feat: add Create/Remove Task request (#150)

* feat: add Create/Remove Task request

* chore: all supported impls

* feat: flow.server.proto

* feat: add affected task ids

* chore: make all

* chore: typo

* refactor: use u32 for `TaskId`

c++/greptime/v1/flow/server.grpc.pb.cc

@@ -0,0 +1,132 @@
+// Generated by the gRPC C++ plugin.
+// If you make any local change, they will be lost.
+// source: greptime/v1/flow/server.proto
+
+#include "greptime/v1/flow/server.pb.h"
+#include "greptime/v1/flow/server.grpc.pb.h"
+
+#include <functional>
+#include <grpcpp/support/async_stream.h>
+#include <grpcpp/support/async_unary_call.h>
+#include <grpcpp/impl/channel_interface.h>
+#include <grpcpp/impl/client_unary_call.h>
+#include <grpcpp/support/client_callback.h>
+#include <grpcpp/support/message_allocator.h>
+#include <grpcpp/support/method_handler.h>
+#include <grpcpp/impl/rpc_service_method.h>
+#include <grpcpp/support/server_callback.h>
+#include <grpcpp/impl/codegen/server_callback_handlers.h>
+#include <grpcpp/server_context.h>
+#include <grpcpp/impl/service_type.h>
+#include <grpcpp/support/sync_stream.h>
+namespace greptime {
+namespace v1 {
+namespace flow {
+
+static const char* Flow_method_names[] = {
+  "/greptime.v1.flow.Flow/HandleCreateRemove",
+  "/greptime.v1.flow.Flow/HandleMirrorRequest",
+};
+
+std::unique_ptr< Flow::Stub> Flow::NewStub(const std::shared_ptr< ::grpc::ChannelInterface>& channel, const ::grpc::StubOptions& options) {
+  (void)options;
+  std::unique_ptr< Flow::Stub> stub(new Flow::Stub(channel, options));
+  return stub;
+}
+
+Flow::Stub::Stub(const std::shared_ptr< ::grpc::ChannelInterface>& channel, const ::grpc::StubOptions& options)
+  : channel_(channel), rpcmethod_HandleCreateRemove_(Flow_method_names[0], options.suffix_for_stats(),::grpc::internal::RpcMethod::NORMAL_RPC, channel)
+  , rpcmethod_HandleMirrorRequest_(Flow_method_names[1], options.suffix_for_stats(),::grpc::internal::RpcMethod::NORMAL_RPC, channel)
+  {}
+
+::grpc::Status Flow::Stub::HandleCreateRemove(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest& request, ::greptime::v1::flow::FlowResponse* response) {
+  return ::grpc::internal::BlockingUnaryCall< ::greptime::v1::flow::FlowRequest, ::greptime::v1::flow::FlowResponse, ::grpc::protobuf::MessageLite, ::grpc::protobuf::MessageLite>(channel_.get(), rpcmethod_HandleCreateRemove_, context, request, response);
+}
+
+void Flow::Stub::async::HandleCreateRemove(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest* request, ::greptime::v1::flow::FlowResponse* response, std::function<void(::grpc::Status)> f) {
+  ::grpc::internal::CallbackUnaryCall< ::greptime::v1::flow::FlowRequest, ::greptime::v1::flow::FlowResponse, ::grpc::protobuf::MessageLite, ::grpc::protobuf::MessageLite>(stub_->channel_.get(), stub_->rpcmethod_HandleCreateRemove_, context, request, response, std::move(f));
+}
+
+void Flow::Stub::async::HandleCreateRemove(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest* request, ::greptime::v1::flow::FlowResponse* response, ::grpc::ClientUnaryReactor* reactor) {
+  ::grpc::internal::ClientCallbackUnaryFactory::Create< ::grpc::protobuf::MessageLite, ::grpc::protobuf::MessageLite>(stub_->channel_.get(), stub_->rpcmethod_HandleCreateRemove_, context, request, response, reactor);
+}
+
+::grpc::ClientAsyncResponseReader< ::greptime::v1::flow::FlowResponse>* Flow::Stub::PrepareAsyncHandleCreateRemoveRaw(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest& request, ::grpc::CompletionQueue* cq) {
+  return ::grpc::internal::ClientAsyncResponseReaderHelper::Create< ::greptime::v1::flow::FlowResponse, ::greptime::v1::flow::FlowRequest, ::grpc::protobuf::MessageLite, ::grpc::protobuf::MessageLite>(channel_.get(), cq, rpcmethod_HandleCreateRemove_, context, request);
+}
+
+::grpc::ClientAsyncResponseReader< ::greptime::v1::flow::FlowResponse>* Flow::Stub::AsyncHandleCreateRemoveRaw(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest& request, ::grpc::CompletionQueue* cq) {
+  auto* result =
+    this->PrepareAsyncHandleCreateRemoveRaw(context, request, cq);
+  result->StartCall();
+  return result;
+}
+
+::grpc::Status Flow::Stub::HandleMirrorRequest(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests& request, ::greptime::v1::flow::FlowResponse* response) {
+  return ::grpc::internal::BlockingUnaryCall< ::greptime::v1::flow::InsertRequests, ::greptime::v1::flow::FlowResponse, ::grpc::protobuf::MessageLite, ::grpc::protobuf::MessageLite>(channel_.get(), rpcmethod_HandleMirrorRequest_, context, request, response);
+}
+
+void Flow::Stub::async::HandleMirrorRequest(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests* request, ::greptime::v1::flow::FlowResponse* response, std::function<void(::grpc::Status)> f) {
+  ::grpc::internal::CallbackUnaryCall< ::greptime::v1::flow::InsertRequests, ::greptime::v1::flow::FlowResponse, ::grpc::protobuf::MessageLite, ::grpc::protobuf::MessageLite>(stub_->channel_.get(), stub_->rpcmethod_HandleMirrorRequest_, context, request, response, std::move(f));
+}
+
+void Flow::Stub::async::HandleMirrorRequest(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests* request, ::greptime::v1::flow::FlowResponse* response, ::grpc::ClientUnaryReactor* reactor) {
+  ::grpc::internal::ClientCallbackUnaryFactory::Create< ::grpc::protobuf::MessageLite, ::grpc::protobuf::MessageLite>(stub_->channel_.get(), stub_->rpcmethod_HandleMirrorRequest_, context, request, response, reactor);
+}
+
+::grpc::ClientAsyncResponseReader< ::greptime::v1::flow::FlowResponse>* Flow::Stub::PrepareAsyncHandleMirrorRequestRaw(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests& request, ::grpc::CompletionQueue* cq) {
+  return ::grpc::internal::ClientAsyncResponseReaderHelper::Create< ::greptime::v1::flow::FlowResponse, ::greptime::v1::flow::InsertRequests, ::grpc::protobuf::MessageLite, ::grpc::protobuf::MessageLite>(channel_.get(), cq, rpcmethod_HandleMirrorRequest_, context, request);
+}
+
+::grpc::ClientAsyncResponseReader< ::greptime::v1::flow::FlowResponse>* Flow::Stub::AsyncHandleMirrorRequestRaw(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests& request, ::grpc::CompletionQueue* cq) {
+  auto* result =
+    this->PrepareAsyncHandleMirrorRequestRaw(context, request, cq);
+  result->StartCall();
+  return result;
+}
+
+Flow::Service::Service() {
+  AddMethod(new ::grpc::internal::RpcServiceMethod(
+      Flow_method_names[0],
+      ::grpc::internal::RpcMethod::NORMAL_RPC,
+      new ::grpc::internal::RpcMethodHandler< Flow::Service, ::greptime::v1::flow::FlowRequest, ::greptime::v1::flow::FlowResponse, ::grpc::protobuf::MessageLite, ::grpc::protobuf::MessageLite>(
+          [](Flow::Service* service,
+             ::grpc::ServerContext* ctx,
+             const ::greptime::v1::flow::FlowRequest* req,
+             ::greptime::v1::flow::FlowResponse* resp) {
+               return service->HandleCreateRemove(ctx, req, resp);
+             }, this)));
+  AddMethod(new ::grpc::internal::RpcServiceMethod(
+      Flow_method_names[1],
+      ::grpc::internal::RpcMethod::NORMAL_RPC,
+      new ::grpc::internal::RpcMethodHandler< Flow::Service, ::greptime::v1::flow::InsertRequests, ::greptime::v1::flow::FlowResponse, ::grpc::protobuf::MessageLite, ::grpc::protobuf::MessageLite>(
+          [](Flow::Service* service,
+             ::grpc::ServerContext* ctx,
+             const ::greptime::v1::flow::InsertRequests* req,
+             ::greptime::v1::flow::FlowResponse* resp) {
+               return service->HandleMirrorRequest(ctx, req, resp);
+             }, this)));
+}
+
+Flow::Service::~Service() {
+}
+
+::grpc::Status Flow::Service::HandleCreateRemove(::grpc::ServerContext* context, const ::greptime::v1::flow::FlowRequest* request, ::greptime::v1::flow::FlowResponse* response) {
+  (void) context;
+  (void) request;
+  (void) response;
+  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, "");
+}
+
+::grpc::Status Flow::Service::HandleMirrorRequest(::grpc::ServerContext* context, const ::greptime::v1::flow::InsertRequests* request, ::greptime::v1::flow::FlowResponse* response) {
+  (void) context;
+  (void) request;
+  (void) response;
+  return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, "");
+}
+
+
+}  // namespace greptime
+}  // namespace v1
+}  // namespace flow
+

