feat: add source_tables and source_table_ids (#151)

* feat: add `source_tables`

* feat: use `SchemaScopedTableName`

* chore: include flow proto

* chore: rename

* feat: add `CreateFlowTask` and `DropFlowTask`

build.rs

@@ -45,6 +45,7 @@ fn main() {
                 "proto/greptime/v1/meta/cluster.proto",
                 "proto/greptime/v1/meta/procedure.proto",
                 "proto/greptime/v1/region/server.proto",
+                "proto/greptime/v1/flow/server.proto",
                 "proto/greptime/v1/index/inverted_index.proto",
                 "proto/prometheus/remote/remote.proto",
                 "proto/substrait_extension/promql_plan.proto",

c++/greptime/v1/meta/ddl.pb.cc

@@ -142,6 +142,32 @@ struct DropDatabaseTaskDefaultTypeInternal {
   };
 };
 PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 DropDatabaseTaskDefaultTypeInternal _DropDatabaseTask_default_instance_;
+PROTOBUF_CONSTEXPR CreateFlowTask::CreateFlowTask(
+    ::_pbi::ConstantInitialized): _impl_{
+    /*decltype(_impl_.create_flow_task_)*/nullptr
+  , /*decltype(_impl_._cached_size_)*/{}} {}
+struct CreateFlowTaskDefaultTypeInternal {
+  PROTOBUF_CONSTEXPR CreateFlowTaskDefaultTypeInternal()
+      : _instance(::_pbi::ConstantInitialized{}) {}
+  ~CreateFlowTaskDefaultTypeInternal() {}
+  union {
+    CreateFlowTask _instance;
+  };
+};
+PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 CreateFlowTaskDefaultTypeInternal _CreateFlowTask_default_instance_;
+PROTOBUF_CONSTEXPR DropFlowTask::DropFlowTask(
+    ::_pbi::ConstantInitialized): _impl_{
+    /*decltype(_impl_.drop_flow_task_)*/nullptr
+  , /*decltype(_impl_._cached_size_)*/{}} {}
+struct DropFlowTaskDefaultTypeInternal {
+  PROTOBUF_CONSTEXPR DropFlowTaskDefaultTypeInternal()
+      : _instance(::_pbi::ConstantInitialized{}) {}
+  ~DropFlowTaskDefaultTypeInternal() {}
+  union {
+    DropFlowTask _instance;
+  };
+};
+PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 DropFlowTaskDefaultTypeInternal _DropFlowTask_default_instance_;
 PROTOBUF_CONSTEXPR DdlTaskRequest::DdlTaskRequest(
     ::_pbi::ConstantInitialized): _impl_{
     /*decltype(_impl_.header_)*/nullptr
@@ -176,7 +202,7 @@ PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORIT
 }  // namespace meta
 }  // namespace v1
 }  // namespace greptime
-static ::_pb::Metadata file_level_metadata_greptime_2fv1_2fmeta_2fddl_2eproto[11];
+static ::_pb::Metadata file_level_metadata_greptime_2fv1_2fmeta_2fddl_2eproto[13];
 static const ::_pb::EnumDescriptor* file_level_enum_descriptors_greptime_2fv1_2fmeta_2fddl_2eproto[1];
 static constexpr ::_pb::ServiceDescriptor const** file_level_service_descriptors_greptime_2fv1_2fmeta_2fddl_2eproto = nullptr;
 
@@ -247,6 +273,20 @@ const uint32_t TableStruct_greptime_2fv1_2fmeta_2fddl_2eproto::offsets[] PROTOBU
   ~0u,  // no _inlined_string_donated_
   PROTOBUF_FIELD_OFFSET(::greptime::v1::meta::DropDatabaseTask, _impl_.drop_database_),
   ~0u,  // no _has_bits_
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::meta::CreateFlowTask, _internal_metadata_),
+  ~0u,  // no _extensions_
+  ~0u,  // no _oneof_case_
+  ~0u,  // no _weak_field_map_
+  ~0u,  // no _inlined_string_donated_
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::meta::CreateFlowTask, _impl_.create_flow_task_),
+  ~0u,  // no _has_bits_
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::meta::DropFlowTask, _internal_metadata_),
+  ~0u,  // no _extensions_
+  ~0u,  // no _oneof_case_
+  ~0u,  // no _weak_field_map_
+  ~0u,  // no _inlined_string_donated_
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::meta::DropFlowTask, _impl_.drop_flow_task_),
+  ~0u,  // no _has_bits_
   PROTOBUF_FIELD_OFFSET(::greptime::v1::meta::DdlTaskRequest, _internal_metadata_),
   ~0u,  // no _extensions_
   PROTOBUF_FIELD_OFFSET(::greptime::v1::meta::DdlTaskRequest, _impl_._oneof_case_[0]),
@@ -262,6 +302,8 @@ const uint32_t TableStruct_greptime_2fv1_2fmeta_2fddl_2eproto::offsets[] PROTOBU
   ::_pbi::kInvalidFieldOffsetTag,
   ::_pbi::kInvalidFieldOffsetTag,
   ::_pbi::kInvalidFieldOffsetTag,
+  ::_pbi::kInvalidFieldOffsetTag,
+  ::_pbi::kInvalidFieldOffsetTag,
   PROTOBUF_FIELD_OFFSET(::greptime::v1::meta::DdlTaskRequest, _impl_.task_),
   ~0u,  // no _has_bits_
   PROTOBUF_FIELD_OFFSET(::greptime::v1::meta::DdlTaskResponse, _internal_metadata_),
@@ -284,8 +326,10 @@ static const ::_pbi::MigrationSchema schemas[] PROTOBUF_SECTION_VARIABLE(protode
   { 44, -1, -1, sizeof(::greptime::v1::meta::AlterTableTasks)},
   { 51, -1, -1, sizeof(::greptime::v1::meta::TruncateTableTask)},
   { 58, -1, -1, sizeof(::greptime::v1::meta::DropDatabaseTask)},
-  { 65, -1, -1, sizeof(::greptime::v1::meta::DdlTaskRequest)},
+  { 65, -1, -1, sizeof(::greptime::v1::meta::CreateFlowTask)},
-  { 82, -1, -1, sizeof(::greptime::v1::meta::DdlTaskResponse)},
+  { 72, -1, -1, sizeof(::greptime::v1::meta::DropFlowTask)},
+  { 79, -1, -1, sizeof(::greptime::v1::meta::DdlTaskRequest)},
+  { 98, -1, -1, sizeof(::greptime::v1::meta::DdlTaskResponse)},
 };
 
 static const ::_pb::Message* const file_default_instances[] = {
@@ -298,6 +342,8 @@ static const ::_pb::Message* const file_default_instances[] = {
   &::greptime::v1::meta::_AlterTableTasks_default_instance_._instance,
   &::greptime::v1::meta::_TruncateTableTask_default_instance_._instance,
   &::greptime::v1::meta::_DropDatabaseTask_default_instance_._instance,
+  &::greptime::v1::meta::_CreateFlowTask_default_instance_._instance,
+  &::greptime::v1::meta::_DropFlowTask_default_instance_._instance,
   &::greptime::v1::meta::_DdlTaskRequest_default_instance_._instance,
   &::greptime::v1::meta::_DdlTaskResponse_default_instance_._instance,
 };
@@ -323,32 +369,38 @@ const char descriptor_table_protodef_greptime_2fv1_2fmeta_2fddl_2eproto[] PROTOB
   "ask\"K\n\021TruncateTableTask\0226\n\016truncate_tab"
   "le\030\001 \001(\0132\036.greptime.v1.TruncateTableExpr"
   "\"H\n\020DropDatabaseTask\0224\n\rdrop_database\030\001 "
-  "\001(\0132\035.greptime.v1.DropDatabaseExpr\"\217\005\n\016D"
+  "\001(\0132\035.greptime.v1.DropDatabaseExpr\"K\n\016Cr"
-  "dlTaskRequest\022/\n\006header\030\001 \001(\0132\037.greptime"
+  "eateFlowTask\0229\n\020create_flow_task\030\001 \001(\0132\037"
-  ".v1.meta.RequestHeader\022>\n\021create_table_t"
+  ".greptime.v1.CreateFlowTaskExpr\"E\n\014DropF"
-  "ask\030\002 \001(\0132!.greptime.v1.meta.CreateTable"
+  "lowTask\0225\n\016drop_flow_task\030\001 \001(\0132\035.grepti"
-  "TaskH\000\022:\n\017drop_table_task\030\003 \001(\0132\037.grepti"
+  "me.v1.DropFlowTaskExpr\"\207\006\n\016DdlTaskReques"
-  "me.v1.meta.DropTableTaskH\000\022<\n\020alter_tabl"
+  "t\022/\n\006header\030\001 \001(\0132\037.greptime.v1.meta.Req"
-  "e_task\030\004 \001(\0132 .greptime.v1.meta.AlterTab"
+  "uestHeader\022>\n\021create_table_task\030\002 \001(\0132!."
-  "leTaskH\000\022B\n\023truncate_table_task\030\005 \001(\0132#."
+  "greptime.v1.meta.CreateTableTaskH\000\022:\n\017dr"
-  "greptime.v1.meta.TruncateTableTaskH\000\022@\n\022"
+  "op_table_task\030\003 \001(\0132\037.greptime.v1.meta.D"
-  "create_table_tasks\030\006 \001(\0132\".greptime.v1.m"
+  "ropTableTaskH\000\022<\n\020alter_table_task\030\004 \001(\013"
-  "eta.CreateTableTasksH\000\022<\n\020drop_table_tas"
+  "2 .greptime.v1.meta.AlterTableTaskH\000\022B\n\023"
-  "ks\030\007 \001(\0132 .greptime.v1.meta.DropTableTas"
+  "truncate_table_task\030\005 \001(\0132#.greptime.v1."
-  "ksH\000\022>\n\021alter_table_tasks\030\010 \001(\0132!.grepti"
+  "meta.TruncateTableTaskH\000\022@\n\022create_table"
-  "me.v1.meta.AlterTableTasksH\000\022@\n\022drop_dat"
+  "_tasks\030\006 \001(\0132\".greptime.v1.meta.CreateTa"
-  "abase_task\030\t \001(\0132\".greptime.v1.meta.Drop"
+  "bleTasksH\000\022<\n\020drop_table_tasks\030\007 \001(\0132 .g"
-  "DatabaseTaskH\000\022D\n\024create_database_task\030\n"
+  "reptime.v1.meta.DropTableTasksH\000\022>\n\021alte"
-  " \001(\0132$.greptime.v1.meta.CreateDatabaseTa"
+  "r_table_tasks\030\010 \001(\0132!.greptime.v1.meta.A"
-  "skH\000B\006\n\004task\"\312\001\n\017DdlTaskResponse\0220\n\006head"
+  "lterTableTasksH\000\022@\n\022drop_database_task\030\t"
-  "er\030\001 \001(\0132 .greptime.v1.meta.ResponseHead"
+  " \001(\0132\".greptime.v1.meta.DropDatabaseTask"
-  "er\022*\n\003pid\030\002 \001(\0132\035.greptime.v1.meta.Proce"
+  "H\000\022D\n\024create_database_task\030\n \001(\0132$.grept"
-  "dureId\022+\n\010table_id\030\004 \001(\0132\031.greptime.v1.m"
+  "ime.v1.meta.CreateDatabaseTaskH\000\022<\n\020crea"
-  "eta.TableId\022,\n\ttable_ids\030\005 \003(\0132\031.greptim"
+  "te_flow_task\030\013 \001(\0132 .greptime.v1.meta.Cr"
-  "e.v1.meta.TableId*#\n\013DdlTaskType\022\n\n\006Crea"
+  "eateFlowTaskH\000\0228\n\016drop_flow_task\030\014 \001(\0132\036"
-  "te\020\000\022\010\n\004Drop\020\001B<Z:github.com/GreptimeTea"
+  ".greptime.v1.meta.DropFlowTaskH\000B\006\n\004task"
-  "m/greptime-proto/go/greptime/v1/metab\006pr"
+  "\"\312\001\n\017DdlTaskResponse\0220\n\006header\030\001 \001(\0132 .g"
-  "oto3"
+  "reptime.v1.meta.ResponseHeader\022*\n\003pid\030\002 "
+  "\001(\0132\035.greptime.v1.meta.ProcedureId\022+\n\010ta"
+  "ble_id\030\004 \001(\0132\031.greptime.v1.meta.TableId\022"
+  ",\n\ttable_ids\030\005 \003(\0132\031.greptime.v1.meta.Ta"
+  "bleId*#\n\013DdlTaskType\022\n\n\006Create\020\000\022\010\n\004Drop"
+  "\020\001B<Z:github.com/GreptimeTeam/greptime-p"
+  "roto/go/greptime/v1/metab\006proto3"
   ;
 static const ::_pbi::DescriptorTable* const descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_deps[3] = {
   &::descriptor_table_greptime_2fv1_2fddl_2eproto,
@@ -357,9 +409,9 @@ static const ::_pbi::DescriptorTable* const descriptor_table_greptime_2fv1_2fmet
 };
 static ::_pbi::once_flag descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_once;
 const ::_pbi::DescriptorTable descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto = {
-    false, false, 1804, descriptor_table_protodef_greptime_2fv1_2fmeta_2fddl_2eproto,
+    false, false, 2072, descriptor_table_protodef_greptime_2fv1_2fmeta_2fddl_2eproto,
     "greptime/v1/meta/ddl.proto",
-    &descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_once, descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_deps, 3, 11,
+    &descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_once, descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_deps, 3, 13,
     schemas, file_default_instances, TableStruct_greptime_2fv1_2fmeta_2fddl_2eproto::offsets,
     file_level_metadata_greptime_2fv1_2fmeta_2fddl_2eproto, file_level_enum_descriptors_greptime_2fv1_2fmeta_2fddl_2eproto,
     file_level_service_descriptors_greptime_2fv1_2fmeta_2fddl_2eproto,
@@ -2223,6 +2275,404 @@ void DropDatabaseTask::InternalSwap(DropDatabaseTask* other) {
 
