// Modifiable checks if the 'origin' type can be modified to 'to' type with out the need to
// change or check existing data in the table.
// It returns true if the two types has the same Charset and Collation, the same sign, both are
// integer types or string types, and new Flen and Decimal must be greater than or equal to origin.
func (d *ddl) modifiable(origin *types.FieldType, to *types.FieldType) bool {
if to.Flen > 0 && to.Flen < origin.Flen {
return false
}
if to.Decimal > 0 && to.Decimal < origin.Decimal {
return false
}
if origin.Charset != to.Charset || origin.Collate != to.Collate {
return false
}
if mysql.HasUnsignedFlag(uint(origin.Flag)) != mysql.HasUnsignedFlag(uint(to.Flag)) {
return false
}
switch origin.Tp {
case mysql.TypeVarchar, mysql.TypeString, mysql.TypeVarString,
mysql.TypeBlob, mysql.TypeTinyBlob, mysql.TypeMediumBlob, mysql.TypeLongBlob:
switch to.Tp {
case mysql.TypeVarchar, mysql.TypeString, mysql.TypeVarString,
mysql.TypeBlob, mysql.TypeTinyBlob, mysql.TypeMediumBlob, mysql.TypeLongBlob:
return true
default:
return false
}
case mysql.TypeTiny, mysql.TypeShort, mysql.TypeInt24, mysql.TypeLong, mysql.TypeLonglong:
switch to.Tp {
case mysql.TypeTiny, mysql.TypeShort, mysql.TypeInt24, mysql.TypeLong, mysql.TypeLonglong:
return true
default:
return false
}
default:
return false
}
}
func getZeroValue(col *model.ColumnInfo) types.Datum {
var d types.Datum
switch col.Tp {
case mysql.TypeTiny, mysql.TypeInt24, mysql.TypeShort, mysql.TypeLong, mysql.TypeLonglong, mysql.TypeYear:
if mysql.HasUnsignedFlag(col.Flag) {
d.SetUint64(0)
} else {
d.SetInt64(0)
}
case mysql.TypeFloat:
d.SetFloat32(0)
case mysql.TypeDouble:
d.SetFloat64(0)
case mysql.TypeNewDecimal:
d.SetMysqlDecimal(mysql.NewDecimalFromInt(0, 0))
case mysql.TypeString, mysql.TypeVarString, mysql.TypeVarchar:
d.SetString("")
case mysql.TypeBlob, mysql.TypeTinyBlob, mysql.TypeMediumBlob, mysql.TypeLongBlob:
d.SetBytes([]byte{})
case mysql.TypeDuration:
d.SetMysqlDuration(mysql.ZeroDuration)
case mysql.TypeDate, mysql.TypeNewDate:
d.SetMysqlTime(mysql.ZeroDate)
case mysql.TypeTimestamp:
d.SetMysqlTime(mysql.ZeroTimestamp)
case mysql.TypeDatetime:
d.SetMysqlTime(mysql.ZeroDatetime)
case mysql.TypeBit:
d.SetMysqlBit(mysql.Bit{Value: 0, Width: mysql.MinBitWidth})
case mysql.TypeSet:
d.SetMysqlSet(mysql.Set{})
}
return d
}
// handleRowData deals with raw row data:
// 1. Decodes row from raw byte slice.
// 2. Checks if it fit where condition.
// 3. Update aggregate functions.
// returns true if got a row.
func (rs *localRegion) handleRowData(ctx *selectContext, handle int64, value []byte) (bool, error) {
columns := ctx.sel.TableInfo.Columns
values, err := rs.getRowData(value, ctx.colTps)
if err != nil {
return false, errors.Trace(err)
}
// Fill handle and null columns.
for _, col := range columns {
if col.GetPkHandle() {
var handleDatum types.Datum
if mysql.HasUnsignedFlag(uint(col.Flag)) {
// PK column is Unsigned
handleDatum = types.NewUintDatum(uint64(handle))
} else {
handleDatum = types.NewIntDatum(handle)
}
handleData, err1 := codec.EncodeValue(nil, handleDatum)
if err1 != nil {
return false, errors.Trace(err1)
}
values[col.GetColumnId()] = handleData
} else {
_, ok := values[col.GetColumnId()]
if !ok {
if mysql.HasNotNullFlag(uint(col.GetFlag())) {
return false, errors.New("Miss column")
}
values[col.GetColumnId()] = []byte{codec.NilFlag}
}
}
}
return rs.valuesToRow(ctx, handle, values)
}
// GetTypeDesc gets the description for column type.
