diff --git a/go-api/milvuspb/milvus.pb.go b/go-api/milvuspb/milvus.pb.go
index eefa9e6..88689ab 100644
--- a/go-api/milvuspb/milvus.pb.go
+++ b/go-api/milvuspb/milvus.pb.go
@@ -320,7 +320,7 @@ func (m *AlterAliasRequest) GetAlias() string {
 	return ""
 }
 
-//*
+// *
 // Create collection in milvus
 type CreateCollectionRequest struct {
 	// Not useful for now
@@ -415,7 +415,7 @@ func (m *CreateCollectionRequest) GetProperties() []*commonpb.KeyValuePair {
 	return nil
 }
 
-//*
+// *
 // Drop collection in milvus, also will drop data in collection.
 type DropCollectionRequest struct {
 	// Not useful for now
@@ -474,7 +474,7 @@ func (m *DropCollectionRequest) GetCollectionName() string {
 	return ""
 }
 
-//*
+// *
 // Alter collection in milvus
 type AlterCollectionRequest struct {
 	// Not useful for now
@@ -549,7 +549,7 @@ func (m *AlterCollectionRequest) GetProperties() []*commonpb.KeyValuePair {
 	return nil
 }
 
-//*
+// *
 // Check collection exist in milvus or not.
 type HasCollectionRequest struct {
 	// Not useful for now
@@ -711,7 +711,7 @@ func (m *StringResponse) GetValue() string {
 	return ""
 }
 
-//*
+// *
 // Get collection meta datas like: schema, collectionID, shards number ...
 type DescribeCollectionRequest struct {
 	// Not useful for now
@@ -788,7 +788,7 @@ func (m *DescribeCollectionRequest) GetTimeStamp() uint64 {
 	return 0
 }
 
-//*
+// *
 // DescribeCollection Response
 type DescribeCollectionResponse struct {
 	// Contain error_code and reason
@@ -945,7 +945,7 @@ func (m *DescribeCollectionResponse) GetDbName() string {
 	return ""
 }
 
-//*
+// *
 // Load collection data into query nodes, then you can do vector search on this collection.
 type LoadCollectionRequest struct {
 	// Not useful for now
@@ -1031,7 +1031,7 @@ func (m *LoadCollectionRequest) GetRefresh() bool {
 	return false
 }
 
-//*
+// *
 // Release collection data from query nodes, then you can't do vector search on this collection.
 type ReleaseCollectionRequest struct {
 	// Not useful for now
@@ -1090,7 +1090,7 @@ func (m *ReleaseCollectionRequest) GetCollectionName() string {
 	return ""
 }
 
-//*
+// *
 // Get statistics like row_count.
 // WARNING: This API is experimental and not useful for now.
 type GetStatisticsRequest struct {
@@ -1168,7 +1168,7 @@ func (m *GetStatisticsRequest) GetGuaranteeTimestamp() uint64 {
 	return 0
 }
 
-//*
+// *
 // Will return statistics in stats field like [{key:"row_count",value:"1"}]
 // WARNING: This API is experimental and not useful for now.
 type GetStatisticsResponse struct {
@@ -1220,7 +1220,7 @@ func (m *GetStatisticsResponse) GetStats() []*commonpb.KeyValuePair {
 	return nil
 }
 
-//*
+// *
 // Get collection statistics like row_count.
 type GetCollectionStatisticsRequest struct {
 	// Not useful for now
@@ -1279,7 +1279,7 @@ func (m *GetCollectionStatisticsRequest) GetCollectionName() string {
 	return ""
 }
 
-//*
+// *
 // Will return collection statistics in stats field like [{key:"row_count",value:"1"}]
 type GetCollectionStatisticsResponse struct {
 	// Contain error_code and reason
@@ -1330,7 +1330,6 @@ func (m *GetCollectionStatisticsResponse) GetStats() []*commonpb.KeyValuePair {
 	return nil
 }
 