 // ===================================================================
 
+class CreateFlowTask::_Internal {
+ public:
+  static const ::greptime::v1::CreateFlowTaskExpr& create_flow_task(const CreateFlowTask* msg);
+};
+
+const ::greptime::v1::CreateFlowTaskExpr&
+CreateFlowTask::_Internal::create_flow_task(const CreateFlowTask* msg) {
+  return *msg->_impl_.create_flow_task_;
+}
+void CreateFlowTask::clear_create_flow_task() {
+  if (GetArenaForAllocation() == nullptr && _impl_.create_flow_task_ != nullptr) {
+    delete _impl_.create_flow_task_;
+  }
+  _impl_.create_flow_task_ = nullptr;
+}
+CreateFlowTask::CreateFlowTask(::PROTOBUF_NAMESPACE_ID::Arena* arena,
+                         bool is_message_owned)
+  : ::PROTOBUF_NAMESPACE_ID::Message(arena, is_message_owned) {
+  SharedCtor(arena, is_message_owned);
+  // @@protoc_insertion_point(arena_constructor:greptime.v1.meta.CreateFlowTask)
+}
+CreateFlowTask::CreateFlowTask(const CreateFlowTask& from)
+  : ::PROTOBUF_NAMESPACE_ID::Message() {
+  CreateFlowTask* const _this = this; (void)_this;
+  new (&_impl_) Impl_{
+      decltype(_impl_.create_flow_task_){nullptr}
+    , /*decltype(_impl_._cached_size_)*/{}};
+
+  _internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
+  if (from._internal_has_create_flow_task()) {
+    _this->_impl_.create_flow_task_ = new ::greptime::v1::CreateFlowTaskExpr(*from._impl_.create_flow_task_);
+  }
+  // @@protoc_insertion_point(copy_constructor:greptime.v1.meta.CreateFlowTask)
+}
+
+inline void CreateFlowTask::SharedCtor(
+    ::_pb::Arena* arena, bool is_message_owned) {
+  (void)arena;
+  (void)is_message_owned;
+  new (&_impl_) Impl_{
+      decltype(_impl_.create_flow_task_){nullptr}
+    , /*decltype(_impl_._cached_size_)*/{}
+  };
+}
+
+CreateFlowTask::~CreateFlowTask() {
+  // @@protoc_insertion_point(destructor:greptime.v1.meta.CreateFlowTask)
+  if (auto *arena = _internal_metadata_.DeleteReturnArena<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>()) {
+  (void)arena;
+    return;
+  }
+  SharedDtor();
+}
+
+inline void CreateFlowTask::SharedDtor() {
+  GOOGLE_DCHECK(GetArenaForAllocation() == nullptr);
+  if (this != internal_default_instance()) delete _impl_.create_flow_task_;
+}
+
+void CreateFlowTask::SetCachedSize(int size) const {
+  _impl_._cached_size_.Set(size);
+}
+
+void CreateFlowTask::Clear() {
+// @@protoc_insertion_point(message_clear_start:greptime.v1.meta.CreateFlowTask)
+  uint32_t cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  if (GetArenaForAllocation() == nullptr && _impl_.create_flow_task_ != nullptr) {
+    delete _impl_.create_flow_task_;
+  }
+  _impl_.create_flow_task_ = nullptr;
+  _internal_metadata_.Clear<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>();
+}
+
+const char* CreateFlowTask::_InternalParse(const char* ptr, ::_pbi::ParseContext* ctx) {
+#define CHK_(x) if (PROTOBUF_PREDICT_FALSE(!(x))) goto failure
+  while (!ctx->Done(&ptr)) {
+    uint32_t tag;
+    ptr = ::_pbi::ReadTag(ptr, &tag);
+    switch (tag >> 3) {
+      // .greptime.v1.CreateFlowTaskExpr create_flow_task = 1;
+      case 1:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 10)) {
+          ptr = ctx->ParseMessage(_internal_mutable_create_flow_task(), ptr);
+          CHK_(ptr);
+        } else
+          goto handle_unusual;
+        continue;
+      default:
+        goto handle_unusual;
+    }  // switch
+  handle_unusual:
+    if ((tag == 0) || ((tag & 7) == 4)) {
+      CHK_(ptr);
+      ctx->SetLastTag(tag);
+      goto message_done;
+    }
+    ptr = UnknownFieldParse(
+        tag,
+        _internal_metadata_.mutable_unknown_fields<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(),
+        ptr, ctx);
+    CHK_(ptr != nullptr);
+  }  // while
+message_done:
+  return ptr;
+failure:
+  ptr = nullptr;
+  goto message_done;
+#undef CHK_
+}
+
+uint8_t* CreateFlowTask::_InternalSerialize(
+    uint8_t* target, ::PROTOBUF_NAMESPACE_ID::io::EpsCopyOutputStream* stream) const {
+  // @@protoc_insertion_point(serialize_to_array_start:greptime.v1.meta.CreateFlowTask)
+  uint32_t cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  // .greptime.v1.CreateFlowTaskExpr create_flow_task = 1;
+  if (this->_internal_has_create_flow_task()) {
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::
+      InternalWriteMessage(1, _Internal::create_flow_task(this),
+        _Internal::create_flow_task(this).GetCachedSize(), target, stream);
+  }
+
+  if (PROTOBUF_PREDICT_FALSE(_internal_metadata_.have_unknown_fields())) {
+    target = ::_pbi::WireFormat::InternalSerializeUnknownFieldsToArray(
+        _internal_metadata_.unknown_fields<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(::PROTOBUF_NAMESPACE_ID::UnknownFieldSet::default_instance), target, stream);
+  }
+  // @@protoc_insertion_point(serialize_to_array_end:greptime.v1.meta.CreateFlowTask)
+  return target;
+}
+
+size_t CreateFlowTask::ByteSizeLong() const {
+// @@protoc_insertion_point(message_byte_size_start:greptime.v1.meta.CreateFlowTask)
+  size_t total_size = 0;
+
+  uint32_t cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  // .greptime.v1.CreateFlowTaskExpr create_flow_task = 1;
+  if (this->_internal_has_create_flow_task()) {
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::MessageSize(
+        *_impl_.create_flow_task_);
+  }
+
+  return MaybeComputeUnknownFieldsSize(total_size, &_impl_._cached_size_);
+}
+
+const ::PROTOBUF_NAMESPACE_ID::Message::ClassData CreateFlowTask::_class_data_ = {
+    ::PROTOBUF_NAMESPACE_ID::Message::CopyWithSourceCheck,
+    CreateFlowTask::MergeImpl
+};
+const ::PROTOBUF_NAMESPACE_ID::Message::ClassData*CreateFlowTask::GetClassData() const { return &_class_data_; }
+
+
+void CreateFlowTask::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::PROTOBUF_NAMESPACE_ID::Message& from_msg) {
+  auto* const _this = static_cast<CreateFlowTask*>(&to_msg);
+  auto& from = static_cast<const CreateFlowTask&>(from_msg);
+  // @@protoc_insertion_point(class_specific_merge_from_start:greptime.v1.meta.CreateFlowTask)
+  GOOGLE_DCHECK_NE(&from, _this);
+  uint32_t cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  if (from._internal_has_create_flow_task()) {
+    _this->_internal_mutable_create_flow_task()->::greptime::v1::CreateFlowTaskExpr::MergeFrom(
+        from._internal_create_flow_task());
+  }
+  _this->_internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
+}
+
+void CreateFlowTask::CopyFrom(const CreateFlowTask& from) {
+// @@protoc_insertion_point(class_specific_copy_from_start:greptime.v1.meta.CreateFlowTask)
+  if (&from == this) return;
+  Clear();
+  MergeFrom(from);
+}
+
+bool CreateFlowTask::IsInitialized() const {
+  return true;
+}
+
+void CreateFlowTask::InternalSwap(CreateFlowTask* other) {
+  using std::swap;
+  _internal_metadata_.InternalSwap(&other->_internal_metadata_);
+  swap(_impl_.create_flow_task_, other->_impl_.create_flow_task_);
+}
+
+::PROTOBUF_NAMESPACE_ID::Metadata CreateFlowTask::GetMetadata() const {
+  return ::_pbi::AssignDescriptors(
+      &descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_getter, &descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_once,
+      file_level_metadata_greptime_2fv1_2fmeta_2fddl_2eproto[9]);
+}
+
+// ===================================================================
+
+class DropFlowTask::_Internal {
+ public:
+  static const ::greptime::v1::DropFlowTaskExpr& drop_flow_task(const DropFlowTask* msg);
+};
+
+const ::greptime::v1::DropFlowTaskExpr&
+DropFlowTask::_Internal::drop_flow_task(const DropFlowTask* msg) {
+  return *msg->_impl_.drop_flow_task_;
+}
+void DropFlowTask::clear_drop_flow_task() {
+  if (GetArenaForAllocation() == nullptr && _impl_.drop_flow_task_ != nullptr) {
+    delete _impl_.drop_flow_task_;
+  }
+  _impl_.drop_flow_task_ = nullptr;
+}
+DropFlowTask::DropFlowTask(::PROTOBUF_NAMESPACE_ID::Arena* arena,
+                         bool is_message_owned)
+  : ::PROTOBUF_NAMESPACE_ID::Message(arena, is_message_owned) {
+  SharedCtor(arena, is_message_owned);
+  // @@protoc_insertion_point(arena_constructor:greptime.v1.meta.DropFlowTask)
+}
+DropFlowTask::DropFlowTask(const DropFlowTask& from)
+  : ::PROTOBUF_NAMESPACE_ID::Message() {
+  DropFlowTask* const _this = this; (void)_this;
+  new (&_impl_) Impl_{
+      decltype(_impl_.drop_flow_task_){nullptr}
+    , /*decltype(_impl_._cached_size_)*/{}};
+
+  _internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
+  if (from._internal_has_drop_flow_task()) {
+    _this->_impl_.drop_flow_task_ = new ::greptime::v1::DropFlowTaskExpr(*from._impl_.drop_flow_task_);
+  }
+  // @@protoc_insertion_point(copy_constructor:greptime.v1.meta.DropFlowTask)
+}
+
+inline void DropFlowTask::SharedCtor(
+    ::_pb::Arena* arena, bool is_message_owned) {
+  (void)arena;
+  (void)is_message_owned;
+  new (&_impl_) Impl_{
+      decltype(_impl_.drop_flow_task_){nullptr}
+    , /*decltype(_impl_._cached_size_)*/{}
+  };
+}
+
+DropFlowTask::~DropFlowTask() {
+  // @@protoc_insertion_point(destructor:greptime.v1.meta.DropFlowTask)
+  if (auto *arena = _internal_metadata_.DeleteReturnArena<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>()) {
+  (void)arena;
+    return;
+  }
+  SharedDtor();
+}
+
+inline void DropFlowTask::SharedDtor() {
+  GOOGLE_DCHECK(GetArenaForAllocation() == nullptr);
+  if (this != internal_default_instance()) delete _impl_.drop_flow_task_;
+}
+
+void DropFlowTask::SetCachedSize(int size) const {
+  _impl_._cached_size_.Set(size);
+}
+
+void DropFlowTask::Clear() {
+// @@protoc_insertion_point(message_clear_start:greptime.v1.meta.DropFlowTask)
+  uint32_t cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  if (GetArenaForAllocation() == nullptr && _impl_.drop_flow_task_ != nullptr) {
+    delete _impl_.drop_flow_task_;
+  }
+  _impl_.drop_flow_task_ = nullptr;
+  _internal_metadata_.Clear<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>();
+}
+
+const char* DropFlowTask::_InternalParse(const char* ptr, ::_pbi::ParseContext* ctx) {
+#define CHK_(x) if (PROTOBUF_PREDICT_FALSE(!(x))) goto failure
+  while (!ctx->Done(&ptr)) {
+    uint32_t tag;
+    ptr = ::_pbi::ReadTag(ptr, &tag);
+    switch (tag >> 3) {
+      // .greptime.v1.DropFlowTaskExpr drop_flow_task = 1;
+      case 1:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 10)) {
+          ptr = ctx->ParseMessage(_internal_mutable_drop_flow_task(), ptr);
+          CHK_(ptr);
+        } else
+          goto handle_unusual;
+        continue;
+      default:
+        goto handle_unusual;
+    }  // switch
+  handle_unusual:
+    if ((tag == 0) || ((tag & 7) == 4)) {
+      CHK_(ptr);
+      ctx->SetLastTag(tag);
+      goto message_done;
+    }
+    ptr = UnknownFieldParse(
+        tag,
+        _internal_metadata_.mutable_unknown_fields<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(),
+        ptr, ctx);
+    CHK_(ptr != nullptr);
+  }  // while
+message_done:
+  return ptr;
+failure:
+  ptr = nullptr;
+  goto message_done;
+#undef CHK_
+}
+
+uint8_t* DropFlowTask::_InternalSerialize(
+    uint8_t* target, ::PROTOBUF_NAMESPACE_ID::io::EpsCopyOutputStream* stream) const {
+  // @@protoc_insertion_point(serialize_to_array_start:greptime.v1.meta.DropFlowTask)
+  uint32_t cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  // .greptime.v1.DropFlowTaskExpr drop_flow_task = 1;
+  if (this->_internal_has_drop_flow_task()) {
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::
+      InternalWriteMessage(1, _Internal::drop_flow_task(this),
+        _Internal::drop_flow_task(this).GetCachedSize(), target, stream);
+  }
+
+  if (PROTOBUF_PREDICT_FALSE(_internal_metadata_.have_unknown_fields())) {
+    target = ::_pbi::WireFormat::InternalSerializeUnknownFieldsToArray(
+        _internal_metadata_.unknown_fields<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(::PROTOBUF_NAMESPACE_ID::UnknownFieldSet::default_instance), target, stream);
+  }
+  // @@protoc_insertion_point(serialize_to_array_end:greptime.v1.meta.DropFlowTask)
+  return target;
+}
+
+size_t DropFlowTask::ByteSizeLong() const {
+// @@protoc_insertion_point(message_byte_size_start:greptime.v1.meta.DropFlowTask)
+  size_t total_size = 0;
+
+  uint32_t cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  // .greptime.v1.DropFlowTaskExpr drop_flow_task = 1;
+  if (this->_internal_has_drop_flow_task()) {
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::MessageSize(
+        *_impl_.drop_flow_task_);
+  }
+
+  return MaybeComputeUnknownFieldsSize(total_size, &_impl_._cached_size_);
+}
+
+const ::PROTOBUF_NAMESPACE_ID::Message::ClassData DropFlowTask::_class_data_ = {
+    ::PROTOBUF_NAMESPACE_ID::Message::CopyWithSourceCheck,
+    DropFlowTask::MergeImpl
+};
+const ::PROTOBUF_NAMESPACE_ID::Message::ClassData*DropFlowTask::GetClassData() const { return &_class_data_; }
+
+
+void DropFlowTask::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::PROTOBUF_NAMESPACE_ID::Message& from_msg) {
+  auto* const _this = static_cast<DropFlowTask*>(&to_msg);
+  auto& from = static_cast<const DropFlowTask&>(from_msg);
+  // @@protoc_insertion_point(class_specific_merge_from_start:greptime.v1.meta.DropFlowTask)
+  GOOGLE_DCHECK_NE(&from, _this);
+  uint32_t cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  if (from._internal_has_drop_flow_task()) {
+    _this->_internal_mutable_drop_flow_task()->::greptime::v1::DropFlowTaskExpr::MergeFrom(
+        from._internal_drop_flow_task());
+  }
+  _this->_internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
+}
+
+void DropFlowTask::CopyFrom(const DropFlowTask& from) {
+// @@protoc_insertion_point(class_specific_copy_from_start:greptime.v1.meta.DropFlowTask)
+  if (&from == this) return;
+  Clear();
+  MergeFrom(from);
+}
+
+bool DropFlowTask::IsInitialized() const {
+  return true;
+}
+
+void DropFlowTask::InternalSwap(DropFlowTask* other) {
+  using std::swap;
+  _internal_metadata_.InternalSwap(&other->_internal_metadata_);
+  swap(_impl_.drop_flow_task_, other->_impl_.drop_flow_task_);
+}
+
+::PROTOBUF_NAMESPACE_ID::Metadata DropFlowTask::GetMetadata() const {
+  return ::_pbi::AssignDescriptors(
+      &descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_getter, &descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_once,
+      file_level_metadata_greptime_2fv1_2fmeta_2fddl_2eproto[10]);
+}
+
+// ===================================================================
+
 class DdlTaskRequest::_Internal {
  public:
   static const ::greptime::v1::meta::RequestHeader& header(const DdlTaskRequest* msg);
@@ -2235,6 +2685,8 @@ class DdlTaskRequest::_Internal {
   static const ::greptime::v1::meta::AlterTableTasks& alter_table_tasks(const DdlTaskRequest* msg);
   static const ::greptime::v1::meta::DropDatabaseTask& drop_database_task(const DdlTaskRequest* msg);
   static const ::greptime::v1::meta::CreateDatabaseTask& create_database_task(const DdlTaskRequest* msg);
+  static const ::greptime::v1::meta::CreateFlowTask& create_flow_task(const DdlTaskRequest* msg);
+  static const ::greptime::v1::meta::DropFlowTask& drop_flow_task(const DdlTaskRequest* msg);
 };
 
