func (s *testTypeConvertSuite) TestConvertToString(c *C) {
testToString(c, "0", "0")
testToString(c, true, "1")
testToString(c, "false", "false")
testToString(c, int(0), "0")
testToString(c, int8(0), "0")
testToString(c, int16(0), "0")
testToString(c, int32(0), "0")
testToString(c, int64(0), "0")
testToString(c, uint(0), "0")
testToString(c, uint8(0), "0")
testToString(c, uint16(0), "0")
testToString(c, uint32(0), "0")
testToString(c, uint64(0), "0")
testToString(c, float32(1.6), "1.6")
testToString(c, float64(-0.6), "-0.6")
testToString(c, []byte{1}, "\x01")
t, err := mysql.ParseTime("2011-11-10 11:11:11.999999", mysql.TypeTimestamp, 6)
c.Assert(err, IsNil)
testToString(c, t, "2011-11-10 11:11:11.999999")
td, err := mysql.ParseDuration("11:11:11.999999", 6)
c.Assert(err, IsNil)
testToString(c, td, "11:11:11.999999")
ft := NewFieldType(mysql.TypeNewDecimal)
ft.Decimal = 5
v, err := Convert(3.1415926, ft)
c.Assert(err, IsNil)
testToString(c, v, "3.14159")
_, err = ToString(&invalidMockType{})
c.Assert(err, NotNil)
}
func (s *testTypeConvertSuite) TestConvertToString(c *C) {
testToString(c, "0", "0")
testToString(c, true, "1")
testToString(c, "false", "false")
testToString(c, int(0), "0")
testToString(c, int64(0), "0")
testToString(c, uint64(0), "0")
testToString(c, float32(1.6), "1.6")
testToString(c, float64(-0.6), "-0.6")
testToString(c, []byte{1}, "\x01")
testToString(c, mysql.Hex{Value: 0x4D7953514C}, "MySQL")
testToString(c, mysql.Bit{Value: 0x41, Width: 8}, "A")
testToString(c, mysql.Enum{Name: "a", Value: 1}, "a")
testToString(c, mysql.Set{Name: "a", Value: 1}, "a")
t, err := mysql.ParseTime("2011-11-10 11:11:11.999999", mysql.TypeTimestamp, 6)
c.Assert(err, IsNil)
testToString(c, t, "2011-11-10 11:11:11.999999")
td, err := mysql.ParseDuration("11:11:11.999999", 6)
c.Assert(err, IsNil)
testToString(c, td, "11:11:11.999999")
ft := NewFieldType(mysql.TypeNewDecimal)
ft.Decimal = 5
v, err := Convert(3.1415926, ft)
c.Assert(err, IsNil)
testToString(c, v, "3.14159")
_, err = ToString(&invalidMockType{})
c.Assert(err, NotNil)
}
func (s *testTypeConvertSuite) TestConvertToFloat64(c *C) {
testToFloat64(c, "0", float64(0))
testToFloat64(c, false, float64(0))
testToFloat64(c, true, float64(1))
testToFloat64(c, int(0), float64(0))
testToFloat64(c, int8(0), float64(0))
testToFloat64(c, int16(0), float64(0))
testToFloat64(c, int32(0), float64(0))
testToFloat64(c, int64(0), float64(0))
testToFloat64(c, uint(0), float64(0))
testToFloat64(c, uint8(0), float64(0))
testToFloat64(c, uint16(0), float64(0))
testToFloat64(c, uint32(0), float64(0))
testToFloat64(c, uint64(0), float64(0))
// TODO: check this
//testToFloat64(c, float32(3.1), float64(3.1))
testToFloat64(c, float64(3.1), float64(3.1))
t, err := mysql.ParseTime("2011-11-10 11:11:11.999999", mysql.TypeTimestamp, 6)
c.Assert(err, IsNil)
testToFloat64(c, t, float64(20111110111111.999999))
td, err := mysql.ParseDuration("11:11:11.999999", 6)
c.Assert(err, IsNil)
testToFloat64(c, td, float64(111111.999999))
ft := NewFieldType(mysql.TypeNewDecimal)
ft.Decimal = 5
v, err := Convert(3.1415926, ft)
c.Assert(err, IsNil)
testToFloat64(c, v, float64(3.14159))