c++/greptime/v1/flow/server.grpc.pb.h

@@ -0,0 +1,428 @@
+// Generated by the gRPC C++ plugin.
+// If you make any local change, they will be lost.
+// source: greptime/v1/flow/server.proto
+// Original file comments:
+// Copyright 2023 Greptime Team
+//
+// 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,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+#ifndef GRPC_greptime_2fv1_2fflow_2fserver_2eproto__INCLUDED
+#define GRPC_greptime_2fv1_2fflow_2fserver_2eproto__INCLUDED
+
+#include "greptime/v1/flow/server.pb.h"
+
+#include <functional>
+#include <grpcpp/generic/async_generic_service.h>
+#include <grpcpp/support/async_stream.h>
+#include <grpcpp/support/async_unary_call.h>
+#include <grpcpp/support/client_callback.h>
+#include <grpcpp/client_context.h>
+#include <grpcpp/completion_queue.h>
+#include <grpcpp/support/message_allocator.h>
+#include <grpcpp/support/method_handler.h>
+#include <grpcpp/impl/codegen/proto_utils.h>
+#include <grpcpp/impl/rpc_method.h>
+#include <grpcpp/support/server_callback.h>
+#include <grpcpp/impl/codegen/server_callback_handlers.h>
+#include <grpcpp/server_context.h>
+#include <grpcpp/impl/service_type.h>
+#include <grpcpp/impl/codegen/status.h>
+#include <grpcpp/support/stub_options.h>
+#include <grpcpp/support/sync_stream.h>
+
+namespace greptime {
+namespace v1 {
+namespace flow {
+
+class Flow final {
+ public:
+  static constexpr char const* service_full_name() {
+    return "greptime.v1.flow.Flow";
+  }
+  class StubInterface {
+   public:
+    virtual ~StubInterface() {}
+    // Handle the control plane request for creating or removing a flow.
+    virtual ::grpc::Status HandleCreateRemove(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest& request, ::greptime::v1::flow::FlowResponse* response) = 0;
+    std::unique_ptr< ::grpc::ClientAsyncResponseReaderInterface< ::greptime::v1::flow::FlowResponse>> AsyncHandleCreateRemove(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest& request, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncResponseReaderInterface< ::greptime::v1::flow::FlowResponse>>(AsyncHandleCreateRemoveRaw(context, request, cq));
+    }
+    std::unique_ptr< ::grpc::ClientAsyncResponseReaderInterface< ::greptime::v1::flow::FlowResponse>> PrepareAsyncHandleCreateRemove(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest& request, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncResponseReaderInterface< ::greptime::v1::flow::FlowResponse>>(PrepareAsyncHandleCreateRemoveRaw(context, request, cq));
+    }
+    // Handle the data plane request for inserting or deleting rows
+    // only expect `RegionRequest` to be one of `InsertRequests` or
+    // `DeleteRequests` other types of `RegionRequest` will be ignored
+    virtual ::grpc::Status HandleMirrorRequest(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests& request, ::greptime::v1::flow::FlowResponse* response) = 0;
+    std::unique_ptr< ::grpc::ClientAsyncResponseReaderInterface< ::greptime::v1::flow::FlowResponse>> AsyncHandleMirrorRequest(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests& request, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncResponseReaderInterface< ::greptime::v1::flow::FlowResponse>>(AsyncHandleMirrorRequestRaw(context, request, cq));
+    }
+    std::unique_ptr< ::grpc::ClientAsyncResponseReaderInterface< ::greptime::v1::flow::FlowResponse>> PrepareAsyncHandleMirrorRequest(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests& request, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncResponseReaderInterface< ::greptime::v1::flow::FlowResponse>>(PrepareAsyncHandleMirrorRequestRaw(context, request, cq));
+    }
+    class async_interface {
+     public:
+      virtual ~async_interface() {}
+      // Handle the control plane request for creating or removing a flow.
+      virtual void HandleCreateRemove(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest* request, ::greptime::v1::flow::FlowResponse* response, std::function<void(::grpc::Status)>) = 0;
+      virtual void HandleCreateRemove(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest* request, ::greptime::v1::flow::FlowResponse* response, ::grpc::ClientUnaryReactor* reactor) = 0;
+      // Handle the data plane request for inserting or deleting rows
+      // only expect `RegionRequest` to be one of `InsertRequests` or
+      // `DeleteRequests` other types of `RegionRequest` will be ignored
+      virtual void HandleMirrorRequest(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests* request, ::greptime::v1::flow::FlowResponse* response, std::function<void(::grpc::Status)>) = 0;
+      virtual void HandleMirrorRequest(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests* request, ::greptime::v1::flow::FlowResponse* response, ::grpc::ClientUnaryReactor* reactor) = 0;
+    };
+    typedef class async_interface experimental_async_interface;
+    virtual class async_interface* async() { return nullptr; }
+    class async_interface* experimental_async() { return async(); }
+   private:
+    virtual ::grpc::ClientAsyncResponseReaderInterface< ::greptime::v1::flow::FlowResponse>* AsyncHandleCreateRemoveRaw(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest& request, ::grpc::CompletionQueue* cq) = 0;
+    virtual ::grpc::ClientAsyncResponseReaderInterface< ::greptime::v1::flow::FlowResponse>* PrepareAsyncHandleCreateRemoveRaw(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest& request, ::grpc::CompletionQueue* cq) = 0;
+    virtual ::grpc::ClientAsyncResponseReaderInterface< ::greptime::v1::flow::FlowResponse>* AsyncHandleMirrorRequestRaw(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests& request, ::grpc::CompletionQueue* cq) = 0;
+    virtual ::grpc::ClientAsyncResponseReaderInterface< ::greptime::v1::flow::FlowResponse>* PrepareAsyncHandleMirrorRequestRaw(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests& request, ::grpc::CompletionQueue* cq) = 0;
+  };
+  class Stub final : public StubInterface {
+   public:
+    Stub(const std::shared_ptr< ::grpc::ChannelInterface>& channel, const ::grpc::StubOptions& options = ::grpc::StubOptions());
+    ::grpc::Status HandleCreateRemove(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest& request, ::greptime::v1::flow::FlowResponse* response) override;
+    std::unique_ptr< ::grpc::ClientAsyncResponseReader< ::greptime::v1::flow::FlowResponse>> AsyncHandleCreateRemove(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest& request, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncResponseReader< ::greptime::v1::flow::FlowResponse>>(AsyncHandleCreateRemoveRaw(context, request, cq));
+    }
+    std::unique_ptr< ::grpc::ClientAsyncResponseReader< ::greptime::v1::flow::FlowResponse>> PrepareAsyncHandleCreateRemove(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest& request, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncResponseReader< ::greptime::v1::flow::FlowResponse>>(PrepareAsyncHandleCreateRemoveRaw(context, request, cq));
+    }
+    ::grpc::Status HandleMirrorRequest(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests& request, ::greptime::v1::flow::FlowResponse* response) override;
+    std::unique_ptr< ::grpc::ClientAsyncResponseReader< ::greptime::v1::flow::FlowResponse>> AsyncHandleMirrorRequest(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests& request, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncResponseReader< ::greptime::v1::flow::FlowResponse>>(AsyncHandleMirrorRequestRaw(context, request, cq));
+    }
+    std::unique_ptr< ::grpc::ClientAsyncResponseReader< ::greptime::v1::flow::FlowResponse>> PrepareAsyncHandleMirrorRequest(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests& request, ::grpc::CompletionQueue* cq) {
+      return std::unique_ptr< ::grpc::ClientAsyncResponseReader< ::greptime::v1::flow::FlowResponse>>(PrepareAsyncHandleMirrorRequestRaw(context, request, cq));
+    }
+    class async final :
+      public StubInterface::async_interface {
+     public:
+      void HandleCreateRemove(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest* request, ::greptime::v1::flow::FlowResponse* response, std::function<void(::grpc::Status)>) override;
+      void HandleCreateRemove(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest* request, ::greptime::v1::flow::FlowResponse* response, ::grpc::ClientUnaryReactor* reactor) override;
+      void HandleMirrorRequest(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests* request, ::greptime::v1::flow::FlowResponse* response, std::function<void(::grpc::Status)>) override;
+      void HandleMirrorRequest(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests* request, ::greptime::v1::flow::FlowResponse* response, ::grpc::ClientUnaryReactor* reactor) override;
+     private:
+      friend class Stub;
+      explicit async(Stub* stub): stub_(stub) { }
+      Stub* stub() { return stub_; }
+      Stub* stub_;
+    };
+    class async* async() override { return &async_stub_; }
+
+   private:
+    std::shared_ptr< ::grpc::ChannelInterface> channel_;
+    class async async_stub_{this};
+    ::grpc::ClientAsyncResponseReader< ::greptime::v1::flow::FlowResponse>* AsyncHandleCreateRemoveRaw(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest& request, ::grpc::CompletionQueue* cq) override;
+    ::grpc::ClientAsyncResponseReader< ::greptime::v1::flow::FlowResponse>* PrepareAsyncHandleCreateRemoveRaw(::grpc::ClientContext* context, const ::greptime::v1::flow::FlowRequest& request, ::grpc::CompletionQueue* cq) override;
+    ::grpc::ClientAsyncResponseReader< ::greptime::v1::flow::FlowResponse>* AsyncHandleMirrorRequestRaw(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests& request, ::grpc::CompletionQueue* cq) override;
+    ::grpc::ClientAsyncResponseReader< ::greptime::v1::flow::FlowResponse>* PrepareAsyncHandleMirrorRequestRaw(::grpc::ClientContext* context, const ::greptime::v1::flow::InsertRequests& request, ::grpc::CompletionQueue* cq) override;
+    const ::grpc::internal::RpcMethod rpcmethod_HandleCreateRemove_;
+    const ::grpc::internal::RpcMethod rpcmethod_HandleMirrorRequest_;
+  };
+  static std::unique_ptr<Stub> NewStub(const std::shared_ptr< ::grpc::ChannelInterface>& channel, const ::grpc::StubOptions& options = ::grpc::StubOptions());
+
+  class Service : public ::grpc::Service {
+   public:
+    Service();
+    virtual ~Service();
+    // Handle the control plane request for creating or removing a flow.
+    virtual ::grpc::Status HandleCreateRemove(::grpc::ServerContext* context, const ::greptime::v1::flow::FlowRequest* request, ::greptime::v1::flow::FlowResponse* response);
+    // Handle the data plane request for inserting or deleting rows
+    // only expect `RegionRequest` to be one of `InsertRequests` or
+    // `DeleteRequests` other types of `RegionRequest` will be ignored
+    virtual ::grpc::Status HandleMirrorRequest(::grpc::ServerContext* context, const ::greptime::v1::flow::InsertRequests* request, ::greptime::v1::flow::FlowResponse* response);
+  };
+  template <class BaseClass>
+  class WithAsyncMethod_HandleCreateRemove : public BaseClass {
+   private:
+    void BaseClassMustBeDerivedFromService(const Service* /*service*/) {}
+   public:
+    WithAsyncMethod_HandleCreateRemove() {
+      ::grpc::Service::MarkMethodAsync(0);
+    }
+    ~WithAsyncMethod_HandleCreateRemove() override {
+      BaseClassMustBeDerivedFromService(this);
+    }
+    // disable synchronous version of this method
+    ::grpc::Status HandleCreateRemove(::grpc::ServerContext* /*context*/, const ::greptime::v1::flow::FlowRequest* /*request*/, ::greptime::v1::flow::FlowResponse* /*response*/) override {
+      abort();
+      return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, "");
+    }
+    void RequestHandleCreateRemove(::grpc::ServerContext* context, ::greptime::v1::flow::FlowRequest* request, ::grpc::ServerAsyncResponseWriter< ::greptime::v1::flow::FlowResponse>* response, ::grpc::CompletionQueue* new_call_cq, ::grpc::ServerCompletionQueue* notification_cq, void *tag) {
+      ::grpc::Service::RequestAsyncUnary(0, context, request, response, new_call_cq, notification_cq, tag);
+    }
+  };
+  template <class BaseClass>
+  class WithAsyncMethod_HandleMirrorRequest : public BaseClass {
+   private:
+    void BaseClassMustBeDerivedFromService(const Service* /*service*/) {}
+   public:
+    WithAsyncMethod_HandleMirrorRequest() {
+      ::grpc::Service::MarkMethodAsync(1);
+    }
+    ~WithAsyncMethod_HandleMirrorRequest() override {
+      BaseClassMustBeDerivedFromService(this);
+    }
+    // disable synchronous version of this method
+    ::grpc::Status HandleMirrorRequest(::grpc::ServerContext* /*context*/, const ::greptime::v1::flow::InsertRequests* /*request*/, ::greptime::v1::flow::FlowResponse* /*response*/) override {
+      abort();
+      return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, "");
+    }
+    void RequestHandleMirrorRequest(::grpc::ServerContext* context, ::greptime::v1::flow::InsertRequests* request, ::grpc::ServerAsyncResponseWriter< ::greptime::v1::flow::FlowResponse>* response, ::grpc::CompletionQueue* new_call_cq, ::grpc::ServerCompletionQueue* notification_cq, void *tag) {
+      ::grpc::Service::RequestAsyncUnary(1, context, request, response, new_call_cq, notification_cq, tag);
+    }
+  };
+  typedef WithAsyncMethod_HandleCreateRemove<WithAsyncMethod_HandleMirrorRequest<Service > > AsyncService;
+  template <class BaseClass>
+  class WithCallbackMethod_HandleCreateRemove : public BaseClass {