-//
 // List collections
 type ShowCollectionsRequest struct {
 	// Not useful for now
@@ -1408,7 +1407,6 @@ func (m *ShowCollectionsRequest) GetCollectionNames() []string {
 	return nil
 }
 
-//
 // Return basic collection infos.
 type ShowCollectionsResponse struct {
 	// Contain error_code and reason
@@ -1505,7 +1503,6 @@ func (m *ShowCollectionsResponse) GetQueryServiceAvailable() []bool {
 	return nil
 }
 
-//
 // Create partition in created collection.
 type CreatePartitionRequest struct {
 	// Not useful for now
@@ -1573,7 +1570,6 @@ func (m *CreatePartitionRequest) GetPartitionName() string {
 	return ""
 }
 
-//
 // Drop partition in created collection.
 type DropPartitionRequest struct {
 	// Not useful for now
@@ -1641,7 +1637,6 @@ func (m *DropPartitionRequest) GetPartitionName() string {
 	return ""
 }
 
-//
 // Check if partition exist in collection or not.
 type HasPartitionRequest struct {
 	// Not useful for now
@@ -1709,7 +1704,6 @@ func (m *HasPartitionRequest) GetPartitionName() string {
 	return ""
 }
 
-//
 // Load specific partitions data of one collection into query nodes
 // Then you can get these data as result when you do vector search on this collection.
 type LoadPartitionsRequest struct {
@@ -1805,7 +1799,6 @@ func (m *LoadPartitionsRequest) GetRefresh() bool {
 	return false
 }
 
-//
 // Release specific partitions data of one collection from query nodes.
 // Then you can not get these data as result when you do vector search on this collection.
 type ReleasePartitionsRequest struct {
@@ -1874,7 +1867,6 @@ func (m *ReleasePartitionsRequest) GetPartitionNames() []string {
 	return nil
 }
 
-//
 // Get partition statistics like row_count.
 type GetPartitionStatisticsRequest struct {
 	// Not useful for now
@@ -1989,7 +1981,6 @@ func (m *GetPartitionStatisticsResponse) GetStats() []*commonpb.KeyValuePair {
 	return nil
 }
 
-//
 // List all partitions for particular collection
 type ShowPartitionsRequest struct {
 	// Not useful for now
@@ -2076,7 +2067,6 @@ func (m *ShowPartitionsRequest) GetType() ShowType {
 	return ShowType_All
 }
 
-//
 // List all partitions for particular collection response.
 // The returned datas are all rows, we can format to columns by therir index.
 type ShowPartitionsResponse struct {
@@ -2393,7 +2383,6 @@ func (m *ShowSegmentsResponse) GetSegmentIDs() []int64 {
 	return nil
 }
 
-//
 // Create index for vector datas
 type CreateIndexRequest struct {
 	// Not useful for now
@@ -2479,7 +2468,6 @@ func (m *CreateIndexRequest) GetIndexName() string {
 	return ""
 }
 
-//
 // Get created index information.
 // Current release of Milvus only supports showing latest built index.
 type DescribeIndexRequest struct {
@@ -2557,7 +2545,6 @@ func (m *DescribeIndexRequest) GetIndexName() string {
 	return ""
 }
 
-//
 // Index informations
 type IndexDescription struct {
 	// Index name
@@ -2660,7 +2647,6 @@ func (m *IndexDescription) GetIndexStateFailReason() string {
 	return ""
 }
 
-//
 // Describe index response
 type DescribeIndexResponse struct {
 	// Response status
@@ -2711,8 +2697,7 @@ func (m *DescribeIndexResponse) GetIndexDescriptions() []*IndexDescription {
 	return nil
 }
 
