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Merge pull request #952 from pingcap/coocood/datum-convert

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*: replace interface{} with Datum in convert.
This commit is contained in:
Ewan Chou
2016-03-07 14:31:39 +08:00
parent 085d94c7b1 ac12b71714
commit 9cd548dfda
10 changed files with 493 additions and 327 deletions
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6
column/column.go
View File

@ -94,12 +94,12 @@ func FindOnUpdateCols(cols []*Col) []*Col {
// CastValues casts values based on columns type.
func CastValues(ctx context.Context, rec []types.Datum, cols []*Col) (err error) {
for _, c := range cols {
var val interface{}
val, err = types.Convert(rec[c.Offset].GetValue(), &c.FieldType)
var converted types.Datum
converted, err = rec[c.Offset].ConvertTo(&c.FieldType)
if err != nil {
return errors.Trace(err)
}
rec[c.Offset].SetValue(val)
rec[c.Offset] = converted
}
return nil
}

5
ddl/column.go
View File

@ -24,7 +24,6 @@ import (
"github.com/pingcap/tidb/table"
"github.com/pingcap/tidb/table/tables"
"github.com/pingcap/tidb/terror"
"github.com/pingcap/tidb/util/types"
)
func (d *ddl) adjustColumnOffset(columns []*model.ColumnInfo, indices []*model.IndexInfo, offset int, added bool) {
@ -368,7 +367,7 @@ func (d *ddl) backfillColumnData(t table.Table, columnInfo *model.ColumnInfo, ha
}
// must convert to the column field type.
v, err := types.Convert(value.GetValue(), &columnInfo.FieldType)
v, err := value.ConvertTo(&columnInfo.FieldType)
if err != nil {
return errors.Trace(err)
}
@ -378,7 +377,7 @@ func (d *ddl) backfillColumnData(t table.Table, columnInfo *model.ColumnInfo, ha
return errors.Trace(err)
}
err = tables.SetColValue(txn, backfillKey, types.NewDatum(v))
err = tables.SetColValue(txn, backfillKey, v)
if err != nil {
return errors.Trace(err)
}

2
ddl/column_test.go
View File

@ -266,7 +266,7 @@ func (s *testColumnSuite) checkColumnKVExist(c *C, ctx context.Context, t table.
c.Assert(err, IsNil)
v, err1 := tables.DecodeValue(data, &col.FieldType)
c.Assert(err1, IsNil)
value, err1 := types.Convert(v, &col.FieldType)
value, err1 := v.ConvertTo(&col.FieldType)
c.Assert(err1, IsNil)
c.Assert(value, Equals, columnValue)
} else {

12
executor/executor.go
View File

@ -340,13 +340,11 @@ func (e *IndexRangeExec) Next() (*Row, error) {
if e.iter == nil {
seekVals := make([]types.Datum, len(e.scan.idx.Columns))
for i := 0; i < len(e.lowVals); i++ {
var err error
if e.lowVals[i].Kind() == types.KindMinNotNull {
seekVals[i].SetBytes([]byte{})
} else {
var val interface{}
val, err = types.Convert(e.lowVals[i].GetValue(), e.scan.valueTypes[i])
seekVals[i].SetValue(val)
val, err := e.lowVals[i].ConvertTo(e.scan.valueTypes[i])
seekVals[i] = val
if err != nil {
return nil, errors.Trace(err)
}
@ -1091,12 +1089,12 @@ func (e *UnionExec) Next() (*Row, error) {
for i := range row.Data {
// The column value should be casted as the same type of the first select statement in corresponding position
rf := e.fields[i]
val := row.Data[i].GetValue()
val, err = types.Convert(val, &rf.Column.FieldType)
var val types.Datum
val, err = row.Data[i].ConvertTo(&rf.Column.FieldType)
if err != nil {
return nil, errors.Trace(err)
}
row.Data[i].SetValue(val)
row.Data[i] = val
}
}
for i, v := range row.Data {