+   private:
+    void BaseClassMustBeDerivedFromService(const Service* /*service*/) {}
+   public:
+    WithCallbackMethod_HandleCreateRemove() {
+      ::grpc::Service::MarkMethodCallback(0,
+          new ::grpc::internal::CallbackUnaryHandler< ::greptime::v1::flow::FlowRequest, ::greptime::v1::flow::FlowResponse>(
+            [this](
+                   ::grpc::CallbackServerContext* context, const ::greptime::v1::flow::FlowRequest* request, ::greptime::v1::flow::FlowResponse* response) { return this->HandleCreateRemove(context, request, response); }));}
+    void SetMessageAllocatorFor_HandleCreateRemove(
+        ::grpc::MessageAllocator< ::greptime::v1::flow::FlowRequest, ::greptime::v1::flow::FlowResponse>* allocator) {
+      ::grpc::internal::MethodHandler* const handler = ::grpc::Service::GetHandler(0);
+      static_cast<::grpc::internal::CallbackUnaryHandler< ::greptime::v1::flow::FlowRequest, ::greptime::v1::flow::FlowResponse>*>(handler)
+              ->SetMessageAllocator(allocator);
+    }
+    ~WithCallbackMethod_HandleCreateRemove() override {
+      BaseClassMustBeDerivedFromService(this);
+    }
+    // disable synchronous version of this method
+    ::grpc::Status HandleCreateRemove(::grpc::ServerContext* /*context*/, const ::greptime::v1::flow::FlowRequest* /*request*/, ::greptime::v1::flow::FlowResponse* /*response*/) override {
+      abort();
+      return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, "");
+    }
+    virtual ::grpc::ServerUnaryReactor* HandleCreateRemove(
+      ::grpc::CallbackServerContext* /*context*/, const ::greptime::v1::flow::FlowRequest* /*request*/, ::greptime::v1::flow::FlowResponse* /*response*/)  { return nullptr; }
+  };
+  template <class BaseClass>
+  class WithCallbackMethod_HandleMirrorRequest : public BaseClass {
+   private:
+    void BaseClassMustBeDerivedFromService(const Service* /*service*/) {}
+   public:
+    WithCallbackMethod_HandleMirrorRequest() {
+      ::grpc::Service::MarkMethodCallback(1,
+          new ::grpc::internal::CallbackUnaryHandler< ::greptime::v1::flow::InsertRequests, ::greptime::v1::flow::FlowResponse>(
+            [this](
+                   ::grpc::CallbackServerContext* context, const ::greptime::v1::flow::InsertRequests* request, ::greptime::v1::flow::FlowResponse* response) { return this->HandleMirrorRequest(context, request, response); }));}
+    void SetMessageAllocatorFor_HandleMirrorRequest(
+        ::grpc::MessageAllocator< ::greptime::v1::flow::InsertRequests, ::greptime::v1::flow::FlowResponse>* allocator) {
+      ::grpc::internal::MethodHandler* const handler = ::grpc::Service::GetHandler(1);
+      static_cast<::grpc::internal::CallbackUnaryHandler< ::greptime::v1::flow::InsertRequests, ::greptime::v1::flow::FlowResponse>*>(handler)
+              ->SetMessageAllocator(allocator);
+    }
+    ~WithCallbackMethod_HandleMirrorRequest() override {
+      BaseClassMustBeDerivedFromService(this);
+    }
+    // disable synchronous version of this method
+    ::grpc::Status HandleMirrorRequest(::grpc::ServerContext* /*context*/, const ::greptime::v1::flow::InsertRequests* /*request*/, ::greptime::v1::flow::FlowResponse* /*response*/) override {
+      abort();
+      return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, "");
+    }
+    virtual ::grpc::ServerUnaryReactor* HandleMirrorRequest(
+      ::grpc::CallbackServerContext* /*context*/, const ::greptime::v1::flow::InsertRequests* /*request*/, ::greptime::v1::flow::FlowResponse* /*response*/)  { return nullptr; }
+  };
+  typedef WithCallbackMethod_HandleCreateRemove<WithCallbackMethod_HandleMirrorRequest<Service > > CallbackService;
+  typedef CallbackService ExperimentalCallbackService;
+  template <class BaseClass>
+  class WithGenericMethod_HandleCreateRemove : public BaseClass {
+   private:
+    void BaseClassMustBeDerivedFromService(const Service* /*service*/) {}
+   public:
+    WithGenericMethod_HandleCreateRemove() {
+      ::grpc::Service::MarkMethodGeneric(0);
+    }
+    ~WithGenericMethod_HandleCreateRemove() override {
+      BaseClassMustBeDerivedFromService(this);
+    }
+    // disable synchronous version of this method
+    ::grpc::Status HandleCreateRemove(::grpc::ServerContext* /*context*/, const ::greptime::v1::flow::FlowRequest* /*request*/, ::greptime::v1::flow::FlowResponse* /*response*/) override {
+      abort();
+      return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, "");
+    }
+  };
+  template <class BaseClass>
+  class WithGenericMethod_HandleMirrorRequest : public BaseClass {
+   private:
+    void BaseClassMustBeDerivedFromService(const Service* /*service*/) {}
+   public:
+    WithGenericMethod_HandleMirrorRequest() {
+      ::grpc::Service::MarkMethodGeneric(1);
+    }
+    ~WithGenericMethod_HandleMirrorRequest() override {
+      BaseClassMustBeDerivedFromService(this);
+    }
+    // disable synchronous version of this method
+    ::grpc::Status HandleMirrorRequest(::grpc::ServerContext* /*context*/, const ::greptime::v1::flow::InsertRequests* /*request*/, ::greptime::v1::flow::FlowResponse* /*response*/) override {
+      abort();
+      return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, "");
+    }
+  };
+  template <class BaseClass>
+  class WithRawMethod_HandleCreateRemove : public BaseClass {
+   private:
+    void BaseClassMustBeDerivedFromService(const Service* /*service*/) {}
+   public:
+    WithRawMethod_HandleCreateRemove() {
+      ::grpc::Service::MarkMethodRaw(0);
+    }
+    ~WithRawMethod_HandleCreateRemove() override {
+      BaseClassMustBeDerivedFromService(this);
+    }
+    // disable synchronous version of this method
+    ::grpc::Status HandleCreateRemove(::grpc::ServerContext* /*context*/, const ::greptime::v1::flow::FlowRequest* /*request*/, ::greptime::v1::flow::FlowResponse* /*response*/) override {
+      abort();
+      return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, "");
+    }
+    void RequestHandleCreateRemove(::grpc::ServerContext* context, ::grpc::ByteBuffer* request, ::grpc::ServerAsyncResponseWriter< ::grpc::ByteBuffer>* response, ::grpc::CompletionQueue* new_call_cq, ::grpc::ServerCompletionQueue* notification_cq, void *tag) {
+      ::grpc::Service::RequestAsyncUnary(0, context, request, response, new_call_cq, notification_cq, tag);
+    }
+  };
+  template <class BaseClass>
+  class WithRawMethod_HandleMirrorRequest : public BaseClass {
+   private:
+    void BaseClassMustBeDerivedFromService(const Service* /*service*/) {}
+   public:
+    WithRawMethod_HandleMirrorRequest() {
+      ::grpc::Service::MarkMethodRaw(1);
+    }
+    ~WithRawMethod_HandleMirrorRequest() override {
+      BaseClassMustBeDerivedFromService(this);
+    }
+    // disable synchronous version of this method
+    ::grpc::Status HandleMirrorRequest(::grpc::ServerContext* /*context*/, const ::greptime::v1::flow::InsertRequests* /*request*/, ::greptime::v1::flow::FlowResponse* /*response*/) override {
+      abort();
+      return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, "");
+    }
+    void RequestHandleMirrorRequest(::grpc::ServerContext* context, ::grpc::ByteBuffer* request, ::grpc::ServerAsyncResponseWriter< ::grpc::ByteBuffer>* response, ::grpc::CompletionQueue* new_call_cq, ::grpc::ServerCompletionQueue* notification_cq, void *tag) {
+      ::grpc::Service::RequestAsyncUnary(1, context, request, response, new_call_cq, notification_cq, tag);
+    }
+  };
+  template <class BaseClass>
+  class WithRawCallbackMethod_HandleCreateRemove : public BaseClass {
+   private:
+    void BaseClassMustBeDerivedFromService(const Service* /*service*/) {}
+   public:
+    WithRawCallbackMethod_HandleCreateRemove() {
+      ::grpc::Service::MarkMethodRawCallback(0,
+          new ::grpc::internal::CallbackUnaryHandler< ::grpc::ByteBuffer, ::grpc::ByteBuffer>(
+            [this](
+                   ::grpc::CallbackServerContext* context, const ::grpc::ByteBuffer* request, ::grpc::ByteBuffer* response) { return this->HandleCreateRemove(context, request, response); }));
+    }
+    ~WithRawCallbackMethod_HandleCreateRemove() override {
+      BaseClassMustBeDerivedFromService(this);
+    }
+    // disable synchronous version of this method
+    ::grpc::Status HandleCreateRemove(::grpc::ServerContext* /*context*/, const ::greptime::v1::flow::FlowRequest* /*request*/, ::greptime::v1::flow::FlowResponse* /*response*/) override {
+      abort();
+      return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, "");
+    }
+    virtual ::grpc::ServerUnaryReactor* HandleCreateRemove(
+      ::grpc::CallbackServerContext* /*context*/, const ::grpc::ByteBuffer* /*request*/, ::grpc::ByteBuffer* /*response*/)  { return nullptr; }
+  };
+  template <class BaseClass>
+  class WithRawCallbackMethod_HandleMirrorRequest : public BaseClass {
+   private:
+    void BaseClassMustBeDerivedFromService(const Service* /*service*/) {}
+   public:
+    WithRawCallbackMethod_HandleMirrorRequest() {
+      ::grpc::Service::MarkMethodRawCallback(1,
+          new ::grpc::internal::CallbackUnaryHandler< ::grpc::ByteBuffer, ::grpc::ByteBuffer>(
+            [this](
+                   ::grpc::CallbackServerContext* context, const ::grpc::ByteBuffer* request, ::grpc::ByteBuffer* response) { return this->HandleMirrorRequest(context, request, response); }));
+    }
+    ~WithRawCallbackMethod_HandleMirrorRequest() override {
+      BaseClassMustBeDerivedFromService(this);
+    }
+    // disable synchronous version of this method
+    ::grpc::Status HandleMirrorRequest(::grpc::ServerContext* /*context*/, const ::greptime::v1::flow::InsertRequests* /*request*/, ::greptime::v1::flow::FlowResponse* /*response*/) override {
+      abort();
+      return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, "");
+    }
+    virtual ::grpc::ServerUnaryReactor* HandleMirrorRequest(
+      ::grpc::CallbackServerContext* /*context*/, const ::grpc::ByteBuffer* /*request*/, ::grpc::ByteBuffer* /*response*/)  { return nullptr; }
+  };
+  template <class BaseClass>
+  class WithStreamedUnaryMethod_HandleCreateRemove : public BaseClass {
+   private:
+    void BaseClassMustBeDerivedFromService(const Service* /*service*/) {}
+   public:
+    WithStreamedUnaryMethod_HandleCreateRemove() {
+      ::grpc::Service::MarkMethodStreamed(0,
+        new ::grpc::internal::StreamedUnaryHandler<
+          ::greptime::v1::flow::FlowRequest, ::greptime::v1::flow::FlowResponse>(
+            [this](::grpc::ServerContext* context,
+                   ::grpc::ServerUnaryStreamer<
+                     ::greptime::v1::flow::FlowRequest, ::greptime::v1::flow::FlowResponse>* streamer) {
+                       return this->StreamedHandleCreateRemove(context,
+                         streamer);
+                  }));
+    }
+    ~WithStreamedUnaryMethod_HandleCreateRemove() override {
+      BaseClassMustBeDerivedFromService(this);
+    }
+    // disable regular version of this method
+    ::grpc::Status HandleCreateRemove(::grpc::ServerContext* /*context*/, const ::greptime::v1::flow::FlowRequest* /*request*/, ::greptime::v1::flow::FlowResponse* /*response*/) override {
+      abort();
+      return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, "");
+    }
+    // replace default version of method with streamed unary
+    virtual ::grpc::Status StreamedHandleCreateRemove(::grpc::ServerContext* context, ::grpc::ServerUnaryStreamer< ::greptime::v1::flow::FlowRequest,::greptime::v1::flow::FlowResponse>* server_unary_streamer) = 0;
+  };
+  template <class BaseClass>
+  class WithStreamedUnaryMethod_HandleMirrorRequest : public BaseClass {
+   private:
+    void BaseClassMustBeDerivedFromService(const Service* /*service*/) {}
+   public:
+    WithStreamedUnaryMethod_HandleMirrorRequest() {
+      ::grpc::Service::MarkMethodStreamed(1,
+        new ::grpc::internal::StreamedUnaryHandler<
+          ::greptime::v1::flow::InsertRequests, ::greptime::v1::flow::FlowResponse>(
+            [this](::grpc::ServerContext* context,
+                   ::grpc::ServerUnaryStreamer<
+                     ::greptime::v1::flow::InsertRequests, ::greptime::v1::flow::FlowResponse>* streamer) {
+                       return this->StreamedHandleMirrorRequest(context,
+                         streamer);
+                  }));
+    }
+    ~WithStreamedUnaryMethod_HandleMirrorRequest() override {
+      BaseClassMustBeDerivedFromService(this);
+    }
+    // disable regular version of this method
+    ::grpc::Status HandleMirrorRequest(::grpc::ServerContext* /*context*/, const ::greptime::v1::flow::InsertRequests* /*request*/, ::greptime::v1::flow::FlowResponse* /*response*/) override {
+      abort();
+      return ::grpc::Status(::grpc::StatusCode::UNIMPLEMENTED, "");
+    }
+    // replace default version of method with streamed unary
+    virtual ::grpc::Status StreamedHandleMirrorRequest(::grpc::ServerContext* context, ::grpc::ServerUnaryStreamer< ::greptime::v1::flow::InsertRequests,::greptime::v1::flow::FlowResponse>* server_unary_streamer) = 0;
+  };
+  typedef WithStreamedUnaryMethod_HandleCreateRemove<WithStreamedUnaryMethod_HandleMirrorRequest<Service > > StreamedUnaryService;
+  typedef Service SplitStreamedService;
+  typedef WithStreamedUnaryMethod_HandleCreateRemove<WithStreamedUnaryMethod_HandleMirrorRequest<Service > > StreamedService;
+};
+
+}  // namespace flow
+}  // namespace v1
+}  // namespace greptime
+
+
+#endif  // GRPC_greptime_2fv1_2fflow_2fserver_2eproto__INCLUDED

