diff --git a/go/greptime/v1/ddl.pb.go b/go/greptime/v1/ddl.pb.go
index ac510989..f34cef14 100644
--- a/go/greptime/v1/ddl.pb.go
+++ b/go/greptime/v1/ddl.pb.go
@@ -441,6 +441,77 @@ func (x *DropTableExpr) GetTableName() string {
 	return ""
 }
 
+type FlushTableExpr struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	CatalogName string  `protobuf:"bytes,1,opt,name=catalog_name,json=catalogName,proto3" json:"catalog_name,omitempty"`
+	SchemaName  string  `protobuf:"bytes,2,opt,name=schema_name,json=schemaName,proto3" json:"schema_name,omitempty"`
+	TableName   string  `protobuf:"bytes,3,opt,name=table_name,json=tableName,proto3" json:"table_name,omitempty"`
+	RegionId    *uint32 `protobuf:"varint,4,opt,name=region_id,json=regionId,proto3,oneof" json:"region_id,omitempty"`
+}
+
+func (x *FlushTableExpr) Reset() {
+	*x = FlushTableExpr{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_greptime_v1_ddl_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *FlushTableExpr) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*FlushTableExpr) ProtoMessage() {}
+
+func (x *FlushTableExpr) ProtoReflect() protoreflect.Message {
+	mi := &file_greptime_v1_ddl_proto_msgTypes[4]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use FlushTableExpr.ProtoReflect.Descriptor instead.
+func (*FlushTableExpr) Descriptor() ([]byte, []int) {
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *FlushTableExpr) GetCatalogName() string {
+	if x != nil {
+		return x.CatalogName
+	}
+	return ""
+}
+
+func (x *FlushTableExpr) GetSchemaName() string {
+	if x != nil {
+		return x.SchemaName
+	}
+	return ""
+}
+
+func (x *FlushTableExpr) GetTableName() string {
+	if x != nil {
+		return x.TableName
+	}
+	return ""
+}
+
+func (x *FlushTableExpr) GetRegionId() uint32 {
+	if x != nil && x.RegionId != nil {
+		return *x.RegionId
+	}
+	return 0
+}
+
 type CreateDatabaseExpr struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -454,7 +525,7 @@ type CreateDatabaseExpr struct {
 func (x *CreateDatabaseExpr) Reset() {
 	*x = CreateDatabaseExpr{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_ddl_proto_msgTypes[4]
+		mi := &file_greptime_v1_ddl_proto_msgTypes[5]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -467,7 +538,7 @@ func (x *CreateDatabaseExpr) String() string {
 func (*CreateDatabaseExpr) ProtoMessage() {}
 
 func (x *CreateDatabaseExpr) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_ddl_proto_msgTypes[4]
+	mi := &file_greptime_v1_ddl_proto_msgTypes[5]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -480,7 +551,7 @@ func (x *CreateDatabaseExpr) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use CreateDatabaseExpr.ProtoReflect.Descriptor instead.
 func (*CreateDatabaseExpr) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{4}
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{5}
 }
 
 func (x *CreateDatabaseExpr) GetDatabaseName() string {
@@ -508,7 +579,7 @@ type AddColumns struct {
 func (x *AddColumns) Reset() {
 	*x = AddColumns{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_ddl_proto_msgTypes[5]
+		mi := &file_greptime_v1_ddl_proto_msgTypes[6]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -521,7 +592,7 @@ func (x *AddColumns) String() string {
 func (*AddColumns) ProtoMessage() {}
 
 func (x *AddColumns) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_ddl_proto_msgTypes[5]
+	mi := &file_greptime_v1_ddl_proto_msgTypes[6]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -534,7 +605,7 @@ func (x *AddColumns) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use AddColumns.ProtoReflect.Descriptor instead.
 func (*AddColumns) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{5}
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{6}
 }
 
 func (x *AddColumns) GetAddColumns() []*AddColumn {
@@ -555,7 +626,7 @@ type DropColumns struct {
 func (x *DropColumns) Reset() {
 	*x = DropColumns{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_ddl_proto_msgTypes[6]
+		mi := &file_greptime_v1_ddl_proto_msgTypes[7]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -568,7 +639,7 @@ func (x *DropColumns) String() string {
 func (*DropColumns) ProtoMessage() {}
 