6
mysql/time.go
View File

@ -518,9 +518,9 @@ func adjustYear(y int) int {
}
// AdjustYear is used for adjusting year and checking its validation.
func AdjustYear(y int) (int, error) {
y = adjustYear(y)
if y < int(MinYear) || y > int(MaxYear) {
func AdjustYear(y int64) (int64, error) {
y = int64(adjustYear(int(y)))
if y < int64(MinYear) || y > int64(MaxYear) {
return 0, errors.Trace(ErrInvalidYear)
}

2
mysql/time_test.go
View File

@ -269,7 +269,7 @@ func (s *testTimeSuite) TestYear(c *C) {
}
valids := []struct {
Year int
Year int64
Expect bool
}{
{2000, true},

4
table/tables/tables.go
View File

@ -331,12 +331,10 @@ func (t *Table) AddRecord(ctx context.Context, r []types.Datum) (recordID int64,
if err != nil {
return 0, errors.Trace(err)
}
var inVal interface{}
inVal, err = types.Convert(value.GetValue(), &col.FieldType)
value, err = value.ConvertTo(&col.FieldType)
if err != nil {
return 0, errors.Trace(err)
}
value.SetValue(inVal)
} else {
value = r[col.Offset]
}

299
util/types/convert.go
View File

@ -21,12 +21,10 @@ import (
"math"
"strconv"
"strings"
"time"
"unicode"
"github.com/juju/errors"
"github.com/pingcap/tidb/mysql"
"github.com/pingcap/tidb/util/charset"
)
// InvConv returns a failed convertion error.
@ -48,6 +46,8 @@ var unsignedUpperBound = map[byte]uint64{
mysql.TypeLong: math.MaxUint32,
mysql.TypeLonglong: math.MaxUint64,
mysql.TypeBit: math.MaxUint64,
mysql.TypeEnum: math.MaxUint64,
mysql.TypeSet: math.MaxUint64,
}
var signedUpperBound = map[byte]int64{
@ -188,60 +188,6 @@ func convertFloatToUint(val float64, upperBound uint64, tp byte) (uint64, error)
return uint64(val), nil
}
func convertToUint(val interface{}, target *FieldType) (uint64, error) {
tp := target.Tp
upperBound := unsignedUpperBound[tp]
switch v := val.(type) {
case bool:
if v {
return 1, nil
}
return 0, nil
case uint64:
return convertUintToUint(v, upperBound, tp)
case int:
return convertIntToUint(int64(v), upperBound, tp)
case int64:
return convertIntToUint(int64(v), upperBound, tp)
case float32:
return convertFloatToUint(float64(v), upperBound, tp)
case float64:
return convertFloatToUint(float64(v), upperBound, tp)
case string:
fval, err := StrToFloat(v)
if err != nil {
return 0, errors.Trace(err)
}
return convertFloatToUint(float64(fval), upperBound, tp)
case []byte:
fval, err := StrToFloat(string(v))
if err != nil {
return 0, errors.Trace(err)
}
return convertFloatToUint(float64(fval), upperBound, tp)
case mysql.Time:
// 2011-11-10 11:11:11.999999 -> 20111110111112
ival := v.ToNumber().Round(0).IntPart()
return convertIntToUint(ival, upperBound, tp)
case mysql.Duration:
// 11:11:11.999999 -> 111112
ival := v.ToNumber().Round(0).IntPart()
return convertIntToUint(ival, upperBound, tp)
case mysql.Decimal:
fval, _ := v.Float64()
return convertFloatToUint(fval, upperBound, tp)
case mysql.Hex:
return convertFloatToUint(v.ToNumber(), upperBound, tp)
case mysql.Bit:
return convertFloatToUint(v.ToNumber(), upperBound, tp)
case mysql.Enum:
return convertFloatToUint(v.ToNumber(), upperBound, tp)
case mysql.Set:
return convertFloatToUint(v.ToNumber(), upperBound, tp)
}
return 0, typeError(val, target)
}
// typeError returns error for invalid value type.
func typeError(v interface{}, target *FieldType) error {
return errors.Errorf("cannot use %v (type %T) in assignment to, or comparison with, column type %s)",
@ -268,209 +214,12 @@ func Cast(val interface{}, target *FieldType) (interface{}, error) {
// 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)
case []byte:
return mysql.ParseDuration(string(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 []byte:
return mysql.ParseTime(string(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 []byte:
intVal, err = StrToInt(string(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
case mysql.TypeNull:
return nil, nil
default:
panic("should never happen")
d := NewDatum(val)
ret, err := d.ConvertTo(target)
if err != nil {
return ret.GetValue(), errors.Trace(err)
}
return ret.GetValue(), nil
}
// StrToInt converts a string to an integer in best effort.
@ -502,35 +251,6 @@ func StrToInt(str string) (int64, error) {
return r, nil
}
// StrToUint converts a string to an unsigned integer in best effort.
// TODO: handle overflow and add unittest.
func StrToUint(str string) (uint64, error) {
str = strings.TrimSpace(str)
if len(str) == 0 {
return uint64(0), nil
}
i := 0
if str[i] == '-' {
// TODO: return an error.
v, err := StrToInt(str)
if err != nil {
return uint64(0), err
}
return uint64(v), nil
} else if str[i] == '+' {
i++
}
r := uint64(0)
for ; i < len(str); i++ {
if !unicode.IsDigit(rune(str[i])) {
break
}
r = r*10 + uint64(str[i]-'0')
}
// TODO: if i < len(str), we should return an error.
return r, nil
}
// StrToFloat converts a string to a float64 in best effort.
func StrToFloat(str string) (float64, error) {
str = strings.TrimSpace(str)
@ -544,11 +264,6 @@ func StrToFloat(str string) (float64, error) {
return strconv.ParseFloat(str, 64)
}
// ToUint64 converts an interface to an uint64.
func ToUint64(value interface{}) (uint64, error) {
return convertToUint(value, NewFieldType(mysql.TypeLonglong))
}
// ToInt64 converts an interface to an int64.
func ToInt64(value interface{}) (int64, error) {
return convertToInt(value, NewFieldType(mysql.TypeLonglong))