c++/greptime/v1/region/server.pb.cc

@@ -38,6 +38,7 @@ PROTOBUF_CONSTEXPR RegionRequestHeader::RegionRequestHeader(
     ::_pbi::ConstantInitialized): _impl_{
     /*decltype(_impl_.tracing_context_)*/{::_pbi::ConstantInitialized()}
   , /*decltype(_impl_.dbname_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
+  , /*decltype(_impl_.timezone_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
   , /*decltype(_impl_._cached_size_)*/{}} {}
 struct RegionRequestHeaderDefaultTypeInternal {
   PROTOBUF_CONSTEXPR RegionRequestHeaderDefaultTypeInternal()
@@ -428,6 +429,7 @@ const uint32_t TableStruct_greptime_2fv1_2fregion_2fserver_2eproto::offsets[] PR
   ~0u,  // no _inlined_string_donated_
   PROTOBUF_FIELD_OFFSET(::greptime::v1::region::RegionRequestHeader, _impl_.tracing_context_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::region::RegionRequestHeader, _impl_.dbname_),
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::region::RegionRequestHeader, _impl_.timezone_),
   ~0u,  // no _has_bits_
   PROTOBUF_FIELD_OFFSET(::greptime::v1::region::RegionRequest, _internal_metadata_),
   ~0u,  // no _extensions_
@@ -657,32 +659,32 @@ const uint32_t TableStruct_greptime_2fv1_2fregion_2fserver_2eproto::offsets[] PR
 static const ::_pbi::MigrationSchema schemas[] PROTOBUF_SECTION_VARIABLE(protodesc_cold) = {
   { 0, 8, -1, sizeof(::greptime::v1::region::RegionRequestHeader_TracingContextEntry_DoNotUse)},
   { 10, -1, -1, sizeof(::greptime::v1::region::RegionRequestHeader)},
-  { 18, -1, -1, sizeof(::greptime::v1::region::RegionRequest)},
+  { 19, -1, -1, sizeof(::greptime::v1::region::RegionRequest)},
-  { 39, 47, -1, sizeof(::greptime::v1::region::RegionResponse_ExtensionEntry_DoNotUse)},
+  { 40, 48, -1, sizeof(::greptime::v1::region::RegionResponse_ExtensionEntry_DoNotUse)},
-  { 49, -1, -1, sizeof(::greptime::v1::region::RegionResponse)},
+  { 50, -1, -1, sizeof(::greptime::v1::region::RegionResponse)},
-  { 58, -1, -1, sizeof(::greptime::v1::region::InsertRequests)},
+  { 59, -1, -1, sizeof(::greptime::v1::region::InsertRequests)},
-  { 65, -1, -1, sizeof(::greptime::v1::region::DeleteRequests)},
+  { 66, -1, -1, sizeof(::greptime::v1::region::DeleteRequests)},
-  { 72, -1, -1, sizeof(::greptime::v1::region::InsertRequest)},
+  { 73, -1, -1, sizeof(::greptime::v1::region::InsertRequest)},
-  { 80, -1, -1, sizeof(::greptime::v1::region::DeleteRequest)},
+  { 81, -1, -1, sizeof(::greptime::v1::region::DeleteRequest)},
-  { 88, -1, -1, sizeof(::greptime::v1::region::QueryRequest)},
+  { 89, -1, -1, sizeof(::greptime::v1::region::QueryRequest)},
-  { 97, -1, -1, sizeof(::greptime::v1::region::CreateRequests)},
+  { 98, -1, -1, sizeof(::greptime::v1::region::CreateRequests)},
-  { 104, 112, -1, sizeof(::greptime::v1::region::CreateRequest_OptionsEntry_DoNotUse)},
+  { 105, 113, -1, sizeof(::greptime::v1::region::CreateRequest_OptionsEntry_DoNotUse)},
-  { 114, -1, -1, sizeof(::greptime::v1::region::CreateRequest)},
+  { 115, -1, -1, sizeof(::greptime::v1::region::CreateRequest)},
-  { 126, -1, -1, sizeof(::greptime::v1::region::DropRequests)},
+  { 127, -1, -1, sizeof(::greptime::v1::region::DropRequests)},
-  { 133, -1, -1, sizeof(::greptime::v1::region::DropRequest)},
+  { 134, -1, -1, sizeof(::greptime::v1::region::DropRequest)},
-  { 140, 148, -1, sizeof(::greptime::v1::region::OpenRequest_OptionsEntry_DoNotUse)},
+  { 141, 149, -1, sizeof(::greptime::v1::region::OpenRequest_OptionsEntry_DoNotUse)},
-  { 150, -1, -1, sizeof(::greptime::v1::region::OpenRequest)},
+  { 151, -1, -1, sizeof(::greptime::v1::region::OpenRequest)},
-  { 160, -1, -1, sizeof(::greptime::v1::region::CloseRequest)},
+  { 161, -1, -1, sizeof(::greptime::v1::region::CloseRequest)},
-  { 167, -1, -1, sizeof(::greptime::v1::region::AlterRequests)},
+  { 168, -1, -1, sizeof(::greptime::v1::region::AlterRequests)},
-  { 174, -1, -1, sizeof(::greptime::v1::region::AlterRequest)},
+  { 175, -1, -1, sizeof(::greptime::v1::region::AlterRequest)},
-  { 185, -1, -1, sizeof(::greptime::v1::region::AddColumns)},
+  { 186, -1, -1, sizeof(::greptime::v1::region::AddColumns)},
-  { 192, -1, -1, sizeof(::greptime::v1::region::DropColumns)},
+  { 193, -1, -1, sizeof(::greptime::v1::region::DropColumns)},
-  { 199, -1, -1, sizeof(::greptime::v1::region::AddColumn)},
+  { 200, -1, -1, sizeof(::greptime::v1::region::AddColumn)},
-  { 207, -1, -1, sizeof(::greptime::v1::region::DropColumn)},
+  { 208, -1, -1, sizeof(::greptime::v1::region::DropColumn)},
-  { 214, -1, -1, sizeof(::greptime::v1::region::FlushRequest)},
+  { 215, -1, -1, sizeof(::greptime::v1::region::FlushRequest)},
-  { 221, -1, -1, sizeof(::greptime::v1::region::CompactRequest)},
+  { 222, -1, -1, sizeof(::greptime::v1::region::CompactRequest)},
-  { 228, -1, -1, sizeof(::greptime::v1::region::TruncateRequest)},
+  { 229, -1, -1, sizeof(::greptime::v1::region::TruncateRequest)},
-  { 235, -1, -1, sizeof(::greptime::v1::region::RegionColumnDef)},
+  { 236, -1, -1, sizeof(::greptime::v1::region::RegionColumnDef)},
 };
 
