feat: adds view expressions (#165)

* feat: adds view expressions

* feat: adds meta tasks for view

* feat: adds view_info to CreateViewTask

* chore: rename create_or_replace to or_replace

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

@@ -168,6 +168,33 @@ struct DropFlowTaskDefaultTypeInternal {
   };
 };
 PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 DropFlowTaskDefaultTypeInternal _DropFlowTask_default_instance_;
+PROTOBUF_CONSTEXPR CreateViewTask::CreateViewTask(
+    ::_pbi::ConstantInitialized): _impl_{
+    /*decltype(_impl_.view_info_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
+  , /*decltype(_impl_.create_view_)*/nullptr
+  , /*decltype(_impl_._cached_size_)*/{}} {}
+struct CreateViewTaskDefaultTypeInternal {
+  PROTOBUF_CONSTEXPR CreateViewTaskDefaultTypeInternal()
+      : _instance(::_pbi::ConstantInitialized{}) {}
+  ~CreateViewTaskDefaultTypeInternal() {}
+  union {
+    CreateViewTask _instance;
+  };
+};
+PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 CreateViewTaskDefaultTypeInternal _CreateViewTask_default_instance_;
+PROTOBUF_CONSTEXPR DropViewTask::DropViewTask(
+    ::_pbi::ConstantInitialized): _impl_{
+    /*decltype(_impl_.drop_view_)*/nullptr
+  , /*decltype(_impl_._cached_size_)*/{}} {}
+struct DropViewTaskDefaultTypeInternal {
+  PROTOBUF_CONSTEXPR DropViewTaskDefaultTypeInternal()
+      : _instance(::_pbi::ConstantInitialized{}) {}
+  ~DropViewTaskDefaultTypeInternal() {}
+  union {
+    DropViewTask _instance;
+  };
+};
+PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 DropViewTaskDefaultTypeInternal _DropViewTask_default_instance_;
 PROTOBUF_CONSTEXPR DdlTaskRequest::DdlTaskRequest(
     ::_pbi::ConstantInitialized): _impl_{
     /*decltype(_impl_.header_)*/nullptr
@@ -203,7 +230,7 @@ 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[13];
+static ::_pb::Metadata file_level_metadata_greptime_2fv1_2fmeta_2fddl_2eproto[15];
 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;
 
@@ -288,6 +315,21 @@ const uint32_t TableStruct_greptime_2fv1_2fmeta_2fddl_2eproto::offsets[] PROTOBU
   ~0u,  // no _inlined_string_donated_
   PROTOBUF_FIELD_OFFSET(::greptime::v1::meta::DropFlowTask, _impl_.drop_flow_),
   ~0u,  // no _has_bits_
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::meta::CreateViewTask, _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::CreateViewTask, _impl_.create_view_),
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::meta::CreateViewTask, _impl_.view_info_),
+  ~0u,  // no _has_bits_
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::meta::DropViewTask, _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::DropViewTask, _impl_.drop_view_),
+  ~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]),
@@ -306,6 +348,8 @@ 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_),
@@ -330,8 +374,10 @@ static const ::_pbi::MigrationSchema schemas[] PROTOBUF_SECTION_VARIABLE(protode
   { 58, -1, -1, sizeof(::greptime::v1::meta::DropDatabaseTask)},
   { 65, -1, -1, sizeof(::greptime::v1::meta::CreateFlowTask)},
   { 72, -1, -1, sizeof(::greptime::v1::meta::DropFlowTask)},
-  { 79, -1, -1, sizeof(::greptime::v1::meta::DdlTaskRequest)},
+  { 79, -1, -1, sizeof(::greptime::v1::meta::CreateViewTask)},
-  { 99, -1, -1, sizeof(::greptime::v1::meta::DdlTaskResponse)},
+  { 87, -1, -1, sizeof(::greptime::v1::meta::DropViewTask)},
+  { 94, -1, -1, sizeof(::greptime::v1::meta::DdlTaskRequest)},
+  { 116, -1, -1, sizeof(::greptime::v1::meta::DdlTaskResponse)},
 };
 
 static const ::_pb::Message* const file_default_instances[] = {
@@ -346,6 +392,8 @@ static const ::_pb::Message* const file_default_instances[] = {
   &::greptime::v1::meta::_DropDatabaseTask_default_instance_._instance,
   &::greptime::v1::meta::_CreateFlowTask_default_instance_._instance,
   &::greptime::v1::meta::_DropFlowTask_default_instance_._instance,
+  &::greptime::v1::meta::_CreateViewTask_default_instance_._instance,
+  &::greptime::v1::meta::_DropViewTask_default_instance_._instance,
   &::greptime::v1::meta::_DdlTaskRequest_default_instance_._instance,
   &::greptime::v1::meta::_DdlTaskResponse_default_instance_._instance,
 };
@@ -375,35 +423,42 @@ const char descriptor_table_protodef_greptime_2fv1_2fmeta_2fddl_2eproto[] PROTOB
   ".v1.DropDatabaseExpr\"B\n\016CreateFlowTask\0220"
   "\n\013create_flow\030\001 \001(\0132\033.greptime.v1.Create"
   "FlowExpr\"<\n\014DropFlowTask\022,\n\tdrop_flow\030\001 "
-  "\001(\0132\031.greptime.v1.DropFlowExpr\"\271\006\n\016DdlTa"
+  "\001(\0132\031.greptime.v1.DropFlowExpr\"U\n\016Create"
-  "skRequest\022/\n\006header\030\001 \001(\0132\037.greptime.v1."
+  "ViewTask\0220\n\013create_view\030\001 \001(\0132\033.greptime"
-  "meta.RequestHeader\0220\n\rquery_context\030@ \001("
+  ".v1.CreateViewExpr\022\021\n\tview_info\030\002 \001(\014\"<\n"
-  "\0132\031.greptime.v1.QueryContext\022>\n\021create_t"
+  "\014DropViewTask\022,\n\tdrop_view\030\001 \001(\0132\031.grept"
-  "able_task\030\002 \001(\0132!.greptime.v1.meta.Creat"
+  "ime.v1.DropViewExpr\"\261\007\n\016DdlTaskRequest\022/"
-  "eTableTaskH\000\022:\n\017drop_table_task\030\003 \001(\0132\037."
+  "\n\006header\030\001 \001(\0132\037.greptime.v1.meta.Reques"
-  "greptime.v1.meta.DropTableTaskH\000\022<\n\020alte"
+  "tHeader\0220\n\rquery_context\030@ \001(\0132\031.greptim"
-  "r_table_task\030\004 \001(\0132 .greptime.v1.meta.Al"
+  "e.v1.QueryContext\022>\n\021create_table_task\030\002"
-  "terTableTaskH\000\022B\n\023truncate_table_task\030\005 "
+  " \001(\0132!.greptime.v1.meta.CreateTableTaskH"
-  "\001(\0132#.greptime.v1.meta.TruncateTableTask"
+  "\000\022:\n\017drop_table_task\030\003 \001(\0132\037.greptime.v1"
-  "H\000\022@\n\022create_table_tasks\030\006 \001(\0132\".greptim"
+  ".meta.DropTableTaskH\000\022<\n\020alter_table_tas"
-  "e.v1.meta.CreateTableTasksH\000\022<\n\020drop_tab"
+  "k\030\004 \001(\0132 .greptime.v1.meta.AlterTableTas"
-  "le_tasks\030\007 \001(\0132 .greptime.v1.meta.DropTa"
+  "kH\000\022B\n\023truncate_table_task\030\005 \001(\0132#.grept"
-  "bleTasksH\000\022>\n\021alter_table_tasks\030\010 \001(\0132!."
+  "ime.v1.meta.TruncateTableTaskH\000\022@\n\022creat"
-  "greptime.v1.meta.AlterTableTasksH\000\022@\n\022dr"
+  "e_table_tasks\030\006 \001(\0132\".greptime.v1.meta.C"
-  "op_database_task\030\t \001(\0132\".greptime.v1.met"
+  "reateTableTasksH\000\022<\n\020drop_table_tasks\030\007 "
-  "a.DropDatabaseTaskH\000\022D\n\024create_database_"
+  "\001(\0132 .greptime.v1.meta.DropTableTasksH\000\022"
-  "task\030\n \001(\0132$.greptime.v1.meta.CreateData"
+  ">\n\021alter_table_tasks\030\010 \001(\0132!.greptime.v1"
-  "baseTaskH\000\022<\n\020create_flow_task\030\013 \001(\0132 .g"
+  ".meta.AlterTableTasksH\000\022@\n\022drop_database"
-  "reptime.v1.meta.CreateFlowTaskH\000\0228\n\016drop"
+  "_task\030\t \001(\0132\".greptime.v1.meta.DropDatab"
-  "_flow_task\030\014 \001(\0132\036.greptime.v1.meta.Drop"
+  "aseTaskH\000\022D\n\024create_database_task\030\n \001(\0132"
-  "FlowTaskH\000B\006\n\004task\"\300\001\n\017DdlTaskResponse\0220"
+  "$.greptime.v1.meta.CreateDatabaseTaskH\000\022"
-  "\n\006header\030\001 \001(\0132 .greptime.v1.meta.Respon"
+  "<\n\020create_flow_task\030\013 \001(\0132 .greptime.v1."
-  "seHeader\022*\n\003pid\030\002 \001(\0132\035.greptime.v1.meta"
+  "meta.CreateFlowTaskH\000\0228\n\016drop_flow_task\030"
-  ".ProcedureId\022&\n\010table_id\030\004 \001(\0132\024.greptim"
+  "\014 \001(\0132\036.greptime.v1.meta.DropFlowTaskH\000\022"
-  "e.v1.TableId\022\'\n\ttable_ids\030\005 \003(\0132\024.grepti"
+  "<\n\020create_view_task\030\r \001(\0132 .greptime.v1."
-  "me.v1.TableId*#\n\013DdlTaskType\022\n\n\006Create\020\000"
+  "meta.CreateViewTaskH\000\0228\n\016drop_view_task\030"
-  "\022\010\n\004Drop\020\001B<Z:github.com/GreptimeTeam/gr"
+  "\016 \001(\0132\036.greptime.v1.meta.DropViewTaskH\000B"
-  "eptime-proto/go/greptime/v1/metab\006proto3"
+  "\006\n\004task\"\300\001\n\017DdlTaskResponse\0220\n\006header\030\001 "
+  "\001(\0132 .greptime.v1.meta.ResponseHeader\022*\n"
+  "\003pid\030\002 \001(\0132\035.greptime.v1.meta.ProcedureI"
+  "d\022&\n\010table_id\030\004 \001(\0132\024.greptime.v1.TableI"
+  "d\022\'\n\ttable_ids\030\005 \003(\0132\024.greptime.v1.Table"
+  "Id*#\n\013DdlTaskType\022\n\n\006Create\020\000\022\010\n\004Drop\020\001B"
+  "<Z:github.com/GreptimeTeam/greptime-prot"
+  "o/go/greptime/v1/metab\006proto3"
   ;
 static const ::_pbi::DescriptorTable* const descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_deps[4] = {
   &::descriptor_table_greptime_2fv1_2fcommon_2eproto,
@@ -413,9 +468,9 @@ 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, 2120, descriptor_table_protodef_greptime_2fv1_2fmeta_2fddl_2eproto,
+    false, false, 2389, 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, 4, 13,
+    &descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_once, descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_deps, 4, 15,
     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,
@@ -2677,6 +2732,451 @@ void DropFlowTask::InternalSwap(DropFlowTask* other) {
 
