diff --git a/go-tipb/select.pb.go b/go-tipb/select.pb.go
index eff023cc8..d5fb7af1f 100644
--- a/go-tipb/select.pb.go
+++ b/go-tipb/select.pb.go
@@ -11,7 +11,6 @@ import (
 	_ "github.com/gogo/protobuf/gogoproto"
 	github_com_golang_protobuf_proto "github.com/golang/protobuf/proto"
 	proto "github.com/golang/protobuf/proto"
-	github_com_pingcap_tipb_sharedbytes "github.com/pingcap/tipb/sharedbytes"
 
 	math_bits "math/bits"
 )
@@ -397,7 +396,7 @@ func (m *SelectResponse) GetIntermediateOutputs() []*IntermediateOutput {
 // Chunk contains multiple rows data and rows meta.
 type Chunk struct {
 	// Data for all rows in the chunk.
-	RowsData github_com_pingcap_tipb_sharedbytes.SharedBytes `protobuf:"bytes,3,opt,name=rows_data,json=rowsData,customtype=github.com/pingcap/tipb/sharedbytes.SharedBytes" json:"rows_data"`
+	RowsData []byte `protobuf:"bytes,3,opt,name=rows_data,json=rowsData" json:"rows_data"`
 	// Meta data for every row.
 	RowsMeta []RowMeta `protobuf:"bytes,4,rep,name=rows_meta,json=rowsMeta" json:"rows_meta"`
 }
@@ -435,6 +434,13 @@ func (m *Chunk) XXX_DiscardUnknown() {
 
 var xxx_messageInfo_Chunk proto.InternalMessageInfo
 
+func (m *Chunk) GetRowsData() []byte {
+	if m != nil {
+		return m.RowsData
+	}
+	return nil
+}
+
 func (m *Chunk) GetRowsMeta() []RowMeta {
 	if m != nil {
 		return m.RowsMeta
@@ -888,8 +894,8 @@ func (m *UserIdentity) GetUserHost() string {
 type StreamResponse struct {
 	Error *Error `protobuf:"bytes,1,opt,name=error" json:"error,omitempty"`
 	// Data for all rows
-	Data     github_com_pingcap_tipb_sharedbytes.SharedBytes `protobuf:"bytes,3,opt,name=data,customtype=github.com/pingcap/tipb/sharedbytes.SharedBytes" json:"data"`
-	Warnings []*Error                                        `protobuf:"bytes,4,rep,name=warnings" json:"warnings,omitempty"`
+	Data     []byte   `protobuf:"bytes,3,opt,name=data" json:"data"`
+	Warnings []*Error `protobuf:"bytes,4,rep,name=warnings" json:"warnings,omitempty"`
 	// output row count for each executor
 	OutputCounts []int64 `protobuf:"varint,5,rep,name=output_counts,json=outputCounts" json:"output_counts,omitempty"`
 	WarningCount *int64  `protobuf:"varint,6,opt,name=warning_count,json=warningCount" json:"warning_count,omitempty"`
@@ -936,6 +942,13 @@ func (m *StreamResponse) GetError() *Error {