 const ::greptime::v1::meta::RequestHeader&
@@ -2277,6 +2729,14 @@ const ::greptime::v1::meta::CreateDatabaseTask&
 DdlTaskRequest::_Internal::create_database_task(const DdlTaskRequest* msg) {
   return *msg->_impl_.task_.create_database_task_;
 }
+const ::greptime::v1::meta::CreateFlowTask&
+DdlTaskRequest::_Internal::create_flow_task(const DdlTaskRequest* msg) {
+  return *msg->_impl_.task_.create_flow_task_;
+}
+const ::greptime::v1::meta::DropFlowTask&
+DdlTaskRequest::_Internal::drop_flow_task(const DdlTaskRequest* msg) {
+  return *msg->_impl_.task_.drop_flow_task_;
+}
 void DdlTaskRequest::clear_header() {
   if (GetArenaForAllocation() == nullptr && _impl_.header_ != nullptr) {
     delete _impl_.header_;
@@ -2418,6 +2878,36 @@ void DdlTaskRequest::set_allocated_create_database_task(::greptime::v1::meta::Cr
   }
   // @@protoc_insertion_point(field_set_allocated:greptime.v1.meta.DdlTaskRequest.create_database_task)
 }
+void DdlTaskRequest::set_allocated_create_flow_task(::greptime::v1::meta::CreateFlowTask* create_flow_task) {
+  ::PROTOBUF_NAMESPACE_ID::Arena* message_arena = GetArenaForAllocation();
+  clear_task();
+  if (create_flow_task) {
+    ::PROTOBUF_NAMESPACE_ID::Arena* submessage_arena =
+      ::PROTOBUF_NAMESPACE_ID::Arena::InternalGetOwningArena(create_flow_task);
+    if (message_arena != submessage_arena) {
+      create_flow_task = ::PROTOBUF_NAMESPACE_ID::internal::GetOwnedMessage(
+          message_arena, create_flow_task, submessage_arena);
+    }
+    set_has_create_flow_task();
+    _impl_.task_.create_flow_task_ = create_flow_task;
+  }
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.meta.DdlTaskRequest.create_flow_task)
+}
+void DdlTaskRequest::set_allocated_drop_flow_task(::greptime::v1::meta::DropFlowTask* drop_flow_task) {
+  ::PROTOBUF_NAMESPACE_ID::Arena* message_arena = GetArenaForAllocation();
+  clear_task();
+  if (drop_flow_task) {
+    ::PROTOBUF_NAMESPACE_ID::Arena* submessage_arena =
+      ::PROTOBUF_NAMESPACE_ID::Arena::InternalGetOwningArena(drop_flow_task);
+    if (message_arena != submessage_arena) {
+      drop_flow_task = ::PROTOBUF_NAMESPACE_ID::internal::GetOwnedMessage(
+          message_arena, drop_flow_task, submessage_arena);
+    }
+    set_has_drop_flow_task();
+    _impl_.task_.drop_flow_task_ = drop_flow_task;
+  }
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.meta.DdlTaskRequest.drop_flow_task)
+}
 DdlTaskRequest::DdlTaskRequest(::PROTOBUF_NAMESPACE_ID::Arena* arena,
                          bool is_message_owned)
   : ::PROTOBUF_NAMESPACE_ID::Message(arena, is_message_owned) {
@@ -2484,6 +2974,16 @@ DdlTaskRequest::DdlTaskRequest(const DdlTaskRequest& from)
           from._internal_create_database_task());
       break;
     }
+    case kCreateFlowTask: {
+      _this->_internal_mutable_create_flow_task()->::greptime::v1::meta::CreateFlowTask::MergeFrom(
+          from._internal_create_flow_task());
+      break;
+    }
+    case kDropFlowTask: {
+      _this->_internal_mutable_drop_flow_task()->::greptime::v1::meta::DropFlowTask::MergeFrom(
+          from._internal_drop_flow_task());
+      break;
+    }
     case TASK_NOT_SET: {
       break;
     }
@@ -2582,6 +3082,18 @@ void DdlTaskRequest::clear_task() {
       }
       break;
     }
+    case kCreateFlowTask: {
+      if (GetArenaForAllocation() == nullptr) {
+        delete _impl_.task_.create_flow_task_;
+      }
+      break;
+    }
+    case kDropFlowTask: {
+      if (GetArenaForAllocation() == nullptr) {
+        delete _impl_.task_.drop_flow_task_;
+      }
+      break;
+    }
     case TASK_NOT_SET: {
       break;
     }
@@ -2690,6 +3202,22 @@ const char* DdlTaskRequest::_InternalParse(const char* ptr, ::_pbi::ParseContext
         } else
           goto handle_unusual;
         continue;
+      // .greptime.v1.meta.CreateFlowTask create_flow_task = 11;
+      case 11:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 90)) {
+          ptr = ctx->ParseMessage(_internal_mutable_create_flow_task(), ptr);
+          CHK_(ptr);
+        } else
+          goto handle_unusual;
+        continue;
+      // .greptime.v1.meta.DropFlowTask drop_flow_task = 12;
+      case 12:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 98)) {
+          ptr = ctx->ParseMessage(_internal_mutable_drop_flow_task(), ptr);
+          CHK_(ptr);
+        } else
+          goto handle_unusual;
+        continue;
       default:
         goto handle_unusual;
     }  // switch
@@ -2789,6 +3317,20 @@ uint8_t* DdlTaskRequest::_InternalSerialize(
         _Internal::create_database_task(this).GetCachedSize(), target, stream);
   }
 
+  // .greptime.v1.meta.CreateFlowTask create_flow_task = 11;
+  if (_internal_has_create_flow_task()) {
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::
+      InternalWriteMessage(11, _Internal::create_flow_task(this),
+        _Internal::create_flow_task(this).GetCachedSize(), target, stream);
+  }
+
+  // .greptime.v1.meta.DropFlowTask drop_flow_task = 12;
+  if (_internal_has_drop_flow_task()) {
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::
+      InternalWriteMessage(12, _Internal::drop_flow_task(this),
+        _Internal::drop_flow_task(this).GetCachedSize(), target, stream);
+  }
+
   if (PROTOBUF_PREDICT_FALSE(_internal_metadata_.have_unknown_fields())) {
     target = ::_pbi::WireFormat::InternalSerializeUnknownFieldsToArray(
         _internal_metadata_.unknown_fields<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(::PROTOBUF_NAMESPACE_ID::UnknownFieldSet::default_instance), target, stream);
@@ -2876,6 +3418,20 @@ size_t DdlTaskRequest::ByteSizeLong() const {
           *_impl_.task_.create_database_task_);
       break;
     }
+    // .greptime.v1.meta.CreateFlowTask create_flow_task = 11;
+    case kCreateFlowTask: {
+      total_size += 1 +
+        ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::MessageSize(
+          *_impl_.task_.create_flow_task_);
+      break;
+    }
+    // .greptime.v1.meta.DropFlowTask drop_flow_task = 12;
+    case kDropFlowTask: {
+      total_size += 1 +
+        ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::MessageSize(
+          *_impl_.task_.drop_flow_task_);
+      break;
+    }
     case TASK_NOT_SET: {
       break;
     }
@@ -2948,6 +3504,16 @@ void DdlTaskRequest::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const :
           from._internal_create_database_task());
       break;
     }
+    case kCreateFlowTask: {
+      _this->_internal_mutable_create_flow_task()->::greptime::v1::meta::CreateFlowTask::MergeFrom(
+          from._internal_create_flow_task());
+      break;
+    }
+    case kDropFlowTask: {
+      _this->_internal_mutable_drop_flow_task()->::greptime::v1::meta::DropFlowTask::MergeFrom(
+          from._internal_drop_flow_task());
+      break;
+    }
     case TASK_NOT_SET: {
       break;
     }
@@ -2977,7 +3543,7 @@ void DdlTaskRequest::InternalSwap(DdlTaskRequest* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata DdlTaskRequest::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_getter, &descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fmeta_2fddl_2eproto[9]);
+      file_level_metadata_greptime_2fv1_2fmeta_2fddl_2eproto[11]);
 }
 
 // ===================================================================
@@ -3312,7 +3878,7 @@ void DdlTaskResponse::InternalSwap(DdlTaskResponse* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata DdlTaskResponse::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_getter, &descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fmeta_2fddl_2eproto[10]);
+      file_level_metadata_greptime_2fv1_2fmeta_2fddl_2eproto[12]);
 }
 