 // ===================================================================
 
+class CreateViewTask::_Internal {
+ public:
+  static const ::greptime::v1::CreateViewExpr& create_view(const CreateViewTask* msg);
+};
+
+const ::greptime::v1::CreateViewExpr&
+CreateViewTask::_Internal::create_view(const CreateViewTask* msg) {
+  return *msg->_impl_.create_view_;
+}
+void CreateViewTask::clear_create_view() {
+  if (GetArenaForAllocation() == nullptr && _impl_.create_view_ != nullptr) {
+    delete _impl_.create_view_;
+  }
+  _impl_.create_view_ = nullptr;
+}
+CreateViewTask::CreateViewTask(::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.CreateViewTask)
+}
+CreateViewTask::CreateViewTask(const CreateViewTask& from)
+  : ::PROTOBUF_NAMESPACE_ID::Message() {
+  CreateViewTask* const _this = this; (void)_this;
+  new (&_impl_) Impl_{
+      decltype(_impl_.view_info_){}
+    , decltype(_impl_.create_view_){nullptr}
+    , /*decltype(_impl_._cached_size_)*/{}};
+
+  _internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
+  _impl_.view_info_.InitDefault();
+  #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+    _impl_.view_info_.Set("", GetArenaForAllocation());
+  #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  if (!from._internal_view_info().empty()) {
+    _this->_impl_.view_info_.Set(from._internal_view_info(), 
+      _this->GetArenaForAllocation());
+  }
+  if (from._internal_has_create_view()) {
+    _this->_impl_.create_view_ = new ::greptime::v1::CreateViewExpr(*from._impl_.create_view_);
+  }
+  // @@protoc_insertion_point(copy_constructor:greptime.v1.meta.CreateViewTask)
+}
+
+inline void CreateViewTask::SharedCtor(
+    ::_pb::Arena* arena, bool is_message_owned) {
+  (void)arena;
+  (void)is_message_owned;
+  new (&_impl_) Impl_{
+      decltype(_impl_.view_info_){}
+    , decltype(_impl_.create_view_){nullptr}
+    , /*decltype(_impl_._cached_size_)*/{}
+  };
+  _impl_.view_info_.InitDefault();
+  #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+    _impl_.view_info_.Set("", GetArenaForAllocation());
+  #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+}
+
+CreateViewTask::~CreateViewTask() {
+  // @@protoc_insertion_point(destructor:greptime.v1.meta.CreateViewTask)
+  if (auto *arena = _internal_metadata_.DeleteReturnArena<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>()) {
+  (void)arena;
+    return;
+  }
+  SharedDtor();
+}
+
+inline void CreateViewTask::SharedDtor() {
+  GOOGLE_DCHECK(GetArenaForAllocation() == nullptr);
+  _impl_.view_info_.Destroy();
+  if (this != internal_default_instance()) delete _impl_.create_view_;
+}
+
+void CreateViewTask::SetCachedSize(int size) const {
+  _impl_._cached_size_.Set(size);
+}
+
+void CreateViewTask::Clear() {
+// @@protoc_insertion_point(message_clear_start:greptime.v1.meta.CreateViewTask)
+  uint32_t cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  _impl_.view_info_.ClearToEmpty();
+  if (GetArenaForAllocation() == nullptr && _impl_.create_view_ != nullptr) {
+    delete _impl_.create_view_;
+  }
+  _impl_.create_view_ = nullptr;
+  _internal_metadata_.Clear<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>();
+}
+
+const char* CreateViewTask::_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.CreateViewExpr create_view = 1;
+      case 1:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 10)) {
+          ptr = ctx->ParseMessage(_internal_mutable_create_view(), ptr);
+          CHK_(ptr);
+        } else
+          goto handle_unusual;
+        continue;
+      // bytes view_info = 2;
+      case 2:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 18)) {
+          auto str = _internal_mutable_view_info();
+          ptr = ::_pbi::InlineGreedyStringParser(str, ptr, ctx);
+          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* CreateViewTask::_InternalSerialize(
+    uint8_t* target, ::PROTOBUF_NAMESPACE_ID::io::EpsCopyOutputStream* stream) const {
+  // @@protoc_insertion_point(serialize_to_array_start:greptime.v1.meta.CreateViewTask)
+  uint32_t cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  // .greptime.v1.CreateViewExpr create_view = 1;
+  if (this->_internal_has_create_view()) {
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::
+      InternalWriteMessage(1, _Internal::create_view(this),
+        _Internal::create_view(this).GetCachedSize(), target, stream);
+  }
+
+  // bytes view_info = 2;
+  if (!this->_internal_view_info().empty()) {
+    target = stream->WriteBytesMaybeAliased(
+        2, this->_internal_view_info(), target);
+  }
+
+  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.CreateViewTask)
+  return target;
+}
+
+size_t CreateViewTask::ByteSizeLong() const {
+// @@protoc_insertion_point(message_byte_size_start:greptime.v1.meta.CreateViewTask)
+  size_t total_size = 0;
+
+  uint32_t cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  // bytes view_info = 2;
+  if (!this->_internal_view_info().empty()) {
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::BytesSize(
+        this->_internal_view_info());
+  }
+
+  // .greptime.v1.CreateViewExpr create_view = 1;
+  if (this->_internal_has_create_view()) {
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::MessageSize(
+        *_impl_.create_view_);
+  }
+
+  return MaybeComputeUnknownFieldsSize(total_size, &_impl_._cached_size_);
+}
+
+const ::PROTOBUF_NAMESPACE_ID::Message::ClassData CreateViewTask::_class_data_ = {
+    ::PROTOBUF_NAMESPACE_ID::Message::CopyWithSourceCheck,
+    CreateViewTask::MergeImpl
+};
+const ::PROTOBUF_NAMESPACE_ID::Message::ClassData*CreateViewTask::GetClassData() const { return &_class_data_; }
+
+
+void CreateViewTask::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::PROTOBUF_NAMESPACE_ID::Message& from_msg) {
+  auto* const _this = static_cast<CreateViewTask*>(&to_msg);
+  auto& from = static_cast<const CreateViewTask&>(from_msg);
+  // @@protoc_insertion_point(class_specific_merge_from_start:greptime.v1.meta.CreateViewTask)
+  GOOGLE_DCHECK_NE(&from, _this);
+  uint32_t cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  if (!from._internal_view_info().empty()) {
+    _this->_internal_set_view_info(from._internal_view_info());
+  }
+  if (from._internal_has_create_view()) {
+    _this->_internal_mutable_create_view()->::greptime::v1::CreateViewExpr::MergeFrom(
+        from._internal_create_view());
+  }
+  _this->_internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
+}
+
+void CreateViewTask::CopyFrom(const CreateViewTask& from) {
+// @@protoc_insertion_point(class_specific_copy_from_start:greptime.v1.meta.CreateViewTask)
+  if (&from == this) return;
+  Clear();
+  MergeFrom(from);
+}
+
+bool CreateViewTask::IsInitialized() const {
+  return true;
+}
+
+void CreateViewTask::InternalSwap(CreateViewTask* other) {
+  using std::swap;
+  auto* lhs_arena = GetArenaForAllocation();
+  auto* rhs_arena = other->GetArenaForAllocation();
+  _internal_metadata_.InternalSwap(&other->_internal_metadata_);
+  ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::InternalSwap(
+      &_impl_.view_info_, lhs_arena,
+      &other->_impl_.view_info_, rhs_arena
+  );
+  swap(_impl_.create_view_, other->_impl_.create_view_);
+}
+
+::PROTOBUF_NAMESPACE_ID::Metadata CreateViewTask::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[11]);
+}
+
+// ===================================================================
+
+class DropViewTask::_Internal {
+ public:
+  static const ::greptime::v1::DropViewExpr& drop_view(const DropViewTask* msg);
+};
+
+const ::greptime::v1::DropViewExpr&
+DropViewTask::_Internal::drop_view(const DropViewTask* msg) {
+  return *msg->_impl_.drop_view_;
+}
+void DropViewTask::clear_drop_view() {
+  if (GetArenaForAllocation() == nullptr && _impl_.drop_view_ != nullptr) {
+    delete _impl_.drop_view_;
+  }
+  _impl_.drop_view_ = nullptr;
+}
+DropViewTask::DropViewTask(::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.DropViewTask)
+}
+DropViewTask::DropViewTask(const DropViewTask& from)
+  : ::PROTOBUF_NAMESPACE_ID::Message() {
+  DropViewTask* const _this = this; (void)_this;
+  new (&_impl_) Impl_{
+      decltype(_impl_.drop_view_){nullptr}
+    , /*decltype(_impl_._cached_size_)*/{}};
+
+  _internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
+  if (from._internal_has_drop_view()) {
+    _this->_impl_.drop_view_ = new ::greptime::v1::DropViewExpr(*from._impl_.drop_view_);
+  }
+  // @@protoc_insertion_point(copy_constructor:greptime.v1.meta.DropViewTask)
+}
+
+inline void DropViewTask::SharedCtor(
+    ::_pb::Arena* arena, bool is_message_owned) {
+  (void)arena;
+  (void)is_message_owned;
+  new (&_impl_) Impl_{
+      decltype(_impl_.drop_view_){nullptr}
+    , /*decltype(_impl_._cached_size_)*/{}
+  };
+}
+
+DropViewTask::~DropViewTask() {
+  // @@protoc_insertion_point(destructor:greptime.v1.meta.DropViewTask)
+  if (auto *arena = _internal_metadata_.DeleteReturnArena<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>()) {
+  (void)arena;
+    return;
+  }
+  SharedDtor();
+}
+
+inline void DropViewTask::SharedDtor() {
+  GOOGLE_DCHECK(GetArenaForAllocation() == nullptr);
+  if (this != internal_default_instance()) delete _impl_.drop_view_;
+}
+
+void DropViewTask::SetCachedSize(int size) const {
+  _impl_._cached_size_.Set(size);
+}
+
+void DropViewTask::Clear() {
+// @@protoc_insertion_point(message_clear_start:greptime.v1.meta.DropViewTask)
+  uint32_t cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  if (GetArenaForAllocation() == nullptr && _impl_.drop_view_ != nullptr) {
+    delete _impl_.drop_view_;
+  }
+  _impl_.drop_view_ = nullptr;
+  _internal_metadata_.Clear<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>();
+}
+
+const char* DropViewTask::_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.DropViewExpr drop_view = 1;
+      case 1:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 10)) {
+          ptr = ctx->ParseMessage(_internal_mutable_drop_view(), 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* DropViewTask::_InternalSerialize(
+    uint8_t* target, ::PROTOBUF_NAMESPACE_ID::io::EpsCopyOutputStream* stream) const {
+  // @@protoc_insertion_point(serialize_to_array_start:greptime.v1.meta.DropViewTask)
+  uint32_t cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  // .greptime.v1.DropViewExpr drop_view = 1;
+  if (this->_internal_has_drop_view()) {
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::
+      InternalWriteMessage(1, _Internal::drop_view(this),
+        _Internal::drop_view(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.DropViewTask)
+  return target;
+}
+
+size_t DropViewTask::ByteSizeLong() const {
+// @@protoc_insertion_point(message_byte_size_start:greptime.v1.meta.DropViewTask)
+  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.DropViewExpr drop_view = 1;
+  if (this->_internal_has_drop_view()) {
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::MessageSize(
+        *_impl_.drop_view_);
+  }
+
+  return MaybeComputeUnknownFieldsSize(total_size, &_impl_._cached_size_);
+}
+
+const ::PROTOBUF_NAMESPACE_ID::Message::ClassData DropViewTask::_class_data_ = {
+    ::PROTOBUF_NAMESPACE_ID::Message::CopyWithSourceCheck,
+    DropViewTask::MergeImpl
+};
+const ::PROTOBUF_NAMESPACE_ID::Message::ClassData*DropViewTask::GetClassData() const { return &_class_data_; }
+
+
+void DropViewTask::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::PROTOBUF_NAMESPACE_ID::Message& from_msg) {
+  auto* const _this = static_cast<DropViewTask*>(&to_msg);
+  auto& from = static_cast<const DropViewTask&>(from_msg);
+  // @@protoc_insertion_point(class_specific_merge_from_start:greptime.v1.meta.DropViewTask)
+  GOOGLE_DCHECK_NE(&from, _this);
+  uint32_t cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  if (from._internal_has_drop_view()) {
+    _this->_internal_mutable_drop_view()->::greptime::v1::DropViewExpr::MergeFrom(
+        from._internal_drop_view());
+  }
+  _this->_internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
+}
+
+void DropViewTask::CopyFrom(const DropViewTask& from) {
+// @@protoc_insertion_point(class_specific_copy_from_start:greptime.v1.meta.DropViewTask)
+  if (&from == this) return;
+  Clear();
+  MergeFrom(from);
+}
+
+bool DropViewTask::IsInitialized() const {
+  return true;
+}
+
+void DropViewTask::InternalSwap(DropViewTask* other) {
+  using std::swap;
+  _internal_metadata_.InternalSwap(&other->_internal_metadata_);
+  swap(_impl_.drop_view_, other->_impl_.drop_view_);
+}
+
+::PROTOBUF_NAMESPACE_ID::Metadata DropViewTask::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[12]);
+}
+
+// ===================================================================
+
 class DdlTaskRequest::_Internal {
  public:
   static const ::greptime::v1::meta::RequestHeader& header(const DdlTaskRequest* msg);
@@ -2692,6 +3192,8 @@ class DdlTaskRequest::_Internal {
   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);
+  static const ::greptime::v1::meta::CreateViewTask& create_view_task(const DdlTaskRequest* msg);
+  static const ::greptime::v1::meta::DropViewTask& drop_view_task(const DdlTaskRequest* msg);
 };
 