 static const ::_pb::Message* const file_default_instances[] = {
@@ -720,84 +722,85 @@ const char descriptor_table_protodef_greptime_2fv1_2fregion_2fserver_2eproto[] P
   "\n\037greptime/v1/region/server.proto\022\022grept"
   "ime.v1.region\032\030greptime/v1/common.proto\032"
   "\025greptime/v1/row.proto\032\025greptime/v1/ddl."
-  "proto\"\262\001\n\023RegionRequestHeader\022T\n\017tracing"
+  "proto\"\304\001\n\023RegionRequestHeader\022T\n\017tracing"
   "_context\030\005 \003(\0132;.greptime.v1.region.Regi"
   "onRequestHeader.TracingContextEntry\022\016\n\006d"
-  "bname\030\003 \001(\t\0325\n\023TracingContextEntry\022\013\n\003ke"
+  "bname\030\003 \001(\t\022\020\n\010timezone\030\004 \001(\t\0325\n\023Tracing"
-  "y\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"\375\005\n\rRegionReq"
+  "ContextEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t"
-  "uest\0227\n\006header\030\001 \001(\0132\'.greptime.v1.regio"
+  ":\0028\001\"\375\005\n\rRegionRequest\0227\n\006header\030\001 \001(\0132\'"
-  "n.RegionRequestHeader\0225\n\007inserts\030\003 \001(\0132\""
+  ".greptime.v1.region.RegionRequestHeader\022"
-  ".greptime.v1.region.InsertRequestsH\000\0225\n\007"
+  "5\n\007inserts\030\003 \001(\0132\".greptime.v1.region.In"
-  "deletes\030\004 \001(\0132\".greptime.v1.region.Delet"
+  "sertRequestsH\000\0225\n\007deletes\030\004 \001(\0132\".grepti"
-  "eRequestsH\000\0223\n\006create\030\005 \001(\0132!.greptime.v"
+  "me.v1.region.DeleteRequestsH\000\0223\n\006create\030"
-  "1.region.CreateRequestH\000\022/\n\004drop\030\006 \001(\0132\037"
+  "\005 \001(\0132!.greptime.v1.region.CreateRequest"
-  ".greptime.v1.region.DropRequestH\000\022/\n\004ope"
+  "H\000\022/\n\004drop\030\006 \001(\0132\037.greptime.v1.region.Dr"
-  "n\030\007 \001(\0132\037.greptime.v1.region.OpenRequest"
+  "opRequestH\000\022/\n\004open\030\007 \001(\0132\037.greptime.v1."
-  "H\000\0221\n\005close\030\010 \001(\0132 .greptime.v1.region.C"
+  "region.OpenRequestH\000\0221\n\005close\030\010 \001(\0132 .gr"
-  "loseRequestH\000\0221\n\005alter\030\t \001(\0132 .greptime."
+  "eptime.v1.region.CloseRequestH\000\0221\n\005alter"
-  "v1.region.AlterRequestH\000\0221\n\005flush\030\n \001(\0132"
+  "\030\t \001(\0132 .greptime.v1.region.AlterRequest"
-  " .greptime.v1.region.FlushRequestH\000\0225\n\007c"
+  "H\000\0221\n\005flush\030\n \001(\0132 .greptime.v1.region.F"
-  "ompact\030\013 \001(\0132\".greptime.v1.region.Compac"
+  "lushRequestH\000\0225\n\007compact\030\013 \001(\0132\".greptim"
-  "tRequestH\000\0227\n\010truncate\030\014 \001(\0132#.greptime."
+  "e.v1.region.CompactRequestH\000\0227\n\010truncate"
-  "v1.region.TruncateRequestH\000\0225\n\007creates\030\r"
+  "\030\014 \001(\0132#.greptime.v1.region.TruncateRequ"
-  " \001(\0132\".greptime.v1.region.CreateRequests"
+  "estH\000\0225\n\007creates\030\r \001(\0132\".greptime.v1.reg"
-  "H\000\0221\n\005drops\030\016 \001(\0132 .greptime.v1.region.D"
+  "ion.CreateRequestsH\000\0221\n\005drops\030\016 \001(\0132 .gr"
-  "ropRequestsH\000\0223\n\006alters\030\017 \001(\0132!.greptime"
+  "eptime.v1.region.DropRequestsH\000\0223\n\006alter"
-  ".v1.region.AlterRequestsH\000B\006\n\004body\"\314\001\n\016R"
+  "s\030\017 \001(\0132!.greptime.v1.region.AlterReques"
-  "egionResponse\022+\n\006header\030\001 \001(\0132\033.greptime"
+  "tsH\000B\006\n\004body\"\314\001\n\016RegionResponse\022+\n\006heade"
-  ".v1.ResponseHeader\022\025\n\raffected_rows\030\002 \001("
+  "r\030\001 \001(\0132\033.greptime.v1.ResponseHeader\022\025\n\r"
-  "\004\022D\n\textension\030\003 \003(\01321.greptime.v1.regio"
+  "affected_rows\030\002 \001(\004\022D\n\textension\030\003 \003(\01321"
-  "n.RegionResponse.ExtensionEntry\0320\n\016Exten"
+  ".greptime.v1.region.RegionResponse.Exten"
-  "sionEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\014:\0028"
+  "sionEntry\0320\n\016ExtensionEntry\022\013\n\003key\030\001 \001(\t"
-  "\001\"E\n\016InsertRequests\0223\n\010requests\030\001 \003(\0132!."
+  "\022\r\n\005value\030\002 \001(\014:\0028\001\"E\n\016InsertRequests\0223\n"
-  "greptime.v1.region.InsertRequest\"E\n\016Dele"
+  "\010requests\030\001 \003(\0132!.greptime.v1.region.Ins"
-  "teRequests\0223\n\010requests\030\001 \003(\0132!.greptime."
+  "ertRequest\"E\n\016DeleteRequests\0223\n\010requests"
-  "v1.region.DeleteRequest\"C\n\rInsertRequest"
+  "\030\001 \003(\0132!.greptime.v1.region.DeleteReques"
-  "\022\021\n\tregion_id\030\001 \001(\004\022\037\n\004rows\030\002 \001(\0132\021.grep"
+  "t\"C\n\rInsertRequest\022\021\n\tregion_id\030\001 \001(\004\022\037\n"
-  "time.v1.Rows\"C\n\rDeleteRequest\022\021\n\tregion_"
+  "\004rows\030\002 \001(\0132\021.greptime.v1.Rows\"C\n\rDelete"
-  "id\030\001 \001(\004\022\037\n\004rows\030\002 \001(\0132\021.greptime.v1.Row"
+  "Request\022\021\n\tregion_id\030\001 \001(\004\022\037\n\004rows\030\002 \001(\013"
-  "s\"h\n\014QueryRequest\0227\n\006header\030\001 \001(\0132\'.grep"
+  "2\021.greptime.v1.Rows\"h\n\014QueryRequest\0227\n\006h"
-  "time.v1.region.RegionRequestHeader\022\021\n\tre"
+  "eader\030\001 \001(\0132\'.greptime.v1.region.RegionR"
-  "gion_id\030\002 \001(\004\022\014\n\004plan\030\003 \001(\014\"E\n\016CreateReq"
+  "equestHeader\022\021\n\tregion_id\030\002 \001(\004\022\014\n\004plan\030"
-  "uests\0223\n\010requests\030\001 \003(\0132!.greptime.v1.re"
+  "\003 \001(\014\"E\n\016CreateRequests\0223\n\010requests\030\001 \003("
-  "gion.CreateRequest\"\200\002\n\rCreateRequest\022\021\n\t"
+  "\0132!.greptime.v1.region.CreateRequest\"\200\002\n"
-  "region_id\030\001 \001(\004\022\016\n\006engine\030\002 \001(\t\0228\n\013colum"
+  "\rCreateRequest\022\021\n\tregion_id\030\001 \001(\004\022\016\n\006eng"
-  "n_defs\030\003 \003(\0132#.greptime.v1.region.Region"
+  "ine\030\002 \001(\t\0228\n\013column_defs\030\003 \003(\0132#.greptim"
-  "ColumnDef\022\023\n\013primary_key\030\004 \003(\r\022\014\n\004path\030\005"
+  "e.v1.region.RegionColumnDef\022\023\n\013primary_k"
-  " \001(\t\022\?\n\007options\030\006 \003(\0132..greptime.v1.regi"
+  "ey\030\004 \003(\r\022\014\n\004path\030\005 \001(\t\022\?\n\007options\030\006 \003(\0132"
-  "on.CreateRequest.OptionsEntry\032.\n\014Options"
+  "..greptime.v1.region.CreateRequest.Optio"
-  "Entry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"A\n"
+  "nsEntry\032.\n\014OptionsEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005"
-  "\014DropRequests\0221\n\010requests\030\001 \003(\0132\037.grepti"
+  "value\030\002 \001(\t:\0028\001\"A\n\014DropRequests\0221\n\010reque"
-  "me.v1.region.DropRequest\" \n\013DropRequest\022"
+  "sts\030\001 \003(\0132\037.greptime.v1.region.DropReque"
-  "\021\n\tregion_id\030\001 \001(\004\"\255\001\n\013OpenRequest\022\021\n\tre"
+  "st\" \n\013DropRequest\022\021\n\tregion_id\030\001 \001(\004\"\255\001\n"
-  "gion_id\030\001 \001(\004\022\016\n\006engine\030\002 \001(\t\022\014\n\004path\030\003 "
+  "\013OpenRequest\022\021\n\tregion_id\030\001 \001(\004\022\016\n\006engin"
-  "\001(\t\022=\n\007options\030\004 \003(\0132,.greptime.v1.regio"
+  "e\030\002 \001(\t\022\014\n\004path\030\003 \001(\t\022=\n\007options\030\004 \003(\0132,"
-  "n.OpenRequest.OptionsEntry\032.\n\014OptionsEnt"
+  ".greptime.v1.region.OpenRequest.OptionsE"
-  "ry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"!\n\014Cl"
+  "ntry\032.\n\014OptionsEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005val"
-  "oseRequest\022\021\n\tregion_id\030\001 \001(\004\"C\n\rAlterRe"
+  "ue\030\002 \001(\t:\0028\001\"!\n\014CloseRequest\022\021\n\tregion_i"
-  "quests\0222\n\010requests\030\001 \003(\0132 .greptime.v1.r"
+  "d\030\001 \001(\004\"C\n\rAlterRequests\0222\n\010requests\030\001 \003"
-  "egion.AlterRequest\"\261\001\n\014AlterRequest\022\021\n\tr"
+  "(\0132 .greptime.v1.region.AlterRequest\"\261\001\n"
-  "egion_id\030\001 \001(\004\0225\n\013add_columns\030\002 \001(\0132\036.gr"
+  "\014AlterRequest\022\021\n\tregion_id\030\001 \001(\004\0225\n\013add_"
-  "eptime.v1.region.AddColumnsH\000\0227\n\014drop_co"
+  "columns\030\002 \001(\0132\036.greptime.v1.region.AddCo"
-  "lumns\030\003 \001(\0132\037.greptime.v1.region.DropCol"
+  "lumnsH\000\0227\n\014drop_columns\030\003 \001(\0132\037.greptime"
-  "umnsH\000\022\026\n\016schema_version\030\004 \001(\004B\006\n\004kind\"@"
+  ".v1.region.DropColumnsH\000\022\026\n\016schema_versi"
-  "\n\nAddColumns\0222\n\013add_columns\030\001 \003(\0132\035.grep"
+  "on\030\004 \001(\004B\006\n\004kind\"@\n\nAddColumns\0222\n\013add_co"
-  "time.v1.region.AddColumn\"C\n\013DropColumns\022"
+  "lumns\030\001 \003(\0132\035.greptime.v1.region.AddColu"
-  "4\n\014drop_columns\030\001 \003(\0132\036.greptime.v1.regi"
+  "mn\"C\n\013DropColumns\0224\n\014drop_columns\030\001 \003(\0132"
-  "on.DropColumn\"v\n\tAddColumn\0227\n\ncolumn_def"
+  "\036.greptime.v1.region.DropColumn\"v\n\tAddCo"
-  "\030\001 \001(\0132#.greptime.v1.region.RegionColumn"
+  "lumn\0227\n\ncolumn_def\030\001 \001(\0132#.greptime.v1.r"
-  "Def\0220\n\010location\030\003 \001(\0132\036.greptime.v1.AddC"
+  "egion.RegionColumnDef\0220\n\010location\030\003 \001(\0132"
-  "olumnLocation\"\032\n\nDropColumn\022\014\n\004name\030\001 \001("
+  "\036.greptime.v1.AddColumnLocation\"\032\n\nDropC"
-  "\t\"!\n\014FlushRequest\022\021\n\tregion_id\030\001 \001(\004\"#\n\016"
+  "olumn\022\014\n\004name\030\001 \001(\t\"!\n\014FlushRequest\022\021\n\tr"
-  "CompactRequest\022\021\n\tregion_id\030\001 \001(\004\"$\n\017Tru"
+  "egion_id\030\001 \001(\004\"#\n\016CompactRequest\022\021\n\tregi"
-  "ncateRequest\022\021\n\tregion_id\030\001 \001(\004\"P\n\017Regio"
+  "on_id\030\001 \001(\004\"$\n\017TruncateRequest\022\021\n\tregion"
-  "nColumnDef\022*\n\ncolumn_def\030\001 \001(\0132\026.greptim"
+  "_id\030\001 \001(\004\"P\n\017RegionColumnDef\022*\n\ncolumn_d"
-  "e.v1.ColumnDef\022\021\n\tcolumn_id\030\002 \001(\r2Y\n\006Reg"
+  "ef\030\001 \001(\0132\026.greptime.v1.ColumnDef\022\021\n\tcolu"
-  "ion\022O\n\006Handle\022!.greptime.v1.region.Regio"
+  "mn_id\030\002 \001(\r2Y\n\006Region\022O\n\006Handle\022!.grepti"
-  "nRequest\032\".greptime.v1.region.RegionResp"
+  "me.v1.region.RegionRequest\032\".greptime.v1"
-  "onseB]\n\025io.greptime.v1.regionB\006ServerZ<g"
+  ".region.RegionResponseB]\n\025io.greptime.v1"
-  "ithub.com/GreptimeTeam/greptime-proto/go"
+  ".regionB\006ServerZ<github.com/GreptimeTeam"
-  "/greptime/v1/regionb\006proto3"
+  "/greptime-proto/go/greptime/v1/regionb\006p"
+  "roto3"
   ;
 static const ::_pbi::DescriptorTable* const descriptor_table_greptime_2fv1_2fregion_2fserver_2eproto_deps[3] = {
   &::descriptor_table_greptime_2fv1_2fcommon_2eproto,
@@ -806,7 +809,7 @@ static const ::_pbi::DescriptorTable* const descriptor_table_greptime_2fv1_2freg
 };
 static ::_pbi::once_flag descriptor_table_greptime_2fv1_2fregion_2fserver_2eproto_once;
 const ::_pbi::DescriptorTable descriptor_table_greptime_2fv1_2fregion_2fserver_2eproto = {
-    false, false, 3227, descriptor_table_protodef_greptime_2fv1_2fregion_2fserver_2eproto,
+    false, false, 3245, descriptor_table_protodef_greptime_2fv1_2fregion_2fserver_2eproto,
     "greptime/v1/region/server.proto",
     &descriptor_table_greptime_2fv1_2fregion_2fserver_2eproto_once, descriptor_table_greptime_2fv1_2fregion_2fserver_2eproto_deps, 3, 28,
     schemas, file_default_instances, TableStruct_greptime_2fv1_2fregion_2fserver_2eproto::offsets,
@@ -858,6 +861,7 @@ RegionRequestHeader::RegionRequestHeader(const RegionRequestHeader& from)
   new (&_impl_) Impl_{
       /*decltype(_impl_.tracing_context_)*/{}
     , decltype(_impl_.dbname_){}
+    , decltype(_impl_.timezone_){}
     , /*decltype(_impl_._cached_size_)*/{}};
 