 // @@protoc_insertion_point(namespace_scope)
@@ -3356,6 +3922,14 @@ template<> PROTOBUF_NOINLINE ::greptime::v1::meta::DropDatabaseTask*
 Arena::CreateMaybeMessage< ::greptime::v1::meta::DropDatabaseTask >(Arena* arena) {
   return Arena::CreateMessageInternal< ::greptime::v1::meta::DropDatabaseTask >(arena);
 }
+template<> PROTOBUF_NOINLINE ::greptime::v1::meta::CreateFlowTask*
+Arena::CreateMaybeMessage< ::greptime::v1::meta::CreateFlowTask >(Arena* arena) {
+  return Arena::CreateMessageInternal< ::greptime::v1::meta::CreateFlowTask >(arena);
+}
+template<> PROTOBUF_NOINLINE ::greptime::v1::meta::DropFlowTask*
+Arena::CreateMaybeMessage< ::greptime::v1::meta::DropFlowTask >(Arena* arena) {
+  return Arena::CreateMessageInternal< ::greptime::v1::meta::DropFlowTask >(arena);
+}
 template<> PROTOBUF_NOINLINE ::greptime::v1::meta::DdlTaskRequest*
 Arena::CreateMaybeMessage< ::greptime::v1::meta::DdlTaskRequest >(Arena* arena) {
   return Arena::CreateMessageInternal< ::greptime::v1::meta::DdlTaskRequest >(arena);

c++/greptime/v1/meta/ddl.pb.h

@@ -60,6 +60,9 @@ extern AlterTableTasksDefaultTypeInternal _AlterTableTasks_default_instance_;
 class CreateDatabaseTask;
 struct CreateDatabaseTaskDefaultTypeInternal;
 extern CreateDatabaseTaskDefaultTypeInternal _CreateDatabaseTask_default_instance_;
+class CreateFlowTask;
+struct CreateFlowTaskDefaultTypeInternal;
+extern CreateFlowTaskDefaultTypeInternal _CreateFlowTask_default_instance_;
 class CreateTableTask;
 struct CreateTableTaskDefaultTypeInternal;
 extern CreateTableTaskDefaultTypeInternal _CreateTableTask_default_instance_;
@@ -75,6 +78,9 @@ extern DdlTaskResponseDefaultTypeInternal _DdlTaskResponse_default_instance_;
 class DropDatabaseTask;
 struct DropDatabaseTaskDefaultTypeInternal;
 extern DropDatabaseTaskDefaultTypeInternal _DropDatabaseTask_default_instance_;
+class DropFlowTask;
+struct DropFlowTaskDefaultTypeInternal;
+extern DropFlowTaskDefaultTypeInternal _DropFlowTask_default_instance_;
 class DropTableTask;
 struct DropTableTaskDefaultTypeInternal;
 extern DropTableTaskDefaultTypeInternal _DropTableTask_default_instance_;
@@ -91,11 +97,13 @@ PROTOBUF_NAMESPACE_OPEN
 template<> ::greptime::v1::meta::AlterTableTask* Arena::CreateMaybeMessage<::greptime::v1::meta::AlterTableTask>(Arena*);
 template<> ::greptime::v1::meta::AlterTableTasks* Arena::CreateMaybeMessage<::greptime::v1::meta::AlterTableTasks>(Arena*);
 template<> ::greptime::v1::meta::CreateDatabaseTask* Arena::CreateMaybeMessage<::greptime::v1::meta::CreateDatabaseTask>(Arena*);
+template<> ::greptime::v1::meta::CreateFlowTask* Arena::CreateMaybeMessage<::greptime::v1::meta::CreateFlowTask>(Arena*);
 template<> ::greptime::v1::meta::CreateTableTask* Arena::CreateMaybeMessage<::greptime::v1::meta::CreateTableTask>(Arena*);
 template<> ::greptime::v1::meta::CreateTableTasks* Arena::CreateMaybeMessage<::greptime::v1::meta::CreateTableTasks>(Arena*);
 template<> ::greptime::v1::meta::DdlTaskRequest* Arena::CreateMaybeMessage<::greptime::v1::meta::DdlTaskRequest>(Arena*);
 template<> ::greptime::v1::meta::DdlTaskResponse* Arena::CreateMaybeMessage<::greptime::v1::meta::DdlTaskResponse>(Arena*);
 template<> ::greptime::v1::meta::DropDatabaseTask* Arena::CreateMaybeMessage<::greptime::v1::meta::DropDatabaseTask>(Arena*);
+template<> ::greptime::v1::meta::DropFlowTask* Arena::CreateMaybeMessage<::greptime::v1::meta::DropFlowTask>(Arena*);
 template<> ::greptime::v1::meta::DropTableTask* Arena::CreateMaybeMessage<::greptime::v1::meta::DropTableTask>(Arena*);
 template<> ::greptime::v1::meta::DropTableTasks* Arena::CreateMaybeMessage<::greptime::v1::meta::DropTableTasks>(Arena*);
 template<> ::greptime::v1::meta::TruncateTableTask* Arena::CreateMaybeMessage<::greptime::v1::meta::TruncateTableTask>(Arena*);
@@ -1580,6 +1588,320 @@ class DropDatabaseTask final :
 };
 // -------------------------------------------------------------------
 
+class CreateFlowTask final :
+    public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:greptime.v1.meta.CreateFlowTask) */ {
+ public:
+  inline CreateFlowTask() : CreateFlowTask(nullptr) {}
+  ~CreateFlowTask() override;
+  explicit PROTOBUF_CONSTEXPR CreateFlowTask(::PROTOBUF_NAMESPACE_ID::internal::ConstantInitialized);
+
+  CreateFlowTask(const CreateFlowTask& from);
+  CreateFlowTask(CreateFlowTask&& from) noexcept
+    : CreateFlowTask() {
+    *this = ::std::move(from);
+  }
+
+  inline CreateFlowTask& operator=(const CreateFlowTask& from) {
+    CopyFrom(from);
+    return *this;
+  }
+  inline CreateFlowTask& operator=(CreateFlowTask&& from) noexcept {
+    if (this == &from) return *this;
+    if (GetOwningArena() == from.GetOwningArena()
+  #ifdef PROTOBUF_FORCE_COPY_IN_MOVE
+        && GetOwningArena() != nullptr
+  #endif  // !PROTOBUF_FORCE_COPY_IN_MOVE
+    ) {
+      InternalSwap(&from);
+    } else {
+      CopyFrom(from);
+    }
+    return *this;
+  }
+
+  static const ::PROTOBUF_NAMESPACE_ID::Descriptor* descriptor() {
+    return GetDescriptor();
+  }
+  static const ::PROTOBUF_NAMESPACE_ID::Descriptor* GetDescriptor() {
+    return default_instance().GetMetadata().descriptor;
+  }
+  static const ::PROTOBUF_NAMESPACE_ID::Reflection* GetReflection() {
+    return default_instance().GetMetadata().reflection;
+  }
+  static const CreateFlowTask& default_instance() {
+    return *internal_default_instance();
+  }
+  static inline const CreateFlowTask* internal_default_instance() {
+    return reinterpret_cast<const CreateFlowTask*>(
+               &_CreateFlowTask_default_instance_);
+  }
+  static constexpr int kIndexInFileMessages =
+    9;
+
+  friend void swap(CreateFlowTask& a, CreateFlowTask& b) {
+    a.Swap(&b);
+  }
+  inline void Swap(CreateFlowTask* other) {
+    if (other == this) return;
+  #ifdef PROTOBUF_FORCE_COPY_IN_SWAP
+    if (GetOwningArena() != nullptr &&
+        GetOwningArena() == other->GetOwningArena()) {
+   #else  // PROTOBUF_FORCE_COPY_IN_SWAP
+    if (GetOwningArena() == other->GetOwningArena()) {
+  #endif  // !PROTOBUF_FORCE_COPY_IN_SWAP
+      InternalSwap(other);
+    } else {
+      ::PROTOBUF_NAMESPACE_ID::internal::GenericSwap(this, other);
+    }
+  }
+  void UnsafeArenaSwap(CreateFlowTask* other) {
+    if (other == this) return;
+    GOOGLE_DCHECK(GetOwningArena() == other->GetOwningArena());
+    InternalSwap(other);
+  }
+
+  // implements Message ----------------------------------------------
+
+  CreateFlowTask* New(::PROTOBUF_NAMESPACE_ID::Arena* arena = nullptr) const final {
+    return CreateMaybeMessage<CreateFlowTask>(arena);
+  }
+  using ::PROTOBUF_NAMESPACE_ID::Message::CopyFrom;
+  void CopyFrom(const CreateFlowTask& from);
+  using ::PROTOBUF_NAMESPACE_ID::Message::MergeFrom;
+  void MergeFrom( const CreateFlowTask& from) {
+    CreateFlowTask::MergeImpl(*this, from);
+  }
+  private:
+  static void MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::PROTOBUF_NAMESPACE_ID::Message& from_msg);
+  public:
+  PROTOBUF_ATTRIBUTE_REINITIALIZES void Clear() final;
+  bool IsInitialized() const final;
+
+  size_t ByteSizeLong() const final;
+  const char* _InternalParse(const char* ptr, ::PROTOBUF_NAMESPACE_ID::internal::ParseContext* ctx) final;
+  uint8_t* _InternalSerialize(
+      uint8_t* target, ::PROTOBUF_NAMESPACE_ID::io::EpsCopyOutputStream* stream) const final;
+  int GetCachedSize() const final { return _impl_._cached_size_.Get(); }
+
+  private:
+  void SharedCtor(::PROTOBUF_NAMESPACE_ID::Arena* arena, bool is_message_owned);
+  void SharedDtor();
+  void SetCachedSize(int size) const final;
+  void InternalSwap(CreateFlowTask* other);
+
+  private:
+  friend class ::PROTOBUF_NAMESPACE_ID::internal::AnyMetadata;
+  static ::PROTOBUF_NAMESPACE_ID::StringPiece FullMessageName() {
+    return "greptime.v1.meta.CreateFlowTask";
+  }
+  protected:
+  explicit CreateFlowTask(::PROTOBUF_NAMESPACE_ID::Arena* arena,
+                       bool is_message_owned = false);
+  public:
+
+  static const ClassData _class_data_;
+  const ::PROTOBUF_NAMESPACE_ID::Message::ClassData*GetClassData() const final;
+
+  ::PROTOBUF_NAMESPACE_ID::Metadata GetMetadata() const final;
+
+  // nested types ----------------------------------------------------
+
+  // accessors -------------------------------------------------------
+
+  enum : int {
+    kCreateFlowTaskFieldNumber = 1,
+  };
+  // .greptime.v1.CreateFlowTaskExpr create_flow_task = 1;
+  bool has_create_flow_task() const;
+  private:
+  bool _internal_has_create_flow_task() const;
+  public:
+  void clear_create_flow_task();
+  const ::greptime::v1::CreateFlowTaskExpr& create_flow_task() const;
+  PROTOBUF_NODISCARD ::greptime::v1::CreateFlowTaskExpr* release_create_flow_task();
+  ::greptime::v1::CreateFlowTaskExpr* mutable_create_flow_task();
+  void set_allocated_create_flow_task(::greptime::v1::CreateFlowTaskExpr* create_flow_task);
+  private:
+  const ::greptime::v1::CreateFlowTaskExpr& _internal_create_flow_task() const;
+  ::greptime::v1::CreateFlowTaskExpr* _internal_mutable_create_flow_task();
+  public:
+  void unsafe_arena_set_allocated_create_flow_task(
+      ::greptime::v1::CreateFlowTaskExpr* create_flow_task);
+  ::greptime::v1::CreateFlowTaskExpr* unsafe_arena_release_create_flow_task();
+
+  // @@protoc_insertion_point(class_scope:greptime.v1.meta.CreateFlowTask)
+ private:
+  class _Internal;
+
+  template <typename T> friend class ::PROTOBUF_NAMESPACE_ID::Arena::InternalHelper;
+  typedef void InternalArenaConstructable_;
+  typedef void DestructorSkippable_;
+  struct Impl_ {
+    ::greptime::v1::CreateFlowTaskExpr* create_flow_task_;
+    mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
+  };
+  union { Impl_ _impl_; };
+  friend struct ::TableStruct_greptime_2fv1_2fmeta_2fddl_2eproto;
+};
+// -------------------------------------------------------------------
+
+class DropFlowTask final :
+    public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:greptime.v1.meta.DropFlowTask) */ {
+ public:
+  inline DropFlowTask() : DropFlowTask(nullptr) {}
+  ~DropFlowTask() override;
+  explicit PROTOBUF_CONSTEXPR DropFlowTask(::PROTOBUF_NAMESPACE_ID::internal::ConstantInitialized);
+
+  DropFlowTask(const DropFlowTask& from);
+  DropFlowTask(DropFlowTask&& from) noexcept
+    : DropFlowTask() {
+    *this = ::std::move(from);
+  }
+
+  inline DropFlowTask& operator=(const DropFlowTask& from) {
+    CopyFrom(from);
+    return *this;
+  }
+  inline DropFlowTask& operator=(DropFlowTask&& from) noexcept {
+    if (this == &from) return *this;
+    if (GetOwningArena() == from.GetOwningArena()
+  #ifdef PROTOBUF_FORCE_COPY_IN_MOVE
+        && GetOwningArena() != nullptr
+  #endif  // !PROTOBUF_FORCE_COPY_IN_MOVE
+    ) {
+      InternalSwap(&from);
+    } else {
+      CopyFrom(from);
+    }
+    return *this;
+  }
+
+  static const ::PROTOBUF_NAMESPACE_ID::Descriptor* descriptor() {
+    return GetDescriptor();
+  }
+  static const ::PROTOBUF_NAMESPACE_ID::Descriptor* GetDescriptor() {
+    return default_instance().GetMetadata().descriptor;
+  }
+  static const ::PROTOBUF_NAMESPACE_ID::Reflection* GetReflection() {
+    return default_instance().GetMetadata().reflection;
+  }
+  static const DropFlowTask& default_instance() {
+    return *internal_default_instance();
+  }
+  static inline const DropFlowTask* internal_default_instance() {
+    return reinterpret_cast<const DropFlowTask*>(
+               &_DropFlowTask_default_instance_);
+  }
+  static constexpr int kIndexInFileMessages =
+    10;
+
+  friend void swap(DropFlowTask& a, DropFlowTask& b) {
+    a.Swap(&b);
+  }
+  inline void Swap(DropFlowTask* other) {
+    if (other == this) return;
+  #ifdef PROTOBUF_FORCE_COPY_IN_SWAP
+    if (GetOwningArena() != nullptr &&
+        GetOwningArena() == other->GetOwningArena()) {
+   #else  // PROTOBUF_FORCE_COPY_IN_SWAP
+    if (GetOwningArena() == other->GetOwningArena()) {
+  #endif  // !PROTOBUF_FORCE_COPY_IN_SWAP
+      InternalSwap(other);
+    } else {
+      ::PROTOBUF_NAMESPACE_ID::internal::GenericSwap(this, other);
+    }
+  }
+  void UnsafeArenaSwap(DropFlowTask* other) {
+    if (other == this) return;
+    GOOGLE_DCHECK(GetOwningArena() == other->GetOwningArena());
+    InternalSwap(other);
+  }
+
+  // implements Message ----------------------------------------------
+
+  DropFlowTask* New(::PROTOBUF_NAMESPACE_ID::Arena* arena = nullptr) const final {
+    return CreateMaybeMessage<DropFlowTask>(arena);
+  }
+  using ::PROTOBUF_NAMESPACE_ID::Message::CopyFrom;
+  void CopyFrom(const DropFlowTask& from);
+  using ::PROTOBUF_NAMESPACE_ID::Message::MergeFrom;
+  void MergeFrom( const DropFlowTask& from) {
+    DropFlowTask::MergeImpl(*this, from);
+  }
+  private:
+  static void MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::PROTOBUF_NAMESPACE_ID::Message& from_msg);
+  public:
+  PROTOBUF_ATTRIBUTE_REINITIALIZES void Clear() final;
+  bool IsInitialized() const final;
+
+  size_t ByteSizeLong() const final;
+  const char* _InternalParse(const char* ptr, ::PROTOBUF_NAMESPACE_ID::internal::ParseContext* ctx) final;
+  uint8_t* _InternalSerialize(
+      uint8_t* target, ::PROTOBUF_NAMESPACE_ID::io::EpsCopyOutputStream* stream) const final;
+  int GetCachedSize() const final { return _impl_._cached_size_.Get(); }
+
+  private:
+  void SharedCtor(::PROTOBUF_NAMESPACE_ID::Arena* arena, bool is_message_owned);
+  void SharedDtor();
+  void SetCachedSize(int size) const final;
+  void InternalSwap(DropFlowTask* other);
+
+  private:
+  friend class ::PROTOBUF_NAMESPACE_ID::internal::AnyMetadata;
+  static ::PROTOBUF_NAMESPACE_ID::StringPiece FullMessageName() {
+    return "greptime.v1.meta.DropFlowTask";
+  }
+  protected:
+  explicit DropFlowTask(::PROTOBUF_NAMESPACE_ID::Arena* arena,
+                       bool is_message_owned = false);
+  public:
+
+  static const ClassData _class_data_;
+  const ::PROTOBUF_NAMESPACE_ID::Message::ClassData*GetClassData() const final;
+
+  ::PROTOBUF_NAMESPACE_ID::Metadata GetMetadata() const final;
+
+  // nested types ----------------------------------------------------
+
+  // accessors -------------------------------------------------------
+
+  enum : int {
+    kDropFlowTaskFieldNumber = 1,
+  };
+  // .greptime.v1.DropFlowTaskExpr drop_flow_task = 1;
+  bool has_drop_flow_task() const;
+  private:
+  bool _internal_has_drop_flow_task() const;
+  public:
+  void clear_drop_flow_task();
+  const ::greptime::v1::DropFlowTaskExpr& drop_flow_task() const;
+  PROTOBUF_NODISCARD ::greptime::v1::DropFlowTaskExpr* release_drop_flow_task();
+  ::greptime::v1::DropFlowTaskExpr* mutable_drop_flow_task();
+  void set_allocated_drop_flow_task(::greptime::v1::DropFlowTaskExpr* drop_flow_task);
+  private:
+  const ::greptime::v1::DropFlowTaskExpr& _internal_drop_flow_task() const;
+  ::greptime::v1::DropFlowTaskExpr* _internal_mutable_drop_flow_task();
+  public:
+  void unsafe_arena_set_allocated_drop_flow_task(
+      ::greptime::v1::DropFlowTaskExpr* drop_flow_task);
+  ::greptime::v1::DropFlowTaskExpr* unsafe_arena_release_drop_flow_task();
+
+  // @@protoc_insertion_point(class_scope:greptime.v1.meta.DropFlowTask)
+ private:
+  class _Internal;
+
+  template <typename T> friend class ::PROTOBUF_NAMESPACE_ID::Arena::InternalHelper;
+  typedef void InternalArenaConstructable_;
+  typedef void DestructorSkippable_;
+  struct Impl_ {
+    ::greptime::v1::DropFlowTaskExpr* drop_flow_task_;
+    mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
+  };
+  union { Impl_ _impl_; };
+  friend struct ::TableStruct_greptime_2fv1_2fmeta_2fddl_2eproto;
+};
+// -------------------------------------------------------------------
+
 class DdlTaskRequest final :
     public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:greptime.v1.meta.DdlTaskRequest) */ {
  public:
@@ -1633,6 +1955,8 @@ class DdlTaskRequest final :
     kAlterTableTasks = 8,
     kDropDatabaseTask = 9,
     kCreateDatabaseTask = 10,
+    kCreateFlowTask = 11,
+    kDropFlowTask = 12,
     TASK_NOT_SET = 0,
   };
 