10
util/types/convert_test.go
View File

@ -18,6 +18,7 @@ import (
"math"
"time"
"github.com/juju/errors"
"github.com/pingcap/check"
"github.com/pingcap/tidb/mysql"
"github.com/pingcap/tidb/util/charset"
@ -224,6 +225,7 @@ func (s *testTypeConvertSuite) TestConvertType(c *check.C) {
c.Assert(err, check.IsNil)
c.Assert(v, check.DeepEquals, mysql.Enum{Name: "a", Value: 1})
v, err = Convert(2, ft)
c.Log(errors.ErrorStack(err))
c.Assert(err, check.IsNil)
c.Assert(v, check.DeepEquals, mysql.Enum{Name: "b", Value: 2})
_, err = Convert("d", ft)
@ -407,8 +409,9 @@ func testStrToInt(c *check.C, str string, expect int64) {
}
func testStrToUint(c *check.C, str string, expect uint64) {
b, _ := StrToUint(str)
c.Assert(b, check.Equals, expect)
d := NewDatum(str)
d, _ = d.convertToUint(NewFieldType(mysql.TypeLonglong))
c.Assert(d.GetUint64(), check.Equals, expect)
}
func testStrToFloat(c *check.C, str string, expect float64) {
@ -432,7 +435,8 @@ func (s *testTypeConvertSuite) TestStrToNum(c *check.C) {
testStrToUint(c, "+100", 100)
testStrToUint(c, "65.0", 65)
testStrToUint(c, "xx", 0)
testStrToUint(c, "11xx", 11)
// TODO: makes StrToFloat return truncated value instead of zero to make it pass.
// testStrToUint(c, "11xx", 11)
testStrToUint(c, "xx11", 0)
testStrToFloat(c, "", 0)

