func setSnapshotTS(s *variable.SessionVars, sVal string) error {
if sVal == "" {
s.SnapshotTS = 0
return nil
}
t, err := types.ParseTime(sVal, mysql.TypeTimestamp, types.MaxFsp)
if err != nil {
return errors.Trace(err)
}
t1, err := t.Time.GoTime()
ts := (t1.UnixNano() / int64(time.Millisecond)) << epochShiftBits
s.SnapshotTS = uint64(ts)
return errors.Trace(err)
}
func getTimeValue(ctx context.Context, v interface{}, tp byte, fsp int) (d types.Datum, err error) {
value := types.Time{
Type: tp,
Fsp: fsp,
}
defaultTime, err := getSystemTimestamp(ctx)
if err != nil {
return d, errors.Trace(err)
}
switch x := v.(type) {
case string:
upperX := strings.ToUpper(x)
if upperX == CurrentTimestamp {
value.Time = types.FromGoTime(defaultTime)
} else if upperX == ZeroTimestamp {
value, _ = types.ParseTimeFromNum(0, tp, fsp)
} else {
value, err = types.ParseTime(x, tp, fsp)
if err != nil {
return d, errors.Trace(err)
}
}
case *ast.ValueExpr:
switch x.Kind() {
case types.KindString:
value, err = types.ParseTime(x.GetString(), tp, fsp)
if err != nil {
return d, errors.Trace(err)
}
case types.KindInt64:
value, err = types.ParseTimeFromNum(x.GetInt64(), tp, fsp)
if err != nil {
return d, errors.Trace(err)
}
case types.KindNull:
return d, nil
default:
return d, errors.Trace(errDefaultValue)
}
case *ast.FuncCallExpr:
if x.FnName.L == currentTimestampL {
d.SetString(CurrentTimestamp)
return d, nil
}
return d, errors.Trace(errDefaultValue)
case *ast.UnaryOperationExpr:
// support some expression, like `-1`
v, err := Eval(ctx, x)
if err != nil {
return d, errors.Trace(err)
}
ft := types.NewFieldType(mysql.TypeLonglong)
xval, err := v.ConvertTo(ctx.GetSessionVars().StmtCtx, ft)
if err != nil {
return d, errors.Trace(err)
}
value, err = types.ParseTimeFromNum(xval.GetInt64(), tp, fsp)
if err != nil {
return d, errors.Trace(err)
}
default:
return d, nil
}
d.SetMysqlTime(value)
return d, nil
}
func parseTime(c *C, s string) types.Time {
m, err := types.ParseTime(s, mysql.TypeDatetime, types.DefaultFsp)
c.Assert(err, IsNil)
return m
}