 const ::greptime::v1::meta::RequestHeader&
@@ -2746,6 +3248,14 @@ const ::greptime::v1::meta::DropFlowTask&
 DdlTaskRequest::_Internal::drop_flow_task(const DdlTaskRequest* msg) {
   return *msg->_impl_.task_.drop_flow_task_;
 }
+const ::greptime::v1::meta::CreateViewTask&
+DdlTaskRequest::_Internal::create_view_task(const DdlTaskRequest* msg) {
+  return *msg->_impl_.task_.create_view_task_;
+}
+const ::greptime::v1::meta::DropViewTask&
+DdlTaskRequest::_Internal::drop_view_task(const DdlTaskRequest* msg) {
+  return *msg->_impl_.task_.drop_view_task_;
+}
 void DdlTaskRequest::clear_header() {
   if (GetArenaForAllocation() == nullptr && _impl_.header_ != nullptr) {
     delete _impl_.header_;
@@ -2923,6 +3433,36 @@ void DdlTaskRequest::set_allocated_drop_flow_task(::greptime::v1::meta::DropFlow
   }
   // @@protoc_insertion_point(field_set_allocated:greptime.v1.meta.DdlTaskRequest.drop_flow_task)
 }
+void DdlTaskRequest::set_allocated_create_view_task(::greptime::v1::meta::CreateViewTask* create_view_task) {
+  ::PROTOBUF_NAMESPACE_ID::Arena* message_arena = GetArenaForAllocation();
+  clear_task();
+  if (create_view_task) {
+    ::PROTOBUF_NAMESPACE_ID::Arena* submessage_arena =
+      ::PROTOBUF_NAMESPACE_ID::Arena::InternalGetOwningArena(create_view_task);
+    if (message_arena != submessage_arena) {
+      create_view_task = ::PROTOBUF_NAMESPACE_ID::internal::GetOwnedMessage(
+          message_arena, create_view_task, submessage_arena);
+    }
+    set_has_create_view_task();
+    _impl_.task_.create_view_task_ = create_view_task;
+  }
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.meta.DdlTaskRequest.create_view_task)
+}
+void DdlTaskRequest::set_allocated_drop_view_task(::greptime::v1::meta::DropViewTask* drop_view_task) {
+  ::PROTOBUF_NAMESPACE_ID::Arena* message_arena = GetArenaForAllocation();
+  clear_task();
+  if (drop_view_task) {
+    ::PROTOBUF_NAMESPACE_ID::Arena* submessage_arena =
+      ::PROTOBUF_NAMESPACE_ID::Arena::InternalGetOwningArena(drop_view_task);
+    if (message_arena != submessage_arena) {
+      drop_view_task = ::PROTOBUF_NAMESPACE_ID::internal::GetOwnedMessage(
+          message_arena, drop_view_task, submessage_arena);
+    }
+    set_has_drop_view_task();
+    _impl_.task_.drop_view_task_ = drop_view_task;
+  }
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.meta.DdlTaskRequest.drop_view_task)
+}
 DdlTaskRequest::DdlTaskRequest(::PROTOBUF_NAMESPACE_ID::Arena* arena,
                          bool is_message_owned)
   : ::PROTOBUF_NAMESPACE_ID::Message(arena, is_message_owned) {
@@ -3003,6 +3543,16 @@ DdlTaskRequest::DdlTaskRequest(const DdlTaskRequest& from)
           from._internal_drop_flow_task());
       break;
     }
+    case kCreateViewTask: {
+      _this->_internal_mutable_create_view_task()->::greptime::v1::meta::CreateViewTask::MergeFrom(
+          from._internal_create_view_task());
+      break;
+    }
+    case kDropViewTask: {
+      _this->_internal_mutable_drop_view_task()->::greptime::v1::meta::DropViewTask::MergeFrom(
+          from._internal_drop_view_task());
+      break;
+    }
     case TASK_NOT_SET: {
       break;
     }
@@ -3115,6 +3665,18 @@ void DdlTaskRequest::clear_task() {
       }
       break;
     }
+    case kCreateViewTask: {
+      if (GetArenaForAllocation() == nullptr) {
+        delete _impl_.task_.create_view_task_;
+      }
+      break;
+    }
+    case kDropViewTask: {
+      if (GetArenaForAllocation() == nullptr) {
+        delete _impl_.task_.drop_view_task_;
+      }
+      break;
+    }
     case TASK_NOT_SET: {
       break;
     }
@@ -3243,6 +3805,22 @@ const char* DdlTaskRequest::_InternalParse(const char* ptr, ::_pbi::ParseContext
         } else
           goto handle_unusual;
         continue;
+      // .greptime.v1.meta.CreateViewTask create_view_task = 13;
+      case 13:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 106)) {
+          ptr = ctx->ParseMessage(_internal_mutable_create_view_task(), ptr);
+          CHK_(ptr);
+        } else
+          goto handle_unusual;
+        continue;
+      // .greptime.v1.meta.DropViewTask drop_view_task = 14;
+      case 14:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 114)) {
+          ptr = ctx->ParseMessage(_internal_mutable_drop_view_task(), ptr);
+          CHK_(ptr);
+        } else
+          goto handle_unusual;
+        continue;
       // .greptime.v1.QueryContext query_context = 64;
       case 64:
         if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 2)) {
@@ -3364,6 +3942,20 @@ uint8_t* DdlTaskRequest::_InternalSerialize(
         _Internal::drop_flow_task(this).GetCachedSize(), target, stream);
   }
 
+  // .greptime.v1.meta.CreateViewTask create_view_task = 13;
+  if (_internal_has_create_view_task()) {
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::
+      InternalWriteMessage(13, _Internal::create_view_task(this),
+        _Internal::create_view_task(this).GetCachedSize(), target, stream);
+  }
+
+  // .greptime.v1.meta.DropViewTask drop_view_task = 14;
+  if (_internal_has_drop_view_task()) {
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::
+      InternalWriteMessage(14, _Internal::drop_view_task(this),
+        _Internal::drop_view_task(this).GetCachedSize(), target, stream);
+  }
+
   // .greptime.v1.QueryContext query_context = 64;
   if (this->_internal_has_query_context()) {
     target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::
@@ -3479,6 +4071,20 @@ size_t DdlTaskRequest::ByteSizeLong() const {
           *_impl_.task_.drop_flow_task_);
       break;
     }
+    // .greptime.v1.meta.CreateViewTask create_view_task = 13;
+    case kCreateViewTask: {
+      total_size += 1 +
+        ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::MessageSize(
+          *_impl_.task_.create_view_task_);
+      break;
+    }
+    // .greptime.v1.meta.DropViewTask drop_view_task = 14;
+    case kDropViewTask: {
+      total_size += 1 +
+        ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::MessageSize(
+          *_impl_.task_.drop_view_task_);
+      break;
+    }
     case TASK_NOT_SET: {
       break;
     }
@@ -3565,6 +4171,16 @@ void DdlTaskRequest::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const :
           from._internal_drop_flow_task());
       break;
     }
+    case kCreateViewTask: {
+      _this->_internal_mutable_create_view_task()->::greptime::v1::meta::CreateViewTask::MergeFrom(
+          from._internal_create_view_task());
+      break;
+    }
+    case kDropViewTask: {
+      _this->_internal_mutable_drop_view_task()->::greptime::v1::meta::DropViewTask::MergeFrom(
+          from._internal_drop_view_task());
+      break;
+    }
     case TASK_NOT_SET: {
       break;
     }
@@ -3599,7 +4215,7 @@ 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[11]);
+      file_level_metadata_greptime_2fv1_2fmeta_2fddl_2eproto[13]);
 }
 
 // ===================================================================
@@ -3934,7 +4550,7 @@ 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[12]);
+      file_level_metadata_greptime_2fv1_2fmeta_2fddl_2eproto[14]);
 }
 