 	return nil
 }
 
+func (m *StreamResponse) GetData() []byte {
+	if m != nil {
+		return m.Data
+	}
+	return nil
+}
+
 func (m *StreamResponse) GetWarnings() []*Error {
 	if m != nil {
 		return m.Warnings
@@ -983,82 +996,79 @@ func init() {
 func init() { proto.RegisterFile("select.proto", fileDescriptor_86353caa10f8b4d7) }
 
 var fileDescriptor_86353caa10f8b4d7 = []byte{
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+	0xdf, 0xde, 0xb1, 0xb7, 0x5b, 0xd1, 0x8c, 0x32, 0xc3, 0x1d, 0x6d, 0x37, 0xf7, 0x10, 0xb9, 0x88,
+	0x44, 0x44, 0x5c, 0xae, 0x53, 0xed, 0xbd, 0xeb, 0x84, 0xa0, 0x44, 0xc3, 0x23, 0xe1, 0x82, 0x0e,
+	0x45, 0x7f, 0xa3, 0x6f, 0x60, 0x35, 0xca, 0x49, 0xc1, 0x37, 0xf1, 0x09, 0xb7, 0xae, 0xdd, 0x73,
+	0xcd, 0xa9, 0x57, 0xc5, 0xe2, 0xad, 0x44, 0x57, 0x30, 0xd1, 0xfb, 0x11, 0xca, 0x3a, 0xe9, 0xe8,
+	0x1e, 0xd4, 0x54, 0x65, 0x7c, 0x2d, 0xda, 0xa2, 0x12, 0xad, 0x75, 0xa7, 0xaa, 0xe0, 0x67, 0x58,
+	0x62, 0xf4, 0xc8, 0x9a, 0x24, 0x44, 0x62, 0x5b, 0x8a, 0xe6, 0x59, 0x61, 0x5f, 0x11, 0x89, 0xf3,
+	0x3b, 0xd4, 0xba, 0x77, 0x00, 0xb7, 0xaf, 0x3a, 0xb2, 0xb1, 0x8f, 0x29, 0x25, 0x31, 0xba, 0x0f,
+	0x8d, 0xac, 0xf3, 0xfc, 0x28, 0x9c, 0xb9, 0x4e, 0x77, 0xa1, 0xdf, 0xb4, 0x47, 0xd4, 0x33, 0x66,
+	0x33, 0x9c, 0xa1, 0x0f, 0xa1, 0x65, 0x0b, 0xcb, 0xc6, 0x63, 0x41, 0xa4, 0x51, 0x55, 0xd3, 0xb3,
+	0xe5, 0xde, 0x32, 0x60, 0x6f, 0x04, 0x8b, 0xd6, 0x0f, 0x74, 0xe7, 0x42, 0x53, 0x16, 0x33, 0x45,
+	0xd9, 0xd6, 0xbc, 0x03, 0x95, 0x98, 0xd0, 0x89, 0xdc, 0xd7, 0x6d, 0x76, 0xc6, 0x1a, 0xac, 0xf7,
+	0xdb, 0x22, 0xc0, 0xb3, 0xa7, 0xcf, 0x3d, 0x72, 0x38, 0x25, 0x42, 0xa2, 0x01, 0x2c, 0x0b, 0x89,
+	0xb9, 0xf4, 0xa5, 0xf0, 0xc7, 0x38, 0x8e, 0xf7, 0x70, 0x70, 0xa0, 0x4f, 0x2d, 0x79, 0x4b, 0x9a,
+	0xd8, 0x15, 0x5f, 0x5b, 0x18, 0x3d, 0x84, 0x5a, 0xe6, 0x77, 0xa6, 0xfc, 0xd6, 0x45, 0xb5, 0x78,
+	0xe7, 0x06, 0x68, 0x08, 0x6d, 0x19, 0x25, 0xc4, 0xff, 0x89, 0x51, 0x62, 0x23, 0xd3, 0x89, 0xcf,
+	0x1c, 0x6a, 0x29, 0xf6, 0x07, 0x46, 0x89, 0x09, 0x10, 0xad, 0x41, 0x79, 0x1c, 0x63, 0xdd, 0x05,
+	0x4e, 0xbf, 0x64, 0x8d, 0x0c, 0x74, 0x4d, 0x8a, 0xca, 0xd7, 0xa4, 0x08, 0x3d, 0x82, 0xd5, 0x80,
+	0xc5, 0xaa, 0x97, 0x7d, 0x8e, 0xe9, 0x84, 0x64, 0x9d, 0xa2, 0x9a, 0xa0, 0xea, 0x21, 0xcb, 0x79,
+	0x8a, 0xb2, 0xfd, 0x32, 0x80, 0xe5, 0x04, 0xcf, 0xfc, 0x8b, 0x3d, 0xb3, 0x68, 0xc2, 0x4f, 0xf0,
