feat: support batch ddl (#135)

* feat: support batch create table

* feat: ddl batch

* feat: batch ddl task

* feat: response table ids

go/greptime/v1/meta/ddl.pb.go

@@ -144,6 +144,53 @@ func (x *CreateTableTask) GetTableInfo() []byte {
 	return nil
 }
 
+type CreateTableTasks struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Tasks []*CreateTableTask `protobuf:"bytes,1,rep,name=tasks,proto3" json:"tasks,omitempty"`
+}
+
+func (x *CreateTableTasks) Reset() {
+	*x = CreateTableTasks{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CreateTableTasks) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CreateTableTasks) ProtoMessage() {}
+
+func (x *CreateTableTasks) ProtoReflect() protoreflect.Message {
+	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[1]
+	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 CreateTableTasks.ProtoReflect.Descriptor instead.
+func (*CreateTableTasks) Descriptor() ([]byte, []int) {
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *CreateTableTasks) GetTasks() []*CreateTableTask {
+	if x != nil {
+		return x.Tasks
+	}
+	return nil
+}
+
 type DropTableTask struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -155,7 +202,7 @@ type DropTableTask struct {
 func (x *DropTableTask) Reset() {
 	*x = DropTableTask{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[1]
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[2]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -168,7 +215,7 @@ func (x *DropTableTask) String() string {
 func (*DropTableTask) ProtoMessage() {}
 
 func (x *DropTableTask) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[1]
+	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[2]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -181,7 +228,7 @@ func (x *DropTableTask) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DropTableTask.ProtoReflect.Descriptor instead.
 func (*DropTableTask) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{1}
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{2}
 }
 
 func (x *DropTableTask) GetDropTable() *v1.DropTableExpr {
@@ -191,6 +238,53 @@ func (x *DropTableTask) GetDropTable() *v1.DropTableExpr {
 	return nil
 }
 
+type DropTableTasks struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Tasks []*DropTableTask `protobuf:"bytes,1,rep,name=tasks,proto3" json:"tasks,omitempty"`
+}
+
+func (x *DropTableTasks) Reset() {
+	*x = DropTableTasks{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *DropTableTasks) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*DropTableTasks) ProtoMessage() {}
+
+func (x *DropTableTasks) ProtoReflect() protoreflect.Message {
+	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[3]
+	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 DropTableTasks.ProtoReflect.Descriptor instead.
+func (*DropTableTasks) Descriptor() ([]byte, []int) {
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *DropTableTasks) GetTasks() []*DropTableTask {
+	if x != nil {
+		return x.Tasks
+	}
+	return nil
+}
+
 type AlterTableTask struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -202,7 +296,7 @@ type AlterTableTask struct {
 func (x *AlterTableTask) Reset() {
 	*x = AlterTableTask{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[2]
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[4]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -215,7 +309,7 @@ func (x *AlterTableTask) String() string {
 func (*AlterTableTask) ProtoMessage() {}
 
 func (x *AlterTableTask) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[2]
+	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[4]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -228,7 +322,7 @@ func (x *AlterTableTask) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use AlterTableTask.ProtoReflect.Descriptor instead.
 func (*AlterTableTask) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{2}
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{4}
 }
 
 func (x *AlterTableTask) GetAlterTable() *v1.AlterExpr {
@@ -238,6 +332,53 @@ func (x *AlterTableTask) GetAlterTable() *v1.AlterExpr {
 	return nil
 }
 