-//
-//  Get index building progress
+// Get index building progress
 type GetIndexBuildProgressRequest struct {
 	// Not useful for now
 	Base   *commonpb.MsgBase `protobuf:"bytes,1,opt,name=base,proto3" json:"base,omitempty"`
@@ -3896,6 +3881,7 @@ func (m *VectorIDs) GetPartitionNames() []string {
 
 type VectorsArray struct {
 	// Types that are valid to be assigned to Array:
+	//
 	//	*VectorsArray_IdArray
 	//	*VectorsArray_DataArray
 	Array                isVectorsArray_Array `protobuf_oneof:"array"`
@@ -4042,6 +4028,7 @@ type CalcDistanceResults struct {
 	// num(op_left)*num(op_right) distance values, "HAMMIN" return integer distance
 	//
 	// Types that are valid to be assigned to Array:
+	//
 	//	*CalcDistanceResults_IntDist
 	//	*CalcDistanceResults_FloatDist
 	Array                isCalcDistanceResults_Array `protobuf_oneof:"array"`
@@ -4999,7 +4986,6 @@ func (m *GetComponentStatesRequest) XXX_DiscardUnknown() {
 
 var xxx_messageInfo_GetComponentStatesRequest proto.InternalMessageInfo
 
-//
 // Do load balancing operation from src_nodeID to dst_nodeID.
 type LoadBalanceRequest struct {
 	Base                 *commonpb.MsgBase `protobuf:"bytes,1,opt,name=base,proto3" json:"base,omitempty"`
diff --git a/go-api/schemapb/schema.pb.go b/go-api/schemapb/schema.pb.go
index 2067b51..852add0 100644
--- a/go-api/schemapb/schema.pb.go
+++ b/go-api/schemapb/schema.pb.go
@@ -21,7 +21,7 @@ var _ = math.Inf
 // proto package needs to be updated.
 const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
 
-//*
+// *
 // @brief Field data type
 type DataType int32
 
@@ -115,7 +115,7 @@ func (FieldState) EnumDescriptor() ([]byte, []int) {
 	return fileDescriptor_1c5fb4d8cc22d66a, []int{1}
 }
 
-//*
+// *
 // @brief Field schema
 type FieldSchema struct {
 	FieldID      int64                    `protobuf:"varint,1,opt,name=fieldID,proto3" json:"fieldID,omitempty"`
@@ -128,10 +128,11 @@ type FieldSchema struct {
 	AutoID       bool                     `protobuf:"varint,8,opt,name=autoID,proto3" json:"autoID,omitempty"`
 	State        FieldState               `protobuf:"varint,9,opt,name=state,proto3,enum=milvus.proto.schema.FieldState" json:"state,omitempty"`
 	// state is `Created`.
-	ElementType          DataType `protobuf:"varint,10,opt,name=element_type,json=elementType,proto3,enum=milvus.proto.schema.DataType" json:"element_type,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
+	ElementType          DataType    `protobuf:"varint,10,opt,name=element_type,json=elementType,proto3,enum=milvus.proto.schema.DataType" json:"element_type,omitempty"`
+	DefaultValue         *ValueField `protobuf:"bytes,11,opt,name=default_value,json=defaultValue,proto3" json:"default_value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{}    `json:"-"`
+	XXX_unrecognized     []byte      `json:"-"`
+	XXX_sizecache        int32       `json:"-"`
 }
 
 func (m *FieldSchema) Reset()         { *m = FieldSchema{} }
@@ -229,7 +230,14 @@ func (m *FieldSchema) GetElementType() DataType {
 	return DataType_None
 }
 
-//*
+func (m *FieldSchema) GetDefaultValue() *ValueField {
+	if m != nil {
+		return m.DefaultValue
+	}
+	return nil
+}
+
+// *
 // @brief Collection schema
 type CollectionSchema struct {
 	Name                 string         `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
@@ -654,8 +662,165 @@ func (m *JSONArray) GetData() [][]byte {
 	return nil
 }
 