+	0xec, 0xfb, 0x7c, 0xdb, 0x5c, 0x52, 0x79, 0xf5, 0xbd, 0x55, 0x7e, 0x1b, 0xaa, 0xe2, 0x30, 0xf6,
+	0x13, 0x35, 0x12, 0x6b, 0xfa, 0xec, 0x45, 0x71, 0x18, 0xbf, 0x52, 0xf3, 0x70, 0x00, 0xad, 0xf3,
+	0x24, 0x51, 0x9c, 0x10, 0xb7, 0x9e, 0x1b, 0x8d, 0x8d, 0x2c, 0x45, 0xdf, 0xe2, 0x84, 0xa0, 0x2f,
+	0xe1, 0x7f, 0x59, 0x74, 0xd7, 0xb5, 0x6f, 0x43, 0x07, 0x79, 0xdb, 0x9a, 0x8c, 0xae, 0x76, 0xe9,
+	0x43, 0x40, 0x2a, 0x56, 0x1c, 0xc7, 0xec, 0x98, 0x84, 0x7e, 0x8a, 0x83, 0x03, 0x22, 0xdd, 0xa6,
+	0x76, 0xa8, 0x9d, 0xe0, 0xd9, 0x53, 0x43, 0x6c, 0x6b, 0x1c, 0x3d, 0x87, 0x15, 0x3d, 0xa1, 0xfc,
+	0x84, 0x24, 0x8c, 0xcf, 0xfd, 0x18, 0xcf, 0xd9, 0x54, 0xba, 0x2d, 0x3d, 0x12, 0x6f, 0xe5, 0xe6,
+	0xd9, 0x2b, 0xcd, 0xbf, 0xd4, 0xb4, 0xb7, 0x1c, 0x5c, 0x86, 0x50, 0x07, 0xea, 0x91, 0xf0, 0x79,
+	0x4a, 0x7d, 0x32, 0x4b, 0xb9, 0xbb, 0xa4, 0xdd, 0xac, 0x45, 0xc2, 0x4b, 0xe9, 0x68, 0x96, 0x72,
+	0xf4, 0x11, 0x94, 0xa6, 0x82, 0x70, 0xb7, 0xad, 0x4f, 0x46, 0xe6, 0xe4, 0xef, 0x04, 0xe1, 0x9b,
+	0x21, 0xa1, 0x32, 0x92, 0x73, 0x4f, 0xf3, 0xe8, 0x53, 0x68, 0x72, 0xc6, 0xb2, 0xd8, 0x19, 0x77,
+	0x97, 0xf5, 0x86, 0xcb, 0x0a, 0x6c, 0x28, 0xa3, 0x6c, 0xa5, 0xea, 0x3b, 0x66, 0x3c, 0x20, 0x7e,
+	0xbe, 0x72, 0x48, 0xbb, 0xb0, 0xa4, 0x89, 0xf3, 0xc2, 0xa1, 0xcf, 0xe0, 0x56, 0x18, 0x1d, 0xf9,
+	0x29, 0x27, 0x41, 0x24, 0x54, 0x6e, 0x23, 0x1a, 0x70, 0x92, 0x10, 0x2a, 0xdd, 0x95, 0xae, 0xd3,
+	0x6f, 0x7a, 0x37, 0xc2, 0xe8, 0x68, 0x3b, 0x63, 0x37, 0x33, 0x12, 0x61, 0xb8, 0x73, 0xcd, 0xc0,
+	0xf2, 0x03, 0x33, 0x07, 0x84, 0xbb, 0xaa, 0x3b, 0xe5, 0xee, 0xbb, 0x06, 0x97, 0x9d, 0x17, 0xde,
+	0x5a, 0xf4, 0x2e, 0x4a, 0xf4, 0xbe, 0x82, 0xe5, 0x2b, 0xb9, 0x46, 0x03, 0xa8, 0x10, 0x1a, 0x46,
+	0x98, 0xda, 0x87, 0xb1, 0x91, 0x49, 0x51, 0x61, 0x59, 0xd7, 0x1b, 0x8b, 0xde, 0x2e, 0x34, 0xf2,
+	0x29, 0x55, 0xe3, 0x50, 0x25, 0xd5, 0x48, 0xce, 0xc9, 0x49, 0xae, 0xaa, 0x60, 0x2d, 0xb7, 0xcc,
+	0x64, 0x9f, 0x09, 0x79, 0xe1, 0xc1, 0xd6, 0x26, 0x2f, 0x98, 0x90, 0xbd, 0xdf, 0x1d, 0x68, 0xed,
+	0x48, 0x4e, 0x70, 0xf2, 0x6f, 0xde, 0x4e, 0xd7, 0xfe, 0x75, 0xc8, 0x4f, 0x61, 0x8d, 0xfc, 0x17,
+	0x6f, 0x61, 0xf6, 0x02, 0x2d, 0x9e, 0xbf, 0x40, 0x83, 0x2f, 0x00, 0x72, 0xb2, 0x58, 0x82, 0xba,
+	0xfa, 0x7d, 0x46, 0xc6, 0x78, 0x1a, 0xcb, 0x76, 0x01, 0x35, 0xa1, 0xa6, 0x00, 0x5d, 0x90, 0xb6,
+	0x93, 0xf1, 0x1b, 0x2f, 0xd6, 0x63, 0x16, 0x1c, 0xb4, 0x17, 0x06, 0x0f, 0xa0, 0x62, 0x6a, 0x80,