 func (x *DropColumns) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_ddl_proto_msgTypes[6]
+	mi := &file_greptime_v1_ddl_proto_msgTypes[7]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -581,7 +652,7 @@ func (x *DropColumns) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DropColumns.ProtoReflect.Descriptor instead.
 func (*DropColumns) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{6}
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{7}
 }
 
 func (x *DropColumns) GetDropColumns() []*DropColumn {
@@ -602,7 +673,7 @@ type RenameTable struct {
 func (x *RenameTable) Reset() {
 	*x = RenameTable{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_ddl_proto_msgTypes[7]
+		mi := &file_greptime_v1_ddl_proto_msgTypes[8]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -615,7 +686,7 @@ func (x *RenameTable) String() string {
 func (*RenameTable) ProtoMessage() {}
 
 func (x *RenameTable) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_ddl_proto_msgTypes[7]
+	mi := &file_greptime_v1_ddl_proto_msgTypes[8]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -628,7 +699,7 @@ func (x *RenameTable) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use RenameTable.ProtoReflect.Descriptor instead.
 func (*RenameTable) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{7}
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{8}
 }
 
 func (x *RenameTable) GetNewTableName() string {
@@ -650,7 +721,7 @@ type AddColumn struct {
 func (x *AddColumn) Reset() {
 	*x = AddColumn{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_ddl_proto_msgTypes[8]
+		mi := &file_greptime_v1_ddl_proto_msgTypes[9]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -663,7 +734,7 @@ func (x *AddColumn) String() string {
 func (*AddColumn) ProtoMessage() {}
 
 func (x *AddColumn) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_ddl_proto_msgTypes[8]
+	mi := &file_greptime_v1_ddl_proto_msgTypes[9]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -676,7 +747,7 @@ func (x *AddColumn) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use AddColumn.ProtoReflect.Descriptor instead.
 func (*AddColumn) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{8}
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{9}
 }
 
 func (x *AddColumn) GetColumnDef() *ColumnDef {
@@ -704,7 +775,7 @@ type DropColumn struct {
 func (x *DropColumn) Reset() {
 	*x = DropColumn{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_ddl_proto_msgTypes[9]
+		mi := &file_greptime_v1_ddl_proto_msgTypes[10]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -717,7 +788,7 @@ func (x *DropColumn) String() string {
 func (*DropColumn) ProtoMessage() {}
 
 func (x *DropColumn) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_ddl_proto_msgTypes[9]
+	mi := &file_greptime_v1_ddl_proto_msgTypes[10]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -730,7 +801,7 @@ func (x *DropColumn) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DropColumn.ProtoReflect.Descriptor instead.
 func (*DropColumn) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{9}
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{10}
 }
 
 func (x *DropColumn) GetName() string {
@@ -751,7 +822,7 @@ type TableId struct {
 func (x *TableId) Reset() {
 	*x = TableId{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_ddl_proto_msgTypes[10]
+		mi := &file_greptime_v1_ddl_proto_msgTypes[11]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -764,7 +835,7 @@ func (x *TableId) String() string {
 func (*TableId) ProtoMessage() {}
 
 func (x *TableId) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_ddl_proto_msgTypes[10]
+	mi := &file_greptime_v1_ddl_proto_msgTypes[11]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -777,7 +848,7 @@ func (x *TableId) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use TableId.ProtoReflect.Descriptor instead.
 func (*TableId) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{10}
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{11}
 }
 