+type ValueField struct {
+	// Types that are valid to be assigned to Data:
+	//
+	//	*ValueField_BoolData
+	//	*ValueField_IntData
+	//	*ValueField_LongData
+	//	*ValueField_FloatData
+	//	*ValueField_DoubleData
+	//	*ValueField_StringData
+	//	*ValueField_BytesData
+	Data                 isValueField_Data `protobuf_oneof:"data"`
+	XXX_NoUnkeyedLiteral struct{}          `json:"-"`
+	XXX_unrecognized     []byte            `json:"-"`
+	XXX_sizecache        int32             `json:"-"`
+}
+
+func (m *ValueField) Reset()         { *m = ValueField{} }
+func (m *ValueField) String() string { return proto.CompactTextString(m) }
+func (*ValueField) ProtoMessage()    {}
+func (*ValueField) Descriptor() ([]byte, []int) {
+	return fileDescriptor_1c5fb4d8cc22d66a, []int{11}
+}
+
+func (m *ValueField) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_ValueField.Unmarshal(m, b)
+}
+func (m *ValueField) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_ValueField.Marshal(b, m, deterministic)
+}
+func (m *ValueField) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_ValueField.Merge(m, src)
+}
+func (m *ValueField) XXX_Size() int {
+	return xxx_messageInfo_ValueField.Size(m)
+}
+func (m *ValueField) XXX_DiscardUnknown() {
+	xxx_messageInfo_ValueField.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_ValueField proto.InternalMessageInfo
+
+type isValueField_Data interface {
+	isValueField_Data()
+}
+
+type ValueField_BoolData struct {
+	BoolData bool `protobuf:"varint,1,opt,name=bool_data,json=boolData,proto3,oneof"`
+}
+
+type ValueField_IntData struct {
+	IntData int32 `protobuf:"varint,2,opt,name=int_data,json=intData,proto3,oneof"`
+}
+
+type ValueField_LongData struct {
+	LongData int64 `protobuf:"varint,3,opt,name=long_data,json=longData,proto3,oneof"`
+}
+
+type ValueField_FloatData struct {
+	FloatData float32 `protobuf:"fixed32,4,opt,name=float_data,json=floatData,proto3,oneof"`
+}
+
+type ValueField_DoubleData struct {
+	DoubleData float64 `protobuf:"fixed64,5,opt,name=double_data,json=doubleData,proto3,oneof"`
+}
+
+type ValueField_StringData struct {
+	StringData string `protobuf:"bytes,6,opt,name=string_data,json=stringData,proto3,oneof"`
+}
+
+type ValueField_BytesData struct {
+	BytesData []byte `protobuf:"bytes,7,opt,name=bytes_data,json=bytesData,proto3,oneof"`
+}
+
+func (*ValueField_BoolData) isValueField_Data() {}
+
+func (*ValueField_IntData) isValueField_Data() {}
+
+func (*ValueField_LongData) isValueField_Data() {}
+
+func (*ValueField_FloatData) isValueField_Data() {}
+
+func (*ValueField_DoubleData) isValueField_Data() {}
+
+func (*ValueField_StringData) isValueField_Data() {}
+
+func (*ValueField_BytesData) isValueField_Data() {}
+
+func (m *ValueField) GetData() isValueField_Data {
+	if m != nil {
+		return m.Data
+	}
+	return nil
+}
+
+func (m *ValueField) GetBoolData() bool {
+	if x, ok := m.GetData().(*ValueField_BoolData); ok {
+		return x.BoolData
+	}
+	return false
+}
+
+func (m *ValueField) GetIntData() int32 {
+	if x, ok := m.GetData().(*ValueField_IntData); ok {
+		return x.IntData
+	}
+	return 0
+}
+
+func (m *ValueField) GetLongData() int64 {
+	if x, ok := m.GetData().(*ValueField_LongData); ok {
+		return x.LongData
+	}
+	return 0
+}
+
+func (m *ValueField) GetFloatData() float32 {
+	if x, ok := m.GetData().(*ValueField_FloatData); ok {
+		return x.FloatData
+	}
+	return 0
+}
+
+func (m *ValueField) GetDoubleData() float64 {
+	if x, ok := m.GetData().(*ValueField_DoubleData); ok {
+		return x.DoubleData
+	}
+	return 0
+}
+
+func (m *ValueField) GetStringData() string {
+	if x, ok := m.GetData().(*ValueField_StringData); ok {
+		return x.StringData
+	}
+	return ""
+}
+
+func (m *ValueField) GetBytesData() []byte {
+	if x, ok := m.GetData().(*ValueField_BytesData); ok {
+		return x.BytesData
+	}
+	return nil
+}
+
+// XXX_OneofWrappers is for the internal use of the proto package.
+func (*ValueField) XXX_OneofWrappers() []interface{} {
+	return []interface{}{
+		(*ValueField_BoolData)(nil),
+		(*ValueField_IntData)(nil),
+		(*ValueField_LongData)(nil),
+		(*ValueField_FloatData)(nil),
+		(*ValueField_DoubleData)(nil),
+		(*ValueField_StringData)(nil),
+		(*ValueField_BytesData)(nil),
+	}
+}
+
 type ScalarField struct {
 	// Types that are valid to be assigned to Data:
+	//
 	//	*ScalarField_BoolData
 	//	*ScalarField_IntData
 	//	*ScalarField_LongData
@@ -675,7 +840,7 @@ func (m *ScalarField) Reset()         { *m = ScalarField{} }
 func (m *ScalarField) String() string { return proto.CompactTextString(m) }
 func (*ScalarField) ProtoMessage()    {}
 func (*ScalarField) Descriptor() ([]byte, []int) {
-	return fileDescriptor_1c5fb4d8cc22d66a, []int{11}
+	return fileDescriptor_1c5fb4d8cc22d66a, []int{12}
 }
 