@@ -1641,7 +1965,7 @@ class DdlTaskRequest final :
                &_DdlTaskRequest_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    9;
+    11;
 
   friend void swap(DdlTaskRequest& a, DdlTaskRequest& b) {
     a.Swap(&b);
@@ -1724,6 +2048,8 @@ class DdlTaskRequest final :
     kAlterTableTasksFieldNumber = 8,
     kDropDatabaseTaskFieldNumber = 9,
     kCreateDatabaseTaskFieldNumber = 10,
+    kCreateFlowTaskFieldNumber = 11,
+    kDropFlowTaskFieldNumber = 12,
   };
   // .greptime.v1.meta.RequestHeader header = 1;
   bool has_header() const;
@@ -1905,6 +2231,42 @@ class DdlTaskRequest final :
       ::greptime::v1::meta::CreateDatabaseTask* create_database_task);
   ::greptime::v1::meta::CreateDatabaseTask* unsafe_arena_release_create_database_task();
 
+  // .greptime.v1.meta.CreateFlowTask create_flow_task = 11;
+  bool has_create_flow_task() const;
+  private:
+  bool _internal_has_create_flow_task() const;
+  public:
+  void clear_create_flow_task();
+  const ::greptime::v1::meta::CreateFlowTask& create_flow_task() const;
+  PROTOBUF_NODISCARD ::greptime::v1::meta::CreateFlowTask* release_create_flow_task();
+  ::greptime::v1::meta::CreateFlowTask* mutable_create_flow_task();
+  void set_allocated_create_flow_task(::greptime::v1::meta::CreateFlowTask* create_flow_task);
+  private:
+  const ::greptime::v1::meta::CreateFlowTask& _internal_create_flow_task() const;
+  ::greptime::v1::meta::CreateFlowTask* _internal_mutable_create_flow_task();
+  public:
+  void unsafe_arena_set_allocated_create_flow_task(
+      ::greptime::v1::meta::CreateFlowTask* create_flow_task);
+  ::greptime::v1::meta::CreateFlowTask* unsafe_arena_release_create_flow_task();
+
+  // .greptime.v1.meta.DropFlowTask drop_flow_task = 12;
+  bool has_drop_flow_task() const;
+  private:
+  bool _internal_has_drop_flow_task() const;
+  public:
+  void clear_drop_flow_task();
+  const ::greptime::v1::meta::DropFlowTask& drop_flow_task() const;
+  PROTOBUF_NODISCARD ::greptime::v1::meta::DropFlowTask* release_drop_flow_task();
+  ::greptime::v1::meta::DropFlowTask* mutable_drop_flow_task();
+  void set_allocated_drop_flow_task(::greptime::v1::meta::DropFlowTask* drop_flow_task);
+  private:
+  const ::greptime::v1::meta::DropFlowTask& _internal_drop_flow_task() const;
+  ::greptime::v1::meta::DropFlowTask* _internal_mutable_drop_flow_task();
+  public:
+  void unsafe_arena_set_allocated_drop_flow_task(
+      ::greptime::v1::meta::DropFlowTask* drop_flow_task);
+  ::greptime::v1::meta::DropFlowTask* unsafe_arena_release_drop_flow_task();
+
   void clear_task();
   TaskCase task_case() const;
   // @@protoc_insertion_point(class_scope:greptime.v1.meta.DdlTaskRequest)
@@ -1919,6 +2281,8 @@ class DdlTaskRequest final :
   void set_has_alter_table_tasks();
   void set_has_drop_database_task();
   void set_has_create_database_task();
+  void set_has_create_flow_task();
+  void set_has_drop_flow_task();
 
   inline bool has_task() const;
   inline void clear_has_task();
@@ -1940,6 +2304,8 @@ class DdlTaskRequest final :
       ::greptime::v1::meta::AlterTableTasks* alter_table_tasks_;
       ::greptime::v1::meta::DropDatabaseTask* drop_database_task_;
       ::greptime::v1::meta::CreateDatabaseTask* create_database_task_;
+      ::greptime::v1::meta::CreateFlowTask* create_flow_task_;
+      ::greptime::v1::meta::DropFlowTask* drop_flow_task_;
     } task_;
     mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
     uint32_t _oneof_case_[1];
@@ -1998,7 +2364,7 @@ class DdlTaskResponse final :
                &_DdlTaskResponse_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    10;
+    12;
 
   friend void swap(DdlTaskResponse& a, DdlTaskResponse& b) {
     a.Swap(&b);
@@ -2927,6 +3293,184 @@ inline void DropDatabaseTask::set_allocated_drop_database(::greptime::v1::DropDa
 
