func getTimeValue(ctx context.Context, v interface{}, tp byte, fsp int) (interface{}, error) {
value := mysql.Time{
Type: tp,
Fsp: fsp,
}
defaultTime, err := getSystemTimestamp(ctx)
if err != nil {
return nil, errors.Trace(err)
}
switch x := v.(type) {
case string:
if x == CurrentTimestamp {
value.Time = defaultTime
} else if x == ZeroTimestamp {
value, _ = mysql.ParseTimeFromNum(0, tp, fsp)
} else {
value, err = mysql.ParseTime(x, tp, fsp)
if err != nil {
return nil, errors.Trace(err)
}
}
case Value:
switch xval := x.Val.(type) {
case string:
value, err = mysql.ParseTime(xval, tp, fsp)
if err != nil {
return nil, errors.Trace(err)
}
case int64:
value, err = mysql.ParseTimeFromNum(int64(xval), tp, fsp)
if err != nil {
return nil, errors.Trace(err)
}
case nil:
return nil, nil
default:
return nil, errors.Trace(errDefaultValue)
}
case *Ident:
if x.Equal(CurrentTimeExpr) {
return CurrentTimestamp, nil
}
return nil, errors.Trace(errDefaultValue)
case *UnaryOperation:
// support some expression, like `-1`
m := map[interface{}]interface{}{}
v := Eval(x, nil, m)
ft := types.NewFieldType(mysql.TypeLonglong)
xval, err := types.Convert(v, ft)
if err != nil {
return nil, errors.Trace(err)
}
value, err = mysql.ParseTimeFromNum(xval.(int64), tp, fsp)
if err != nil {
return nil, errors.Trace(err)
}
default:
return nil, nil
}
return value, nil
}
// Convert converts the val with type tp.
func Convert(val interface{}, target *FieldType) (v interface{}, err error) { //NTYPE
tp := target.Tp
if val == nil {
return nil, nil
}
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)
}
if target.Flen != 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 {
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.MinBitWidth
} else if width == mysql.UnspecifiedBitWidth {
width = mysql.MaxBitWidth
}
maxValue := uint64(1)<<uint64(width) - 1
if x > maxValue {
return maxValue, overflow(val, tp)
}
return x, 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
default:
panic("should never happen")
}
}
// CastValue casts a value based on column's type.
func (c *Col) CastValue(ctx context.Context, val interface{}) (casted interface{}, err error) {
if val == nil {
return
}
switch c.Tp {
case mysql.TypeTiny, mysql.TypeShort, mysql.TypeInt24, mysql.TypeLong, mysql.TypeLonglong, mysql.TypeYear, mysql.TypeBit:
intVal, errCode := c.normalizeIntegerValue(val)
if errCode == errCodeType {
casted = intVal
err = c.TypeError(val)
return
}
return c.castIntegerValue(intVal, errCode)
case mysql.TypeFloat, mysql.TypeDouble:
return c.castFloatValue(val)
case mysql.TypeDate, mysql.TypeDatetime, mysql.TypeTimestamp:
switch v := val.(type) {
case int64:
casted, err = mysql.ParseTimeFromNum(v, c.Tp, c.Decimal)
if err != nil {
err = newParseColError(err, c)
}
case string:
casted, err = mysql.ParseTime(v, c.Tp, c.Decimal)
if err != nil {
err = newParseColError(err, c)
}
case mysql.Time:
var t mysql.Time
t, err = v.Convert(c.Tp)
if err != nil {
err = newParseColError(err, c)
return
}
casted, err = t.RoundFrac(c.Decimal)
if err != nil {
err = newParseColError(err, c)
}
default:
err = c.TypeError(val)
}
case mysql.TypeDuration:
switch v := val.(type) {
case string:
casted, err = mysql.ParseDuration(v, c.Decimal)
if err != nil {
err = newParseColError(err, c)
}
case mysql.Time:
var t mysql.Duration
t, err = v.ConvertToDuration()
if err != nil {
err = newParseColError(err, c)
return
}
casted, err = t.RoundFrac(c.Decimal)
if err != nil {
err = newParseColError(err, c)
}
case mysql.Duration:
casted, err = v.RoundFrac(c.Decimal)
default:
err = c.TypeError(val)
}
case mysql.TypeBlob, mysql.TypeTinyBlob, mysql.TypeMediumBlob, mysql.TypeLongBlob, mysql.TypeString, mysql.TypeVarchar, mysql.TypeVarString:
strV := ""
switch v := val.(type) {
case mysql.Time:
strV = v.String()
case mysql.Duration:
strV = v.String()
case []byte:
if c.Charset == charset.CharsetBin {
casted = v
return
}
strV = string(v)
default:
strV = fmt.Sprintf("%v", val)
}
if (c.Flen != types.UnspecifiedLength) && (len(strV) > c.Flen) {
strV = strV[:c.Flen]
}
casted = strV
case mysql.TypeDecimal, mysql.TypeNewDecimal:
switch v := val.(type) {
case string:
casted, err = mysql.ParseDecimal(v)
if err != nil {
err = newParseColError(err, c)
}
case int8:
casted = mysql.NewDecimalFromInt(int64(v), 0)
case int16:
casted = mysql.NewDecimalFromInt(int64(v), 0)
case int32:
casted = mysql.NewDecimalFromInt(int64(v), 0)
case int64:
casted = mysql.NewDecimalFromInt(int64(v), 0)
case int:
casted = mysql.NewDecimalFromInt(int64(v), 0)
case uint8:
casted = mysql.NewDecimalFromUint(uint64(v), 0)
case uint16:
casted = mysql.NewDecimalFromUint(uint64(v), 0)
case uint32:
casted = mysql.NewDecimalFromUint(uint64(v), 0)
case uint64:
casted = mysql.NewDecimalFromUint(uint64(v), 0)
case uint:
casted = mysql.NewDecimalFromUint(uint64(v), 0)
case float32:
casted = mysql.NewDecimalFromFloat(float64(v))
case float64:
casted = mysql.NewDecimalFromFloat(float64(v))
case mysql.Decimal:
casted = v
}
default:
err = c.TypeError(val)
}
return
}
// Cast casts val to certain types and does not return error.
func Cast(val interface{}, target *FieldType) (v interface{}) { //NTYPE
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)
}
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)
}
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")
}
}
// 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
}
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
default:
panic("should never happen")
}
}