 func (m *ScalarField) XXX_Unmarshal(b []byte) error {
@@ -842,6 +1007,7 @@ func (*ScalarField) XXX_OneofWrappers() []interface{} {
 type VectorField struct {
 	Dim int64 `protobuf:"varint,1,opt,name=dim,proto3" json:"dim,omitempty"`
 	// Types that are valid to be assigned to Data:
+	//
 	//	*VectorField_FloatVector
 	//	*VectorField_BinaryVector
 	Data                 isVectorField_Data `protobuf_oneof:"data"`
@@ -854,7 +1020,7 @@ func (m *VectorField) Reset()         { *m = VectorField{} }
 func (m *VectorField) String() string { return proto.CompactTextString(m) }
 func (*VectorField) ProtoMessage()    {}
 func (*VectorField) Descriptor() ([]byte, []int) {
-	return fileDescriptor_1c5fb4d8cc22d66a, []int{12}
+	return fileDescriptor_1c5fb4d8cc22d66a, []int{13}
 }
 
 func (m *VectorField) XXX_Unmarshal(b []byte) error {
@@ -931,6 +1097,7 @@ type FieldData struct {
 	Type      DataType `protobuf:"varint,1,opt,name=type,proto3,enum=milvus.proto.schema.DataType" json:"type,omitempty"`
 	FieldName string   `protobuf:"bytes,2,opt,name=field_name,json=fieldName,proto3" json:"field_name,omitempty"`
 	// Types that are valid to be assigned to Field:
+	//
 	//	*FieldData_Scalars
 	//	*FieldData_Vectors
 	Field                isFieldData_Field `protobuf_oneof:"field"`
@@ -944,7 +1111,7 @@ func (m *FieldData) Reset()         { *m = FieldData{} }
 func (m *FieldData) String() string { return proto.CompactTextString(m) }
 func (*FieldData) ProtoMessage()    {}
 func (*FieldData) Descriptor() ([]byte, []int) {
-	return fileDescriptor_1c5fb4d8cc22d66a, []int{13}
+	return fileDescriptor_1c5fb4d8cc22d66a, []int{14}
 }
 
 func (m *FieldData) XXX_Unmarshal(b []byte) error {
@@ -1033,6 +1200,7 @@ func (*FieldData) XXX_OneofWrappers() []interface{} {
 
 type IDs struct {
 	// Types that are valid to be assigned to IdField:
+	//
 	//	*IDs_IntId
 	//	*IDs_StrId
 	IdField              isIDs_IdField `protobuf_oneof:"id_field"`
@@ -1045,7 +1213,7 @@ func (m *IDs) Reset()         { *m = IDs{} }
 func (m *IDs) String() string { return proto.CompactTextString(m) }
 func (*IDs) ProtoMessage()    {}
 func (*IDs) Descriptor() ([]byte, []int) {
-	return fileDescriptor_1c5fb4d8cc22d66a, []int{14}
+	return fileDescriptor_1c5fb4d8cc22d66a, []int{15}
 }
 