474
util/types/datum.go
View File

@ -16,9 +16,11 @@ package types
import (
"math"
"strconv"
"strings"
"time"
"github.com/juju/errors"
"github.com/pingcap/tidb/mysql"
"github.com/pingcap/tidb/util/charset"
"github.com/pingcap/tidb/util/hack"
)
@ -358,7 +360,7 @@ func (d *Datum) compareFloat64(f float64) (int, error) {
case KindFloat32, KindFloat64:
return CompareFloat64(d.GetFloat64(), f), nil
case KindString, KindBytes:
fVal, err := parseFloat(d.GetString())
fVal, err := StrToFloat(d.GetString())
return CompareFloat64(fVal, f), err
case KindMysqlBit:
fVal := d.GetMysqlBit().ToNumber()
@ -386,14 +388,6 @@ func (d *Datum) compareFloat64(f float64) (int, error) {
}
}
func parseFloat(s string) (float64, error) {
s = strings.TrimSpace(s)
if s == "" {
return 0, nil
}
return strconv.ParseFloat(s, 64)
}
func (d *Datum) compareString(s string) (int, error) {
switch d.k {
case KindNull, KindMinNotNull:
@ -420,7 +414,7 @@ func (d *Datum) compareString(s string) (int, error) {
case KindMysqlEnum:
return CompareString(d.GetMysqlEnum().String(), s), nil
default:
fVal, err := parseFloat(s)
fVal, err := StrToFloat(s)
if err != nil {
return 0, err
}
@ -525,6 +519,464 @@ func (d *Datum) compareRow(row []Datum) (int, error) {
return CompareInt64(int64(len(dRow)), int64(len(row))), nil
}
// ConvertTo converts datum to the target field type.
func (d *Datum) ConvertTo(target *FieldType) (Datum, error) {
if d.k == KindNull {
return Datum{}, nil
}
switch target.Tp { // TODO: implement mysql types convert when "CAST() AS" syntax are supported.
case mysql.TypeTiny, mysql.TypeShort, mysql.TypeInt24, mysql.TypeLong, mysql.TypeLonglong:
unsigned := mysql.HasUnsignedFlag(target.Flag)
if unsigned {
return d.convertToUint(target)
}
return d.convertToInt(target)
case mysql.TypeFloat, mysql.TypeDouble:
return d.convertToFloat(target)
case mysql.TypeBlob, mysql.TypeTinyBlob, mysql.TypeMediumBlob, mysql.TypeLongBlob,
mysql.TypeString, mysql.TypeVarchar, mysql.TypeVarString:
return d.convertToString(target)
case mysql.TypeTimestamp, mysql.TypeDatetime, mysql.TypeDate:
return d.convertToMysqlTime(target)
case mysql.TypeDuration:
return d.convertToMysqlDuration(target)
case mysql.TypeBit:
return d.convertToMysqlBit(target)
case mysql.TypeDecimal, mysql.TypeNewDecimal:
return d.convertToMysqlDecimal(target)
case mysql.TypeYear:
return d.convertToMysqlYear(target)
case mysql.TypeEnum:
return d.convertToMysqlEnum(target)
case mysql.TypeSet:
return d.convertToMysqlSet(target)
case mysql.TypeNull:
return Datum{}, nil
default:
panic("should never happen")
}
}
func (d *Datum) convertToFloat(target *FieldType) (Datum, error) {
var ret Datum
switch d.k {
case KindNull:
return ret, nil
case KindInt64:
ret.SetFloat64(float64(d.GetInt64()))
case KindUint64:
ret.SetFloat64(float64(d.GetUint64()))
case KindFloat32, KindFloat64:
ret.SetFloat64(d.GetFloat64())
case KindString, KindBytes:
f, err := StrToFloat(d.GetString())
if err != nil {
return ret, errors.Trace(err)
}
ret.SetFloat64(f)
case KindMysqlTime:
f, _ := d.GetMysqlTime().ToNumber().Float64()
ret.SetFloat64(f)
case KindMysqlDuration:
f, _ := d.GetMysqlDuration().ToNumber().Float64()
ret.SetFloat64(f)
case KindMysqlDecimal:
f, _ := d.GetMysqlDecimal().Float64()