   _internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
@@ -870,6 +874,14 @@ RegionRequestHeader::RegionRequestHeader(const RegionRequestHeader& from)
     _this->_impl_.dbname_.Set(from._internal_dbname(), 
       _this->GetArenaForAllocation());
   }
+  _impl_.timezone_.InitDefault();
+  #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+    _impl_.timezone_.Set("", GetArenaForAllocation());
+  #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  if (!from._internal_timezone().empty()) {
+    _this->_impl_.timezone_.Set(from._internal_timezone(), 
+      _this->GetArenaForAllocation());
+  }
   // @@protoc_insertion_point(copy_constructor:greptime.v1.region.RegionRequestHeader)
 }
 
@@ -880,12 +892,17 @@ inline void RegionRequestHeader::SharedCtor(
   new (&_impl_) Impl_{
       /*decltype(_impl_.tracing_context_)*/{::_pbi::ArenaInitialized(), arena}
     , decltype(_impl_.dbname_){}
+    , decltype(_impl_.timezone_){}
     , /*decltype(_impl_._cached_size_)*/{}
   };
   _impl_.dbname_.InitDefault();
   #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
     _impl_.dbname_.Set("", GetArenaForAllocation());
   #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  _impl_.timezone_.InitDefault();
+  #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+    _impl_.timezone_.Set("", GetArenaForAllocation());
+  #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
 }
 
 RegionRequestHeader::~RegionRequestHeader() {
@@ -903,6 +920,7 @@ inline void RegionRequestHeader::SharedDtor() {
   _impl_.tracing_context_.Destruct();
   _impl_.tracing_context_.~MapField();
   _impl_.dbname_.Destroy();
+  _impl_.timezone_.Destroy();
 }
 
 void RegionRequestHeader::ArenaDtor(void* object) {
@@ -921,6 +939,7 @@ void RegionRequestHeader::Clear() {
 
   _impl_.tracing_context_.Clear();
   _impl_.dbname_.ClearToEmpty();
+  _impl_.timezone_.ClearToEmpty();
   _internal_metadata_.Clear<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>();
 }
 
@@ -940,6 +959,16 @@ const char* RegionRequestHeader::_InternalParse(const char* ptr, ::_pbi::ParseCo
         } else
           goto handle_unusual;
         continue;
+      // string timezone = 4;
+      case 4:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 34)) {
+          auto str = _internal_mutable_timezone();
+          ptr = ::_pbi::InlineGreedyStringParser(str, ptr, ctx);
+          CHK_(ptr);
+          CHK_(::_pbi::VerifyUTF8(str, "greptime.v1.region.RegionRequestHeader.timezone"));
+        } else
+          goto handle_unusual;
+        continue;
       // map<string, string> tracing_context = 5;
       case 5:
         if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 42)) {
@@ -992,6 +1021,16 @@ uint8_t* RegionRequestHeader::_InternalSerialize(
         3, this->_internal_dbname(), target);
   }
 
+  // string timezone = 4;
+  if (!this->_internal_timezone().empty()) {
+    ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::VerifyUtf8String(
+      this->_internal_timezone().data(), static_cast<int>(this->_internal_timezone().length()),
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::SERIALIZE,
+      "greptime.v1.region.RegionRequestHeader.timezone");
+    target = stream->WriteStringMaybeAliased(
+        4, this->_internal_timezone(), target);
+  }
+
   // map<string, string> tracing_context = 5;
   if (!this->_internal_tracing_context().empty()) {
     using MapType = ::_pb::Map<std::string, std::string>;
@@ -1054,6 +1093,13 @@ size_t RegionRequestHeader::ByteSizeLong() const {
         this->_internal_dbname());
   }
 
+  // string timezone = 4;
+  if (!this->_internal_timezone().empty()) {
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::StringSize(
+        this->_internal_timezone());
+  }
+
   return MaybeComputeUnknownFieldsSize(total_size, &_impl_._cached_size_);
 }
 
@@ -1076,6 +1122,9 @@ void RegionRequestHeader::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, co
   if (!from._internal_dbname().empty()) {
     _this->_internal_set_dbname(from._internal_dbname());
   }
+  if (!from._internal_timezone().empty()) {
+    _this->_internal_set_timezone(from._internal_timezone());
+  }
   _this->_internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
 }
 
@@ -1100,6 +1149,10 @@ void RegionRequestHeader::InternalSwap(RegionRequestHeader* other) {
       &_impl_.dbname_, lhs_arena,
       &other->_impl_.dbname_, rhs_arena
   );
+  ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::InternalSwap(
+      &_impl_.timezone_, lhs_arena,
+      &other->_impl_.timezone_, rhs_arena
+  );
 }
 
 ::PROTOBUF_NAMESPACE_ID::Metadata RegionRequestHeader::GetMetadata() const {

c++/greptime/v1/region/server.pb.h

@@ -330,6 +330,7 @@ class RegionRequestHeader final :
   enum : int {
     kTracingContextFieldNumber = 5,
     kDbnameFieldNumber = 3,
+    kTimezoneFieldNumber = 4,
   };
   // map<string, string> tracing_context = 5;
   int tracing_context_size() const;
@@ -362,6 +363,20 @@ class RegionRequestHeader final :
   std::string* _internal_mutable_dbname();
   public:
 
+  // string timezone = 4;
+  void clear_timezone();
+  const std::string& timezone() const;
+  template <typename ArgT0 = const std::string&, typename... ArgT>
+  void set_timezone(ArgT0&& arg0, ArgT... args);
+  std::string* mutable_timezone();
+  PROTOBUF_NODISCARD std::string* release_timezone();
+  void set_allocated_timezone(std::string* timezone);
+  private:
+  const std::string& _internal_timezone() const;
+  inline PROTOBUF_ALWAYS_INLINE void _internal_set_timezone(const std::string& value);
+  std::string* _internal_mutable_timezone();
+  public:
+
   // @@protoc_insertion_point(class_scope:greptime.v1.region.RegionRequestHeader)
  private:
   class _Internal;
@@ -376,6 +391,7 @@ class RegionRequestHeader final :
         ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::TYPE_STRING,
         ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::TYPE_STRING> tracing_context_;
     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr dbname_;
+    ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr timezone_;
     mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
   };
   union { Impl_ _impl_; };
@@ -4739,6 +4755,56 @@ inline void RegionRequestHeader::set_allocated_dbname(std::string* dbname) {
   // @@protoc_insertion_point(field_set_allocated:greptime.v1.region.RegionRequestHeader.dbname)
 }
 
+// string timezone = 4;
+inline void RegionRequestHeader::clear_timezone() {
+  _impl_.timezone_.ClearToEmpty();
+}
+inline const std::string& RegionRequestHeader::timezone() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.region.RegionRequestHeader.timezone)
+  return _internal_timezone();
+}
+template <typename ArgT0, typename... ArgT>
+inline PROTOBUF_ALWAYS_INLINE
+void RegionRequestHeader::set_timezone(ArgT0&& arg0, ArgT... args) {
+ 
+ _impl_.timezone_.Set(static_cast<ArgT0 &&>(arg0), args..., GetArenaForAllocation());
+  // @@protoc_insertion_point(field_set:greptime.v1.region.RegionRequestHeader.timezone)
+}
+inline std::string* RegionRequestHeader::mutable_timezone() {
+  std::string* _s = _internal_mutable_timezone();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.region.RegionRequestHeader.timezone)
+  return _s;
+}
+inline const std::string& RegionRequestHeader::_internal_timezone() const {
+  return _impl_.timezone_.Get();
+}
+inline void RegionRequestHeader::_internal_set_timezone(const std::string& value) {
+  
+  _impl_.timezone_.Set(value, GetArenaForAllocation());
+}
+inline std::string* RegionRequestHeader::_internal_mutable_timezone() {
+  
+  return _impl_.timezone_.Mutable(GetArenaForAllocation());
+}
+inline std::string* RegionRequestHeader::release_timezone() {
+  // @@protoc_insertion_point(field_release:greptime.v1.region.RegionRequestHeader.timezone)
+  return _impl_.timezone_.Release();
+}
+inline void RegionRequestHeader::set_allocated_timezone(std::string* timezone) {
+  if (timezone != nullptr) {
+    
+  } else {
+    
+  }
+  _impl_.timezone_.SetAllocated(timezone, GetArenaForAllocation());
+#ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  if (_impl_.timezone_.IsDefault()) {
+    _impl_.timezone_.Set("", GetArenaForAllocation());
+  }
+#endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.region.RegionRequestHeader.timezone)
+}
+
 // -------------------------------------------------------------------
 
 // RegionRequest

java/src/main/java/io/greptime/v1/region/Server.java

@@ -98,6 +98,26 @@ java.lang.String defaultValue);
      */
     com.google.protobuf.ByteString
         getDbnameBytes();
+
+    /**
+     * <pre>
+     * The `timezone` for the request
+     * </pre>
+     *
+     * <code>string timezone = 4;</code>
+     * @return The timezone.
+     */
+    java.lang.String getTimezone();
+    /**
+     * <pre>
+     * The `timezone` for the request
+     * </pre>
+     *
+     * <code>string timezone = 4;</code>
+     * @return The bytes for timezone.
+     */
+    com.google.protobuf.ByteString
+        getTimezoneBytes();
   }
   /**
    * Protobuf type {@code greptime.v1.region.RegionRequestHeader}
@@ -113,6 +133,7 @@ java.lang.String defaultValue);
     }
     private RegionRequestHeader() {
       dbname_ = "";
+      timezone_ = "";
     }
 
     @java.lang.Override
@@ -152,6 +173,12 @@ java.lang.String defaultValue);
               dbname_ = s;
               break;
             }
+            case 34: {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              timezone_ = s;
+              break;
+            }
             case 42: {
               if (!((mutable_bitField0_ & 0x00000001) != 0)) {
                 tracingContext_ = com.google.protobuf.MapField.newMapField(
@@ -358,6 +385,52 @@ java.lang.String defaultValue);
       }
     }
 