 func (m *IDs) XXX_Unmarshal(b []byte) error {
@@ -1127,7 +1295,7 @@ func (m *SearchResultData) Reset()         { *m = SearchResultData{} }
 func (m *SearchResultData) String() string { return proto.CompactTextString(m) }
 func (*SearchResultData) ProtoMessage()    {}
 func (*SearchResultData) Descriptor() ([]byte, []int) {
-	return fileDescriptor_1c5fb4d8cc22d66a, []int{15}
+	return fileDescriptor_1c5fb4d8cc22d66a, []int{16}
 }
 
 func (m *SearchResultData) XXX_Unmarshal(b []byte) error {
@@ -1204,6 +1372,7 @@ func init() {
 	proto.RegisterType((*StringArray)(nil), "milvus.proto.schema.StringArray")
 	proto.RegisterType((*ArrayArray)(nil), "milvus.proto.schema.ArrayArray")
 	proto.RegisterType((*JSONArray)(nil), "milvus.proto.schema.JSONArray")
+	proto.RegisterType((*ValueField)(nil), "milvus.proto.schema.ValueField")
 	proto.RegisterType((*ScalarField)(nil), "milvus.proto.schema.ScalarField")
 	proto.RegisterType((*VectorField)(nil), "milvus.proto.schema.VectorField")
 	proto.RegisterType((*FieldData)(nil), "milvus.proto.schema.FieldData")
@@ -1214,77 +1383,82 @@ func init() {
 func init() { proto.RegisterFile("schema.proto", fileDescriptor_1c5fb4d8cc22d66a) }
 