+type AlterTableTasks struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Tasks []*AlterTableTask `protobuf:"bytes,1,rep,name=tasks,proto3" json:"tasks,omitempty"`
+}
+
+func (x *AlterTableTasks) Reset() {
+	*x = AlterTableTasks{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[5]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *AlterTableTasks) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*AlterTableTasks) ProtoMessage() {}
+
+func (x *AlterTableTasks) ProtoReflect() protoreflect.Message {
+	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[5]
+	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 AlterTableTasks.ProtoReflect.Descriptor instead.
+func (*AlterTableTasks) Descriptor() ([]byte, []int) {
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{5}
+}
+
+func (x *AlterTableTasks) GetTasks() []*AlterTableTask {
+	if x != nil {
+		return x.Tasks
+	}
+	return nil
+}
+
 type TruncateTableTask struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -249,7 +390,7 @@ type TruncateTableTask struct {
 func (x *TruncateTableTask) Reset() {
 	*x = TruncateTableTask{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[3]
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[6]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -262,7 +403,7 @@ func (x *TruncateTableTask) String() string {
 func (*TruncateTableTask) ProtoMessage() {}
 
 func (x *TruncateTableTask) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[3]
+	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[6]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -275,7 +416,7 @@ func (x *TruncateTableTask) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use TruncateTableTask.ProtoReflect.Descriptor instead.
 func (*TruncateTableTask) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{3}
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{6}
 }
 
 func (x *TruncateTableTask) GetTruncateTable() *v1.TruncateTableExpr {
@@ -297,13 +438,16 @@ type SubmitDdlTaskRequest struct {
 	//	*SubmitDdlTaskRequest_DropTableTask
 	//	*SubmitDdlTaskRequest_AlterTableTask
 	//	*SubmitDdlTaskRequest_TruncateTableTask
+	//	*SubmitDdlTaskRequest_CreateTableTasks
+	//	*SubmitDdlTaskRequest_DropTableTasks
+	//	*SubmitDdlTaskRequest_AlterTableTasks
 	Task isSubmitDdlTaskRequest_Task `protobuf_oneof:"task"`
 }
 
 func (x *SubmitDdlTaskRequest) Reset() {
 	*x = SubmitDdlTaskRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[4]
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[7]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -316,7 +460,7 @@ func (x *SubmitDdlTaskRequest) String() string {
 func (*SubmitDdlTaskRequest) ProtoMessage() {}
 
 func (x *SubmitDdlTaskRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[4]
+	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[7]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -329,7 +473,7 @@ func (x *SubmitDdlTaskRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SubmitDdlTaskRequest.ProtoReflect.Descriptor instead.
 func (*SubmitDdlTaskRequest) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{4}
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{7}
 }
 
 func (x *SubmitDdlTaskRequest) GetHeader() *RequestHeader {
@@ -374,6 +518,27 @@ func (x *SubmitDdlTaskRequest) GetTruncateTableTask() *TruncateTableTask {
 	return nil
 }
 
+func (x *SubmitDdlTaskRequest) GetCreateTableTasks() *CreateTableTasks {
+	if x, ok := x.GetTask().(*SubmitDdlTaskRequest_CreateTableTasks); ok {
+		return x.CreateTableTasks
+	}
+	return nil
+}
+
+func (x *SubmitDdlTaskRequest) GetDropTableTasks() *DropTableTasks {
+	if x, ok := x.GetTask().(*SubmitDdlTaskRequest_DropTableTasks); ok {
+		return x.DropTableTasks
+	}
+	return nil
+}
+
+func (x *SubmitDdlTaskRequest) GetAlterTableTasks() *AlterTableTasks {
+	if x, ok := x.GetTask().(*SubmitDdlTaskRequest_AlterTableTasks); ok {
+		return x.AlterTableTasks
+	}
+	return nil
+}
+
 type isSubmitDdlTaskRequest_Task interface {
 	isSubmitDdlTaskRequest_Task()
 }
@@ -394,6 +559,18 @@ type SubmitDdlTaskRequest_TruncateTableTask struct {
 	TruncateTableTask *TruncateTableTask `protobuf:"bytes,5,opt,name=truncate_table_task,json=truncateTableTask,proto3,oneof"`
 }
 