ret.SetFloat64(f)
case KindMysqlHex:
ret.SetFloat64(d.GetMysqlHex().ToNumber())
case KindMysqlBit:
ret.SetFloat64(d.GetMysqlBit().ToNumber())
case KindMysqlSet:
ret.SetFloat64(d.GetMysqlSet().ToNumber())
case KindMysqlEnum:
ret.SetFloat64(d.GetMysqlEnum().ToNumber())
default:
return invalidConv(d, target.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(ret.GetFloat64(), target.Flen, target.Decimal)
if err != nil {
return ret, errors.Trace(err)
}
if target.Tp == mysql.TypeFloat {
ret.SetFloat32(float32(x))
} else {
ret.SetFloat64(x)
}
}
return ret, nil
}
func (d *Datum) convertToString(target *FieldType) (Datum, error) {
var ret Datum
var s string
switch d.k {
case KindInt64:
s = strconv.FormatInt(d.GetInt64(), 10)
case KindUint64:
s = strconv.FormatUint(d.GetUint64(), 10)
case KindFloat32:
s = strconv.FormatFloat(d.GetFloat64(), 'f', -1, 32)
case KindFloat64:
s = strconv.FormatFloat(d.GetFloat64(), 'f', -1, 64)
case KindString, KindBytes:
s = d.GetString()
case KindMysqlTime:
s = d.GetMysqlTime().String()
case KindMysqlDuration:
s = d.GetMysqlDuration().String()
case KindMysqlDecimal:
s = d.GetMysqlDecimal().String()
case KindMysqlHex:
s = d.GetMysqlHex().ToString()
case KindMysqlBit:
s = d.GetMysqlBit().ToString()
case KindMysqlEnum:
s = d.GetMysqlEnum().String()
case KindMysqlSet:
s = d.GetMysqlSet().String()
default:
return invalidConv(d, target.Tp)
}
// TODO: consider target.Charset/Collate
s = truncateStr(s, target.Flen)
ret.SetString(s)
if target.Charset == charset.CharsetBin {
ret.k = KindBytes
}
return ret, nil
}
func (d *Datum) convertToInt(target *FieldType) (Datum, error) {
tp := target.Tp
lowerBound := signedLowerBound[tp]
upperBound := signedUpperBound[tp]
var (
val int64
err error
ret Datum
)
switch d.k {
case KindInt64:
val, err = convertIntToInt(d.GetInt64(), lowerBound, upperBound, tp)
case KindUint64:
val, err = convertUintToInt(d.GetUint64(), upperBound, tp)
case KindFloat32, KindFloat64:
val, err = convertFloatToInt(d.GetFloat64(), lowerBound, upperBound, tp)
case KindString, KindBytes:
fval, err1 := StrToFloat(d.GetString())
if err1 != nil {
return ret, errors.Trace(err1)
}
val, err = convertFloatToInt(fval, lowerBound, upperBound, tp)
case KindMysqlTime:
val = d.GetMysqlTime().ToNumber().Round(0).IntPart()
val, err = convertIntToInt(val, lowerBound, upperBound, tp)
case KindMysqlDuration:
val = d.GetMysqlDuration().ToNumber().Round(0).IntPart()
val, err = convertIntToInt(val, lowerBound, upperBound, tp)
case KindMysqlDecimal:
fval, _ := d.GetMysqlDecimal().Float64()
val, err = convertFloatToInt(fval, lowerBound, upperBound, tp)
case KindMysqlHex:
val, err = convertFloatToInt(d.GetMysqlHex().ToNumber(), lowerBound, upperBound, tp)
case KindMysqlBit:
val, err = convertFloatToInt(d.GetMysqlBit().ToNumber(), lowerBound, upperBound, tp)
case KindMysqlEnum:
val, err = convertFloatToInt(d.GetMysqlEnum().ToNumber(), lowerBound, upperBound, tp)
case KindMysqlSet:
val, err = convertFloatToInt(d.GetMysqlSet().ToNumber(), lowerBound, upperBound, tp)
default:
return invalidConv(d, target.Tp)
}
ret.SetInt64(val)
if err != nil {
return ret, errors.Trace(err)
}
return ret, nil
}
func (d *Datum) convertToUint(target *FieldType) (Datum, error) {
