本文整理匯總了Golang中github.com/pingcap/tidb/util/types.Datum.SetFloat64方法的典型用法代碼示例。如果您正苦於以下問題：Golang Datum.SetFloat64方法的具體用法？Golang Datum.SetFloat64怎麽用？Golang Datum.SetFloat64使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類github.com/pingcap/tidb/util/types.Datum的用法示例。
在下文中一共展示了Datum.SetFloat64方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Golang代碼示例。
示例1: getZeroValue
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
}示例2: TestFromUnixTime
func (s *testEvaluatorSuite) TestFromUnixTime(c *C) {
defer testleak.AfterTest(c)()
tbl := []struct {
isDecimal bool
integralPart int64
fractionalPart int64
decimal float64
format string
ansLen int
}{
{false, 1451606400, 0, 0, "", 19},
{true, 1451606400, 123456000, 1451606400.123456, "", 26},
{true, 1451606400, 999999000, 1451606400.999999, "", 26},
{true, 1451606400, 999999900, 1451606400.9999999, "", 19},
{false, 1451606400, 0, 0, "%Y %D %M %h:%i:%s %x", 19},
{true, 1451606400, 123456000, 1451606400.123456, "%Y %D %M %h:%i:%s %x", 26},
{true, 1451606400, 999999000, 1451606400.999999, "%Y %D %M %h:%i:%s %x", 26},
{true, 1451606400, 999999900, 1451606400.9999999, "%Y %D %M %h:%i:%s %x", 19},
}
for _, t := range tbl {
var timestamp types.Datum
if !t.isDecimal {
timestamp.SetInt64(t.integralPart)
} else {
timestamp.SetFloat64(t.decimal)
}
// result of from_unixtime() is dependent on specific time zone.
unixTime := time.Unix(t.integralPart, t.fractionalPart).Round(time.Microsecond).String()[:t.ansLen]
if len(t.format) == 0 {
v, err := builtinFromUnixTime([]types.Datum{timestamp}, s.ctx)
c.Assert(err, IsNil)
ans := v.GetMysqlTime()
c.Assert(ans.String(), Equals, unixTime)
} else {
format := types.NewStringDatum(t.format)
v, err := builtinFromUnixTime([]types.Datum{timestamp, format}, s.ctx)
c.Assert(err, IsNil)
result, err := builtinDateFormat([]types.Datum{types.NewStringDatum(unixTime), format}, s.ctx)
c.Assert(err, IsNil)
c.Assert(v.GetString(), Equals, result.GetString())
}
}
v, err := builtinFromUnixTime([]types.Datum{types.NewIntDatum(-12345)}, s.ctx)
c.Assert(err, IsNil)
c.Assert(v.Kind(), Equals, types.KindNull)
_, err = builtinFromUnixTime([]types.Datum{types.NewIntDatum(math.MaxInt32 + 1)}, s.ctx)
c.Assert(err, IsNil)
c.Assert(v.Kind(), Equals, types.KindNull)
}示例3: evalFloat
func (e *Evaluator) evalFloat(val []byte, f32 bool) (types.Datum, error) {
var d types.Datum
_, f, err := codec.DecodeFloat(val)
if err != nil {
return d, ErrInvalid.Gen("invalid float % x", val)
}
if f32 {
d.SetFloat32(float32(f))
} else {
d.SetFloat64(f)
}
return d, nil
}