func dumpBinaryDateTime(t types.Time, loc *time.Location) (data []byte) {
if t.Type == mysql.TypeTimestamp && loc != nil {
t1, err := t.Time.GoTime()
if err != nil {
// TODO: Fix here.
}
t.Time = types.FromGoTime(t1.In(loc))
}
year, mon, day := t.Time.Year(), t.Time.Month(), t.Time.Day()
if t.IsZero() {
year, mon, day = 1, int(time.January), 1
}
switch t.Type {
case mysql.TypeTimestamp, mysql.TypeDatetime:
data = append(data, 11)
data = append(data, dumpUint16(uint16(year))...)
data = append(data, byte(mon), byte(day), byte(t.Time.Hour()), byte(t.Time.Minute()), byte(t.Time.Second()))
data = append(data, dumpUint32(uint32(t.Time.Microsecond()))...)
case mysql.TypeDate, mysql.TypeNewDate:
data = append(data, 4)
data = append(data, dumpUint16(uint16(year))...) //year
data = append(data, byte(mon), byte(day))
}
return
}
// 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
}
// See https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_str-to-date
func builtinStrToDate(args []types.Datum, _ context.Context) (types.Datum, error) {
date := args[0].GetString()
format := args[1].GetString()
var (
d types.Datum
t types.Time
)
succ := t.StrToDate(date, format)
if !succ {
d.SetNull()
return d, nil
}
d.SetMysqlTime(t)
return d, 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, 1)
c.Assert(err, IsNil)
var t types.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)
}
}
// See http://dev.mysql.com/doc/refman/5.7/en/date-and-time-functions.html#function_from-unixtime
func builtinFromUnixTime(args []types.Datum, ctx context.Context) (d types.Datum, err error) {
sc := ctx.GetSessionVars().StmtCtx
unixTimeStamp, err := args[0].ToDecimal(sc)
if err != nil {
return d, errors.Trace(err)
}
// 0 <= unixTimeStamp <= INT32_MAX
if unixTimeStamp.IsNegative() {
return
}
integralPart, err := unixTimeStamp.ToInt()
if err == types.ErrTruncated {
err = nil
}
if err != nil {
return d, errors.Trace(err)
}
if integralPart > int64(math.MaxInt32) {
return
}
// Split the integral part and fractional part of a decimal timestamp.
// e.g. for timestamp 12345.678,
// first get the integral part 12345,
// then (12345.678 - 12345) * (10^9) to get the decimal part and convert it to nanosecond precision.
integerDecimalTp := new(types.MyDecimal).FromInt(integralPart)
fracDecimalTp := new(types.MyDecimal)
err = types.DecimalSub(unixTimeStamp, integerDecimalTp, fracDecimalTp)
if err != nil {
return d, errors.Trace(err)
}
nano := new(types.MyDecimal).FromInt(int64(time.Second))
x := new(types.MyDecimal)
err = types.DecimalMul(fracDecimalTp, nano, x)
if err != nil {
return d, errors.Trace(err)
}
fractionalPart, err := x.ToInt() // here fractionalPart is result multiplying the original fractional part by 10^9.
if err == types.ErrTruncated {
err = nil
}
if err != nil {
return d, errors.Trace(err)
}
_, fracDigitsNumber := unixTimeStamp.PrecisionAndFrac()
fsp := fracDigitsNumber
if fracDigitsNumber > types.MaxFsp {
fsp = types.MaxFsp
}
tr, err := types.RoundFrac(time.Unix(integralPart, fractionalPart), fsp)
if err != nil {
return d, errors.Trace(err)
}
t := types.Time{
Time: types.FromGoTime(tr),
Type: mysql.TypeDatetime,
Fsp: fsp,
}
if args[0].Kind() == types.KindString { // Keep consistent with MySQL.
t.Fsp = types.MaxFsp
}
d.SetMysqlTime(t)
if len(args) == 1 {
return
}
return builtinDateFormat([]types.Datum{d, args[1]}, ctx)
}
func getTimeValue(ctx context.Context, v interface{}, tp byte, fsp int) (d types.Datum, err error) {
value := types.Time{
Type: tp,
Fsp: fsp,
}
defaultTime, err := getSystemTimestamp(ctx)
if err != nil {
return d, errors.Trace(err)
}
switch x := v.(type) {
case string:
upperX := strings.ToUpper(x)
if upperX == CurrentTimestamp {
value.Time = types.FromGoTime(defaultTime)
} else if upperX == ZeroTimestamp {
value, _ = types.ParseTimeFromNum(0, tp, fsp)
} else {
value, err = types.ParseTime(x, tp, fsp)
if err != nil {
return d, errors.Trace(err)
}
}
case *ast.ValueExpr:
switch x.Kind() {
case types.KindString:
value, err = types.ParseTime(x.GetString(), tp, fsp)
if err != nil {
return d, errors.Trace(err)
}
case types.KindInt64:
value, err = types.ParseTimeFromNum(x.GetInt64(), tp, fsp)
if err != nil {
return d, errors.Trace(err)
}
case types.KindNull:
return d, nil
default:
return d, errors.Trace(errDefaultValue)
}
case *ast.FuncCallExpr:
if x.FnName.L == currentTimestampL {
d.SetString(CurrentTimestamp)
return d, nil
}
return d, errors.Trace(errDefaultValue)
case *ast.UnaryOperationExpr:
// support some expression, like `-1`
v, err := Eval(ctx, x)
if err != nil {
return d, errors.Trace(err)
}
ft := types.NewFieldType(mysql.TypeLonglong)
xval, err := v.ConvertTo(ctx.GetSessionVars().StmtCtx, ft)
if err != nil {
return d, errors.Trace(err)
}
value, err = types.ParseTimeFromNum(xval.GetInt64(), tp, fsp)
if err != nil {
return d, errors.Trace(err)
}
default:
return d, nil
}
d.SetMysqlTime(value)
return d, nil
}