 // @@protoc_insertion_point(namespace_scope)
@@ -3986,6 +4602,14 @@ 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::CreateViewTask*
+Arena::CreateMaybeMessage< ::greptime::v1::meta::CreateViewTask >(Arena* arena) {
+  return Arena::CreateMessageInternal< ::greptime::v1::meta::CreateViewTask >(arena);
+}
+template<> PROTOBUF_NOINLINE ::greptime::v1::meta::DropViewTask*
+Arena::CreateMaybeMessage< ::greptime::v1::meta::DropViewTask >(Arena* arena) {
+  return Arena::CreateMessageInternal< ::greptime::v1::meta::DropViewTask >(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

@@ -70,6 +70,9 @@ extern CreateTableTaskDefaultTypeInternal _CreateTableTask_default_instance_;
 class CreateTableTasks;
 struct CreateTableTasksDefaultTypeInternal;
 extern CreateTableTasksDefaultTypeInternal _CreateTableTasks_default_instance_;
+class CreateViewTask;
+struct CreateViewTaskDefaultTypeInternal;
+extern CreateViewTaskDefaultTypeInternal _CreateViewTask_default_instance_;
 class DdlTaskRequest;
 struct DdlTaskRequestDefaultTypeInternal;
 extern DdlTaskRequestDefaultTypeInternal _DdlTaskRequest_default_instance_;
@@ -88,6 +91,9 @@ extern DropTableTaskDefaultTypeInternal _DropTableTask_default_instance_;
 class DropTableTasks;
 struct DropTableTasksDefaultTypeInternal;
 extern DropTableTasksDefaultTypeInternal _DropTableTasks_default_instance_;
+class DropViewTask;
+struct DropViewTaskDefaultTypeInternal;
+extern DropViewTaskDefaultTypeInternal _DropViewTask_default_instance_;
 class TruncateTableTask;
 struct TruncateTableTaskDefaultTypeInternal;
 extern TruncateTableTaskDefaultTypeInternal _TruncateTableTask_default_instance_;
@@ -101,12 +107,14 @@ template<> ::greptime::v1::meta::CreateDatabaseTask* Arena::CreateMaybeMessage<:
 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::CreateViewTask* Arena::CreateMaybeMessage<::greptime::v1::meta::CreateViewTask>(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::DropViewTask* Arena::CreateMaybeMessage<::greptime::v1::meta::DropViewTask>(Arena*);
 template<> ::greptime::v1::meta::TruncateTableTask* Arena::CreateMaybeMessage<::greptime::v1::meta::TruncateTableTask>(Arena*);
 PROTOBUF_NAMESPACE_CLOSE
 namespace greptime {
@@ -1903,6 +1911,336 @@ class DropFlowTask final :
 };
 // -------------------------------------------------------------------
 
+class CreateViewTask final :
+    public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:greptime.v1.meta.CreateViewTask) */ {
+ public:
+  inline CreateViewTask() : CreateViewTask(nullptr) {}
+  ~CreateViewTask() override;
+  explicit PROTOBUF_CONSTEXPR CreateViewTask(::PROTOBUF_NAMESPACE_ID::internal::ConstantInitialized);
+
+  CreateViewTask(const CreateViewTask& from);
+  CreateViewTask(CreateViewTask&& from) noexcept
+    : CreateViewTask() {
+    *this = ::std::move(from);
+  }
+
+  inline CreateViewTask& operator=(const CreateViewTask& from) {
+    CopyFrom(from);
+    return *this;
+  }
+  inline CreateViewTask& operator=(CreateViewTask&& 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 CreateViewTask& default_instance() {
+    return *internal_default_instance();
+  }
+  static inline const CreateViewTask* internal_default_instance() {
+    return reinterpret_cast<const CreateViewTask*>(
+               &_CreateViewTask_default_instance_);
+  }
+  static constexpr int kIndexInFileMessages =
+    11;
+
+  friend void swap(CreateViewTask& a, CreateViewTask& b) {
+    a.Swap(&b);
+  }
+  inline void Swap(CreateViewTask* 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(CreateViewTask* other) {
+    if (other == this) return;
+    GOOGLE_DCHECK(GetOwningArena() == other->GetOwningArena());
+    InternalSwap(other);
+  }
+
+  // implements Message ----------------------------------------------
+
+  CreateViewTask* New(::PROTOBUF_NAMESPACE_ID::Arena* arena = nullptr) const final {
+    return CreateMaybeMessage<CreateViewTask>(arena);
+  }
+  using ::PROTOBUF_NAMESPACE_ID::Message::CopyFrom;
+  void CopyFrom(const CreateViewTask& from);
+  using ::PROTOBUF_NAMESPACE_ID::Message::MergeFrom;
+  void MergeFrom( const CreateViewTask& from) {
+    CreateViewTask::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(CreateViewTask* other);
+
+  private:
+  friend class ::PROTOBUF_NAMESPACE_ID::internal::AnyMetadata;
+  static ::PROTOBUF_NAMESPACE_ID::StringPiece FullMessageName() {
+    return "greptime.v1.meta.CreateViewTask";
+  }
+  protected:
+  explicit CreateViewTask(::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 {
+    kViewInfoFieldNumber = 2,
+    kCreateViewFieldNumber = 1,
+  };
+  // bytes view_info = 2;
+  void clear_view_info();
+  const std::string& view_info() const;
+  template <typename ArgT0 = const std::string&, typename... ArgT>
+  void set_view_info(ArgT0&& arg0, ArgT... args);
+  std::string* mutable_view_info();
+  PROTOBUF_NODISCARD std::string* release_view_info();
+  void set_allocated_view_info(std::string* view_info);
+  private:
+  const std::string& _internal_view_info() const;
+  inline PROTOBUF_ALWAYS_INLINE void _internal_set_view_info(const std::string& value);
+  std::string* _internal_mutable_view_info();
+  public:
+
+  // .greptime.v1.CreateViewExpr create_view = 1;
+  bool has_create_view() const;
+  private:
+  bool _internal_has_create_view() const;
+  public:
+  void clear_create_view();
+  const ::greptime::v1::CreateViewExpr& create_view() const;
+  PROTOBUF_NODISCARD ::greptime::v1::CreateViewExpr* release_create_view();
+  ::greptime::v1::CreateViewExpr* mutable_create_view();
+  void set_allocated_create_view(::greptime::v1::CreateViewExpr* create_view);
+  private:
+  const ::greptime::v1::CreateViewExpr& _internal_create_view() const;
+  ::greptime::v1::CreateViewExpr* _internal_mutable_create_view();
+  public:
+  void unsafe_arena_set_allocated_create_view(
+      ::greptime::v1::CreateViewExpr* create_view);
+  ::greptime::v1::CreateViewExpr* unsafe_arena_release_create_view();
+
+  // @@protoc_insertion_point(class_scope:greptime.v1.meta.CreateViewTask)
+ private:
+  class _Internal;
+
+  template <typename T> friend class ::PROTOBUF_NAMESPACE_ID::Arena::InternalHelper;
+  typedef void InternalArenaConstructable_;
+  typedef void DestructorSkippable_;
+  struct Impl_ {
+    ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr view_info_;
+    ::greptime::v1::CreateViewExpr* create_view_;
+    mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
+  };
+  union { Impl_ _impl_; };
+  friend struct ::TableStruct_greptime_2fv1_2fmeta_2fddl_2eproto;
+};
+// -------------------------------------------------------------------
+
+class DropViewTask final :
+    public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:greptime.v1.meta.DropViewTask) */ {
+ public:
+  inline DropViewTask() : DropViewTask(nullptr) {}
+  ~DropViewTask() override;
+  explicit PROTOBUF_CONSTEXPR DropViewTask(::PROTOBUF_NAMESPACE_ID::internal::ConstantInitialized);
+
+  DropViewTask(const DropViewTask& from);
+  DropViewTask(DropViewTask&& from) noexcept
+    : DropViewTask() {
+    *this = ::std::move(from);
+  }
+
+  inline DropViewTask& operator=(const DropViewTask& from) {
+    CopyFrom(from);
+    return *this;
+  }
+  inline DropViewTask& operator=(DropViewTask&& 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 DropViewTask& default_instance() {
+    return *internal_default_instance();
+  }
+  static inline const DropViewTask* internal_default_instance() {
+    return reinterpret_cast<const DropViewTask*>(
+               &_DropViewTask_default_instance_);
+  }
+  static constexpr int kIndexInFileMessages =
+    12;
+
+  friend void swap(DropViewTask& a, DropViewTask& b) {
+    a.Swap(&b);
+  }
+  inline void Swap(DropViewTask* 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(DropViewTask* other) {
+    if (other == this) return;
+    GOOGLE_DCHECK(GetOwningArena() == other->GetOwningArena());
+    InternalSwap(other);
+  }
+
+  // implements Message ----------------------------------------------
+
+  DropViewTask* New(::PROTOBUF_NAMESPACE_ID::Arena* arena = nullptr) const final {
+    return CreateMaybeMessage<DropViewTask>(arena);
+  }
+  using ::PROTOBUF_NAMESPACE_ID::Message::CopyFrom;
+  void CopyFrom(const DropViewTask& from);
+  using ::PROTOBUF_NAMESPACE_ID::Message::MergeFrom;
+  void MergeFrom( const DropViewTask& from) {
+    DropViewTask::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(DropViewTask* other);
+
+  private:
+  friend class ::PROTOBUF_NAMESPACE_ID::internal::AnyMetadata;
+  static ::PROTOBUF_NAMESPACE_ID::StringPiece FullMessageName() {
+    return "greptime.v1.meta.DropViewTask";
+  }
+  protected:
+  explicit DropViewTask(::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 {
+    kDropViewFieldNumber = 1,
+  };
+  // .greptime.v1.DropViewExpr drop_view = 1;
+  bool has_drop_view() const;
+  private:
+  bool _internal_has_drop_view() const;
+  public:
+  void clear_drop_view();
+  const ::greptime::v1::DropViewExpr& drop_view() const;
+  PROTOBUF_NODISCARD ::greptime::v1::DropViewExpr* release_drop_view();
+  ::greptime::v1::DropViewExpr* mutable_drop_view();
+  void set_allocated_drop_view(::greptime::v1::DropViewExpr* drop_view);
+  private:
+  const ::greptime::v1::DropViewExpr& _internal_drop_view() const;
+  ::greptime::v1::DropViewExpr* _internal_mutable_drop_view();
+  public:
+  void unsafe_arena_set_allocated_drop_view(
+      ::greptime::v1::DropViewExpr* drop_view);
+  ::greptime::v1::DropViewExpr* unsafe_arena_release_drop_view();
+
+  // @@protoc_insertion_point(class_scope:greptime.v1.meta.DropViewTask)
+ private:
+  class _Internal;
+
+  template <typename T> friend class ::PROTOBUF_NAMESPACE_ID::Arena::InternalHelper;
+  typedef void InternalArenaConstructable_;
+  typedef void DestructorSkippable_;
+  struct Impl_ {
+    ::greptime::v1::DropViewExpr* drop_view_;
+    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:
@@ -1958,6 +2296,8 @@ class DdlTaskRequest final :
     kCreateDatabaseTask = 10,
     kCreateFlowTask = 11,
     kDropFlowTask = 12,
+    kCreateViewTask = 13,
+    kDropViewTask = 14,
     TASK_NOT_SET = 0,
   };
 