+type SubmitDdlTaskRequest_CreateTableTasks struct {
+	CreateTableTasks *CreateTableTasks `protobuf:"bytes,6,opt,name=create_table_tasks,json=createTableTasks,proto3,oneof"`
+}
+
+type SubmitDdlTaskRequest_DropTableTasks struct {
+	DropTableTasks *DropTableTasks `protobuf:"bytes,7,opt,name=drop_table_tasks,json=dropTableTasks,proto3,oneof"`
+}
+
+type SubmitDdlTaskRequest_AlterTableTasks struct {
+	AlterTableTasks *AlterTableTasks `protobuf:"bytes,8,opt,name=alter_table_tasks,json=alterTableTasks,proto3,oneof"`
+}
+
 func (*SubmitDdlTaskRequest_CreateTableTask) isSubmitDdlTaskRequest_Task() {}
 
 func (*SubmitDdlTaskRequest_DropTableTask) isSubmitDdlTaskRequest_Task() {}
@@ -402,6 +579,12 @@ func (*SubmitDdlTaskRequest_AlterTableTask) isSubmitDdlTaskRequest_Task() {}
 
 func (*SubmitDdlTaskRequest_TruncateTableTask) isSubmitDdlTaskRequest_Task() {}
 
+func (*SubmitDdlTaskRequest_CreateTableTasks) isSubmitDdlTaskRequest_Task() {}
+
+func (*SubmitDdlTaskRequest_DropTableTasks) isSubmitDdlTaskRequest_Task() {}
+
+func (*SubmitDdlTaskRequest_AlterTableTasks) isSubmitDdlTaskRequest_Task() {}
+
 type SubmitDdlTaskResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -411,13 +594,16 @@ type SubmitDdlTaskResponse struct {
 	// Key is the identifier for the ddl task.
 	Key []byte `protobuf:"bytes,2,opt,name=key,proto3" json:"key,omitempty"`
 	// Returns if table created.
+	// TODO(jeremy): remove it?
 	TableId *TableId `protobuf:"bytes,4,opt,name=table_id,json=tableId,proto3" json:"table_id,omitempty"`
+	// Returns if the tables created.
+	TableIds []*TableId `protobuf:"bytes,5,rep,name=table_ids,json=tableIds,proto3" json:"table_ids,omitempty"`
 }
 
 func (x *SubmitDdlTaskResponse) Reset() {
 	*x = SubmitDdlTaskResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[5]
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[8]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -430,7 +616,7 @@ func (x *SubmitDdlTaskResponse) String() string {
 func (*SubmitDdlTaskResponse) ProtoMessage() {}
 
 func (x *SubmitDdlTaskResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[5]
+	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[8]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -443,7 +629,7 @@ func (x *SubmitDdlTaskResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use SubmitDdlTaskResponse.ProtoReflect.Descriptor instead.
 func (*SubmitDdlTaskResponse) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{5}
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{8}
 }
 
 func (x *SubmitDdlTaskResponse) GetHeader() *ResponseHeader {
@@ -467,6 +653,13 @@ func (x *SubmitDdlTaskResponse) GetTableId() *TableId {
 	return nil
 }
 
+func (x *SubmitDdlTaskResponse) GetTableIds() []*TableId {
+	if x != nil {
+		return x.TableIds
+	}
+	return nil
+}
+
 var File_greptime_v1_meta_ddl_proto protoreflect.FileDescriptor
 