+	0xda, 0xd0, 0x78, 0x19, 0x49, 0x19, 0x13, 0xb3, 0x36, 0x7b, 0xd7, 0xa3, 0x89, 0x5d, 0x3a, 0xeb,
+	0x4f, 0xde, 0xfe, 0x5a, 0x75, 0x5e, 0x9f, 0x74, 0x9c, 0x37, 0x27, 0x1d, 0xe7, 0xaf, 0x93, 0x8e,
+	0xf3, 0xf3, 0x69, 0xa7, 0xf0, 0xcb, 0x69, 0xa7, 0xf0, 0xe6, 0xb4, 0x53, 0x78, 0x7b, 0xda, 0x29,
+	0xc0, 0x8d, 0x80, 0x25, 0xc3, 0x34, 0xa2, 0x93, 0x00, 0xa7, 0x43, 0x19, 0x85, 0x7b, 0x3a, 0x21,
+	0xdb, 0xce, 0xdf, 0x01, 0x00, 0x00, 0xff, 0xff, 0xa4, 0x3d, 0x1c, 0x0b, 0xeb, 0x09, 0x00, 0x00,
 }
 
 func (m *Row) Marshal() (dAtA []byte, err error) {
@@ -1330,16 +1340,13 @@ func (m *Chunk) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 			dAtA[i] = 0x22
 		}
 	}
-	{
-		size := m.RowsData.Size()
-		i -= size
-		if _, err := m.RowsData.MarshalTo(dAtA[i:]); err != nil {
-			return 0, err
-		}
-		i = encodeVarintSelect(dAtA, i, uint64(size))
+	if m.RowsData != nil {
+		i -= len(m.RowsData)
+		copy(dAtA[i:], m.RowsData)
+		i = encodeVarintSelect(dAtA, i, uint64(len(m.RowsData)))
+		i--
+		dAtA[i] = 0x1a
 	}
-	i--
-	dAtA[i] = 0x1a
 	return len(dAtA) - i, nil
 }
 
@@ -1700,16 +1707,13 @@ func (m *StreamResponse) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 			dAtA[i] = 0x22
 		}
 	}
-	{
-		size := m.Data.Size()
-		i -= size
-		if _, err := m.Data.MarshalTo(dAtA[i:]); err != nil {
-			return 0, err
-		}
-		i = encodeVarintSelect(dAtA, i, uint64(size))
+	if m.Data != nil {
+		i -= len(m.Data)
+		copy(dAtA[i:], m.Data)
+		i = encodeVarintSelect(dAtA, i, uint64(len(m.Data)))
+		i--
+		dAtA[i] = 0x1a
 	}
-	i--
-	dAtA[i] = 0x1a
 	if m.Error != nil {
 		{
 			size, err := m.Error.MarshalToSizedBuffer(dAtA[:i])
@@ -1844,8 +1848,10 @@ func (m *Chunk) Size() (n int) {
 	}
 	var l int
 	_ = l
-	l = m.RowsData.Size()
-	n += 1 + l + sovSelect(uint64(l))
+	if m.RowsData != nil {
+		l = len(m.RowsData)
+		n += 1 + l + sovSelect(uint64(l))
+	}
 	if len(m.RowsMeta) > 0 {
 		for _, e := range m.RowsMeta {
 			l = e.Size()
@@ -1984,8 +1990,10 @@ func (m *StreamResponse) Size() (n int) {
 		l = m.Error.Size()
 		n += 1 + l + sovSelect(uint64(l))
 	}
-	l = m.Data.Size()
-	n += 1 + l + sovSelect(uint64(l))
+	if m.Data != nil {
+		l = len(m.Data)
+		n += 1 + l + sovSelect(uint64(l))
+	}
 	if len(m.Warnings) > 0 {
 		for _, e := range m.Warnings {
 			l = e.Size()