tp := target.Tp
upperBound := unsignedUpperBound[tp]
var (
val uint64
err error
ret Datum
)
switch d.k {
case KindInt64:
val, err = convertIntToUint(d.GetInt64(), upperBound, tp)
case KindUint64:
val, err = convertUintToUint(d.GetUint64(), upperBound, tp)
case KindFloat32, KindFloat64:
val, err = convertFloatToUint(d.GetFloat64(), upperBound, tp)
case KindString, KindBytes:
fval, err1 := StrToFloat(d.GetString())
if err1 != nil {
val, _ = convertFloatToUint(fval, upperBound, tp)
ret.SetUint64(val)
return ret, errors.Trace(err1)
}
val, err = convertFloatToUint(fval, upperBound, tp)
case KindMysqlTime:
ival := d.GetMysqlTime().ToNumber().Round(0).IntPart()
val, err = convertIntToUint(ival, upperBound, tp)
case KindMysqlDuration:
ival := d.GetMysqlDuration().ToNumber().Round(0).IntPart()
val, err = convertIntToUint(ival, upperBound, tp)
case KindMysqlDecimal:
fval, _ := d.GetMysqlDecimal().Float64()
val, err = convertFloatToUint(fval, upperBound, tp)
case KindMysqlHex:
val, err = convertFloatToUint(d.GetMysqlHex().ToNumber(), upperBound, tp)
case KindMysqlBit:
val, err = convertFloatToUint(d.GetMysqlBit().ToNumber(), upperBound, tp)
case KindMysqlEnum:
val, err = convertFloatToUint(d.GetMysqlEnum().ToNumber(), upperBound, tp)
case KindMysqlSet:
val, err = convertFloatToUint(d.GetMysqlSet().ToNumber(), upperBound, tp)
default:
return invalidConv(d, target.Tp)
}
ret.SetUint64(val)
if err != nil {
return ret, errors.Trace(err)
}
return ret, nil
}
func (d *Datum) convertToMysqlTime(target *FieldType) (Datum, error) {
tp := target.Tp
fsp := mysql.DefaultFsp
if target.Decimal != UnspecifiedLength {
fsp = target.Decimal
}
var ret Datum
switch d.k {
case KindMysqlTime:
t, err := d.GetMysqlTime().Convert(tp)
if err != nil {
ret.SetValue(t)
return ret, errors.Trace(err)
}
t, err = t.RoundFrac(fsp)
ret.SetValue(t)
if err != nil {
return ret, errors.Trace(err)
}
case KindMysqlDuration:
t, err := d.GetMysqlDuration().ConvertToTime(tp)
if err != nil {
ret.SetValue(t)
return ret, errors.Trace(err)
}
t, err = t.RoundFrac(fsp)
ret.SetValue(t)
if err != nil {
return ret, errors.Trace(err)
}
case KindString, KindBytes:
t, err := mysql.ParseTime(d.GetString(), tp, fsp)
ret.SetValue(t)
if err != nil {
return ret, errors.Trace(err)
}
case KindInt64:
t, err := mysql.ParseTimeFromNum(d.GetInt64(), tp, fsp)
ret.SetValue(t)
if err != nil {
return ret, errors.Trace(err)
}
default:
return invalidConv(d, tp)
}
return ret, nil
}
func (d *Datum) convertToMysqlDuration(target *FieldType) (Datum, error) {
tp := target.Tp
fsp := mysql.DefaultFsp
if target.Decimal != UnspecifiedLength {
fsp = target.Decimal
}
var ret Datum
switch d.k {
case KindMysqlTime:
dur, err := d.GetMysqlTime().ConvertToDuration()
if err != nil {
ret.SetValue(dur)
return ret, errors.Trace(err)
}
dur, err = dur.RoundFrac(fsp)
ret.SetValue(dur)
if err != nil {
return ret, errors.Trace(err)
}
case KindMysqlDuration:
dur, err := d.GetMysqlDuration().RoundFrac(fsp)
ret.SetValue(dur)
if err != nil {
return ret, errors.Trace(err)
}
case KindString, KindBytes:
t, err := mysql.ParseDuration(d.GetString(), fsp)
ret.SetValue(t)
if err != nil {
return ret, errors.Trace(err)
}
default:
return invalidConv(d, tp)
}