 var file_greptime_v1_meta_ddl_proto_rawDesc = []byte{
@@ -489,71 +682,104 @@ var file_greptime_v1_meta_ddl_proto_rawDesc = []byte{
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+	0x64, 0x12, 0x36, 0x0a, 0x09, 0x74, 0x61, 0x62, 0x6c, 0x65, 0x5f, 0x69, 0x64, 0x73, 0x18, 0x05,
+	0x20, 0x03, 0x28, 0x0b, 0x32, 0x19, 0x2e, 0x67, 0x72, 0x65, 0x70, 0x74, 0x69, 0x6d, 0x65, 0x2e,
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+	0x08, 0x74, 0x61, 0x62, 0x6c, 0x65, 0x49, 0x64, 0x73, 0x2a, 0x23, 0x0a, 0x0b, 0x44, 0x64, 0x6c,
+	0x54, 0x61, 0x73, 0x6b, 0x54, 0x79, 0x70, 0x65, 0x12, 0x0a, 0x0a, 0x06, 0x43, 0x72, 0x65, 0x61,
+	0x74, 0x65, 0x10, 0x00, 0x12, 0x08, 0x0a, 0x04, 0x44, 0x72, 0x6f, 0x70, 0x10, 0x01, 0x32, 0x6b,
+	0x0a, 0x07, 0x44, 0x64, 0x6c, 0x54, 0x61, 0x73, 0x6b, 0x12, 0x60, 0x0a, 0x0d, 0x53, 0x75, 0x62,
+	0x6d, 0x69, 0x74, 0x44, 0x64, 0x6c, 0x54, 0x61, 0x73, 0x6b, 0x12, 0x26, 0x2e, 0x67, 0x72, 0x65,
+	0x70, 0x74, 0x69, 0x6d, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x6d, 0x65, 0x74, 0x61, 0x2e, 0x53, 0x75,
+	0x62, 0x6d, 0x69, 0x74, 0x44, 0x64, 0x6c, 0x54, 0x61, 0x73, 0x6b, 0x52, 0x65, 0x71, 0x75, 0x65,
+	0x73, 0x74, 0x1a, 0x27, 0x2e, 0x67, 0x72, 0x65, 0x70, 0x74, 0x69, 0x6d, 0x65, 0x2e, 0x76, 0x31,
+	0x2e, 0x6d, 0x65, 0x74, 0x61, 0x2e, 0x53, 0x75, 0x62, 0x6d, 0x69, 0x74, 0x44, 0x64, 0x6c, 0x54,
+	0x61, 0x73, 0x6b, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x42, 0x3c, 0x5a, 0x3a, 0x67,
+	0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x47, 0x72, 0x65, 0x70, 0x74, 0x69,
+	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, 0x2f, 0x6d, 0x65, 0x74, 0x61, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x33,
 }
 
 var (
@@ -569,44 +795,54 @@ func file_greptime_v1_meta_ddl_proto_rawDescGZIP() []byte {
 }
 