@@ -1966,7 +2306,7 @@ class DdlTaskRequest final :
                &_DdlTaskRequest_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    11;
+    13;
 
   friend void swap(DdlTaskRequest& a, DdlTaskRequest& b) {
     a.Swap(&b);
@@ -2052,6 +2392,8 @@ class DdlTaskRequest final :
     kCreateDatabaseTaskFieldNumber = 10,
     kCreateFlowTaskFieldNumber = 11,
     kDropFlowTaskFieldNumber = 12,
+    kCreateViewTaskFieldNumber = 13,
+    kDropViewTaskFieldNumber = 14,
   };
   // .greptime.v1.meta.RequestHeader header = 1;
   bool has_header() const;
@@ -2287,6 +2629,42 @@ class DdlTaskRequest final :
       ::greptime::v1::meta::DropFlowTask* drop_flow_task);
   ::greptime::v1::meta::DropFlowTask* unsafe_arena_release_drop_flow_task();
 
+  // .greptime.v1.meta.CreateViewTask create_view_task = 13;
+  bool has_create_view_task() const;
+  private:
+  bool _internal_has_create_view_task() const;
+  public:
+  void clear_create_view_task();
+  const ::greptime::v1::meta::CreateViewTask& create_view_task() const;
+  PROTOBUF_NODISCARD ::greptime::v1::meta::CreateViewTask* release_create_view_task();
+  ::greptime::v1::meta::CreateViewTask* mutable_create_view_task();
+  void set_allocated_create_view_task(::greptime::v1::meta::CreateViewTask* create_view_task);
+  private:
+  const ::greptime::v1::meta::CreateViewTask& _internal_create_view_task() const;
+  ::greptime::v1::meta::CreateViewTask* _internal_mutable_create_view_task();
+  public:
+  void unsafe_arena_set_allocated_create_view_task(
+      ::greptime::v1::meta::CreateViewTask* create_view_task);
+  ::greptime::v1::meta::CreateViewTask* unsafe_arena_release_create_view_task();
+
+  // .greptime.v1.meta.DropViewTask drop_view_task = 14;
+  bool has_drop_view_task() const;
+  private:
+  bool _internal_has_drop_view_task() const;
+  public:
+  void clear_drop_view_task();
+  const ::greptime::v1::meta::DropViewTask& drop_view_task() const;
+  PROTOBUF_NODISCARD ::greptime::v1::meta::DropViewTask* release_drop_view_task();
+  ::greptime::v1::meta::DropViewTask* mutable_drop_view_task();
+  void set_allocated_drop_view_task(::greptime::v1::meta::DropViewTask* drop_view_task);
+  private:
+  const ::greptime::v1::meta::DropViewTask& _internal_drop_view_task() const;
+  ::greptime::v1::meta::DropViewTask* _internal_mutable_drop_view_task();
+  public:
+  void unsafe_arena_set_allocated_drop_view_task(
+      ::greptime::v1::meta::DropViewTask* drop_view_task);
+  ::greptime::v1::meta::DropViewTask* unsafe_arena_release_drop_view_task();
+
   void clear_task();
   TaskCase task_case() const;
   // @@protoc_insertion_point(class_scope:greptime.v1.meta.DdlTaskRequest)
@@ -2303,6 +2681,8 @@ class DdlTaskRequest final :
   void set_has_create_database_task();
   void set_has_create_flow_task();
   void set_has_drop_flow_task();
+  void set_has_create_view_task();
+  void set_has_drop_view_task();
 
   inline bool has_task() const;
   inline void clear_has_task();
@@ -2327,6 +2707,8 @@ class DdlTaskRequest final :
       ::greptime::v1::meta::CreateDatabaseTask* create_database_task_;
       ::greptime::v1::meta::CreateFlowTask* create_flow_task_;
       ::greptime::v1::meta::DropFlowTask* drop_flow_task_;
+      ::greptime::v1::meta::CreateViewTask* create_view_task_;
+      ::greptime::v1::meta::DropViewTask* drop_view_task_;
     } task_;
     mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
     uint32_t _oneof_case_[1];
@@ -2385,7 +2767,7 @@ class DdlTaskResponse final :
                &_DdlTaskResponse_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    12;
+    14;
 
   friend void swap(DdlTaskResponse& a, DdlTaskResponse& b) {
     a.Swap(&b);
@@ -3492,6 +3874,234 @@ inline void DropFlowTask::set_allocated_drop_flow(::greptime::v1::DropFlowExpr*
 
 // -------------------------------------------------------------------
 
+// CreateViewTask
+
+// .greptime.v1.CreateViewExpr create_view = 1;
+inline bool CreateViewTask::_internal_has_create_view() const {
+  return this != internal_default_instance() && _impl_.create_view_ != nullptr;
+}
+inline bool CreateViewTask::has_create_view() const {
+  return _internal_has_create_view();
+}
+inline const ::greptime::v1::CreateViewExpr& CreateViewTask::_internal_create_view() const {
+  const ::greptime::v1::CreateViewExpr* p = _impl_.create_view_;
+  return p != nullptr ? *p : reinterpret_cast<const ::greptime::v1::CreateViewExpr&>(
+      ::greptime::v1::_CreateViewExpr_default_instance_);
+}
+inline const ::greptime::v1::CreateViewExpr& CreateViewTask::create_view() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.meta.CreateViewTask.create_view)
+  return _internal_create_view();
+}
+inline void CreateViewTask::unsafe_arena_set_allocated_create_view(
+    ::greptime::v1::CreateViewExpr* create_view) {
+  if (GetArenaForAllocation() == nullptr) {
+    delete reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(_impl_.create_view_);
+  }
+  _impl_.create_view_ = create_view;
+  if (create_view) {
+    
+  } else {
+    
+  }
+  // @@protoc_insertion_point(field_unsafe_arena_set_allocated:greptime.v1.meta.CreateViewTask.create_view)
+}
+inline ::greptime::v1::CreateViewExpr* CreateViewTask::release_create_view() {
+  
+  ::greptime::v1::CreateViewExpr* temp = _impl_.create_view_;
+  _impl_.create_view_ = 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::CreateViewExpr* CreateViewTask::unsafe_arena_release_create_view() {
+  // @@protoc_insertion_point(field_release:greptime.v1.meta.CreateViewTask.create_view)
+  
+  ::greptime::v1::CreateViewExpr* temp = _impl_.create_view_;
+  _impl_.create_view_ = nullptr;
+  return temp;
+}
+inline ::greptime::v1::CreateViewExpr* CreateViewTask::_internal_mutable_create_view() {
+  
+  if (_impl_.create_view_ == nullptr) {
+    auto* p = CreateMaybeMessage<::greptime::v1::CreateViewExpr>(GetArenaForAllocation());
+    _impl_.create_view_ = p;
+  }
+  return _impl_.create_view_;
+}
+inline ::greptime::v1::CreateViewExpr* CreateViewTask::mutable_create_view() {
+  ::greptime::v1::CreateViewExpr* _msg = _internal_mutable_create_view();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.meta.CreateViewTask.create_view)
+  return _msg;
+}
+inline void CreateViewTask::set_allocated_create_view(::greptime::v1::CreateViewExpr* create_view) {
+  ::PROTOBUF_NAMESPACE_ID::Arena* message_arena = GetArenaForAllocation();
+  if (message_arena == nullptr) {
+    delete reinterpret_cast< ::PROTOBUF_NAMESPACE_ID::MessageLite*>(_impl_.create_view_);
+  }
+  if (create_view) {
+    ::PROTOBUF_NAMESPACE_ID::Arena* submessage_arena =
+        ::PROTOBUF_NAMESPACE_ID::Arena::InternalGetOwningArena(
+                reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(create_view));
+    if (message_arena != submessage_arena) {
+      create_view = ::PROTOBUF_NAMESPACE_ID::internal::GetOwnedMessage(
+          message_arena, create_view, submessage_arena);
+    }
+    
+  } else {
+    
+  }
+  _impl_.create_view_ = create_view;
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.meta.CreateViewTask.create_view)
+}
+
+// bytes view_info = 2;
+inline void CreateViewTask::clear_view_info() {
+  _impl_.view_info_.ClearToEmpty();
+}
+inline const std::string& CreateViewTask::view_info() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.meta.CreateViewTask.view_info)
+  return _internal_view_info();
+}
+template <typename ArgT0, typename... ArgT>
+inline PROTOBUF_ALWAYS_INLINE
+void CreateViewTask::set_view_info(ArgT0&& arg0, ArgT... args) {
+ 
+ _impl_.view_info_.SetBytes(static_cast<ArgT0 &&>(arg0), args..., GetArenaForAllocation());
+  // @@protoc_insertion_point(field_set:greptime.v1.meta.CreateViewTask.view_info)
+}
+inline std::string* CreateViewTask::mutable_view_info() {
+  std::string* _s = _internal_mutable_view_info();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.meta.CreateViewTask.view_info)
+  return _s;
+}
+inline const std::string& CreateViewTask::_internal_view_info() const {
+  return _impl_.view_info_.Get();
+}
+inline void CreateViewTask::_internal_set_view_info(const std::string& value) {
+  
+  _impl_.view_info_.Set(value, GetArenaForAllocation());
+}
+inline std::string* CreateViewTask::_internal_mutable_view_info() {
+  
+  return _impl_.view_info_.Mutable(GetArenaForAllocation());
+}
+inline std::string* CreateViewTask::release_view_info() {
+  // @@protoc_insertion_point(field_release:greptime.v1.meta.CreateViewTask.view_info)
+  return _impl_.view_info_.Release();
+}
+inline void CreateViewTask::set_allocated_view_info(std::string* view_info) {
+  if (view_info != nullptr) {
+    
+  } else {
+    
+  }
+  _impl_.view_info_.SetAllocated(view_info, GetArenaForAllocation());
+#ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  if (_impl_.view_info_.IsDefault()) {
+    _impl_.view_info_.Set("", GetArenaForAllocation());
+  }
+#endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.meta.CreateViewTask.view_info)
+}
+
+// -------------------------------------------------------------------
+
+// DropViewTask
+
+// .greptime.v1.DropViewExpr drop_view = 1;
+inline bool DropViewTask::_internal_has_drop_view() const {
+  return this != internal_default_instance() && _impl_.drop_view_ != nullptr;
+}
+inline bool DropViewTask::has_drop_view() const {
+  return _internal_has_drop_view();
+}
+inline const ::greptime::v1::DropViewExpr& DropViewTask::_internal_drop_view() const {
+  const ::greptime::v1::DropViewExpr* p = _impl_.drop_view_;
+  return p != nullptr ? *p : reinterpret_cast<const ::greptime::v1::DropViewExpr&>(
+      ::greptime::v1::_DropViewExpr_default_instance_);
+}
+inline const ::greptime::v1::DropViewExpr& DropViewTask::drop_view() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.meta.DropViewTask.drop_view)
+  return _internal_drop_view();
+}
+inline void DropViewTask::unsafe_arena_set_allocated_drop_view(
+    ::greptime::v1::DropViewExpr* drop_view) {
+  if (GetArenaForAllocation() == nullptr) {
+    delete reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(_impl_.drop_view_);
+  }
+  _impl_.drop_view_ = drop_view;
+  if (drop_view) {
+    
+  } else {
+    
+  }
+  // @@protoc_insertion_point(field_unsafe_arena_set_allocated:greptime.v1.meta.DropViewTask.drop_view)
+}
+inline ::greptime::v1::DropViewExpr* DropViewTask::release_drop_view() {
+  
+  ::greptime::v1::DropViewExpr* temp = _impl_.drop_view_;
+  _impl_.drop_view_ = 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::DropViewExpr* DropViewTask::unsafe_arena_release_drop_view() {
+  // @@protoc_insertion_point(field_release:greptime.v1.meta.DropViewTask.drop_view)
+  
+  ::greptime::v1::DropViewExpr* temp = _impl_.drop_view_;
+  _impl_.drop_view_ = nullptr;
+  return temp;
+}
+inline ::greptime::v1::DropViewExpr* DropViewTask::_internal_mutable_drop_view() {
+  
+  if (_impl_.drop_view_ == nullptr) {
+    auto* p = CreateMaybeMessage<::greptime::v1::DropViewExpr>(GetArenaForAllocation());
+    _impl_.drop_view_ = p;
+  }
+  return _impl_.drop_view_;
+}
+inline ::greptime::v1::DropViewExpr* DropViewTask::mutable_drop_view() {
+  ::greptime::v1::DropViewExpr* _msg = _internal_mutable_drop_view();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.meta.DropViewTask.drop_view)
+  return _msg;
+}
+inline void DropViewTask::set_allocated_drop_view(::greptime::v1::DropViewExpr* drop_view) {
+  ::PROTOBUF_NAMESPACE_ID::Arena* message_arena = GetArenaForAllocation();
+  if (message_arena == nullptr) {
+    delete reinterpret_cast< ::PROTOBUF_NAMESPACE_ID::MessageLite*>(_impl_.drop_view_);
+  }
+  if (drop_view) {
+    ::PROTOBUF_NAMESPACE_ID::Arena* submessage_arena =
+        ::PROTOBUF_NAMESPACE_ID::Arena::InternalGetOwningArena(
+                reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(drop_view));
+    if (message_arena != submessage_arena) {
+      drop_view = ::PROTOBUF_NAMESPACE_ID::internal::GetOwnedMessage(
+          message_arena, drop_view, submessage_arena);
+    }
+    
+  } else {
+    
+  }
+  _impl_.drop_view_ = drop_view;
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.meta.DropViewTask.drop_view)
+}
+
+// -------------------------------------------------------------------
+
 // DdlTaskRequest
 