@@ -2841,8 +2849,9 @@ func (m *Chunk) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := m.RowsData.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
-				return err
+			m.RowsData = append(m.RowsData[:0], dAtA[iNdEx:postIndex]...)
+			if m.RowsData == nil {
+				m.RowsData = []byte{}
 			}
 			iNdEx = postIndex
 		case 4:
@@ -3990,8 +3999,9 @@ func (m *StreamResponse) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if err := m.Data.Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
-				return err
+			m.Data = append(m.Data[:0], dAtA[iNdEx:postIndex]...)
+			if m.Data == nil {
+				m.Data = []byte{}
 			}
 			iNdEx = postIndex
 		case 4:
diff --git a/proto.lock b/proto.lock
index b9baa2f4b..e9bfc1684 100644
--- a/proto.lock
+++ b/proto.lock
@@ -7315,10 +7315,6 @@
                 "type": "bytes",
                 "optional": true,
                 "options": [
-                  {
-                    "name": "(gogoproto.customtype)",
-                    "value": "github.com/pingcap/tipb/sharedbytes.SharedBytes"
-                  },
                   {
                     "name": "(gogoproto.nullable)",
                     "value": "false"
@@ -7566,10 +7562,6 @@
                 "type": "bytes",
                 "optional": true,
                 "options": [
-                  {
-                    "name": "(gogoproto.customtype)",
-                    "value": "github.com/pingcap/tipb/sharedbytes.SharedBytes"
-                  },
                   {
                     "name": "(gogoproto.nullable)",
                     "value": "false"
diff --git a/proto/select.proto b/proto/select.proto
index 49629363e..e16b68647 100644
--- a/proto/select.proto
+++ b/proto/select.proto
@@ -50,7 +50,7 @@ message SelectResponse {
 	optional int64 warning_count = 6;
 
 	// Not used any more
-	// optional bytes row_batch_data = 7 [(gogoproto.customtype) = "github.com/pingcap/tipb/sharedbytes.SharedBytes", (gogoproto.nullable) = false];
+	// optional bytes row_batch_data = 7 [(gogoproto.nullable) = false];
 
 	// The execution summary of each executor, in the order in request.
 	repeated ExecutorExecutionSummary execution_summaries = 8;
@@ -66,7 +66,7 @@ message SelectResponse {
 // Chunk contains multiple rows data and rows meta.
 message Chunk {
 	// Data for all rows in the chunk.
