func builtinNow(args []interface{}, ctx map[interface{}]interface{}) (interface{}, error) {
// TODO: if NOW is used in stored function or trigger, NOW will return the beginning time
// of the execution.
fsp := 0
if len(args) == 1 {
var err error
if fsp, err = checkFsp(args[0]); err != nil {
return nil, errors.Trace(err)
}
}
t := mysql.Time{
Time: time.Now(),
Type: mysql.TypeDatetime,
// set unspecified for later round
Fsp: mysql.UnspecifiedFsp,
}
return t.RoundFrac(int(fsp))
}
func builtinNow(args []interface{}, ctx map[interface{}]interface{}) (interface{}, error) {
fsp := int64(0)
if len(args) == 1 {
var err error
fsp, err = types.ToInt64(args[0])
if err != nil {
return nil, errors.Trace(err)
}
if int(fsp) > mysql.MaxFsp {
return nil, errors.Errorf("Too big precision %d specified. Maximum is 6.", fsp)
} else if fsp < 0 {
return nil, errors.Errorf("Invalid negative %d specified, must in [0, 6].", fsp)
}
}
t := mysql.Time{
Time: time.Now(),
Type: mysql.TypeDatetime,
// set unspecified for later round
Fsp: mysql.UnspecifiedFsp,
}
return t.RoundFrac(int(fsp))
}
// 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")
}
}
// 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
}