 // .greptime.v1.meta.RequestHeader header = 1;
@@ -4478,6 +5088,154 @@ inline ::greptime::v1::meta::DropFlowTask* DdlTaskRequest::mutable_drop_flow_tas
   return _msg;
 }
 
+// .greptime.v1.meta.CreateViewTask create_view_task = 13;
+inline bool DdlTaskRequest::_internal_has_create_view_task() const {
+  return task_case() == kCreateViewTask;
+}
+inline bool DdlTaskRequest::has_create_view_task() const {
+  return _internal_has_create_view_task();
+}
+inline void DdlTaskRequest::set_has_create_view_task() {
+  _impl_._oneof_case_[0] = kCreateViewTask;
+}
+inline void DdlTaskRequest::clear_create_view_task() {
+  if (_internal_has_create_view_task()) {
+    if (GetArenaForAllocation() == nullptr) {
+      delete _impl_.task_.create_view_task_;
+    }
+    clear_has_task();
+  }
+}
+inline ::greptime::v1::meta::CreateViewTask* DdlTaskRequest::release_create_view_task() {
+  // @@protoc_insertion_point(field_release:greptime.v1.meta.DdlTaskRequest.create_view_task)
+  if (_internal_has_create_view_task()) {
+    clear_has_task();
+    ::greptime::v1::meta::CreateViewTask* temp = _impl_.task_.create_view_task_;
+    if (GetArenaForAllocation() != nullptr) {
+      temp = ::PROTOBUF_NAMESPACE_ID::internal::DuplicateIfNonNull(temp);
+    }
+    _impl_.task_.create_view_task_ = nullptr;
+    return temp;
+  } else {
+    return nullptr;
+  }
+}
+inline const ::greptime::v1::meta::CreateViewTask& DdlTaskRequest::_internal_create_view_task() const {
+  return _internal_has_create_view_task()
+      ? *_impl_.task_.create_view_task_
+      : reinterpret_cast< ::greptime::v1::meta::CreateViewTask&>(::greptime::v1::meta::_CreateViewTask_default_instance_);
+}
+inline const ::greptime::v1::meta::CreateViewTask& DdlTaskRequest::create_view_task() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.meta.DdlTaskRequest.create_view_task)
+  return _internal_create_view_task();
+}
+inline ::greptime::v1::meta::CreateViewTask* DdlTaskRequest::unsafe_arena_release_create_view_task() {
+  // @@protoc_insertion_point(field_unsafe_arena_release:greptime.v1.meta.DdlTaskRequest.create_view_task)
+  if (_internal_has_create_view_task()) {
+    clear_has_task();
+    ::greptime::v1::meta::CreateViewTask* temp = _impl_.task_.create_view_task_;
+    _impl_.task_.create_view_task_ = nullptr;
+    return temp;
+  } else {
+    return nullptr;
+  }
+}
+inline void DdlTaskRequest::unsafe_arena_set_allocated_create_view_task(::greptime::v1::meta::CreateViewTask* create_view_task) {
+  clear_task();
+  if (create_view_task) {
+    set_has_create_view_task();
+    _impl_.task_.create_view_task_ = create_view_task;
+  }
+  // @@protoc_insertion_point(field_unsafe_arena_set_allocated:greptime.v1.meta.DdlTaskRequest.create_view_task)
+}
+inline ::greptime::v1::meta::CreateViewTask* DdlTaskRequest::_internal_mutable_create_view_task() {
+  if (!_internal_has_create_view_task()) {
+    clear_task();
+    set_has_create_view_task();
+    _impl_.task_.create_view_task_ = CreateMaybeMessage< ::greptime::v1::meta::CreateViewTask >(GetArenaForAllocation());
+  }
+  return _impl_.task_.create_view_task_;
+}
+inline ::greptime::v1::meta::CreateViewTask* DdlTaskRequest::mutable_create_view_task() {
+  ::greptime::v1::meta::CreateViewTask* _msg = _internal_mutable_create_view_task();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.meta.DdlTaskRequest.create_view_task)
+  return _msg;
+}
+
+// .greptime.v1.meta.DropViewTask drop_view_task = 14;
+inline bool DdlTaskRequest::_internal_has_drop_view_task() const {
+  return task_case() == kDropViewTask;
+}
+inline bool DdlTaskRequest::has_drop_view_task() const {
+  return _internal_has_drop_view_task();
+}
+inline void DdlTaskRequest::set_has_drop_view_task() {
+  _impl_._oneof_case_[0] = kDropViewTask;
+}
+inline void DdlTaskRequest::clear_drop_view_task() {
+  if (_internal_has_drop_view_task()) {
+    if (GetArenaForAllocation() == nullptr) {
+      delete _impl_.task_.drop_view_task_;
+    }
+    clear_has_task();
+  }
+}
+inline ::greptime::v1::meta::DropViewTask* DdlTaskRequest::release_drop_view_task() {
+  // @@protoc_insertion_point(field_release:greptime.v1.meta.DdlTaskRequest.drop_view_task)
+  if (_internal_has_drop_view_task()) {
+    clear_has_task();
+    ::greptime::v1::meta::DropViewTask* temp = _impl_.task_.drop_view_task_;
+    if (GetArenaForAllocation() != nullptr) {
+      temp = ::PROTOBUF_NAMESPACE_ID::internal::DuplicateIfNonNull(temp);
+    }
+    _impl_.task_.drop_view_task_ = nullptr;
+    return temp;
+  } else {
+    return nullptr;
+  }
+}
+inline const ::greptime::v1::meta::DropViewTask& DdlTaskRequest::_internal_drop_view_task() const {
+  return _internal_has_drop_view_task()
+      ? *_impl_.task_.drop_view_task_
+      : reinterpret_cast< ::greptime::v1::meta::DropViewTask&>(::greptime::v1::meta::_DropViewTask_default_instance_);
+}
+inline const ::greptime::v1::meta::DropViewTask& DdlTaskRequest::drop_view_task() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.meta.DdlTaskRequest.drop_view_task)
+  return _internal_drop_view_task();
+}
+inline ::greptime::v1::meta::DropViewTask* DdlTaskRequest::unsafe_arena_release_drop_view_task() {
+  // @@protoc_insertion_point(field_unsafe_arena_release:greptime.v1.meta.DdlTaskRequest.drop_view_task)
+  if (_internal_has_drop_view_task()) {
+    clear_has_task();
+    ::greptime::v1::meta::DropViewTask* temp = _impl_.task_.drop_view_task_;
+    _impl_.task_.drop_view_task_ = nullptr;
+    return temp;
+  } else {
+    return nullptr;
+  }
+}
+inline void DdlTaskRequest::unsafe_arena_set_allocated_drop_view_task(::greptime::v1::meta::DropViewTask* drop_view_task) {
+  clear_task();
+  if (drop_view_task) {
+    set_has_drop_view_task();
+    _impl_.task_.drop_view_task_ = drop_view_task;
+  }
+  // @@protoc_insertion_point(field_unsafe_arena_set_allocated:greptime.v1.meta.DdlTaskRequest.drop_view_task)
+}
+inline ::greptime::v1::meta::DropViewTask* DdlTaskRequest::_internal_mutable_drop_view_task() {
+  if (!_internal_has_drop_view_task()) {
+    clear_task();
+    set_has_drop_view_task();
+    _impl_.task_.drop_view_task_ = CreateMaybeMessage< ::greptime::v1::meta::DropViewTask >(GetArenaForAllocation());
+  }
+  return _impl_.task_.drop_view_task_;
+}
+inline ::greptime::v1::meta::DropViewTask* DdlTaskRequest::mutable_drop_view_task() {
+  ::greptime::v1::meta::DropViewTask* _msg = _internal_mutable_drop_view_task();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.meta.DdlTaskRequest.drop_view_task)
+  return _msg;
+}
+
 inline bool DdlTaskRequest::has_task() const {
   return task_case() != TASK_NOT_SET;
 }
@@ -4810,6 +5568,10 @@ DdlTaskResponse::table_ids() const {
 
 // -------------------------------------------------------------------
 
+// -------------------------------------------------------------------
+
+// -------------------------------------------------------------------
+
 
 // @@protoc_insertion_point(namespace_scope)
 