 var file_greptime_v1_meta_ddl_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
-var file_greptime_v1_meta_ddl_proto_msgTypes = make([]protoimpl.MessageInfo, 6)
+var file_greptime_v1_meta_ddl_proto_msgTypes = make([]protoimpl.MessageInfo, 9)
 var file_greptime_v1_meta_ddl_proto_goTypes = []interface{}{
 	(DdlTaskType)(0),              // 0: greptime.v1.meta.DdlTaskType
 	(*CreateTableTask)(nil),       // 1: greptime.v1.meta.CreateTableTask
-	(*DropTableTask)(nil),         // 2: greptime.v1.meta.DropTableTask
+	(*CreateTableTasks)(nil),      // 2: greptime.v1.meta.CreateTableTasks
-	(*AlterTableTask)(nil),        // 3: greptime.v1.meta.AlterTableTask
+	(*DropTableTask)(nil),         // 3: greptime.v1.meta.DropTableTask
-	(*TruncateTableTask)(nil),     // 4: greptime.v1.meta.TruncateTableTask
+	(*DropTableTasks)(nil),        // 4: greptime.v1.meta.DropTableTasks
-	(*SubmitDdlTaskRequest)(nil),  // 5: greptime.v1.meta.SubmitDdlTaskRequest
+	(*AlterTableTask)(nil),        // 5: greptime.v1.meta.AlterTableTask
-	(*SubmitDdlTaskResponse)(nil), // 6: greptime.v1.meta.SubmitDdlTaskResponse
+	(*AlterTableTasks)(nil),       // 6: greptime.v1.meta.AlterTableTasks
-	(*v1.CreateTableExpr)(nil),    // 7: greptime.v1.CreateTableExpr
+	(*TruncateTableTask)(nil),     // 7: greptime.v1.meta.TruncateTableTask
-	(*Partition)(nil),             // 8: greptime.v1.meta.Partition
+	(*SubmitDdlTaskRequest)(nil),  // 8: greptime.v1.meta.SubmitDdlTaskRequest
-	(*v1.DropTableExpr)(nil),      // 9: greptime.v1.DropTableExpr
+	(*SubmitDdlTaskResponse)(nil), // 9: greptime.v1.meta.SubmitDdlTaskResponse
-	(*v1.AlterExpr)(nil),          // 10: greptime.v1.AlterExpr
+	(*v1.CreateTableExpr)(nil),    // 10: greptime.v1.CreateTableExpr
-	(*v1.TruncateTableExpr)(nil),  // 11: greptime.v1.TruncateTableExpr
+	(*Partition)(nil),             // 11: greptime.v1.meta.Partition
-	(*RequestHeader)(nil),         // 12: greptime.v1.meta.RequestHeader
+	(*v1.DropTableExpr)(nil),      // 12: greptime.v1.DropTableExpr
-	(*ResponseHeader)(nil),        // 13: greptime.v1.meta.ResponseHeader
+	(*v1.AlterExpr)(nil),          // 13: greptime.v1.AlterExpr
-	(*TableId)(nil),               // 14: greptime.v1.meta.TableId
+	(*v1.TruncateTableExpr)(nil),  // 14: greptime.v1.TruncateTableExpr
+	(*RequestHeader)(nil),         // 15: greptime.v1.meta.RequestHeader
+	(*ResponseHeader)(nil),        // 16: greptime.v1.meta.ResponseHeader
+	(*TableId)(nil),               // 17: greptime.v1.meta.TableId
 }
 var file_greptime_v1_meta_ddl_proto_depIdxs = []int32{
-	7,  // 0: greptime.v1.meta.CreateTableTask.create_table:type_name -> greptime.v1.CreateTableExpr
+	10, // 0: greptime.v1.meta.CreateTableTask.create_table:type_name -> greptime.v1.CreateTableExpr
-	8,  // 1: greptime.v1.meta.CreateTableTask.partitions:type_name -> greptime.v1.meta.Partition
+	11, // 1: greptime.v1.meta.CreateTableTask.partitions:type_name -> greptime.v1.meta.Partition
-	9,  // 2: greptime.v1.meta.DropTableTask.drop_table:type_name -> greptime.v1.DropTableExpr
+	1,  // 2: greptime.v1.meta.CreateTableTasks.tasks:type_name -> greptime.v1.meta.CreateTableTask
-	10, // 3: greptime.v1.meta.AlterTableTask.alter_table:type_name -> greptime.v1.AlterExpr
+	12, // 3: greptime.v1.meta.DropTableTask.drop_table:type_name -> greptime.v1.DropTableExpr
-	11, // 4: greptime.v1.meta.TruncateTableTask.truncate_table:type_name -> greptime.v1.TruncateTableExpr
+	3,  // 4: greptime.v1.meta.DropTableTasks.tasks:type_name -> greptime.v1.meta.DropTableTask
-	12, // 5: greptime.v1.meta.SubmitDdlTaskRequest.header:type_name -> greptime.v1.meta.RequestHeader
+	13, // 5: greptime.v1.meta.AlterTableTask.alter_table:type_name -> greptime.v1.AlterExpr
-	1,  // 6: greptime.v1.meta.SubmitDdlTaskRequest.create_table_task:type_name -> greptime.v1.meta.CreateTableTask
+	5,  // 6: greptime.v1.meta.AlterTableTasks.tasks:type_name -> greptime.v1.meta.AlterTableTask
-	2,  // 7: greptime.v1.meta.SubmitDdlTaskRequest.drop_table_task:type_name -> greptime.v1.meta.DropTableTask
+	14, // 7: greptime.v1.meta.TruncateTableTask.truncate_table:type_name -> greptime.v1.TruncateTableExpr
-	3,  // 8: greptime.v1.meta.SubmitDdlTaskRequest.alter_table_task:type_name -> greptime.v1.meta.AlterTableTask
+	15, // 8: greptime.v1.meta.SubmitDdlTaskRequest.header:type_name -> greptime.v1.meta.RequestHeader
-	4,  // 9: greptime.v1.meta.SubmitDdlTaskRequest.truncate_table_task:type_name -> greptime.v1.meta.TruncateTableTask
+	1,  // 9: greptime.v1.meta.SubmitDdlTaskRequest.create_table_task:type_name -> greptime.v1.meta.CreateTableTask
-	13, // 10: greptime.v1.meta.SubmitDdlTaskResponse.header:type_name -> greptime.v1.meta.ResponseHeader
+	3,  // 10: greptime.v1.meta.SubmitDdlTaskRequest.drop_table_task:type_name -> greptime.v1.meta.DropTableTask
-	14, // 11: greptime.v1.meta.SubmitDdlTaskResponse.table_id:type_name -> greptime.v1.meta.TableId
+	5,  // 11: greptime.v1.meta.SubmitDdlTaskRequest.alter_table_task:type_name -> greptime.v1.meta.AlterTableTask
-	5,  // 12: greptime.v1.meta.DdlTask.SubmitDdlTask:input_type -> greptime.v1.meta.SubmitDdlTaskRequest
+	7,  // 12: greptime.v1.meta.SubmitDdlTaskRequest.truncate_table_task:type_name -> greptime.v1.meta.TruncateTableTask
-	6,  // 13: greptime.v1.meta.DdlTask.SubmitDdlTask:output_type -> greptime.v1.meta.SubmitDdlTaskResponse
+	2,  // 13: greptime.v1.meta.SubmitDdlTaskRequest.create_table_tasks:type_name -> greptime.v1.meta.CreateTableTasks
-	13, // [13:14] is the sub-list for method output_type
+	4,  // 14: greptime.v1.meta.SubmitDdlTaskRequest.drop_table_tasks:type_name -> greptime.v1.meta.DropTableTasks
-	12, // [12:13] is the sub-list for method input_type
+	6,  // 15: greptime.v1.meta.SubmitDdlTaskRequest.alter_table_tasks:type_name -> greptime.v1.meta.AlterTableTasks
-	12, // [12:12] is the sub-list for extension type_name
+	16, // 16: greptime.v1.meta.SubmitDdlTaskResponse.header:type_name -> greptime.v1.meta.ResponseHeader
-	12, // [12:12] is the sub-list for extension extendee
+	17, // 17: greptime.v1.meta.SubmitDdlTaskResponse.table_id:type_name -> greptime.v1.meta.TableId
-	0,  // [0:12] is the sub-list for field type_name
+	17, // 18: greptime.v1.meta.SubmitDdlTaskResponse.table_ids:type_name -> greptime.v1.meta.TableId
+	8,  // 19: greptime.v1.meta.DdlTask.SubmitDdlTask:input_type -> greptime.v1.meta.SubmitDdlTaskRequest
+	9,  // 20: greptime.v1.meta.DdlTask.SubmitDdlTask:output_type -> greptime.v1.meta.SubmitDdlTaskResponse
+	20, // [20:21] is the sub-list for method output_type
+	19, // [19:20] is the sub-list for method input_type
+	19, // [19:19] is the sub-list for extension type_name
+	19, // [19:19] is the sub-list for extension extendee
+	0,  // [0:19] is the sub-list for field type_name
 }
 