 // -------------------------------------------------------------------
 
+// CreateFlowTask
+
+// .greptime.v1.CreateFlowTaskExpr create_flow_task = 1;
+inline bool CreateFlowTask::_internal_has_create_flow_task() const {
+  return this != internal_default_instance() && _impl_.create_flow_task_ != nullptr;
+}
+inline bool CreateFlowTask::has_create_flow_task() const {
+  return _internal_has_create_flow_task();
+}
+inline const ::greptime::v1::CreateFlowTaskExpr& CreateFlowTask::_internal_create_flow_task() const {
+  const ::greptime::v1::CreateFlowTaskExpr* p = _impl_.create_flow_task_;
+  return p != nullptr ? *p : reinterpret_cast<const ::greptime::v1::CreateFlowTaskExpr&>(
+      ::greptime::v1::_CreateFlowTaskExpr_default_instance_);
+}
+inline const ::greptime::v1::CreateFlowTaskExpr& CreateFlowTask::create_flow_task() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.meta.CreateFlowTask.create_flow_task)
+  return _internal_create_flow_task();
+}
+inline void CreateFlowTask::unsafe_arena_set_allocated_create_flow_task(
+    ::greptime::v1::CreateFlowTaskExpr* create_flow_task) {
+  if (GetArenaForAllocation() == nullptr) {
+    delete reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(_impl_.create_flow_task_);
+  }
+  _impl_.create_flow_task_ = create_flow_task;
+  if (create_flow_task) {
+    
+  } else {
+    
+  }
+  // @@protoc_insertion_point(field_unsafe_arena_set_allocated:greptime.v1.meta.CreateFlowTask.create_flow_task)
+}
+inline ::greptime::v1::CreateFlowTaskExpr* CreateFlowTask::release_create_flow_task() {
+  
+  ::greptime::v1::CreateFlowTaskExpr* temp = _impl_.create_flow_task_;
+  _impl_.create_flow_task_ = nullptr;
+#ifdef PROTOBUF_FORCE_COPY_IN_RELEASE
+  auto* old =  reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(temp);
+  temp = ::PROTOBUF_NAMESPACE_ID::internal::DuplicateIfNonNull(temp);
+  if (GetArenaForAllocation() == nullptr) { delete old; }
+#else  // PROTOBUF_FORCE_COPY_IN_RELEASE
+  if (GetArenaForAllocation() != nullptr) {
+    temp = ::PROTOBUF_NAMESPACE_ID::internal::DuplicateIfNonNull(temp);
+  }
+#endif  // !PROTOBUF_FORCE_COPY_IN_RELEASE
+  return temp;
+}
+inline ::greptime::v1::CreateFlowTaskExpr* CreateFlowTask::unsafe_arena_release_create_flow_task() {
+  // @@protoc_insertion_point(field_release:greptime.v1.meta.CreateFlowTask.create_flow_task)
+  
+  ::greptime::v1::CreateFlowTaskExpr* temp = _impl_.create_flow_task_;
+  _impl_.create_flow_task_ = nullptr;
+  return temp;
+}
+inline ::greptime::v1::CreateFlowTaskExpr* CreateFlowTask::_internal_mutable_create_flow_task() {
+  
+  if (_impl_.create_flow_task_ == nullptr) {
+    auto* p = CreateMaybeMessage<::greptime::v1::CreateFlowTaskExpr>(GetArenaForAllocation());
+    _impl_.create_flow_task_ = p;
+  }
+  return _impl_.create_flow_task_;
+}
+inline ::greptime::v1::CreateFlowTaskExpr* CreateFlowTask::mutable_create_flow_task() {
+  ::greptime::v1::CreateFlowTaskExpr* _msg = _internal_mutable_create_flow_task();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.meta.CreateFlowTask.create_flow_task)
+  return _msg;
+}
+inline void CreateFlowTask::set_allocated_create_flow_task(::greptime::v1::CreateFlowTaskExpr* create_flow_task) {
+  ::PROTOBUF_NAMESPACE_ID::Arena* message_arena = GetArenaForAllocation();
+  if (message_arena == nullptr) {
+    delete reinterpret_cast< ::PROTOBUF_NAMESPACE_ID::MessageLite*>(_impl_.create_flow_task_);
+  }
+  if (create_flow_task) {
+    ::PROTOBUF_NAMESPACE_ID::Arena* submessage_arena =
+        ::PROTOBUF_NAMESPACE_ID::Arena::InternalGetOwningArena(
+                reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(create_flow_task));
+    if (message_arena != submessage_arena) {
+      create_flow_task = ::PROTOBUF_NAMESPACE_ID::internal::GetOwnedMessage(
+          message_arena, create_flow_task, submessage_arena);
+    }
+    
+  } else {
+    
+  }
+  _impl_.create_flow_task_ = create_flow_task;
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.meta.CreateFlowTask.create_flow_task)
+}
+
+// -------------------------------------------------------------------
+
+// DropFlowTask
+
+// .greptime.v1.DropFlowTaskExpr drop_flow_task = 1;
+inline bool DropFlowTask::_internal_has_drop_flow_task() const {
+  return this != internal_default_instance() && _impl_.drop_flow_task_ != nullptr;
+}
+inline bool DropFlowTask::has_drop_flow_task() const {
+  return _internal_has_drop_flow_task();
+}
+inline const ::greptime::v1::DropFlowTaskExpr& DropFlowTask::_internal_drop_flow_task() const {
+  const ::greptime::v1::DropFlowTaskExpr* p = _impl_.drop_flow_task_;
+  return p != nullptr ? *p : reinterpret_cast<const ::greptime::v1::DropFlowTaskExpr&>(
+      ::greptime::v1::_DropFlowTaskExpr_default_instance_);
+}
+inline const ::greptime::v1::DropFlowTaskExpr& DropFlowTask::drop_flow_task() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.meta.DropFlowTask.drop_flow_task)
+  return _internal_drop_flow_task();
+}
+inline void DropFlowTask::unsafe_arena_set_allocated_drop_flow_task(
+    ::greptime::v1::DropFlowTaskExpr* drop_flow_task) {
+  if (GetArenaForAllocation() == nullptr) {
+    delete reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(_impl_.drop_flow_task_);
+  }
+  _impl_.drop_flow_task_ = drop_flow_task;
+  if (drop_flow_task) {
+    
+  } else {
+    
+  }
+  // @@protoc_insertion_point(field_unsafe_arena_set_allocated:greptime.v1.meta.DropFlowTask.drop_flow_task)
+}
+inline ::greptime::v1::DropFlowTaskExpr* DropFlowTask::release_drop_flow_task() {
+  
+  ::greptime::v1::DropFlowTaskExpr* temp = _impl_.drop_flow_task_;
+  _impl_.drop_flow_task_ = nullptr;
+#ifdef PROTOBUF_FORCE_COPY_IN_RELEASE
+  auto* old =  reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(temp);
+  temp = ::PROTOBUF_NAMESPACE_ID::internal::DuplicateIfNonNull(temp);
+  if (GetArenaForAllocation() == nullptr) { delete old; }
+#else  // PROTOBUF_FORCE_COPY_IN_RELEASE
+  if (GetArenaForAllocation() != nullptr) {
+    temp = ::PROTOBUF_NAMESPACE_ID::internal::DuplicateIfNonNull(temp);
+  }
+#endif  // !PROTOBUF_FORCE_COPY_IN_RELEASE
+  return temp;
+}
+inline ::greptime::v1::DropFlowTaskExpr* DropFlowTask::unsafe_arena_release_drop_flow_task() {
+  // @@protoc_insertion_point(field_release:greptime.v1.meta.DropFlowTask.drop_flow_task)
+  
+  ::greptime::v1::DropFlowTaskExpr* temp = _impl_.drop_flow_task_;
+  _impl_.drop_flow_task_ = nullptr;
+  return temp;
+}
+inline ::greptime::v1::DropFlowTaskExpr* DropFlowTask::_internal_mutable_drop_flow_task() {
+  
+  if (_impl_.drop_flow_task_ == nullptr) {
+    auto* p = CreateMaybeMessage<::greptime::v1::DropFlowTaskExpr>(GetArenaForAllocation());
+    _impl_.drop_flow_task_ = p;
+  }
+  return _impl_.drop_flow_task_;
+}
+inline ::greptime::v1::DropFlowTaskExpr* DropFlowTask::mutable_drop_flow_task() {
+  ::greptime::v1::DropFlowTaskExpr* _msg = _internal_mutable_drop_flow_task();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.meta.DropFlowTask.drop_flow_task)
+  return _msg;
+}
+inline void DropFlowTask::set_allocated_drop_flow_task(::greptime::v1::DropFlowTaskExpr* drop_flow_task) {
+  ::PROTOBUF_NAMESPACE_ID::Arena* message_arena = GetArenaForAllocation();
+  if (message_arena == nullptr) {
+    delete reinterpret_cast< ::PROTOBUF_NAMESPACE_ID::MessageLite*>(_impl_.drop_flow_task_);
+  }
+  if (drop_flow_task) {
+    ::PROTOBUF_NAMESPACE_ID::Arena* submessage_arena =
+        ::PROTOBUF_NAMESPACE_ID::Arena::InternalGetOwningArena(
+                reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(drop_flow_task));
+    if (message_arena != submessage_arena) {
+      drop_flow_task = ::PROTOBUF_NAMESPACE_ID::internal::GetOwnedMessage(
+          message_arena, drop_flow_task, submessage_arena);
+    }
+    
+  } else {
+    
+  }
+  _impl_.drop_flow_task_ = drop_flow_task;
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.meta.DropFlowTask.drop_flow_task)
+}
+
+// -------------------------------------------------------------------
+
 // DdlTaskRequest
 
 // .greptime.v1.meta.RequestHeader header = 1;
@@ -3680,6 +4224,154 @@ inline ::greptime::v1::meta::CreateDatabaseTask* DdlTaskRequest::mutable_create_
   return _msg;
 }
 
+// .greptime.v1.meta.CreateFlowTask create_flow_task = 11;
+inline bool DdlTaskRequest::_internal_has_create_flow_task() const {
+  return task_case() == kCreateFlowTask;
+}
+inline bool DdlTaskRequest::has_create_flow_task() const {
+  return _internal_has_create_flow_task();
+}
+inline void DdlTaskRequest::set_has_create_flow_task() {
+  _impl_._oneof_case_[0] = kCreateFlowTask;
+}
+inline void DdlTaskRequest::clear_create_flow_task() {
+  if (_internal_has_create_flow_task()) {
+    if (GetArenaForAllocation() == nullptr) {
+      delete _impl_.task_.create_flow_task_;
+    }
+    clear_has_task();
+  }
+}
+inline ::greptime::v1::meta::CreateFlowTask* DdlTaskRequest::release_create_flow_task() {
+  // @@protoc_insertion_point(field_release:greptime.v1.meta.DdlTaskRequest.create_flow_task)
+  if (_internal_has_create_flow_task()) {
+    clear_has_task();
+    ::greptime::v1::meta::CreateFlowTask* temp = _impl_.task_.create_flow_task_;
+    if (GetArenaForAllocation() != nullptr) {
+      temp = ::PROTOBUF_NAMESPACE_ID::internal::DuplicateIfNonNull(temp);
+    }
+    _impl_.task_.create_flow_task_ = nullptr;
+    return temp;
+  } else {
+    return nullptr;
+  }
+}
+inline const ::greptime::v1::meta::CreateFlowTask& DdlTaskRequest::_internal_create_flow_task() const {
+  return _internal_has_create_flow_task()
+      ? *_impl_.task_.create_flow_task_
+      : reinterpret_cast< ::greptime::v1::meta::CreateFlowTask&>(::greptime::v1::meta::_CreateFlowTask_default_instance_);
+}
+inline const ::greptime::v1::meta::CreateFlowTask& DdlTaskRequest::create_flow_task() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.meta.DdlTaskRequest.create_flow_task)
+  return _internal_create_flow_task();
+}
+inline ::greptime::v1::meta::CreateFlowTask* DdlTaskRequest::unsafe_arena_release_create_flow_task() {
+  // @@protoc_insertion_point(field_unsafe_arena_release:greptime.v1.meta.DdlTaskRequest.create_flow_task)
+  if (_internal_has_create_flow_task()) {
+    clear_has_task();
+    ::greptime::v1::meta::CreateFlowTask* temp = _impl_.task_.create_flow_task_;
+    _impl_.task_.create_flow_task_ = nullptr;
+    return temp;
+  } else {
+    return nullptr;
+  }
+}
+inline void DdlTaskRequest::unsafe_arena_set_allocated_create_flow_task(::greptime::v1::meta::CreateFlowTask* create_flow_task) {
+  clear_task();
+  if (create_flow_task) {
+    set_has_create_flow_task();
+    _impl_.task_.create_flow_task_ = create_flow_task;
+  }
+  // @@protoc_insertion_point(field_unsafe_arena_set_allocated:greptime.v1.meta.DdlTaskRequest.create_flow_task)
+}
+inline ::greptime::v1::meta::CreateFlowTask* DdlTaskRequest::_internal_mutable_create_flow_task() {
+  if (!_internal_has_create_flow_task()) {
+    clear_task();
+    set_has_create_flow_task();
+    _impl_.task_.create_flow_task_ = CreateMaybeMessage< ::greptime::v1::meta::CreateFlowTask >(GetArenaForAllocation());
+  }
+  return _impl_.task_.create_flow_task_;
+}
+inline ::greptime::v1::meta::CreateFlowTask* DdlTaskRequest::mutable_create_flow_task() {
+  ::greptime::v1::meta::CreateFlowTask* _msg = _internal_mutable_create_flow_task();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.meta.DdlTaskRequest.create_flow_task)
+  return _msg;
+}
+
+// .greptime.v1.meta.DropFlowTask drop_flow_task = 12;
+inline bool DdlTaskRequest::_internal_has_drop_flow_task() const {
+  return task_case() == kDropFlowTask;
+}
+inline bool DdlTaskRequest::has_drop_flow_task() const {
+  return _internal_has_drop_flow_task();
+}
+inline void DdlTaskRequest::set_has_drop_flow_task() {
+  _impl_._oneof_case_[0] = kDropFlowTask;
+}
+inline void DdlTaskRequest::clear_drop_flow_task() {
+  if (_internal_has_drop_flow_task()) {
+    if (GetArenaForAllocation() == nullptr) {
+      delete _impl_.task_.drop_flow_task_;
+    }
+    clear_has_task();
+  }
+}
+inline ::greptime::v1::meta::DropFlowTask* DdlTaskRequest::release_drop_flow_task() {
+  // @@protoc_insertion_point(field_release:greptime.v1.meta.DdlTaskRequest.drop_flow_task)
+  if (_internal_has_drop_flow_task()) {
+    clear_has_task();
+    ::greptime::v1::meta::DropFlowTask* temp = _impl_.task_.drop_flow_task_;
+    if (GetArenaForAllocation() != nullptr) {
+      temp = ::PROTOBUF_NAMESPACE_ID::internal::DuplicateIfNonNull(temp);
+    }
+    _impl_.task_.drop_flow_task_ = nullptr;
+    return temp;
+  } else {
+    return nullptr;
+  }
+}
+inline const ::greptime::v1::meta::DropFlowTask& DdlTaskRequest::_internal_drop_flow_task() const {
+  return _internal_has_drop_flow_task()
+      ? *_impl_.task_.drop_flow_task_
+      : reinterpret_cast< ::greptime::v1::meta::DropFlowTask&>(::greptime::v1::meta::_DropFlowTask_default_instance_);
+}
+inline const ::greptime::v1::meta::DropFlowTask& DdlTaskRequest::drop_flow_task() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.meta.DdlTaskRequest.drop_flow_task)
+  return _internal_drop_flow_task();
+}
+inline ::greptime::v1::meta::DropFlowTask* DdlTaskRequest::unsafe_arena_release_drop_flow_task() {
+  // @@protoc_insertion_point(field_unsafe_arena_release:greptime.v1.meta.DdlTaskRequest.drop_flow_task)
+  if (_internal_has_drop_flow_task()) {
+    clear_has_task();
+    ::greptime::v1::meta::DropFlowTask* temp = _impl_.task_.drop_flow_task_;
+    _impl_.task_.drop_flow_task_ = nullptr;
+    return temp;
+  } else {
+    return nullptr;
+  }
+}
+inline void DdlTaskRequest::unsafe_arena_set_allocated_drop_flow_task(::greptime::v1::meta::DropFlowTask* drop_flow_task) {
+  clear_task();
+  if (drop_flow_task) {
+    set_has_drop_flow_task();
+    _impl_.task_.drop_flow_task_ = drop_flow_task;
+  }
+  // @@protoc_insertion_point(field_unsafe_arena_set_allocated:greptime.v1.meta.DdlTaskRequest.drop_flow_task)
+}
+inline ::greptime::v1::meta::DropFlowTask* DdlTaskRequest::_internal_mutable_drop_flow_task() {
+  if (!_internal_has_drop_flow_task()) {
+    clear_task();
+    set_has_drop_flow_task();
+    _impl_.task_.drop_flow_task_ = CreateMaybeMessage< ::greptime::v1::meta::DropFlowTask >(GetArenaForAllocation());
+  }
+  return _impl_.task_.drop_flow_task_;
+}
+inline ::greptime::v1::meta::DropFlowTask* DdlTaskRequest::mutable_drop_flow_task() {
+  ::greptime::v1::meta::DropFlowTask* _msg = _internal_mutable_drop_flow_task();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.meta.DdlTaskRequest.drop_flow_task)
+  return _msg;
+}
+
 inline bool DdlTaskRequest::has_task() const {
   return task_case() != TASK_NOT_SET;
 }
@@ -4008,6 +4700,10 @@ DdlTaskResponse::table_ids() const {
 