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

@@ -614,6 +614,110 @@ func (x *DropFlowTask) GetDropFlow() *v1.DropFlowExpr {
 	return nil
 }
 
+// Create a view task
+type CreateViewTask struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	CreateView *v1.CreateViewExpr `protobuf:"bytes,1,opt,name=create_view,json=createView,proto3" json:"create_view,omitempty"`
+	ViewInfo   []byte             `protobuf:"bytes,2,opt,name=view_info,json=viewInfo,proto3" json:"view_info,omitempty"`
+}
+
+func (x *CreateViewTask) Reset() {
+	*x = CreateViewTask{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[11]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CreateViewTask) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CreateViewTask) ProtoMessage() {}
+
+func (x *CreateViewTask) ProtoReflect() protoreflect.Message {
+	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 {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use CreateViewTask.ProtoReflect.Descriptor instead.
+func (*CreateViewTask) Descriptor() ([]byte, []int) {
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{11}
+}
+
+func (x *CreateViewTask) GetCreateView() *v1.CreateViewExpr {
+	if x != nil {
+		return x.CreateView
+	}
+	return nil
+}
+
+func (x *CreateViewTask) GetViewInfo() []byte {
+	if x != nil {
+		return x.ViewInfo
+	}
+	return nil
+}
+
+// Drop a view task
+type DropViewTask struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	DropView *v1.DropViewExpr `protobuf:"bytes,1,opt,name=drop_view,json=dropView,proto3" json:"drop_view,omitempty"`
+}
+
+func (x *DropViewTask) Reset() {
+	*x = DropViewTask{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[12]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *DropViewTask) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*DropViewTask) ProtoMessage() {}
+
+func (x *DropViewTask) ProtoReflect() protoreflect.Message {
+	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 {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use DropViewTask.ProtoReflect.Descriptor instead.
+func (*DropViewTask) Descriptor() ([]byte, []int) {
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{12}
+}
+
+func (x *DropViewTask) GetDropView() *v1.DropViewExpr {
+	if x != nil {
+		return x.DropView
+	}
+	return nil
+}
+
 type DdlTaskRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -634,13 +738,15 @@ type DdlTaskRequest struct {
 	//	*DdlTaskRequest_CreateDatabaseTask
 	//	*DdlTaskRequest_CreateFlowTask
 	//	*DdlTaskRequest_DropFlowTask
+	//	*DdlTaskRequest_CreateViewTask
+	//	*DdlTaskRequest_DropViewTask
 	Task isDdlTaskRequest_Task `protobuf_oneof:"task"`
 }
 
 func (x *DdlTaskRequest) Reset() {
 	*x = DdlTaskRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[11]
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[13]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -653,7 +759,7 @@ func (x *DdlTaskRequest) String() string {
 func (*DdlTaskRequest) ProtoMessage() {}
 
 func (x *DdlTaskRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[11]
+	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[13]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -666,7 +772,7 @@ 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{11}
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{13}
 }
 
 func (x *DdlTaskRequest) GetHeader() *RequestHeader {
@@ -767,6 +873,20 @@ func (x *DdlTaskRequest) GetDropFlowTask() *DropFlowTask {
 	return nil
 }
 
+func (x *DdlTaskRequest) GetCreateViewTask() *CreateViewTask {
+	if x, ok := x.GetTask().(*DdlTaskRequest_CreateViewTask); ok {
+		return x.CreateViewTask
+	}
+	return nil
+}
+
+func (x *DdlTaskRequest) GetDropViewTask() *DropViewTask {
+	if x, ok := x.GetTask().(*DdlTaskRequest_DropViewTask); ok {
+		return x.DropViewTask
+	}
+	return nil
+}
+
 type isDdlTaskRequest_Task interface {
 	isDdlTaskRequest_Task()
 }
@@ -815,6 +935,14 @@ type DdlTaskRequest_DropFlowTask struct {
 	DropFlowTask *DropFlowTask `protobuf:"bytes,12,opt,name=drop_flow_task,json=dropFlowTask,proto3,oneof"`
 }
 
+type DdlTaskRequest_CreateViewTask struct {
+	CreateViewTask *CreateViewTask `protobuf:"bytes,13,opt,name=create_view_task,json=createViewTask,proto3,oneof"`
+}
+
+type DdlTaskRequest_DropViewTask struct {
+	DropViewTask *DropViewTask `protobuf:"bytes,14,opt,name=drop_view_task,json=dropViewTask,proto3,oneof"`
+}
+
 func (*DdlTaskRequest_CreateTableTask) isDdlTaskRequest_Task() {}
 
 func (*DdlTaskRequest_DropTableTask) isDdlTaskRequest_Task() {}
@@ -837,6 +965,10 @@ func (*DdlTaskRequest_CreateFlowTask) isDdlTaskRequest_Task() {}
 
 func (*DdlTaskRequest_DropFlowTask) isDdlTaskRequest_Task() {}
 
+func (*DdlTaskRequest_CreateViewTask) isDdlTaskRequest_Task() {}
+
+func (*DdlTaskRequest_DropViewTask) isDdlTaskRequest_Task() {}
+
 type DdlTaskResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -854,7 +986,7 @@ type DdlTaskResponse struct {
 func (x *DdlTaskResponse) Reset() {
 	*x = DdlTaskResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[12]
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[14]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -867,7 +999,7 @@ func (x *DdlTaskResponse) String() string {
 func (*DdlTaskResponse) ProtoMessage() {}
 
 func (x *DdlTaskResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[12]
+	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[14]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -880,7 +1012,7 @@ 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{12}
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{14}
 }
 
 func (x *DdlTaskResponse) GetHeader() *ResponseHeader {
@@ -985,92 +1117,113 @@ var file_greptime_v1_meta_ddl_proto_rawDesc = []byte{
 	0x70, 0x5f, 0x66, 0x6c, 0x6f, 0x77, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x19, 0x2e, 0x67,
 	0x72, 0x65, 0x70, 0x74, 0x69, 0x6d, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x44, 0x72, 0x6f, 0x70, 0x46,
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+	0x77, 0x22, 0x6b, 0x0a, 0x0e, 0x43, 0x72, 0x65, 0x61, 0x74, 0x65, 0x56, 0x69, 0x65, 0x77, 0x54,
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 }
 