 func init() { file_greptime_v1_meta_ddl_proto_init() }
@@ -630,7 +866,7 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_meta_ddl_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DropTableTask); i {
+			switch v := v.(*CreateTableTasks); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -642,7 +878,7 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_meta_ddl_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*AlterTableTask); i {
+			switch v := v.(*DropTableTask); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -654,7 +890,7 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_meta_ddl_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*TruncateTableTask); i {
+			switch v := v.(*DropTableTasks); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -666,7 +902,7 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_meta_ddl_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*SubmitDdlTaskRequest); i {
+			switch v := v.(*AlterTableTask); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -678,6 +914,42 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_meta_ddl_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*AlterTableTasks); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_greptime_v1_meta_ddl_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*TruncateTableTask); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_greptime_v1_meta_ddl_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*SubmitDdlTaskRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_greptime_v1_meta_ddl_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*SubmitDdlTaskResponse); i {
 			case 0:
 				return &v.state
@@ -690,11 +962,14 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			}
 		}
 	}
-	file_greptime_v1_meta_ddl_proto_msgTypes[4].OneofWrappers = []interface{}{
+	file_greptime_v1_meta_ddl_proto_msgTypes[7].OneofWrappers = []interface{}{
 		(*SubmitDdlTaskRequest_CreateTableTask)(nil),
 		(*SubmitDdlTaskRequest_DropTableTask)(nil),
 		(*SubmitDdlTaskRequest_AlterTableTask)(nil),
 		(*SubmitDdlTaskRequest_TruncateTableTask)(nil),
+		(*SubmitDdlTaskRequest_CreateTableTasks)(nil),
+		(*SubmitDdlTaskRequest_DropTableTasks)(nil),
+		(*SubmitDdlTaskRequest_AlterTableTasks)(nil),
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
@@ -702,7 +977,7 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_greptime_v1_meta_ddl_proto_rawDesc,
 			NumEnums:      1,
-			NumMessages:   6,
+			NumMessages:   9,
 			NumExtensions: 0,
 			NumServices:   1,
 		},