func (c *Column) GetTypeDesc() string {
desc := c.FieldType.CompactStr()
if mysql.HasUnsignedFlag(c.Flag) {
desc += " UNSIGNED"
}
return desc
}
// RowWithCols implements table.Table RowWithCols interface.
func (t *Table) RowWithCols(ctx context.Context, h int64, cols []*table.Column) ([]types.Datum, error) {
txn, err := ctx.GetTxn(false)
if err != nil {
return nil, errors.Trace(err)
}
// Get raw row data from kv.
key := t.RecordKey(h)
value, err := txn.Get(key)
if err != nil {
return nil, errors.Trace(err)
}
// Decode raw row data.
v := make([]types.Datum, len(cols))
colTps := make(map[int64]*types.FieldType, len(cols))
for i, col := range cols {
if col == nil {
continue
}
if col.State != model.StatePublic {
return nil, table.ErrColumnStateNonPublic.Gen("Cannot use none public column - %v", cols)
}
if col.IsPKHandleColumn(t.meta) {
if mysql.HasUnsignedFlag(col.Flag) {
v[i].SetUint64(uint64(h))
} else {
v[i].SetInt64(h)
}
continue
}
colTps[col.ID] = &col.FieldType
}
row, err := tablecodec.DecodeRow(value, colTps)
if err != nil {
return nil, errors.Trace(err)
}
for i, col := range cols {
if col == nil {
continue
}
if col.State != model.StatePublic {
// TODO: check this
return nil, table.ErrColumnStateNonPublic.Gen("Cannot use none public column - %v", cols)
}
if col.IsPKHandleColumn(t.meta) {
continue
}
ri, ok := row[col.ID]
if !ok && mysql.HasNotNullFlag(col.Flag) {
return nil, errors.New("Miss column")
}
v[i] = ri
}
return v, nil
}
func (h *rpcHandler) getRowByHandle(ctx *selectContext, handle int64) (*tipb.Row, error) {
tid := ctx.sel.TableInfo.GetTableId()
columns := ctx.sel.TableInfo.Columns
row := new(tipb.Row)
var d types.Datum
d.SetInt64(handle)
var err error
row.Handle, err = codec.EncodeValue(nil, d)
if err != nil {
return nil, errors.Trace(err)
}
for _, col := range columns {
if col.GetPkHandle() {
if mysql.HasUnsignedFlag(uint(col.GetFlag())) {
row.Data, err = codec.EncodeValue(row.Data, types.NewUintDatum(uint64(handle)))
if err != nil {
return nil, errors.Trace(err)
}
} else {
row.Data = append(row.Data, row.Handle...)
}
} else {
colID := col.GetColumnId()
if ctx.whereColumns[colID] != nil {
// The column is saved in evaluator, use it directly.
datum := ctx.eval.Row[colID]
row.Data, err = codec.EncodeValue(row.Data, datum)
if err != nil {
return nil, errors.Trace(err)
}
} else {
key := tablecodec.EncodeColumnKey(tid, handle, colID)
data, err1 := h.mvccStore.Get(key, ctx.sel.GetStartTs())
if err1 != nil {
return nil, errors.Trace(err1)
}
if data == nil {
if mysql.HasNotNullFlag(uint(col.GetFlag())) {
return nil, errors.Trace(kv.ErrNotExist)
}
row.Data = append(row.Data, codec.NilFlag)
} else {
row.Data = append(row.Data, data...)