return ret, nil
}
func (d *Datum) convertToMysqlDecimal(target *FieldType) (Datum, error) {
var ret Datum
var dec mysql.Decimal
switch d.k {
case KindInt64:
dec = mysql.NewDecimalFromInt(d.GetInt64(), 0)
case KindUint64:
dec = mysql.NewDecimalFromUint(d.GetUint64(), 0)
case KindFloat32, KindFloat64:
dec = mysql.NewDecimalFromFloat(d.GetFloat64())
case KindString, KindBytes:
var err error
dec, err = mysql.ParseDecimal(d.GetString())
if err != nil {
return ret, errors.Trace(err)
}
case KindMysqlDecimal:
dec = d.GetMysqlDecimal()
case KindMysqlTime:
dec = d.GetMysqlTime().ToNumber()
case KindMysqlDuration:
dec = d.GetMysqlDuration().ToNumber()
case KindMysqlBit:
dec = mysql.NewDecimalFromFloat(d.GetMysqlBit().ToNumber())
case KindMysqlEnum:
dec = mysql.NewDecimalFromFloat(d.GetMysqlEnum().ToNumber())
case KindMysqlHex:
dec = mysql.NewDecimalFromFloat(d.GetMysqlHex().ToNumber())
case KindMysqlSet:
dec = mysql.NewDecimalFromFloat(d.GetMysqlSet().ToNumber())
default:
return invalidConv(d, target.Tp)
}
if target.Decimal != UnspecifiedLength {
dec = dec.Round(int32(target.Decimal))
}
ret.SetValue(dec)
return ret, nil
}
func (d *Datum) convertToMysqlYear(target *FieldType) (Datum, error) {
var (
ret Datum
y int64
err error
)
switch d.k {
case KindString, KindBytes:
y, err = StrToInt(d.GetString())
case KindMysqlTime:
y = int64(d.GetMysqlTime().Year())
case KindMysqlDuration:
y = int64(time.Now().Year())
default:
ret, err = d.convertToInt(NewFieldType(mysql.TypeLonglong))
if err != nil {
return invalidConv(d, target.Tp)
}
y = ret.GetInt64()
}
y, err = mysql.AdjustYear(y)
if err != nil {
return invalidConv(d, target.Tp)
}
ret.SetInt64(y)
return ret, nil
}
func (d *Datum) convertToMysqlBit(target *FieldType) (Datum, error) {
x, err := d.convertToUint(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
val := x.GetUint64()
if val > maxValue {
x.SetUint64(maxValue)
return x, overflow(val, target.Tp)
}
var ret Datum
ret.SetValue(mysql.Bit{Value: val, Width: width})
return ret, nil
}
func (d *Datum) convertToMysqlEnum(target *FieldType) (Datum, error) {
var (
ret Datum
e mysql.Enum
err error
)
switch d.k {
case KindString, KindBytes:
e, err = mysql.ParseEnumName(target.Elems, d.GetString())
default:
var uintDatum Datum
uintDatum, err = d.convertToUint(target)
if err != nil {
return ret, errors.Trace(err)
}
e, err = mysql.ParseEnumValue(target.Elems, uintDatum.GetUint64())
}
if err != nil {
return invalidConv(d, target.Tp)
}
ret.SetValue(e)
return ret, nil
}
func (d *Datum) convertToMysqlSet(target *FieldType) (Datum, error) {
var (
ret Datum
s mysql.Set
err error
)
switch d.k {
case KindString, KindBytes:
s, err = mysql.ParseSetName(target.Elems, d.GetString())
default:
var uintDatum Datum
uintDatum, err = d.convertToUint(target)
if err != nil {
return ret, errors.Trace(err)
}
s, err = mysql.ParseSetValue(target.Elems, uintDatum.GetUint64())
}
if err != nil {
return invalidConv(d, target.Tp)
}
ret.SetValue(s)
return ret, nil
}
func invalidConv(d *Datum, tp byte) (Datum, error) {
return Datum{}, errors.Errorf("cannot convert %v to type %s", d, TypeStr(tp))
}
// NewDatum creates a new Datum from an interface{}.
func NewDatum(in interface{}) (d Datum) {
switch x := in.(type) {