 func (x *TableId) GetId() uint32 {
@@ -871,41 +942,51 @@ var file_greptime_v1_ddl_proto_rawDesc = []byte{
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+	0x74, 0x61, 0x62, 0x6c, 0x65, 0x5f, 0x6e, 0x61, 0x6d, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09,
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+	0x0a, 0x09, 0x41, 0x64, 0x64, 0x43, 0x6f, 0x6c, 0x75, 0x6d, 0x6e, 0x12, 0x35, 0x0a, 0x0a, 0x63,
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+	0x16, 0x2e, 0x67, 0x72, 0x65, 0x70, 0x74, 0x69, 0x6d, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x43, 0x6f,
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+	0x01, 0x20, 0x01, 0x28, 0x09, 0x52, 0x04, 0x6e, 0x61, 0x6d, 0x65, 0x22, 0x19, 0x0a, 0x07, 0x54,
+	0x61, 0x62, 0x6c, 0x65, 0x49, 0x64, 0x12, 0x0e, 0x0a, 0x02, 0x69, 0x64, 0x18, 0x01, 0x20, 0x01,
+	0x28, 0x0d, 0x52, 0x02, 0x69, 0x64, 0x42, 0x4c, 0x0a, 0x0e, 0x69, 0x6f, 0x2e, 0x67, 0x72, 0x65,
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+	0x6d, 0x65, 0x54, 0x65, 0x61, 0x6d, 0x2f, 0x67, 0x72, 0x65, 0x70, 0x74, 0x69, 0x6d, 0x65, 0x2d,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x6f, 0x2f, 0x67, 0x72, 0x65, 0x70, 0x74, 0x69, 0x6d,
+	0x65, 0x2f, 0x76, 0x31, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -920,36 +1001,37 @@ func file_greptime_v1_ddl_proto_rawDescGZIP() []byte {
 	return file_greptime_v1_ddl_proto_rawDescData
 }
 
