diff --git a/mysql/field.go b/mysql/field.go
index da83dca2c..23c32d2e4 100644
--- a/mysql/field.go
+++ b/mysql/field.go
@@ -44,6 +44,14 @@ const (
 	FieldValueTypeString
 )
 
+func NewFieldValue(t FieldValueType, v uint64, str []byte) FieldValue {
+	return FieldValue{
+		Type:  t,
+		value: v,
+		str:   str,
+	}
+}
+
 func (f *Field) Parse(p FieldData) (err error) {
 	f.Data = p