-	optional bytes rows_data = 3 [(gogoproto.customtype) = "github.com/pingcap/tipb/sharedbytes.SharedBytes", (gogoproto.nullable) = false];
+	optional bytes rows_data = 3 [(gogoproto.nullable) = false];
 
 	// Meta data for every row.
 	repeated RowMeta rows_meta = 4 [(gogoproto.nullable) = false];
@@ -205,7 +205,7 @@ message UserIdentity {
 message StreamResponse {
 	optional Error error = 1;
 	// Data for all rows
-	optional bytes data = 3 [(gogoproto.customtype) = "github.com/pingcap/tipb/sharedbytes.SharedBytes", (gogoproto.nullable) = false];
+	optional bytes data = 3 [(gogoproto.nullable) = false];
 	repeated Error warnings = 4;
 	// output row count for each executor
 	repeated int64 output_counts = 5;
diff --git a/scripts/proto.lock b/scripts/proto.lock
index 13221eba0..0928d0382 100644
--- a/scripts/proto.lock
+++ b/scripts/proto.lock
@@ -7610,10 +7610,6 @@
                 "type": "bytes",
                 "optional": true,
                 "options": [
-                  {
-                    "name": "(gogoproto.customtype)",
-                    "value": "github.com/pingcap/tipb/sharedbytes.SharedBytes"
-                  },
                   {
                     "name": "(gogoproto.nullable)",
                     "value": "false"
@@ -7890,10 +7886,6 @@
                 "type": "bytes",
                 "optional": true,
                 "options": [
-                  {
-                    "name": "(gogoproto.customtype)",
-                    "value": "github.com/pingcap/tipb/sharedbytes.SharedBytes"
-                  },
                   {
                     "name": "(gogoproto.nullable)",
                     "value": "false"
diff --git a/sharedbytes/sharedbytes.go b/sharedbytes/sharedbytes.go
deleted file mode 100644
index 4dd461e0c..000000000
--- a/sharedbytes/sharedbytes.go
+++ /dev/null
@@ -1,42 +0,0 @@
-// Copyright 2017 PingCAP, Inc.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-package sharedbytes
-
-// SharedBytes is a custom type for protobuf, it does not
-// allocates memory in Unmarshal.
-type SharedBytes []byte
-
-// Marshal implements custom type for gogo/protobuf.
-func (sb SharedBytes) Marshal() ([]byte, error) {
-	data := make([]byte, len(sb))
-	copy(data, sb)
-	return data, nil
-}
-
-// MarshalTo implements custom type for gogo/protobuf.
-func (sb SharedBytes) MarshalTo(data []byte) (n int, err error) {
-	n = copy(data, sb)
-	return
-}
-
-// Unmarshal implements custom type for gogo/protobuf.
-func (sb *SharedBytes) Unmarshal(data []byte) error {
-	*sb = data
-	return nil
-}
-
-// Size implements custom type for gogo/protobuf.
-func (sb SharedBytes) Size() int {
-	return len(sb)
-}
diff --git a/sharedbytes/sharedbytes_test.go b/sharedbytes/sharedbytes_test.go
deleted file mode 100644
index 6d19f279a..000000000
--- a/sharedbytes/sharedbytes_test.go
+++ /dev/null
@@ -1,30 +0,0 @@
-package sharedbytes
-
-import (
-	"bytes"
-	"testing"
-)
-
-func TestShardBytes(t *testing.T) {
-	var sb SharedBytes
-	sb = []byte("abc")
-	x, err := sb.Marshal()
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !bytes.Equal(x, []byte("abc")) {
-		t.Fatal("marshal failed")
-	}
-	x = make([]byte, 3)
-	sb.MarshalTo(x)
-	if !bytes.Equal(x, []byte("abc")) {
-		t.Fatal("marshal failed")
-	}
-	sb = nil
-	if err := sb.Unmarshal([]byte("abc")); err != nil {
-		t.Fatal(err)
-	}
-	if !bytes.Equal(sb, []byte("abc")) {
-		t.Fatal("unmarshal failed")
-	}
-}