_, err = ToFloat64(&invalidMockType{})
c.Assert(err, NotNil)
}
func (s *testTypeConvertSuite) TestConvertToBool(c *C) {
testToBool(c, int(0), 0)
testToBool(c, int64(0), 0)
testToBool(c, uint64(0), 0)
testToBool(c, float32(0), 0)
testToBool(c, float64(0), 0)
testToBool(c, "", 0)
testToBool(c, "0", 0)
testToBool(c, []byte{}, 0)
testToBool(c, []byte("0"), 0)
testToBool(c, mysql.Hex{Value: 0}, 0)
testToBool(c, mysql.Bit{Value: 0, Width: 8}, 0)
testToBool(c, mysql.Enum{Name: "a", Value: 1}, 1)
testToBool(c, mysql.Set{Name: "a", Value: 1}, 1)
t, err := mysql.ParseTime("2011-11-10 11:11:11.999999", mysql.TypeTimestamp, 6)
c.Assert(err, IsNil)
testToBool(c, t, 1)
td, err := mysql.ParseDuration("11:11:11.999999", 6)
c.Assert(err, IsNil)
testToBool(c, td, 1)
ft := NewFieldType(mysql.TypeNewDecimal)
ft.Decimal = 5
v, err := Convert(3.1415926, ft)
c.Assert(err, IsNil)
testToBool(c, v, 1)
_, err = ToBool(&invalidMockType{})
c.Assert(err, NotNil)
}
func (s *testTypeConvertSuite) TestConvertToFloat64(c *C) {
testToFloat64(c, "0", float64(0))
testToFloat64(c, int(0), float64(0))
testToFloat64(c, int64(0), float64(0))
testToFloat64(c, uint64(0), float64(0))
// TODO: check this
//testToFloat64(c, float32(3.1), float64(3.1))
testToFloat64(c, float64(3.1), float64(3.1))
testToFloat64(c, mysql.Hex{Value: 100}, float64(100))
testToFloat64(c, mysql.Bit{Value: 100, Width: 8}, float64(100))
testToFloat64(c, mysql.Enum{Name: "a", Value: 1}, float64(1))
testToFloat64(c, mysql.Set{Name: "a", Value: 1}, float64(1))
t, err := mysql.ParseTime("2011-11-10 11:11:11.999999", mysql.TypeTimestamp, 6)
c.Assert(err, IsNil)
testToFloat64(c, t, float64(20111110111111.999999))
td, err := mysql.ParseDuration("11:11:11.999999", 6)
c.Assert(err, IsNil)
testToFloat64(c, td, float64(111111.999999))
ft := NewFieldType(mysql.TypeNewDecimal)
ft.Decimal = 5
v, err := Convert(3.1415926, ft)
c.Assert(err, IsNil)
testToFloat64(c, v, float64(3.14159))
_, err = ToFloat64(&invalidMockType{})
c.Assert(err, NotNil)
}
func (s *testTypeConvertSuite) TestConvertToInt64(c *C) {
testToInt64(c, "0", int64(0))
testToInt64(c, int(0), int64(0))
testToInt64(c, int64(0), int64(0))
testToInt64(c, uint64(0), int64(0))
testToInt64(c, float32(3.1), int64(3))
testToInt64(c, float64(3.1), int64(3))
testToInt64(c, mysql.Hex{Value: 100}, int64(100))
testToInt64(c, mysql.Bit{Value: 100, Width: 8}, int64(100))
t, err := mysql.ParseTime("2011-11-10 11:11:11.999999", mysql.TypeTimestamp, 0)
c.Assert(err, IsNil)
testToInt64(c, t, int64(20111110111112))
td, err := mysql.ParseDuration("11:11:11.999999", 6)
c.Assert(err, IsNil)
testToInt64(c, td, int64(111112))
ft := NewFieldType(mysql.TypeNewDecimal)
ft.Decimal = 5
v, err := Convert(3.1415926, ft)
c.Assert(err, IsNil)
testToInt64(c, v, int64(3))
_, err = ToInt64(&invalidMockType{})
c.Assert(err, NotNil)
}
func (s *testUtilSuite) TestDumpBinaryTime(c *C) {
t, err := mysql.ParseTimestamp("0000-00-00 00:00:00.0000000")
c.Assert(err, IsNil)
d := dumpBinaryDateTime(t, nil)
c.Assert(d, DeepEquals, []byte{11, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0})
t, err = mysql.ParseDatetime("0000-00-00 00:00:00.0000000")
c.Assert(err, IsNil)
d = dumpBinaryDateTime(t, nil)