 // -------------------------------------------------------------------
 
+// -------------------------------------------------------------------
+
+// -------------------------------------------------------------------
+
 
 // @@protoc_insertion_point(namespace_scope)
 

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

@@ -520,6 +520,100 @@ func (x *DropDatabaseTask) GetDropDatabase() *v1.DropDatabaseExpr {
 	return nil
 }
 
+type CreateFlowTask struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	CreateFlowTask *v1.CreateFlowTaskExpr `protobuf:"bytes,1,opt,name=create_flow_task,json=createFlowTask,proto3" json:"create_flow_task,omitempty"`
+}
+
+func (x *CreateFlowTask) Reset() {
+	*x = CreateFlowTask{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[9]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CreateFlowTask) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CreateFlowTask) ProtoMessage() {}
+
+func (x *CreateFlowTask) ProtoReflect() protoreflect.Message {
+	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[9]
+	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 CreateFlowTask.ProtoReflect.Descriptor instead.
+func (*CreateFlowTask) Descriptor() ([]byte, []int) {
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{9}
+}
+
+func (x *CreateFlowTask) GetCreateFlowTask() *v1.CreateFlowTaskExpr {
+	if x != nil {
+		return x.CreateFlowTask
+	}
+	return nil
+}
+
+type DropFlowTask struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	DropFlowTask *v1.DropFlowTaskExpr `protobuf:"bytes,1,opt,name=drop_flow_task,json=dropFlowTask,proto3" json:"drop_flow_task,omitempty"`
+}
+
+func (x *DropFlowTask) Reset() {
+	*x = DropFlowTask{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[10]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *DropFlowTask) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*DropFlowTask) ProtoMessage() {}
+
+func (x *DropFlowTask) ProtoReflect() protoreflect.Message {
+	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[10]
+	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 DropFlowTask.ProtoReflect.Descriptor instead.
+func (*DropFlowTask) Descriptor() ([]byte, []int) {
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{10}
+}
+
+func (x *DropFlowTask) GetDropFlowTask() *v1.DropFlowTaskExpr {
+	if x != nil {
+		return x.DropFlowTask
+	}
+	return nil
+}
+
 type DdlTaskRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -537,13 +631,15 @@ type DdlTaskRequest struct {
 	//	*DdlTaskRequest_AlterTableTasks
 	//	*DdlTaskRequest_DropDatabaseTask
 	//	*DdlTaskRequest_CreateDatabaseTask
+	//	*DdlTaskRequest_CreateFlowTask
+	//	*DdlTaskRequest_DropFlowTask
 	Task isDdlTaskRequest_Task `protobuf_oneof:"task"`
 }
 
 func (x *DdlTaskRequest) Reset() {
 	*x = DdlTaskRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[9]
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[11]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -556,7 +652,7 @@ func (x *DdlTaskRequest) String() string {
 func (*DdlTaskRequest) ProtoMessage() {}
 
 func (x *DdlTaskRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[9]
+	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[11]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -569,7 +665,7 @@ func (x *DdlTaskRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DdlTaskRequest.ProtoReflect.Descriptor instead.
 func (*DdlTaskRequest) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{9}
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{11}
 }
 
 func (x *DdlTaskRequest) GetHeader() *RequestHeader {
@@ -649,6 +745,20 @@ func (x *DdlTaskRequest) GetCreateDatabaseTask() *CreateDatabaseTask {
 	return nil
 }
 
+func (x *DdlTaskRequest) GetCreateFlowTask() *CreateFlowTask {
+	if x, ok := x.GetTask().(*DdlTaskRequest_CreateFlowTask); ok {
+		return x.CreateFlowTask
+	}
+	return nil
+}
+
+func (x *DdlTaskRequest) GetDropFlowTask() *DropFlowTask {
+	if x, ok := x.GetTask().(*DdlTaskRequest_DropFlowTask); ok {
+		return x.DropFlowTask
+	}
+	return nil
+}
+
 type isDdlTaskRequest_Task interface {
 	isDdlTaskRequest_Task()
 }
@@ -689,6 +799,14 @@ type DdlTaskRequest_CreateDatabaseTask struct {
 	CreateDatabaseTask *CreateDatabaseTask `protobuf:"bytes,10,opt,name=create_database_task,json=createDatabaseTask,proto3,oneof"`
 }
 
+type DdlTaskRequest_CreateFlowTask struct {
+	CreateFlowTask *CreateFlowTask `protobuf:"bytes,11,opt,name=create_flow_task,json=createFlowTask,proto3,oneof"`
+}
+
+type DdlTaskRequest_DropFlowTask struct {
+	DropFlowTask *DropFlowTask `protobuf:"bytes,12,opt,name=drop_flow_task,json=dropFlowTask,proto3,oneof"`
+}
+
 func (*DdlTaskRequest_CreateTableTask) isDdlTaskRequest_Task() {}
 
 func (*DdlTaskRequest_DropTableTask) isDdlTaskRequest_Task() {}
@@ -707,6 +825,10 @@ func (*DdlTaskRequest_DropDatabaseTask) isDdlTaskRequest_Task() {}
 
 func (*DdlTaskRequest_CreateDatabaseTask) isDdlTaskRequest_Task() {}
 
+func (*DdlTaskRequest_CreateFlowTask) isDdlTaskRequest_Task() {}
+
+func (*DdlTaskRequest_DropFlowTask) isDdlTaskRequest_Task() {}
+
 type DdlTaskResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -724,7 +846,7 @@ type DdlTaskResponse struct {
 func (x *DdlTaskResponse) Reset() {
 	*x = DdlTaskResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[10]
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[12]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -737,7 +859,7 @@ func (x *DdlTaskResponse) String() string {
 func (*DdlTaskResponse) ProtoMessage() {}
 
 func (x *DdlTaskResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[10]
+	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[12]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -750,7 +872,7 @@ func (x *DdlTaskResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DdlTaskResponse.ProtoReflect.Descriptor instead.
 func (*DdlTaskResponse) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{10}
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{12}
 }
 