 var (
@@ -1086,7 +1239,7 @@ 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, 13)
+var file_greptime_v1_meta_ddl_proto_msgTypes = make([]protoimpl.MessageInfo, 15)
 var file_greptime_v1_meta_ddl_proto_goTypes = []interface{}{
 	(DdlTaskType)(0),              // 0: greptime.v1.meta.DdlTaskType
 	(*CreateDatabaseTask)(nil),    // 1: greptime.v1.meta.CreateDatabaseTask
@@ -1100,58 +1253,66 @@ var file_greptime_v1_meta_ddl_proto_goTypes = []interface{}{
 	(*DropDatabaseTask)(nil),      // 9: greptime.v1.meta.DropDatabaseTask
 	(*CreateFlowTask)(nil),        // 10: greptime.v1.meta.CreateFlowTask
 	(*DropFlowTask)(nil),          // 11: greptime.v1.meta.DropFlowTask
-	(*DdlTaskRequest)(nil),        // 12: greptime.v1.meta.DdlTaskRequest
+	(*CreateViewTask)(nil),        // 12: greptime.v1.meta.CreateViewTask
-	(*DdlTaskResponse)(nil),       // 13: greptime.v1.meta.DdlTaskResponse
+	(*DropViewTask)(nil),          // 13: greptime.v1.meta.DropViewTask
-	(*v1.CreateDatabaseExpr)(nil), // 14: greptime.v1.CreateDatabaseExpr
+	(*DdlTaskRequest)(nil),        // 14: greptime.v1.meta.DdlTaskRequest
-	(*v1.CreateTableExpr)(nil),    // 15: greptime.v1.CreateTableExpr
+	(*DdlTaskResponse)(nil),       // 15: greptime.v1.meta.DdlTaskResponse
-	(*Partition)(nil),             // 16: greptime.v1.meta.Partition
+	(*v1.CreateDatabaseExpr)(nil), // 16: greptime.v1.CreateDatabaseExpr
-	(*v1.DropTableExpr)(nil),      // 17: greptime.v1.DropTableExpr
+	(*v1.CreateTableExpr)(nil),    // 17: greptime.v1.CreateTableExpr
-	(*v1.AlterExpr)(nil),          // 18: greptime.v1.AlterExpr
+	(*Partition)(nil),             // 18: greptime.v1.meta.Partition
-	(*v1.TruncateTableExpr)(nil),  // 19: greptime.v1.TruncateTableExpr
+	(*v1.DropTableExpr)(nil),      // 19: greptime.v1.DropTableExpr
-	(*v1.DropDatabaseExpr)(nil),   // 20: greptime.v1.DropDatabaseExpr
+	(*v1.AlterExpr)(nil),          // 20: greptime.v1.AlterExpr
-	(*v1.CreateFlowExpr)(nil),     // 21: greptime.v1.CreateFlowExpr
+	(*v1.TruncateTableExpr)(nil),  // 21: greptime.v1.TruncateTableExpr
-	(*v1.DropFlowExpr)(nil),       // 22: greptime.v1.DropFlowExpr
+	(*v1.DropDatabaseExpr)(nil),   // 22: greptime.v1.DropDatabaseExpr
-	(*RequestHeader)(nil),         // 23: greptime.v1.meta.RequestHeader
+	(*v1.CreateFlowExpr)(nil),     // 23: greptime.v1.CreateFlowExpr
-	(*v1.QueryContext)(nil),       // 24: greptime.v1.QueryContext
+	(*v1.DropFlowExpr)(nil),       // 24: greptime.v1.DropFlowExpr
-	(*ResponseHeader)(nil),        // 25: greptime.v1.meta.ResponseHeader
+	(*v1.CreateViewExpr)(nil),     // 25: greptime.v1.CreateViewExpr
-	(*ProcedureId)(nil),           // 26: greptime.v1.meta.ProcedureId
+	(*v1.DropViewExpr)(nil),       // 26: greptime.v1.DropViewExpr
-	(*v1.TableId)(nil),            // 27: greptime.v1.TableId
+	(*RequestHeader)(nil),         // 27: greptime.v1.meta.RequestHeader
+	(*v1.QueryContext)(nil),       // 28: greptime.v1.QueryContext
+	(*ResponseHeader)(nil),        // 29: greptime.v1.meta.ResponseHeader
+	(*ProcedureId)(nil),           // 30: greptime.v1.meta.ProcedureId
+	(*v1.TableId)(nil),            // 31: greptime.v1.TableId
 }
 var file_greptime_v1_meta_ddl_proto_depIdxs = []int32{
-	14, // 0: greptime.v1.meta.CreateDatabaseTask.create_database:type_name -> greptime.v1.CreateDatabaseExpr
+	16, // 0: greptime.v1.meta.CreateDatabaseTask.create_database:type_name -> greptime.v1.CreateDatabaseExpr
-	15, // 1: greptime.v1.meta.CreateTableTask.create_table:type_name -> greptime.v1.CreateTableExpr
+	17, // 1: greptime.v1.meta.CreateTableTask.create_table:type_name -> greptime.v1.CreateTableExpr
-	16, // 2: greptime.v1.meta.CreateTableTask.partitions:type_name -> greptime.v1.meta.Partition
+	18, // 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
-	17, // 4: greptime.v1.meta.DropTableTask.drop_table:type_name -> greptime.v1.DropTableExpr
+	19, // 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
-	18, // 6: greptime.v1.meta.AlterTableTask.alter_table:type_name -> greptime.v1.AlterExpr
+	20, // 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
-	19, // 8: greptime.v1.meta.TruncateTableTask.truncate_table:type_name -> greptime.v1.TruncateTableExpr
+	21, // 8: greptime.v1.meta.TruncateTableTask.truncate_table:type_name -> greptime.v1.TruncateTableExpr
-	20, // 9: greptime.v1.meta.DropDatabaseTask.drop_database:type_name -> greptime.v1.DropDatabaseExpr
+	22, // 9: greptime.v1.meta.DropDatabaseTask.drop_database:type_name -> greptime.v1.DropDatabaseExpr
-	21, // 10: greptime.v1.meta.CreateFlowTask.create_flow:type_name -> greptime.v1.CreateFlowExpr
+	23, // 10: greptime.v1.meta.CreateFlowTask.create_flow:type_name -> greptime.v1.CreateFlowExpr
-	22, // 11: greptime.v1.meta.DropFlowTask.drop_flow:type_name -> greptime.v1.DropFlowExpr
+	24, // 11: greptime.v1.meta.DropFlowTask.drop_flow:type_name -> greptime.v1.DropFlowExpr
-	23, // 12: greptime.v1.meta.DdlTaskRequest.header:type_name -> greptime.v1.meta.RequestHeader
+	25, // 12: greptime.v1.meta.CreateViewTask.create_view:type_name -> greptime.v1.CreateViewExpr
-	24, // 13: greptime.v1.meta.DdlTaskRequest.query_context:type_name -> greptime.v1.QueryContext
+	26, // 13: greptime.v1.meta.DropViewTask.drop_view:type_name -> greptime.v1.DropViewExpr
-	2,  // 14: greptime.v1.meta.DdlTaskRequest.create_table_task:type_name -> greptime.v1.meta.CreateTableTask
+	27, // 14: greptime.v1.meta.DdlTaskRequest.header:type_name -> greptime.v1.meta.RequestHeader
-	4,  // 15: greptime.v1.meta.DdlTaskRequest.drop_table_task:type_name -> greptime.v1.meta.DropTableTask
+	28, // 15: greptime.v1.meta.DdlTaskRequest.query_context:type_name -> greptime.v1.QueryContext
-	6,  // 16: greptime.v1.meta.DdlTaskRequest.alter_table_task:type_name -> greptime.v1.meta.AlterTableTask
+	2,  // 16: greptime.v1.meta.DdlTaskRequest.create_table_task:type_name -> greptime.v1.meta.CreateTableTask
-	8,  // 17: greptime.v1.meta.DdlTaskRequest.truncate_table_task:type_name -> greptime.v1.meta.TruncateTableTask
+	4,  // 17: greptime.v1.meta.DdlTaskRequest.drop_table_task:type_name -> greptime.v1.meta.DropTableTask
-	3,  // 18: greptime.v1.meta.DdlTaskRequest.create_table_tasks:type_name -> greptime.v1.meta.CreateTableTasks
+	6,  // 18: greptime.v1.meta.DdlTaskRequest.alter_table_task:type_name -> greptime.v1.meta.AlterTableTask
-	5,  // 19: greptime.v1.meta.DdlTaskRequest.drop_table_tasks:type_name -> greptime.v1.meta.DropTableTasks
+	8,  // 19: greptime.v1.meta.DdlTaskRequest.truncate_table_task:type_name -> greptime.v1.meta.TruncateTableTask
-	7,  // 20: greptime.v1.meta.DdlTaskRequest.alter_table_tasks:type_name -> greptime.v1.meta.AlterTableTasks
+	3,  // 20: greptime.v1.meta.DdlTaskRequest.create_table_tasks:type_name -> greptime.v1.meta.CreateTableTasks
-	9,  // 21: greptime.v1.meta.DdlTaskRequest.drop_database_task:type_name -> greptime.v1.meta.DropDatabaseTask
+	5,  // 21: greptime.v1.meta.DdlTaskRequest.drop_table_tasks:type_name -> greptime.v1.meta.DropTableTasks
-	1,  // 22: greptime.v1.meta.DdlTaskRequest.create_database_task:type_name -> greptime.v1.meta.CreateDatabaseTask
+	7,  // 22: greptime.v1.meta.DdlTaskRequest.alter_table_tasks:type_name -> greptime.v1.meta.AlterTableTasks
-	10, // 23: greptime.v1.meta.DdlTaskRequest.create_flow_task:type_name -> greptime.v1.meta.CreateFlowTask
+	9,  // 23: greptime.v1.meta.DdlTaskRequest.drop_database_task:type_name -> greptime.v1.meta.DropDatabaseTask
-	11, // 24: greptime.v1.meta.DdlTaskRequest.drop_flow_task:type_name -> greptime.v1.meta.DropFlowTask
+	1,  // 24: greptime.v1.meta.DdlTaskRequest.create_database_task:type_name -> greptime.v1.meta.CreateDatabaseTask
-	25, // 25: greptime.v1.meta.DdlTaskResponse.header:type_name -> greptime.v1.meta.ResponseHeader
+	10, // 25: greptime.v1.meta.DdlTaskRequest.create_flow_task:type_name -> greptime.v1.meta.CreateFlowTask
-	26, // 26: greptime.v1.meta.DdlTaskResponse.pid:type_name -> greptime.v1.meta.ProcedureId
+	11, // 26: greptime.v1.meta.DdlTaskRequest.drop_flow_task:type_name -> greptime.v1.meta.DropFlowTask
-	27, // 27: greptime.v1.meta.DdlTaskResponse.table_id:type_name -> greptime.v1.TableId
+	12, // 27: greptime.v1.meta.DdlTaskRequest.create_view_task:type_name -> greptime.v1.meta.CreateViewTask
-	27, // 28: greptime.v1.meta.DdlTaskResponse.table_ids:type_name -> greptime.v1.TableId
+	13, // 28: greptime.v1.meta.DdlTaskRequest.drop_view_task:type_name -> greptime.v1.meta.DropViewTask
-	29, // [29:29] is the sub-list for method output_type
+	29, // 29: greptime.v1.meta.DdlTaskResponse.header:type_name -> greptime.v1.meta.ResponseHeader
-	29, // [29:29] is the sub-list for method input_type
+	30, // 30: greptime.v1.meta.DdlTaskResponse.pid:type_name -> greptime.v1.meta.ProcedureId
-	29, // [29:29] is the sub-list for extension type_name
+	31, // 31: greptime.v1.meta.DdlTaskResponse.table_id:type_name -> greptime.v1.TableId
-	29, // [29:29] is the sub-list for extension extendee
+	31, // 32: greptime.v1.meta.DdlTaskResponse.table_ids:type_name -> greptime.v1.TableId
-	0,  // [0:29] is the sub-list for field type_name
+	33, // [33:33] is the sub-list for method output_type
+	33, // [33:33] is the sub-list for method input_type
+	33, // [33:33] is the sub-list for extension type_name
+	33, // [33:33] is the sub-list for extension extendee
+	0,  // [0:33] is the sub-list for field type_name
 }
 
 func init() { file_greptime_v1_meta_ddl_proto_init() }
@@ -1295,7 +1456,7 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_meta_ddl_proto_msgTypes[11].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DdlTaskRequest); i {
+			switch v := v.(*CreateViewTask); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1307,6 +1468,30 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_meta_ddl_proto_msgTypes[12].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*DropViewTask); 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[13].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[14].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*DdlTaskResponse); i {
 			case 0:
 				return &v.state
@@ -1319,7 +1504,7 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			}
 		}
 	}
-	file_greptime_v1_meta_ddl_proto_msgTypes[11].OneofWrappers = []interface{}{
+	file_greptime_v1_meta_ddl_proto_msgTypes[13].OneofWrappers = []interface{}{
 		(*DdlTaskRequest_CreateTableTask)(nil),
 		(*DdlTaskRequest_DropTableTask)(nil),
 		(*DdlTaskRequest_AlterTableTask)(nil),
@@ -1331,6 +1516,8 @@ func file_greptime_v1_meta_ddl_proto_init() {
 		(*DdlTaskRequest_CreateDatabaseTask)(nil),
 		(*DdlTaskRequest_CreateFlowTask)(nil),
 		(*DdlTaskRequest_DropFlowTask)(nil),
+		(*DdlTaskRequest_CreateViewTask)(nil),
+		(*DdlTaskRequest_DropViewTask)(nil),
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
@@ -1338,7 +1525,7 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_greptime_v1_meta_ddl_proto_rawDesc,
 			NumEnums:      1,
-			NumMessages:   13,
+			NumMessages:   15,
 			NumExtensions: 0,
 			NumServices:   0,
 		},

proto/greptime/v1/ddl.proto

@@ -35,6 +35,8 @@ message DdlRequest {
     TruncateTableExpr truncate_table = 7;
     CreateFlowExpr create_flow = 8;
     DropFlowExpr drop_flow = 9;
+    CreateViewExpr create_view = 10;
+    DropViewExpr drop_view = 11;
   }
 }
 
@@ -60,6 +62,25 @@ message DropFlowExpr {
   bool drop_if_exists = 5;
 }
 
+// Create a view
+message CreateViewExpr {
+  string catalog_name = 1;
+  string schema_name = 2;
+  string view_name = 3;
+  bytes logical_plan = 4;
+  bool create_if_not_exists = 5;
+  bool or_replace = 6;
+}
+
+// Drop a view
+message DropViewExpr {
+  string catalog_name = 1;
+  string schema_name = 2;
+  string view_name = 3;
+  TableId view_id = 4;
+  bool drop_if_exists = 5;
+}
+
 message CreateTableExpr {
   string catalog_name = 1;
   string schema_name = 2;

proto/greptime/v1/meta/ddl.proto

@@ -68,6 +68,17 @@ message DropFlowTask {
     DropFlowExpr drop_flow = 1;
 }
 
+// Create a view task
+message CreateViewTask {
+    CreateViewExpr create_view = 1;
+    bytes view_info = 2;
+}
+
+// Drop a view task
+message DropViewTask {
+    DropViewExpr drop_view = 1;
+}
+
 message DdlTaskRequest {
     RequestHeader header = 1;
     QueryContext query_context = 64;
@@ -84,6 +95,8 @@ message DdlTaskRequest {
         CreateDatabaseTask create_database_task = 10;
         CreateFlowTask create_flow_task = 11;
         DropFlowTask drop_flow_task = 12;
+        CreateViewTask create_view_task = 13;
+        DropViewTask drop_view_task = 14;
      }
 }