}
}
}
}
return row, nil
}
func rowWithCols(txn kv.Retriever, t table.Table, h int64, cols []*table.Column) ([]types.Datum, error) {
key := t.RecordKey(h)
value, err := txn.Get(key)
if err != nil {
return nil, errors.Trace(err)
}
v := make([]types.Datum, len(cols))
colTps := make(map[int64]*types.FieldType, len(cols))
for i, col := range cols {
if col == nil {
continue
}
if col.State != model.StatePublic {
return nil, errInvalidColumnState.Gen("Cannot use none public column - %v", cols)
}
if col.IsPKHandleColumn(t.Meta()) {
if mysql.HasUnsignedFlag(col.Flag) {
v[i].SetUint64(uint64(h))
} else {
v[i].SetInt64(h)
}
continue
}
colTps[col.ID] = &col.FieldType
}
row, err := tablecodec.DecodeRow(value, colTps)
if err != nil {
return nil, errors.Trace(err)
}
for i, col := range cols {
if col == nil {
continue
}
if col.State != model.StatePublic {
// TODO: check this
return nil, errInvalidColumnState.Gen("Cannot use none public column - %v", cols)
}
if col.IsPKHandleColumn(t.Meta()) {
continue
}
ri, ok := row[col.ID]
if !ok && mysql.HasNotNullFlag(col.Flag) {
return nil, errors.New("Miss")
}
v[i] = ri
}
return v, nil
}
func (h *rpcHandler) evalWhereForRow(ctx *selectContext, handle int64) (bool, error) {
if ctx.sel.Where == nil {
return true, nil
}
tid := ctx.sel.TableInfo.GetTableId()
for colID, col := range ctx.whereColumns {
if col.GetPkHandle() {
if mysql.HasUnsignedFlag(uint(col.GetFlag())) {
ctx.eval.Row[colID] = types.NewUintDatum(uint64(handle))
} else {
ctx.eval.Row[colID] = types.NewIntDatum(handle)
}
} else {
key := tablecodec.EncodeColumnKey(tid, handle, colID)
data, err := h.mvccStore.Get(key, ctx.sel.GetStartTs())
if err != nil {
return false, errors.Trace(err)
}
if data == nil {
if mysql.HasNotNullFlag(uint(col.GetFlag())) {
return false, errors.Trace(kv.ErrNotExist)
}
ctx.eval.Row[colID] = types.Datum{}
} else {
var d types.Datum
d, err = tablecodec.DecodeColumnValue(data, col)
if err != nil {
return false, errors.Trace(err)
}
ctx.eval.Row[colID] = d
}
}
}
result, err := ctx.eval.Eval(ctx.sel.Where)
if err != nil {
return false, errors.Trace(err)
}
if result.IsNull() {
return false, nil
}
boolResult, err := result.ToBool()
if err != nil {
return false, errors.Trace(err)
}
return boolResult == 1, nil
}
// String implements the Expression String interface.
func (f *FunctionCast) String() string {
tpStr := ""
if f.Tp.Tp == mysql.TypeLonglong {
if mysql.HasUnsignedFlag(f.Tp.Flag) {
tpStr = "UNSIGNED"
} else {
tpStr = "SIGNED"
}
} else {
tpStr = f.Tp.String()
}
if f.FunctionType == ConvertFunction {
return fmt.Sprintf("CONVERT(%s, %s)", f.Expr.String(), tpStr)
} else if f.FunctionType == BinaryOperator {
return fmt.Sprintf("BINARY %s", f.Expr.String())
}
return fmt.Sprintf("CAST(%s AS %s)", f.Expr.String(), tpStr)
}
func (e *XSelectIndexExec) indexRowToTableRow(handle int64, indexRow []types.Datum) []types.Datum {
tableRow := make([]types.Datum, len(e.indexPlan.Columns))
for i, tblCol := range e.indexPlan.Columns {
if table.ToColumn(tblCol).IsPKHandleColumn(e.indexPlan.Table) {
if mysql.HasUnsignedFlag(tblCol.FieldType.Flag) {
tableRow[i] = types.NewUintDatum(uint64(handle))
} else {
tableRow[i] = types.NewIntDatum(handle)
}
continue
}
for j, idxCol := range e.indexPlan.Index.Columns {
if tblCol.Name.L == idxCol.Name.L {
tableRow[i] = indexRow[j]
break
}
}
}
return tableRow
}
// Put column values into ctx, the values will be used for expr evaluation.
func (rs *localRegion) setColumnValueToCtx(ctx *selectContext, h int64, row map[int64][]byte, cols map[int64]*tipb.ColumnInfo) error {
for colID, col := range cols {
if col.GetPkHandle() {
if mysql.HasUnsignedFlag(uint(col.GetFlag())) {
ctx.eval.Row[colID] = types.NewUintDatum(uint64(h))
} else {
ctx.eval.Row[colID] = types.NewIntDatum(h)
}
} else {
data := row[colID]
ft := distsql.FieldTypeFromPBColumn(col)
datum, err := tablecodec.DecodeColumnValue(data, ft)
if err != nil {
return errors.Trace(err)
}
ctx.eval.Row[colID] = datum
}
}
return nil
}
// String joins the information of FieldType and
// returns a string.