+    public static final int TIMEZONE_FIELD_NUMBER = 4;
+    private volatile java.lang.Object timezone_;
+    /**
+     * <pre>
+     * The `timezone` for the request
+     * </pre>
+     *
+     * <code>string timezone = 4;</code>
+     * @return The timezone.
+     */
+    @java.lang.Override
+    public java.lang.String getTimezone() {
+      java.lang.Object ref = timezone_;
+      if (ref instanceof java.lang.String) {
+        return (java.lang.String) ref;
+      } else {
+        com.google.protobuf.ByteString bs = 
+            (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        timezone_ = s;
+        return s;
+      }
+    }
+    /**
+     * <pre>
+     * The `timezone` for the request
+     * </pre>
+     *
+     * <code>string timezone = 4;</code>
+     * @return The bytes for timezone.
+     */
+    @java.lang.Override
+    public com.google.protobuf.ByteString
+        getTimezoneBytes() {
+      java.lang.Object ref = timezone_;
+      if (ref instanceof java.lang.String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8(
+                (java.lang.String) ref);
+        timezone_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+
     private byte memoizedIsInitialized = -1;
     @java.lang.Override
     public final boolean isInitialized() {
@@ -375,6 +448,9 @@ java.lang.String defaultValue);
       if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(dbname_)) {
         com.google.protobuf.GeneratedMessageV3.writeString(output, 3, dbname_);
       }
+      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(timezone_)) {
+        com.google.protobuf.GeneratedMessageV3.writeString(output, 4, timezone_);
+      }
       com.google.protobuf.GeneratedMessageV3
         .serializeStringMapTo(
           output,
@@ -393,6 +469,9 @@ java.lang.String defaultValue);
       if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(dbname_)) {
         size += com.google.protobuf.GeneratedMessageV3.computeStringSize(3, dbname_);
       }
+      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(timezone_)) {
+        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(4, timezone_);
+      }
       for (java.util.Map.Entry<java.lang.String, java.lang.String> entry
            : internalGetTracingContext().getMap().entrySet()) {
         com.google.protobuf.MapEntry<java.lang.String, java.lang.String>
@@ -422,6 +501,8 @@ java.lang.String defaultValue);
           other.internalGetTracingContext())) return false;
       if (!getDbname()
           .equals(other.getDbname())) return false;
+      if (!getTimezone()
+          .equals(other.getTimezone())) return false;
       if (!unknownFields.equals(other.unknownFields)) return false;
       return true;
     }
@@ -439,6 +520,8 @@ java.lang.String defaultValue);
       }
       hash = (37 * hash) + DBNAME_FIELD_NUMBER;
       hash = (53 * hash) + getDbname().hashCode();
+      hash = (37 * hash) + TIMEZONE_FIELD_NUMBER;
+      hash = (53 * hash) + getTimezone().hashCode();
       hash = (29 * hash) + unknownFields.hashCode();
       memoizedHashCode = hash;
       return hash;
@@ -597,6 +680,8 @@ java.lang.String defaultValue);
         internalGetMutableTracingContext().clear();
         dbname_ = "";
 
+        timezone_ = "";
+
         return this;
       }
 
@@ -627,6 +712,7 @@ java.lang.String defaultValue);
         result.tracingContext_ = internalGetTracingContext();
         result.tracingContext_.makeImmutable();
         result.dbname_ = dbname_;
+        result.timezone_ = timezone_;
         onBuilt();
         return result;
       }
@@ -681,6 +767,10 @@ java.lang.String defaultValue);
           dbname_ = other.dbname_;
           onChanged();
         }
+        if (!other.getTimezone().isEmpty()) {
+          timezone_ = other.timezone_;
+          onChanged();
+        }
         this.mergeUnknownFields(other.unknownFields);
         onChanged();
         return this;
@@ -972,6 +1062,102 @@ java.lang.String defaultValue);
         onChanged();
         return this;
       }
+
+      private java.lang.Object timezone_ = "";
+      /**
+       * <pre>
+       * The `timezone` for the request
+       * </pre>
+       *
+       * <code>string timezone = 4;</code>
+       * @return The timezone.
+       */
+      public java.lang.String getTimezone() {
+        java.lang.Object ref = timezone_;
+        if (!(ref instanceof java.lang.String)) {
+          com.google.protobuf.ByteString bs =
+              (com.google.protobuf.ByteString) ref;
+          java.lang.String s = bs.toStringUtf8();
+          timezone_ = s;
+          return s;
+        } else {
+          return (java.lang.String) ref;
+        }
+      }
+      /**
+       * <pre>
+       * The `timezone` for the request
+       * </pre>
+       *
+       * <code>string timezone = 4;</code>
+       * @return The bytes for timezone.
+       */
+      public com.google.protobuf.ByteString
+          getTimezoneBytes() {
+        java.lang.Object ref = timezone_;
+        if (ref instanceof String) {
+          com.google.protobuf.ByteString b = 
+              com.google.protobuf.ByteString.copyFromUtf8(
+                  (java.lang.String) ref);
+          timezone_ = b;
+          return b;
+        } else {
+          return (com.google.protobuf.ByteString) ref;
+        }
+      }
+      /**
+       * <pre>
+       * The `timezone` for the request
+       * </pre>
+       *
+       * <code>string timezone = 4;</code>
+       * @param value The timezone to set.
+       * @return This builder for chaining.
+       */
+      public Builder setTimezone(
+          java.lang.String value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  
+        timezone_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <pre>
+       * The `timezone` for the request
+       * </pre>
+       *
+       * <code>string timezone = 4;</code>
+       * @return This builder for chaining.
+       */
+      public Builder clearTimezone() {
+        
+        timezone_ = getDefaultInstance().getTimezone();
+        onChanged();
+        return this;
+      }
+      /**
+       * <pre>
+       * The `timezone` for the request
+       * </pre>
+       *
+       * <code>string timezone = 4;</code>
+       * @param value The bytes for timezone to set.
+       * @return This builder for chaining.
+       */
+      public Builder setTimezoneBytes(
+          com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  checkByteStringIsUtf8(value);
+        
+        timezone_ = value;
+        onChanged();
+        return this;
+      }
       @java.lang.Override
       public final Builder setUnknownFields(
           final com.google.protobuf.UnknownFieldSet unknownFields) {
@@ -22546,84 +22732,85 @@ java.lang.String defaultValue);
       "\n\037greptime/v1/region/server.proto\022\022grept" +
       "ime.v1.region\032\030greptime/v1/common.proto\032" +
       "\025greptime/v1/row.proto\032\025greptime/v1/ddl." +
-      "proto\"\262\001\n\023RegionRequestHeader\022T\n\017tracing" +
+      "proto\"\304\001\n\023RegionRequestHeader\022T\n\017tracing" +
       "_context\030\005 \003(\0132;.greptime.v1.region.Regi" +
       "onRequestHeader.TracingContextEntry\022\016\n\006d" +
-      "bname\030\003 \001(\t\0325\n\023TracingContextEntry\022\013\n\003ke" +
+      "bname\030\003 \001(\t\022\020\n\010timezone\030\004 \001(\t\0325\n\023Tracing" +
-      "y\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"\375\005\n\rRegionReq" +
+      "ContextEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t" +
-      "uest\0227\n\006header\030\001 \001(\0132\'.greptime.v1.regio" +
+      ":\0028\001\"\375\005\n\rRegionRequest\0227\n\006header\030\001 \001(\0132\'" +
-      "n.RegionRequestHeader\0225\n\007inserts\030\003 \001(\0132\"" +
+      ".greptime.v1.region.RegionRequestHeader\022" +
-      ".greptime.v1.region.InsertRequestsH\000\0225\n\007" +
+      "5\n\007inserts\030\003 \001(\0132\".greptime.v1.region.In" +
-      "deletes\030\004 \001(\0132\".greptime.v1.region.Delet" +
+      "sertRequestsH\000\0225\n\007deletes\030\004 \001(\0132\".grepti" +
-      "eRequestsH\000\0223\n\006create\030\005 \001(\0132!.greptime.v" +
+      "me.v1.region.DeleteRequestsH\000\0223\n\006create\030" +
-      "1.region.CreateRequestH\000\022/\n\004drop\030\006 \001(\0132\037" +
+      "\005 \001(\0132!.greptime.v1.region.CreateRequest" +
-      ".greptime.v1.region.DropRequestH\000\022/\n\004ope" +
+      "H\000\022/\n\004drop\030\006 \001(\0132\037.greptime.v1.region.Dr" +
-      "n\030\007 \001(\0132\037.greptime.v1.region.OpenRequest" +
+      "opRequestH\000\022/\n\004open\030\007 \001(\0132\037.greptime.v1." +
-      "H\000\0221\n\005close\030\010 \001(\0132 .greptime.v1.region.C" +
+      "region.OpenRequestH\000\0221\n\005close\030\010 \001(\0132 .gr" +
-      "loseRequestH\000\0221\n\005alter\030\t \001(\0132 .greptime." +
+      "eptime.v1.region.CloseRequestH\000\0221\n\005alter" +
-      "v1.region.AlterRequestH\000\0221\n\005flush\030\n \001(\0132" +
+      "\030\t \001(\0132 .greptime.v1.region.AlterRequest" +
-      " .greptime.v1.region.FlushRequestH\000\0225\n\007c" +
+      "H\000\0221\n\005flush\030\n \001(\0132 .greptime.v1.region.F" +
-      "ompact\030\013 \001(\0132\".greptime.v1.region.Compac" +
+      "lushRequestH\000\0225\n\007compact\030\013 \001(\0132\".greptim" +
-      "tRequestH\000\0227\n\010truncate\030\014 \001(\0132#.greptime." +
+      "e.v1.region.CompactRequestH\000\0227\n\010truncate" +
-      "v1.region.TruncateRequestH\000\0225\n\007creates\030\r" +
+      "\030\014 \001(\0132#.greptime.v1.region.TruncateRequ" +
-      " \001(\0132\".greptime.v1.region.CreateRequests" +
+      "estH\000\0225\n\007creates\030\r \001(\0132\".greptime.v1.reg" +
-      "H\000\0221\n\005drops\030\016 \001(\0132 .greptime.v1.region.D" +
+      "ion.CreateRequestsH\000\0221\n\005drops\030\016 \001(\0132 .gr" +
-      "ropRequestsH\000\0223\n\006alters\030\017 \001(\0132!.greptime" +
+      "eptime.v1.region.DropRequestsH\000\0223\n\006alter" +
-      ".v1.region.AlterRequestsH\000B\006\n\004body\"\314\001\n\016R" +
+      "s\030\017 \001(\0132!.greptime.v1.region.AlterReques" +
-      "egionResponse\022+\n\006header\030\001 \001(\0132\033.greptime" +
+      "tsH\000B\006\n\004body\"\314\001\n\016RegionResponse\022+\n\006heade" +
-      ".v1.ResponseHeader\022\025\n\raffected_rows\030\002 \001(" +
+      "r\030\001 \001(\0132\033.greptime.v1.ResponseHeader\022\025\n\r" +
-      "\004\022D\n\textension\030\003 \003(\01321.greptime.v1.regio" +
+      "affected_rows\030\002 \001(\004\022D\n\textension\030\003 \003(\01321" +
-      "n.RegionResponse.ExtensionEntry\0320\n\016Exten" +
+      ".greptime.v1.region.RegionResponse.Exten" +
-      "sionEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\014:\0028" +
+      "sionEntry\0320\n\016ExtensionEntry\022\013\n\003key\030\001 \001(\t" +
-      "\001\"E\n\016InsertRequests\0223\n\010requests\030\001 \003(\0132!." +
+      "\022\r\n\005value\030\002 \001(\014:\0028\001\"E\n\016InsertRequests\0223\n" +
-      "greptime.v1.region.InsertRequest\"E\n\016Dele" +
+      "\010requests\030\001 \003(\0132!.greptime.v1.region.Ins" +
-      "teRequests\0223\n\010requests\030\001 \003(\0132!.greptime." +
+      "ertRequest\"E\n\016DeleteRequests\0223\n\010requests" +
-      "v1.region.DeleteRequest\"C\n\rInsertRequest" +
+      "\030\001 \003(\0132!.greptime.v1.region.DeleteReques" +
-      "\022\021\n\tregion_id\030\001 \001(\004\022\037\n\004rows\030\002 \001(\0132\021.grep" +
+      "t\"C\n\rInsertRequest\022\021\n\tregion_id\030\001 \001(\004\022\037\n" +
-      "time.v1.Rows\"C\n\rDeleteRequest\022\021\n\tregion_" +
+      "\004rows\030\002 \001(\0132\021.greptime.v1.Rows\"C\n\rDelete" +
-      "id\030\001 \001(\004\022\037\n\004rows\030\002 \001(\0132\021.greptime.v1.Row" +
+      "Request\022\021\n\tregion_id\030\001 \001(\004\022\037\n\004rows\030\002 \001(\013" +
-      "s\"h\n\014QueryRequest\0227\n\006header\030\001 \001(\0132\'.grep" +
+      "2\021.greptime.v1.Rows\"h\n\014QueryRequest\0227\n\006h" +
-      "time.v1.region.RegionRequestHeader\022\021\n\tre" +
+      "eader\030\001 \001(\0132\'.greptime.v1.region.RegionR" +
-      "gion_id\030\002 \001(\004\022\014\n\004plan\030\003 \001(\014\"E\n\016CreateReq" +
+      "equestHeader\022\021\n\tregion_id\030\002 \001(\004\022\014\n\004plan\030" +
-      "uests\0223\n\010requests\030\001 \003(\0132!.greptime.v1.re" +
+      "\003 \001(\014\"E\n\016CreateRequests\0223\n\010requests\030\001 \003(" +
-      "gion.CreateRequest\"\200\002\n\rCreateRequest\022\021\n\t" +
+      "\0132!.greptime.v1.region.CreateRequest\"\200\002\n" +
-      "region_id\030\001 \001(\004\022\016\n\006engine\030\002 \001(\t\0228\n\013colum" +
+      "\rCreateRequest\022\021\n\tregion_id\030\001 \001(\004\022\016\n\006eng" +
-      "n_defs\030\003 \003(\0132#.greptime.v1.region.Region" +
+      "ine\030\002 \001(\t\0228\n\013column_defs\030\003 \003(\0132#.greptim" +
-      "ColumnDef\022\023\n\013primary_key\030\004 \003(\r\022\014\n\004path\030\005" +
+      "e.v1.region.RegionColumnDef\022\023\n\013primary_k" +
-      " \001(\t\022?\n\007options\030\006 \003(\0132..greptime.v1.regi" +
+      "ey\030\004 \003(\r\022\014\n\004path\030\005 \001(\t\022?\n\007options\030\006 \003(\0132" +
-      "on.CreateRequest.OptionsEntry\032.\n\014Options" +
+      "..greptime.v1.region.CreateRequest.Optio" +
-      "Entry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"A\n" +
+      "nsEntry\032.\n\014OptionsEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005" +
-      "\014DropRequests\0221\n\010requests\030\001 \003(\0132\037.grepti" +
+      "value\030\002 \001(\t:\0028\001\"A\n\014DropRequests\0221\n\010reque" +
-      "me.v1.region.DropRequest\" \n\013DropRequest\022" +
+      "sts\030\001 \003(\0132\037.greptime.v1.region.DropReque" +
-      "\021\n\tregion_id\030\001 \001(\004\"\255\001\n\013OpenRequest\022\021\n\tre" +
+      "st\" \n\013DropRequest\022\021\n\tregion_id\030\001 \001(\004\"\255\001\n" +
-      "gion_id\030\001 \001(\004\022\016\n\006engine\030\002 \001(\t\022\014\n\004path\030\003 " +
+      "\013OpenRequest\022\021\n\tregion_id\030\001 \001(\004\022\016\n\006engin" +
-      "\001(\t\022=\n\007options\030\004 \003(\0132,.greptime.v1.regio" +
+      "e\030\002 \001(\t\022\014\n\004path\030\003 \001(\t\022=\n\007options\030\004 \003(\0132," +
-      "n.OpenRequest.OptionsEntry\032.\n\014OptionsEnt" +
+      ".greptime.v1.region.OpenRequest.OptionsE" +
-      "ry\022\013\n\003key\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"!\n\014Cl" +
+      "ntry\032.\n\014OptionsEntry\022\013\n\003key\030\001 \001(\t\022\r\n\005val" +
-      "oseRequest\022\021\n\tregion_id\030\001 \001(\004\"C\n\rAlterRe" +
+      "ue\030\002 \001(\t:\0028\001\"!\n\014CloseRequest\022\021\n\tregion_i" +
-      "quests\0222\n\010requests\030\001 \003(\0132 .greptime.v1.r" +
+      "d\030\001 \001(\004\"C\n\rAlterRequests\0222\n\010requests\030\001 \003" +
-      "egion.AlterRequest\"\261\001\n\014AlterRequest\022\021\n\tr" +
+      "(\0132 .greptime.v1.region.AlterRequest\"\261\001\n" +
-      "egion_id\030\001 \001(\004\0225\n\013add_columns\030\002 \001(\0132\036.gr" +
+      "\014AlterRequest\022\021\n\tregion_id\030\001 \001(\004\0225\n\013add_" +
-      "eptime.v1.region.AddColumnsH\000\0227\n\014drop_co" +
+      "columns\030\002 \001(\0132\036.greptime.v1.region.AddCo" +
-      "lumns\030\003 \001(\0132\037.greptime.v1.region.DropCol" +
+      "lumnsH\000\0227\n\014drop_columns\030\003 \001(\0132\037.greptime" +
-      "umnsH\000\022\026\n\016schema_version\030\004 \001(\004B\006\n\004kind\"@" +
+      ".v1.region.DropColumnsH\000\022\026\n\016schema_versi" +
-      "\n\nAddColumns\0222\n\013add_columns\030\001 \003(\0132\035.grep" +
+      "on\030\004 \001(\004B\006\n\004kind\"@\n\nAddColumns\0222\n\013add_co" +
-      "time.v1.region.AddColumn\"C\n\013DropColumns\022" +
+      "lumns\030\001 \003(\0132\035.greptime.v1.region.AddColu" +
-      "4\n\014drop_columns\030\001 \003(\0132\036.greptime.v1.regi" +
+      "mn\"C\n\013DropColumns\0224\n\014drop_columns\030\001 \003(\0132" +
-      "on.DropColumn\"v\n\tAddColumn\0227\n\ncolumn_def" +
+      "\036.greptime.v1.region.DropColumn\"v\n\tAddCo" +
-      "\030\001 \001(\0132#.greptime.v1.region.RegionColumn" +
+      "lumn\0227\n\ncolumn_def\030\001 \001(\0132#.greptime.v1.r" +
-      "Def\0220\n\010location\030\003 \001(\0132\036.greptime.v1.AddC" +
+      "egion.RegionColumnDef\0220\n\010location\030\003 \001(\0132" +
-      "olumnLocation\"\032\n\nDropColumn\022\014\n\004name\030\001 \001(" +
+      "\036.greptime.v1.AddColumnLocation\"\032\n\nDropC" +
-      "\t\"!\n\014FlushRequest\022\021\n\tregion_id\030\001 \001(\004\"#\n\016" +
+      "olumn\022\014\n\004name\030\001 \001(\t\"!\n\014FlushRequest\022\021\n\tr" +
-      "CompactRequest\022\021\n\tregion_id\030\001 \001(\004\"$\n\017Tru" +
+      "egion_id\030\001 \001(\004\"#\n\016CompactRequest\022\021\n\tregi" +
-      "ncateRequest\022\021\n\tregion_id\030\001 \001(\004\"P\n\017Regio" +
+      "on_id\030\001 \001(\004\"$\n\017TruncateRequest\022\021\n\tregion" +
-      "nColumnDef\022*\n\ncolumn_def\030\001 \001(\0132\026.greptim" +
+      "_id\030\001 \001(\004\"P\n\017RegionColumnDef\022*\n\ncolumn_d" +
-      "e.v1.ColumnDef\022\021\n\tcolumn_id\030\002 \001(\r2Y\n\006Reg" +
+      "ef\030\001 \001(\0132\026.greptime.v1.ColumnDef\022\021\n\tcolu" +
-      "ion\022O\n\006Handle\022!.greptime.v1.region.Regio" +
+      "mn_id\030\002 \001(\r2Y\n\006Region\022O\n\006Handle\022!.grepti" +
-      "nRequest\032\".greptime.v1.region.RegionResp" +
+      "me.v1.region.RegionRequest\032\".greptime.v1" +
-      "onseB]\n\025io.greptime.v1.regionB\006ServerZ<g" +
+      ".region.RegionResponseB]\n\025io.greptime.v1" +
-      "ithub.com/GreptimeTeam/greptime-proto/go" +
+      ".regionB\006ServerZ<github.com/GreptimeTeam" +
-      "/greptime/v1/regionb\006proto3"
+      "/greptime-proto/go/greptime/v1/regionb\006p" +
+      "roto3"
     };
     descriptor = com.google.protobuf.Descriptors.FileDescriptor
       .internalBuildGeneratedFileFrom(descriptorData,
@@ -22637,7 +22824,7 @@ java.lang.String defaultValue);
     internal_static_greptime_v1_region_RegionRequestHeader_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_region_RegionRequestHeader_descriptor,
-        new java.lang.String[] { "TracingContext", "Dbname", });
+        new java.lang.String[] { "TracingContext", "Dbname", "Timezone", });
     internal_static_greptime_v1_region_RegionRequestHeader_TracingContextEntry_descriptor =
       internal_static_greptime_v1_region_RegionRequestHeader_descriptor.getNestedTypes().get(0);
     internal_static_greptime_v1_region_RegionRequestHeader_TracingContextEntry_fieldAccessorTable = new