c.Assert(d, DeepEquals, []byte{11, 1, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0})
t, err = mysql.ParseDate("0000-00-00")
c.Assert(err, IsNil)
d = dumpBinaryDateTime(t, nil)
c.Assert(d, DeepEquals, []byte{4, 1, 0, 1, 1})
myDuration, err := mysql.ParseDuration("0000-00-00 00:00:00.0000000", 6)
c.Assert(err, IsNil)
d = dumpBinaryTime(myDuration.Duration)
c.Assert(d, DeepEquals, []byte{0})
}
func (s *testTypeConvertSuite) TestConvertToBool(c *C) {
testToBool(c, false, int8(0))
testToBool(c, int(0), int8(0))
testToBool(c, int8(0), int8(0))
testToBool(c, int16(0), int8(0))
testToBool(c, int32(0), int8(0))
testToBool(c, int64(0), int8(0))
testToBool(c, uint(0), int8(0))
testToBool(c, uint8(0), int8(0))
testToBool(c, uint16(0), int8(0))
testToBool(c, uint32(0), int8(0))
testToBool(c, uint64(0), int8(0))
testToBool(c, float32(0), int8(0))
testToBool(c, float64(0), int8(0))
testToBool(c, "", int8(0))
testToBool(c, "0", int8(0))
testToBool(c, []byte{}, int8(0))
testToBool(c, []byte("0"), int8(0))
t, err := mysql.ParseTime("2011-11-10 11:11:11.999999", mysql.TypeTimestamp, 6)
c.Assert(err, IsNil)
testToBool(c, t, int8(1))
td, err := mysql.ParseDuration("11:11:11.999999", 6)
c.Assert(err, IsNil)
testToBool(c, td, int8(1))
ft := NewFieldType(mysql.TypeNewDecimal)
ft.Decimal = 5
v, err := Convert(3.1415926, ft)
c.Assert(err, IsNil)
testToBool(c, v, int8(1))
_, err = ToBool(&invalidMockType{})
c.Assert(err, NotNil)
}
// 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.TypeString:
x, err := ToString(val)
if err != nil {
return InvConv(val, tp)
}
// TODO: consider target.Charset/Collate
x = truncateStr(x, target.Flen)
return x, nil
case mysql.TypeBlob:
x, err := ToString(val)
if err != nil {
return InvConv(val, tp)
}
x = truncateStr(x, target.Flen)
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)
default:
return InvConv(val, tp)
}
case mysql.TypeLonglong:
x, err := ToInt64(val)
if err != nil {
return InvConv(val, tp)
}
return x, nil
case 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
default:
panic("should never happen")
}
}
// 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")
}
}
// 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")
}
}
func parseDuration(c *C, s string) mysql.Duration {
m, err := mysql.ParseDuration(s, mysql.DefaultFsp)
c.Assert(err, IsNil)
return m
}
// 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.TypeString:
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.TypeBlob:
x, err := ToString(val)
if err != nil {
return InvConv(val, tp)
}
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)
default:
return InvConv(val, tp)
}
case mysql.TypeLonglong:
x, err := ToInt64(val)
if err != nil {
return InvConv(val, tp)
}
// TODO: We should first convert to uint64 then check unsigned flag.
if mysql.HasUnsignedFlag(target.Flag) {
return uint64(x), nil
}
return x, nil
case 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 int16(x.Year()), nil
case mysql.Duration:
return int16(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 int16(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
}
// 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")
}
}