-var file_greptime_v1_ddl_proto_msgTypes = make([]protoimpl.MessageInfo, 12)
+var file_greptime_v1_ddl_proto_msgTypes = make([]protoimpl.MessageInfo, 13)
 var file_greptime_v1_ddl_proto_goTypes = []interface{}{
 	(*DdlRequest)(nil),         // 0: greptime.v1.DdlRequest
 	(*CreateTableExpr)(nil),    // 1: greptime.v1.CreateTableExpr
 	(*AlterExpr)(nil),          // 2: greptime.v1.AlterExpr
 	(*DropTableExpr)(nil),      // 3: greptime.v1.DropTableExpr
-	(*CreateDatabaseExpr)(nil), // 4: greptime.v1.CreateDatabaseExpr
-	(*AddColumns)(nil),         // 5: greptime.v1.AddColumns
-	(*DropColumns)(nil),        // 6: greptime.v1.DropColumns
-	(*RenameTable)(nil),        // 7: greptime.v1.RenameTable
-	(*AddColumn)(nil),          // 8: greptime.v1.AddColumn
-	(*DropColumn)(nil),         // 9: greptime.v1.DropColumn
-	(*TableId)(nil),            // 10: greptime.v1.TableId
-	nil,                        // 11: greptime.v1.CreateTableExpr.TableOptionsEntry
-	(*ColumnDef)(nil),          // 12: greptime.v1.ColumnDef
+	(*FlushTableExpr)(nil),     // 4: greptime.v1.FlushTableExpr
+	(*CreateDatabaseExpr)(nil), // 5: greptime.v1.CreateDatabaseExpr
+	(*AddColumns)(nil),         // 6: greptime.v1.AddColumns
+	(*DropColumns)(nil),        // 7: greptime.v1.DropColumns
+	(*RenameTable)(nil),        // 8: greptime.v1.RenameTable
+	(*AddColumn)(nil),          // 9: greptime.v1.AddColumn
+	(*DropColumn)(nil),         // 10: greptime.v1.DropColumn
+	(*TableId)(nil),            // 11: greptime.v1.TableId
+	nil,                        // 12: greptime.v1.CreateTableExpr.TableOptionsEntry
+	(*ColumnDef)(nil),          // 13: greptime.v1.ColumnDef
 }
 var file_greptime_v1_ddl_proto_depIdxs = []int32{
-	4,  // 0: greptime.v1.DdlRequest.create_database:type_name -> greptime.v1.CreateDatabaseExpr
+	5,  // 0: greptime.v1.DdlRequest.create_database:type_name -> greptime.v1.CreateDatabaseExpr
 	1,  // 1: greptime.v1.DdlRequest.create_table:type_name -> greptime.v1.CreateTableExpr
 	2,  // 2: greptime.v1.DdlRequest.alter:type_name -> greptime.v1.AlterExpr
 	3,  // 3: greptime.v1.DdlRequest.drop_table:type_name -> greptime.v1.DropTableExpr
-	12, // 4: greptime.v1.CreateTableExpr.column_defs:type_name -> greptime.v1.ColumnDef
-	11, // 5: greptime.v1.CreateTableExpr.table_options:type_name -> greptime.v1.CreateTableExpr.TableOptionsEntry
-	10, // 6: greptime.v1.CreateTableExpr.table_id:type_name -> greptime.v1.TableId
-	5,  // 7: greptime.v1.AlterExpr.add_columns:type_name -> greptime.v1.AddColumns
-	6,  // 8: greptime.v1.AlterExpr.drop_columns:type_name -> greptime.v1.DropColumns
-	7,  // 9: greptime.v1.AlterExpr.rename_table:type_name -> greptime.v1.RenameTable
-	8,  // 10: greptime.v1.AddColumns.add_columns:type_name -> greptime.v1.AddColumn
-	9,  // 11: greptime.v1.DropColumns.drop_columns:type_name -> greptime.v1.DropColumn
-	12, // 12: greptime.v1.AddColumn.column_def:type_name -> greptime.v1.ColumnDef
+	13, // 4: greptime.v1.CreateTableExpr.column_defs:type_name -> greptime.v1.ColumnDef
+	12, // 5: greptime.v1.CreateTableExpr.table_options:type_name -> greptime.v1.CreateTableExpr.TableOptionsEntry
+	11, // 6: greptime.v1.CreateTableExpr.table_id:type_name -> greptime.v1.TableId
+	6,  // 7: greptime.v1.AlterExpr.add_columns:type_name -> greptime.v1.AddColumns
+	7,  // 8: greptime.v1.AlterExpr.drop_columns:type_name -> greptime.v1.DropColumns
+	8,  // 9: greptime.v1.AlterExpr.rename_table:type_name -> greptime.v1.RenameTable
+	9,  // 10: greptime.v1.AddColumns.add_columns:type_name -> greptime.v1.AddColumn
+	10, // 11: greptime.v1.DropColumns.drop_columns:type_name -> greptime.v1.DropColumn
+	13, // 12: greptime.v1.AddColumn.column_def:type_name -> greptime.v1.ColumnDef
 	13, // [13:13] is the sub-list for method output_type
 	13, // [13:13] is the sub-list for method input_type
 	13, // [13:13] is the sub-list for extension type_name
@@ -1013,7 +1095,7 @@ func file_greptime_v1_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_ddl_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*CreateDatabaseExpr); i {
+			switch v := v.(*FlushTableExpr); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1025,7 +1107,7 @@ func file_greptime_v1_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_ddl_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*AddColumns); i {
+			switch v := v.(*CreateDatabaseExpr); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1037,7 +1119,7 @@ func file_greptime_v1_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_ddl_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DropColumns); i {
+			switch v := v.(*AddColumns); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1049,7 +1131,7 @@ func file_greptime_v1_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_ddl_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*RenameTable); i {
+			switch v := v.(*DropColumns); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1061,7 +1143,7 @@ func file_greptime_v1_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_ddl_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*AddColumn); i {
+			switch v := v.(*RenameTable); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1073,7 +1155,7 @@ func file_greptime_v1_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_ddl_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DropColumn); i {
+			switch v := v.(*AddColumn); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1085,6 +1167,18 @@ func file_greptime_v1_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_ddl_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DropColumn); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_greptime_v1_ddl_proto_msgTypes[11].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*TableId); i {
 			case 0:
 				return &v.state
@@ -1108,13 +1202,14 @@ func file_greptime_v1_ddl_proto_init() {
 		(*AlterExpr_DropColumns)(nil),
 		(*AlterExpr_RenameTable)(nil),
 	}
+	file_greptime_v1_ddl_proto_msgTypes[4].OneofWrappers = []interface{}{}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_greptime_v1_ddl_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   12,
+			NumMessages:   13,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/proto/greptime/v1/ddl.proto b/proto/greptime/v1/ddl.proto
index fce57d7f..3df92bfb 100644
--- a/proto/greptime/v1/ddl.proto
+++ b/proto/greptime/v1/ddl.proto
@@ -51,6 +51,13 @@ message DropTableExpr {
   string table_name = 3;
 }
 
+message FlushTableExpr {
+  string catalog_name = 1;
+  string schema_name = 2;
+  string table_name = 3;
+  optional uint32 region_id = 4;
+} 
+
 message CreateDatabaseExpr {
   //TODO(hl): maybe rename to schema_name?
   string database_name = 1;