func (ft *FieldType) String() string {
strs := []string{ft.CompactStr()}
if mysql.HasUnsignedFlag(ft.Flag) {
strs = append(strs, "UNSIGNED")
}
if mysql.HasZerofillFlag(ft.Flag) {
strs = append(strs, "ZEROFILL")
}
if mysql.HasBinaryFlag(ft.Flag) {
strs = append(strs, "BINARY")
}
if IsTypeChar(ft.Tp) || IsTypeBlob(ft.Tp) {
if ft.Charset != "" && ft.Charset != charset.CharsetBin {
strs = append(strs, fmt.Sprintf("CHARACTER SET %s", ft.Charset))
}
if ft.Collate != "" && ft.Collate != charset.CharsetBin {
strs = append(strs, fmt.Sprintf("COLLATE %s", ft.Collate))
}
}
return strings.Join(strs, " ")
}
// RowWithCols implements table.Table RowWithCols interface.
func (t *Table) RowWithCols(ctx context.Context, h int64, cols []*table.Column) ([]types.Datum, error) {
txn, err := ctx.GetTxn(false)
if err != nil {
return nil, errors.Trace(err)
}
v := make([]types.Datum, len(cols))
for i, col := range cols {
if col == nil {
continue
}
if col.State != model.StatePublic {
return nil, table.ErrColumnStateNonPublic.Gen("Cannot use none public column - %v", cols)
}
if col.IsPKHandleColumn(t.meta) {
if mysql.HasUnsignedFlag(col.Flag) {
v[i].SetUint64(uint64(h))
} else {
v[i].SetInt64(h)
}
continue
}
k := t.RecordKey(h, col)
data, err := txn.Get(k)
if terror.ErrorEqual(err, kv.ErrNotExist) && !mysql.HasNotNullFlag(col.Flag) {
continue
} else if err != nil {
return nil, errors.Trace(err)
}
v[i], err = DecodeValue(data, &col.FieldType)
if err != nil {
return nil, errors.Trace(err)
}
}
return v, nil
}
// ConvertTo converts a 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")
}
}
// 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")
}
}
// handleRowData deals with raw row data:
// 1. Decodes row from raw byte slice.
// 2. Checks if it fit where condition.
// 3. Update aggregate functions.
func (rs *localRegion) handleRowData(ctx *selectContext, handle int64, value []byte) (*tipb.Row, error) {
columns := ctx.sel.TableInfo.Columns
row := new(tipb.Row)
var d types.Datum
d.SetInt64(handle)
var err error
row.Handle, err = codec.EncodeValue(nil, d)
if err != nil {
return nil, errors.Trace(err)
}
rowData := make([][]byte, len(columns))
values, err := rs.getRowData(value, ctx.colTps)
if err != nil {
return nil, errors.Trace(err)
}
for i, col := range columns {
if *col.PkHandle {
var colVal []byte
if mysql.HasUnsignedFlag(uint(*col.Flag)) {
// PK column is Unsigned
var ud types.Datum
ud.SetUint64(uint64(handle))
var err1 error
colVal, err1 = codec.EncodeValue(nil, ud)
if err1 != nil {
return nil, errors.Trace(err1)
}
} else {
colVal = row.Handle
}
rowData[i] = colVal
continue
}
v, ok := values[col.GetColumnId()]
if !ok {
if mysql.HasNotNullFlag(uint(col.GetFlag())) {
return nil, errors.New("Miss column")
}
v = []byte{codec.NilFlag}
values[col.GetColumnId()] = v
}
rowData[i] = v
}
// Evalue where
match, err := rs.evalWhereForRow(ctx, handle, values)
if err != nil {
return nil, errors.Trace(err)
}
if !match {
return nil, nil
}
if ctx.aggregate {
// Update aggregate functions.
err = rs.aggregate(ctx, handle, values)
if err != nil {
return nil, errors.Trace(err)
}
} else {
// If without aggregate functions, just return raw row data.
for _, d := range rowData {
row.Data = append(row.Data, d...)