 func (x *DdlTaskResponse) GetHeader() *ResponseHeader {
@@ -844,79 +966,100 @@ var file_greptime_v1_meta_ddl_proto_rawDesc = []byte{
 	0x28, 0x0b, 0x32, 0x1d, 0x2e, 0x67, 0x72, 0x65, 0x70, 0x74, 0x69, 0x6d, 0x65, 0x2e, 0x76, 0x31,
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+	0x69, 0x64, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x1d, 0x2e, 0x67, 0x72, 0x65, 0x70, 0x74,
+	0x69, 0x6d, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x6d, 0x65, 0x74, 0x61, 0x2e, 0x50, 0x72, 0x6f, 0x63,
+	0x65, 0x64, 0x75, 0x72, 0x65, 0x49, 0x64, 0x52, 0x03, 0x70, 0x69, 0x64, 0x12, 0x34, 0x0a, 0x08,
+	0x74, 0x61, 0x62, 0x6c, 0x65, 0x5f, 0x69, 0x64, 0x18, 0x04, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x19,
+	0x2e, 0x67, 0x72, 0x65, 0x70, 0x74, 0x69, 0x6d, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x6d, 0x65, 0x74,
+	0x61, 0x2e, 0x54, 0x61, 0x62, 0x6c, 0x65, 0x49, 0x64, 0x52, 0x07, 0x74, 0x61, 0x62, 0x6c, 0x65,
+	0x49, 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, 0x76, 0x31, 0x2e, 0x6d, 0x65, 0x74, 0x61, 0x2e, 0x54, 0x61, 0x62, 0x6c, 0x65, 0x49, 0x64,
+	0x52, 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, 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 (
@@ -932,7 +1075,7 @@ 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, 11)
+var file_greptime_v1_meta_ddl_proto_msgTypes = make([]protoimpl.MessageInfo, 13)
 var file_greptime_v1_meta_ddl_proto_goTypes = []interface{}{
 	(DdlTaskType)(0),              // 0: greptime.v1.meta.DdlTaskType
 	(*CreateDatabaseTask)(nil),    // 1: greptime.v1.meta.CreateDatabaseTask
@@ -944,50 +1087,58 @@ var file_greptime_v1_meta_ddl_proto_goTypes = []interface{}{
 	(*AlterTableTasks)(nil),       // 7: greptime.v1.meta.AlterTableTasks
 	(*TruncateTableTask)(nil),     // 8: greptime.v1.meta.TruncateTableTask
 	(*DropDatabaseTask)(nil),      // 9: greptime.v1.meta.DropDatabaseTask
-	(*DdlTaskRequest)(nil),        // 10: greptime.v1.meta.DdlTaskRequest
+	(*CreateFlowTask)(nil),        // 10: greptime.v1.meta.CreateFlowTask
-	(*DdlTaskResponse)(nil),       // 11: greptime.v1.meta.DdlTaskResponse
+	(*DropFlowTask)(nil),          // 11: greptime.v1.meta.DropFlowTask
-	(*v1.CreateDatabaseExpr)(nil), // 12: greptime.v1.CreateDatabaseExpr
+	(*DdlTaskRequest)(nil),        // 12: greptime.v1.meta.DdlTaskRequest
-	(*v1.CreateTableExpr)(nil),    // 13: greptime.v1.CreateTableExpr
+	(*DdlTaskResponse)(nil),       // 13: greptime.v1.meta.DdlTaskResponse
-	(*Partition)(nil),             // 14: greptime.v1.meta.Partition
+	(*v1.CreateDatabaseExpr)(nil), // 14: greptime.v1.CreateDatabaseExpr
-	(*v1.DropTableExpr)(nil),      // 15: greptime.v1.DropTableExpr
+	(*v1.CreateTableExpr)(nil),    // 15: greptime.v1.CreateTableExpr
-	(*v1.AlterExpr)(nil),          // 16: greptime.v1.AlterExpr
+	(*Partition)(nil),             // 16: greptime.v1.meta.Partition
-	(*v1.TruncateTableExpr)(nil),  // 17: greptime.v1.TruncateTableExpr
+	(*v1.DropTableExpr)(nil),      // 17: greptime.v1.DropTableExpr
-	(*v1.DropDatabaseExpr)(nil),   // 18: greptime.v1.DropDatabaseExpr
+	(*v1.AlterExpr)(nil),          // 18: greptime.v1.AlterExpr
-	(*RequestHeader)(nil),         // 19: greptime.v1.meta.RequestHeader
+	(*v1.TruncateTableExpr)(nil),  // 19: greptime.v1.TruncateTableExpr
-	(*ResponseHeader)(nil),        // 20: greptime.v1.meta.ResponseHeader
+	(*v1.DropDatabaseExpr)(nil),   // 20: greptime.v1.DropDatabaseExpr
-	(*ProcedureId)(nil),           // 21: greptime.v1.meta.ProcedureId
+	(*v1.CreateFlowTaskExpr)(nil), // 21: greptime.v1.CreateFlowTaskExpr
-	(*TableId)(nil),               // 22: greptime.v1.meta.TableId
+	(*v1.DropFlowTaskExpr)(nil),   // 22: greptime.v1.DropFlowTaskExpr
+	(*RequestHeader)(nil),         // 23: greptime.v1.meta.RequestHeader
+	(*ResponseHeader)(nil),        // 24: greptime.v1.meta.ResponseHeader
+	(*ProcedureId)(nil),           // 25: greptime.v1.meta.ProcedureId
+	(*TableId)(nil),               // 26: greptime.v1.meta.TableId
 }
 var file_greptime_v1_meta_ddl_proto_depIdxs = []int32{
-	12, // 0: greptime.v1.meta.CreateDatabaseTask.create_database:type_name -> greptime.v1.CreateDatabaseExpr
+	14, // 0: greptime.v1.meta.CreateDatabaseTask.create_database:type_name -> greptime.v1.CreateDatabaseExpr
-	13, // 1: greptime.v1.meta.CreateTableTask.create_table:type_name -> greptime.v1.CreateTableExpr
+	15, // 1: greptime.v1.meta.CreateTableTask.create_table:type_name -> greptime.v1.CreateTableExpr
-	14, // 2: greptime.v1.meta.CreateTableTask.partitions:type_name -> greptime.v1.meta.Partition
+	16, // 2: greptime.v1.meta.CreateTableTask.partitions:type_name -> greptime.v1.meta.Partition
 	2,  // 3: greptime.v1.meta.CreateTableTasks.tasks:type_name -> greptime.v1.meta.CreateTableTask
-	15, // 4: greptime.v1.meta.DropTableTask.drop_table:type_name -> greptime.v1.DropTableExpr
+	17, // 4: greptime.v1.meta.DropTableTask.drop_table:type_name -> greptime.v1.DropTableExpr
 	4,  // 5: greptime.v1.meta.DropTableTasks.tasks:type_name -> greptime.v1.meta.DropTableTask
-	16, // 6: greptime.v1.meta.AlterTableTask.alter_table:type_name -> greptime.v1.AlterExpr
+	18, // 6: greptime.v1.meta.AlterTableTask.alter_table:type_name -> greptime.v1.AlterExpr
 	6,  // 7: greptime.v1.meta.AlterTableTasks.tasks:type_name -> greptime.v1.meta.AlterTableTask
-	17, // 8: greptime.v1.meta.TruncateTableTask.truncate_table:type_name -> greptime.v1.TruncateTableExpr
+	19, // 8: greptime.v1.meta.TruncateTableTask.truncate_table:type_name -> greptime.v1.TruncateTableExpr
-	18, // 9: greptime.v1.meta.DropDatabaseTask.drop_database:type_name -> greptime.v1.DropDatabaseExpr
+	20, // 9: greptime.v1.meta.DropDatabaseTask.drop_database:type_name -> greptime.v1.DropDatabaseExpr
-	19, // 10: greptime.v1.meta.DdlTaskRequest.header:type_name -> greptime.v1.meta.RequestHeader
+	21, // 10: greptime.v1.meta.CreateFlowTask.create_flow_task:type_name -> greptime.v1.CreateFlowTaskExpr
-	2,  // 11: greptime.v1.meta.DdlTaskRequest.create_table_task:type_name -> greptime.v1.meta.CreateTableTask
+	22, // 11: greptime.v1.meta.DropFlowTask.drop_flow_task:type_name -> greptime.v1.DropFlowTaskExpr
-	4,  // 12: greptime.v1.meta.DdlTaskRequest.drop_table_task:type_name -> greptime.v1.meta.DropTableTask
+	23, // 12: greptime.v1.meta.DdlTaskRequest.header:type_name -> greptime.v1.meta.RequestHeader
-	6,  // 13: greptime.v1.meta.DdlTaskRequest.alter_table_task:type_name -> greptime.v1.meta.AlterTableTask
+	2,  // 13: greptime.v1.meta.DdlTaskRequest.create_table_task:type_name -> greptime.v1.meta.CreateTableTask
-	8,  // 14: greptime.v1.meta.DdlTaskRequest.truncate_table_task:type_name -> greptime.v1.meta.TruncateTableTask
+	4,  // 14: greptime.v1.meta.DdlTaskRequest.drop_table_task:type_name -> greptime.v1.meta.DropTableTask
-	3,  // 15: greptime.v1.meta.DdlTaskRequest.create_table_tasks:type_name -> greptime.v1.meta.CreateTableTasks
+	6,  // 15: greptime.v1.meta.DdlTaskRequest.alter_table_task:type_name -> greptime.v1.meta.AlterTableTask
-	5,  // 16: greptime.v1.meta.DdlTaskRequest.drop_table_tasks:type_name -> greptime.v1.meta.DropTableTasks
+	8,  // 16: greptime.v1.meta.DdlTaskRequest.truncate_table_task:type_name -> greptime.v1.meta.TruncateTableTask
-	7,  // 17: greptime.v1.meta.DdlTaskRequest.alter_table_tasks:type_name -> greptime.v1.meta.AlterTableTasks
+	3,  // 17: greptime.v1.meta.DdlTaskRequest.create_table_tasks:type_name -> greptime.v1.meta.CreateTableTasks
-	9,  // 18: greptime.v1.meta.DdlTaskRequest.drop_database_task:type_name -> greptime.v1.meta.DropDatabaseTask
+	5,  // 18: greptime.v1.meta.DdlTaskRequest.drop_table_tasks:type_name -> greptime.v1.meta.DropTableTasks
-	1,  // 19: greptime.v1.meta.DdlTaskRequest.create_database_task:type_name -> greptime.v1.meta.CreateDatabaseTask
+	7,  // 19: greptime.v1.meta.DdlTaskRequest.alter_table_tasks:type_name -> greptime.v1.meta.AlterTableTasks
-	20, // 20: greptime.v1.meta.DdlTaskResponse.header:type_name -> greptime.v1.meta.ResponseHeader
+	9,  // 20: greptime.v1.meta.DdlTaskRequest.drop_database_task:type_name -> greptime.v1.meta.DropDatabaseTask
-	21, // 21: greptime.v1.meta.DdlTaskResponse.pid:type_name -> greptime.v1.meta.ProcedureId
+	1,  // 21: greptime.v1.meta.DdlTaskRequest.create_database_task:type_name -> greptime.v1.meta.CreateDatabaseTask
-	22, // 22: greptime.v1.meta.DdlTaskResponse.table_id:type_name -> greptime.v1.meta.TableId
+	10, // 22: greptime.v1.meta.DdlTaskRequest.create_flow_task:type_name -> greptime.v1.meta.CreateFlowTask
-	22, // 23: greptime.v1.meta.DdlTaskResponse.table_ids:type_name -> greptime.v1.meta.TableId
+	11, // 23: greptime.v1.meta.DdlTaskRequest.drop_flow_task:type_name -> greptime.v1.meta.DropFlowTask
-	24, // [24:24] is the sub-list for method output_type
+	24, // 24: greptime.v1.meta.DdlTaskResponse.header:type_name -> greptime.v1.meta.ResponseHeader
-	24, // [24:24] is the sub-list for method input_type
+	25, // 25: greptime.v1.meta.DdlTaskResponse.pid:type_name -> greptime.v1.meta.ProcedureId
-	24, // [24:24] is the sub-list for extension type_name
+	26, // 26: greptime.v1.meta.DdlTaskResponse.table_id:type_name -> greptime.v1.meta.TableId
-	24, // [24:24] is the sub-list for extension extendee
+	26, // 27: greptime.v1.meta.DdlTaskResponse.table_ids:type_name -> greptime.v1.meta.TableId
-	0,  // [0:24] is the sub-list for field type_name
+	28, // [28:28] is the sub-list for method output_type
+	28, // [28:28] is the sub-list for method input_type
+	28, // [28:28] is the sub-list for extension type_name
+	28, // [28:28] is the sub-list for extension extendee
+	0,  // [0:28] is the sub-list for field type_name
 }
 
 func init() { file_greptime_v1_meta_ddl_proto_init() }
@@ -1107,7 +1258,7 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_meta_ddl_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DdlTaskRequest); i {
+			switch v := v.(*CreateFlowTask); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1119,6 +1270,30 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_meta_ddl_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DropFlowTask); 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[11].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DdlTaskRequest); 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[12].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*DdlTaskResponse); i {
 			case 0:
 				return &v.state
@@ -1131,7 +1306,7 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			}
 		}
 	}
-	file_greptime_v1_meta_ddl_proto_msgTypes[9].OneofWrappers = []interface{}{
+	file_greptime_v1_meta_ddl_proto_msgTypes[11].OneofWrappers = []interface{}{
 		(*DdlTaskRequest_CreateTableTask)(nil),
 		(*DdlTaskRequest_DropTableTask)(nil),
 		(*DdlTaskRequest_AlterTableTask)(nil),
@@ -1141,6 +1316,8 @@ func file_greptime_v1_meta_ddl_proto_init() {
 		(*DdlTaskRequest_AlterTableTasks)(nil),
 		(*DdlTaskRequest_DropDatabaseTask)(nil),
 		(*DdlTaskRequest_CreateDatabaseTask)(nil),
+		(*DdlTaskRequest_CreateFlowTask)(nil),
+		(*DdlTaskRequest_DropFlowTask)(nil),
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
@@ -1148,7 +1325,7 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_greptime_v1_meta_ddl_proto_rawDesc,
 			NumEnums:      1,
-			NumMessages:   11,
+			NumMessages:   13,
 			NumExtensions: 0,
 			NumServices:   0,
 		},

proto/greptime/v1/ddl.proto

@@ -33,17 +33,17 @@ message DdlRequest {
     AlterExpr alter = 3;
     DropTableExpr drop_table = 4;
     TruncateTableExpr truncate_table = 7;
-    CreateTaskExpr create_task = 8;
+    CreateFlowTaskExpr create_flow_task = 8;
-    RemoveTaskExpr remove_task = 9;
+    DropFlowTaskExpr drop_flow_task = 9;
   }
 }
 
 // Create a flow task to run the SQL when new data arrives.
-message CreateTaskExpr {
+message CreateFlowTaskExpr {
   string catalog_name = 1;
   string task_name = 2;
-  string output_schema_name = 3;
+  repeated SchemaScopedTableName source_table_names = 3;
-  string output_table_name = 4;
+  SchemaScopedTableName sink_table_name = 4;
   bool create_if_not_exists = 5;
   string expire_when = 6;
   string comment = 7;
@@ -51,8 +51,14 @@ message CreateTaskExpr {
   map<string, string> task_options = 9;
 }
 
+// Table name
+message SchemaScopedTableName {
+  string schema_name = 1;
+  string table_name = 2;
+}
+
 // Remove a flow task.
-message RemoveTaskExpr {
+message DropFlowTaskExpr {
   string catalog_name = 1;
   string task_name = 2;
 }

proto/greptime/v1/flow/server.proto

@@ -42,8 +42,8 @@ message InsertRequest {
 
 message FlowRequest {
   oneof body {
-    FlowCreateRequest create = 1;
+    CreateRequest create = 1;
-    FlowRemoveRequest remove = 2;
+    RemoveRequest remove = 2;
   }
 }
 
@@ -56,16 +56,17 @@ message FlowResponse {
 }
 
 // very similar to `ddl.CreateTaskExpr` just replace `task_name` with `task_id`
-message FlowCreateRequest {
+message CreateRequest {
   TaskId task_id = 1; 
-  TableId output_table_id = 2;
+  repeated TableId source_table_ids = 2;
-  bool create_if_not_exists = 3;
+  TableId sink_table_id = 3;
-  string expire_when = 4;
+  bool create_if_not_exists = 4;
-  string comment = 5;
+  string expire_when = 5;
-  string sql = 6;
+  string comment = 6;
-  map<string, string> task_options = 7;
+  string sql = 7;
+  map<string, string> task_options = 8;
 }
 
-message FlowRemoveRequest { TaskId task_id = 1; }
+message RemoveRequest { TaskId task_id = 1; }
 
 message TaskId { uint32 id = 1; }

proto/greptime/v1/meta/ddl.proto

@@ -59,6 +59,14 @@ message DropDatabaseTask {
     DropDatabaseExpr drop_database = 1;
 }
 
+message CreateFlowTask {
+    CreateFlowTaskExpr create_flow_task = 1;
+}
+
+message DropFlowTask {
+    DropFlowTaskExpr drop_flow_task = 1;
+}
+
 message DdlTaskRequest {
     RequestHeader header = 1;
 
@@ -72,6 +80,8 @@ message DdlTaskRequest {
         AlterTableTasks alter_table_tasks = 8;
         DropDatabaseTask drop_database_task = 9;
         CreateDatabaseTask create_database_task = 10;
+        CreateFlowTask create_flow_task = 11;
+        DropFlowTask drop_flow_task = 12;
      }
 }
 

src/v1.rs

@@ -18,6 +18,7 @@ use crate::v1::value::ValueData;
 
 pub const GREPTIME_GRPC_DESC: &[u8] = tonic::include_file_descriptor_set!("greptime_grpc_desc");
 
+pub mod flow;
 pub mod index;
 pub mod meta;
 pub mod region;

src/v1/flow.rs

@@ -0,0 +1,15 @@
+// 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.
+
+tonic::include_proto!("greptime.v1.flow");