proto/greptime/v1/ddl.proto

@@ -33,9 +33,30 @@ message DdlRequest {
     AlterExpr alter = 3;
     DropTableExpr drop_table = 4;
     TruncateTableExpr truncate_table = 7;
+    CreateTaskExpr create_task = 8;
+    RemoveTaskExpr remove_task = 9;
   }
 }
 
+// Create a flow task to run the SQL when new data arrives.
+message CreateTaskExpr {
+  string catalog_name = 1;
+  string task_name = 2;
+  string output_schema_name = 3;
+  string output_table_name = 4;
+  bool create_if_not_exists = 5;
+  string expire_when = 6;
+  string comment = 7;
+  string sql = 8;
+  map<string, string> task_options = 9;
+}
+
+// Remove a flow task.
+message RemoveTaskExpr {
+  string catalog_name = 1;
+  string task_name = 2;
+}
+
 message CreateTableExpr {
   string catalog_name = 1;
   string schema_name = 2;

proto/greptime/v1/flow/server.proto

@@ -0,0 +1,71 @@
+// Copyright 2023 Greptime Team
+//
+// 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,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package greptime.v1.flow;
+
+option java_package = "io.greptime.v1.flow";
+option java_outer_classname = "Server";
+option go_package = "github.com/GreptimeTeam/greptime-proto/go/greptime/v1/flow";
+
+import "greptime/v1/common.proto";
+import "greptime/v1/ddl.proto";
+import "greptime/v1/row.proto";
+
+service Flow {
+  // Handle the control plane request for creating or removing a flow.
+  rpc HandleCreateRemove(FlowRequest) returns (FlowResponse);
+  // Handle the data plane request for inserting or deleting rows
+  // only expect `RegionRequest` to be one of `InsertRequests` or
+  // `DeleteRequests` other types of `RegionRequest` will be ignored
+  rpc HandleMirrorRequest(InsertRequests) returns (FlowResponse);
+}
+
+message InsertRequests { repeated InsertRequest requests = 1; }
+
+message InsertRequest {
+  uint64 region_id = 1;
+  Rows rows = 2;
+}
+
+message FlowRequest {
+  oneof body {
+    FlowCreateRequest create = 1;
+    FlowRemoveRequest remove = 2;
+  }
+}
+
+message FlowResponse {
+  ResponseHeader header = 1;
+  uint64 affected_rows = 2;
+  map<string, bytes> extension = 3;
+  // affected task ids
+  repeated TaskId affected_tasks = 4;
+}
+
+// very similar to `ddl.CreateTaskExpr` just replace `task_name` with `task_id`
+message FlowCreateRequest {
+  TaskId task_id = 1;
+  TableId output_table_id = 2;
+  bool create_if_not_exists = 3;
+  string expire_when = 4;
+  string comment = 5;
+  string sql = 6;
+  map<string, string> task_options = 7;
+}
+
+message FlowRemoveRequest { TaskId task_id = 1; }
+
+message TaskId { uint32 id = 1; }