}
}
return row, nil
}
func (h *rpcHandler) getRowByHandle(ctx *selectContext, handle int64) (*tipb.Row, error) {
tid := ctx.sel.TableInfo.GetTableId()
columns := ctx.sel.TableInfo.Columns
row := new(tipb.Row)
var d types.Datum
d.SetInt64(handle)
var err error
row.Handle, err = codec.EncodeValue(nil, d)
if err != nil {
return nil, errors.Trace(err)
}
rowData := make([][]byte, len(columns))
colTps := make(map[int64]*types.FieldType, len(columns))
for i, col := range columns {
var colVal []byte
if col.GetPkHandle() {
if mysql.HasUnsignedFlag(uint(*col.Flag)) {
// PK column is Unsigned
var ud types.Datum
ud.SetUint64(uint64(handle))
var err1 error
colVal, err1 = codec.EncodeValue(nil, ud)
if err1 != nil {
return nil, errors.Trace(err1)
}
} else {
colVal = row.Handle
}
rowData[i] = colVal
} else {
colTps[col.GetColumnId()] = xapi.FieldTypeFromPBColumn(col)
}
}
key := tablecodec.EncodeRowKeyWithHandle(tid, handle)
value, err := h.mvccStore.Get(key, ctx.sel.GetStartTs())
if err != nil {
return nil, errors.Trace(err)
}
values, err := h.getRowData(value, colTps)
if err != nil {
return nil, errors.Trace(err)
}
for i, col := range columns {
if col.GetPkHandle() {
continue
}
v, ok := values[col.GetColumnId()]
if !ok {
if mysql.HasNotNullFlag(uint(col.GetFlag())) {
return nil, errors.New("Miss column")
}
v = []byte{codec.NilFlag}
values[col.GetColumnId()] = v
}
rowData[i] = v
}
// Evalue where
match, err := h.evalWhereForRow(ctx, handle, values)
if err != nil {
return nil, errors.Trace(err)
}
if !match {
return nil, nil
}
for _, d := range rowData {
row.Data = append(row.Data, d...)
}
return row, nil
}
// 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
}
vdi, ok := val.(*DataItem)
if ok {
return Convert(vdi.Data, target)
}
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
case mysql.TypeNull:
return nil, nil
default:
panic("should never happen")
}
}
func (rs *localRegion) getRowByHandle(ctx *selectContext, handle int64) (*tipb.Row, error) {
tid := ctx.sel.TableInfo.GetTableId()
columns := ctx.sel.TableInfo.Columns
row := new(tipb.Row)
var d types.Datum
d.SetInt64(handle)
var err error
row.Handle, err = codec.EncodeValue(nil, d)
if err != nil {
return nil, errors.Trace(err)
}
rowData := make([][]byte, 0, len(columns))
for _, col := range columns {
var colVal []byte
if *col.PkHandle {
if mysql.HasUnsignedFlag(uint(*col.Flag)) {
// PK column is Unsigned
var ud types.Datum
ud.SetUint64(uint64(handle))
var err1 error
colVal, err1 = codec.EncodeValue(nil, ud)
if err1 != nil {
return nil, errors.Trace(err1)
}
} else {
colVal = row.Handle
}
} else {
colID := col.GetColumnId()
if ctx.whereColumns[colID] != nil {
// The column is saved in evaluator, use it directly.
datum := ctx.eval.Row[colID]
var err1 error
colVal, err1 = codec.EncodeValue(nil, datum)
if err1 != nil {
return nil, errors.Trace(err1)
}
} else {
key := tablecodec.EncodeColumnKey(tid, handle, colID)
var err1 error
colVal, err1 = ctx.txn.Get(key)
if err1 != nil {
if !isDefaultNull(err1, col) {
return nil, errors.Trace(err1)
}
colVal = []byte{codec.NilFlag}
}
}
}
rowData = append(rowData, colVal)
}
if ctx.aggregate {
// Update aggregate functions.
err = rs.aggregate(ctx, rowData)
if err != nil {
return nil, errors.Trace(err)
}
} else {
// If without aggregate functions, just return raw row data.
for _, d := range rowData {
row.Data = append(row.Data, d...)
}
}
return row, nil
}