToDecimal(val)
if target.Decimal != UnspecifiedLength {
x = x.Round(int32(target.Decimal))
}
// TODO: check Flen
return x
default:
panic("should never happen")
}
}