proto/greptime/v1/meta/ddl.proto

@@ -39,14 +39,20 @@ message CreateTableTask {
     bytes table_info = 3;
 }
 
+message CreateTableTasks { repeated CreateTableTask tasks = 1; }
+
 message DropTableTask{
     DropTableExpr drop_table = 1;
 }
 
+message DropTableTasks { repeated DropTableTask tasks = 1; }
+
 message AlterTableTask{
     AlterExpr alter_table = 1;
 }
 
+message AlterTableTasks { repeated AlterTableTask tasks = 1; }
+
 message TruncateTableTask {
     TruncateTableExpr truncate_table = 1;
 }
@@ -59,6 +65,9 @@ message SubmitDdlTaskRequest {
         DropTableTask drop_table_task = 3;
         AlterTableTask alter_table_task = 4;
         TruncateTableTask truncate_table_task = 5;
+        CreateTableTasks create_table_tasks = 6;
+        DropTableTasks drop_table_tasks = 7;
+        AlterTableTasks alter_table_tasks = 8;
      }
 }
 
@@ -68,5 +77,8 @@ message SubmitDdlTaskResponse {
     bytes key = 2;
 
     // Returns if table created.
+    // TODO(jeremy): remove it?
     TableId table_id = 4;
+    // Returns if the tables created.
+    repeated TableId table_ids = 5;
 }

proto/greptime/v1/region/server.proto

@@ -47,6 +47,9 @@ message RegionRequest {
     FlushRequest flush = 10;
     CompactRequest compact = 11;
     TruncateRequest truncate = 12;
+    CreateRequests creates = 13;
+    DropRequests drops = 14;
+    AlterRequests alters = 15;
   }
 }
 
@@ -76,6 +79,11 @@ message QueryRequest {
   bytes plan = 3;
 }
 
+// Create a batch of regions at once, usually used to create multiple logical regions
+// at once. Different engines can choose whether to support this request.
+// Metric Engine needs it.
+message CreateRequests { repeated CreateRequest requests = 1; }
+
 message CreateRequest {
   uint64 region_id = 1;
   // Region engine name
@@ -91,6 +99,9 @@ message CreateRequest {
   // TODO: add partition def
 }
 
+// Same as CreateRequests, but for dropping regions.
+message DropRequests { repeated DropRequest requests = 1; }
+
 message DropRequest { uint64 region_id = 1; }
 
 message OpenRequest {
@@ -105,6 +116,8 @@ message OpenRequest {
 
 message CloseRequest { uint64 region_id = 1; }
 
+message AlterRequests { repeated AlterRequest requests = 1; }
+
 message AlterRequest {
   uint64 region_id = 1;
   oneof kind {