 var fileDescriptor_1c5fb4d8cc22d66a = []byte{
-	// 1144 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x94, 0x56, 0xdf, 0x6e, 0x1b, 0xc5,
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-	0x7e, 0xac, 0x6d, 0xf2, 0x1e, 0xdc, 0xe5, 0x72, 0x98, 0x17, 0x7c, 0x42, 0x8b, 0xd9, 0xf0, 0x9a,
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-	0x0e, 0xbf, 0xdb, 0xa7, 0x8a, 0x7e, 0x3d, 0xcb, 0x59, 0xec, 0x25, 0xd6, 0x22, 0x3d, 0x08, 0x10,
-	0x36, 0xcc, 0x69, 0x41, 0x27, 0x32, 0x6a, 0xb4, 0xdd, 0x6e, 0x70, 0xf0, 0xe8, 0x4d, 0xb4, 0x4d,
-	0xf9, 0x84, 0xcd, 0x2e, 0x68, 0x3a, 0x65, 0x67, 0x94, 0x17, 0x31, 0x20, 0xea, 0x4c, 0x83, 0x48,
-	0x1f, 0x5a, 0x3c, 0x4b, 0xd8, 0x0f, 0x25, 0x49, 0xf3, 0xb6, 0x24, 0x81, 0x86, 0x59, 0x96, 0x2d,
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+	0xfa, 0x17, 0xfa, 0xdb, 0x4e, 0x54, 0x51, 0x32, 0x7b, 0x4d, 0x3f, 0x07, 0xdf, 0xfc, 0x62, 0xa7,
+	0x13, 0xc4, 0xd9, 0x7a, 0x9f, 0x59, 0xe5, 0x23, 0x53, 0x44, 0xd3, 0x33, 0x77, 0xa0, 0x56, 0x0c,
+	0x65, 0xce, 0xcd, 0x3f, 0xbd, 0x1c, 0xd9, 0x15, 0xbd, 0x0f, 0x8e, 0x88, 0x0b, 0x3b, 0x0f, 0xc2,
+	0xcd, 0xf3, 0xac, 0x5b, 0x44, 0x08, 0xa2, 0xb7, 0xf5, 0xc9, 0x2e, 0xcc, 0xab, 0xce, 0x89, 0xcc,
+	0xe2, 0xfe, 0xef, 0x04, 0xdc, 0xa9, 0x7e, 0xa8, 0x0b, 0x95, 0x37, 0x32, 0xe5, 0x41, 0x09, 0x2d,
+	0x1c, 0xa3, 0x01, 0x41, 0xab, 0x97, 0xaa, 0x67, 0x41, 0x99, 0x7a, 0x50, 0xed, 0xa5, 0xea, 0xd1,
+	0xd3, 0xc0, 0xb1, 0xe6, 0xe3, 0xfd, 0xa0, 0x62, 0xcd, 0xa7, 0x4f, 0x82, 0x2a, 0x9a, 0xba, 0x0b,
+	0x02, 0xa0, 0x00, 0x35, 0x33, 0x88, 0x02, 0x1f, 0x6d, 0x43, 0x76, 0x70, 0x9b, 0xfa, 0x50, 0x3f,
+	0x61, 0xf9, 0xc1, 0x39, 0xcb, 0x83, 0x77, 0x10, 0xaf, 0xf9, 0x0f, 0xee, 0xe0, 0x57, 0xb0, 0x59,
+	0x83, 0x77, 0x69, 0x00, 0x8d, 0xce, 0x42, 0x5b, 0x04, 0x31, 0xfd, 0x1f, 0xf8, 0xaf, 0xe6, 0xed,
+	0x14, 0xf0, 0xfb, 0x27, 0x00, 0xf3, 0x17, 0x1e, 0x06, 0xe8, 0xd5, 0x41, 0xce, 0x99, 0xe2, 0x71,
+	0x50, 0xa2, 0xff, 0x87, 0x1b, 0x73, 0x0f, 0x7e, 0x97, 0xcc, 0x5c, 0xdd, 0x5c, 0x66, 0x19, 0xba,
+	0xca, 0xb3, 0x38, 0xed, 0xe2, 0x71, 0xe0, 0x74, 0xbe, 0x83, 0x9b, 0x42, 0x4e, 0x49, 0x3c, 0xcb,
+	0xb3, 0x61, 0xc7, 0x37, 0x2f, 0xa4, 0x23, 0x24, 0xf4, 0x88, 0x7c, 0xff, 0xe8, 0x4c, 0xa8, 0xf3,
+	0xf1, 0x00, 0x5f, 0xaf, 0x0f, 0x0d, 0xec, 0x81, 0x90, 0x53, 0x4b, 0xb3, 0xfe, 0xf0, 0x4c, 0x3e,
+	0x60, 0x99, 0x78, 0x68, 0xc8, 0xcf, 0x06, 0x6f, 0x09, 0x19, 0xd4, 0xf4, 0xce, 0xe3, 0x7f, 0x02,
+	0x00, 0x00, 0xff, 0xff, 0xf2, 0x1d, 0xf9, 0x3b, 0x50, 0x0c, 0x00, 0x00,
 }
diff --git a/proto/schema.proto b/proto/schema.proto
index b582a79..3b8c066 100644
--- a/proto/schema.proto
+++ b/proto/schema.proto
@@ -55,6 +55,7 @@ message FieldSchema {
   FieldState state = 9; // To keep compatible with older version, the default
                         // state is `Created`.
   DataType element_type = 10; // For array type, the element type is stored here
+  ValueField default_value = 11; // default_value only support scalars except array and json for now
 }
 
 /**
@@ -89,6 +90,18 @@ message ArrayArray {
 
 message JSONArray { repeated bytes data = 1; }
 
+message ValueField {
+  oneof data {
+    bool bool_data = 1;
+    int32 int_data = 2;
+    int64 long_data = 3;
+    float float_data = 4;
+    double double_data = 5;
+    string string_data = 6;
+    bytes bytes_data = 7;
+  }
+}
+
 message ScalarField {
   oneof data {
     BoolArray bool_data = 1;