chore: add Metrics in FlightMetadata (#134)

* chore: add metrics to metadata

* chore: update metrics to message

* chore: change string to bytes for backward compatibility

* chore: rebase main

Makefile

@@ -8,7 +8,7 @@ rust:
 	cargo build
 
 go: go-deps
-	docker run -t -w /greptime-proto \
+	docker run --rm -t -w /greptime-proto \
 		--entrypoint ./scripts/generate-go.sh \
 		-v ${PWD}:/greptime-proto ${BUILDER_CONTAINER}
 
@@ -16,11 +16,11 @@ go-deps:
 	go mod download
 
 java:
-	docker run -t -w /greptime-proto \
+	docker run --rm -t -w /greptime-proto \
 		--entrypoint ./scripts/generate-java.sh \
 		-v ${PWD}:/greptime-proto ${BUILDER_CONTAINER}
 
 cpp:
-	docker run -t -w /greptime-proto \
+	docker run --rm -t -w /greptime-proto \
 		--entrypoint ./scripts/generate-cpp.sh \
 		-v ${PWD}:/greptime-proto ${BUILDER_CONTAINER}

c++/greptime/v1/common.pb.cc

@@ -132,9 +132,23 @@ struct AffectedRowsDefaultTypeInternal {
   };
 };
 PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 AffectedRowsDefaultTypeInternal _AffectedRows_default_instance_;
+PROTOBUF_CONSTEXPR Metrics::Metrics(
+    ::_pbi::ConstantInitialized): _impl_{
+    /*decltype(_impl_.metrics_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
+  , /*decltype(_impl_._cached_size_)*/{}} {}
+struct MetricsDefaultTypeInternal {
+  PROTOBUF_CONSTEXPR MetricsDefaultTypeInternal()
+      : _instance(::_pbi::ConstantInitialized{}) {}
+  ~MetricsDefaultTypeInternal() {}
+  union {
+    Metrics _instance;
+  };
+};
+PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 MetricsDefaultTypeInternal _Metrics_default_instance_;
 PROTOBUF_CONSTEXPR FlightMetadata::FlightMetadata(
     ::_pbi::ConstantInitialized): _impl_{
     /*decltype(_impl_.affected_rows_)*/nullptr
+  , /*decltype(_impl_.metrics_)*/nullptr
   , /*decltype(_impl_._cached_size_)*/{}} {}
 struct FlightMetadataDefaultTypeInternal {
   PROTOBUF_CONSTEXPR FlightMetadataDefaultTypeInternal()
@@ -204,7 +218,7 @@ struct DecimalTypeExtensionDefaultTypeInternal {
 PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 DecimalTypeExtensionDefaultTypeInternal _DecimalTypeExtension_default_instance_;
 }  // namespace v1
 }  // namespace greptime
-static ::_pb::Metadata file_level_metadata_greptime_2fv1_2fcommon_2eproto[13];
+static ::_pb::Metadata file_level_metadata_greptime_2fv1_2fcommon_2eproto[14];
 static const ::_pb::EnumDescriptor* file_level_enum_descriptors_greptime_2fv1_2fcommon_2eproto[2];
 static constexpr ::_pb::ServiceDescriptor const** file_level_service_descriptors_greptime_2fv1_2fcommon_2eproto = nullptr;
 
@@ -278,12 +292,20 @@ const uint32_t TableStruct_greptime_2fv1_2fcommon_2eproto::offsets[] PROTOBUF_SE
   ~0u,  // no _inlined_string_donated_
   PROTOBUF_FIELD_OFFSET(::greptime::v1::AffectedRows, _impl_.value_),
   ~0u,  // no _has_bits_
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::Metrics, _internal_metadata_),
+  ~0u,  // no _extensions_
+  ~0u,  // no _oneof_case_
+  ~0u,  // no _weak_field_map_
+  ~0u,  // no _inlined_string_donated_
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::Metrics, _impl_.metrics_),
+  ~0u,  // no _has_bits_
   PROTOBUF_FIELD_OFFSET(::greptime::v1::FlightMetadata, _internal_metadata_),
   ~0u,  // no _extensions_
   ~0u,  // no _oneof_case_
   ~0u,  // no _weak_field_map_
   ~0u,  // no _inlined_string_donated_
   PROTOBUF_FIELD_OFFSET(::greptime::v1::FlightMetadata, _impl_.affected_rows_),
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::FlightMetadata, _impl_.metrics_),
   ~0u,  // no _has_bits_
   PROTOBUF_FIELD_OFFSET(::greptime::v1::IntervalMonthDayNano, _internal_metadata_),
   ~0u,  // no _extensions_
@@ -327,11 +349,12 @@ static const ::_pbi::MigrationSchema schemas[] PROTOBUF_SECTION_VARIABLE(protode
   { 46, -1, -1, sizeof(::greptime::v1::Basic)},
   { 54, -1, -1, sizeof(::greptime::v1::Token)},
   { 61, -1, -1, sizeof(::greptime::v1::AffectedRows)},
-  { 68, -1, -1, sizeof(::greptime::v1::FlightMetadata)},
+  { 68, -1, -1, sizeof(::greptime::v1::Metrics)},
-  { 75, -1, -1, sizeof(::greptime::v1::IntervalMonthDayNano)},
+  { 75, -1, -1, sizeof(::greptime::v1::FlightMetadata)},
-  { 84, -1, -1, sizeof(::greptime::v1::Decimal128)},
+  { 83, -1, -1, sizeof(::greptime::v1::IntervalMonthDayNano)},
-  { 92, -1, -1, sizeof(::greptime::v1::ColumnDataTypeExtension)},
+  { 92, -1, -1, sizeof(::greptime::v1::Decimal128)},
-  { 100, -1, -1, sizeof(::greptime::v1::DecimalTypeExtension)},
+  { 100, -1, -1, sizeof(::greptime::v1::ColumnDataTypeExtension)},
+  { 108, -1, -1, sizeof(::greptime::v1::DecimalTypeExtension)},
 };
 
 static const ::_pb::Message* const file_default_instances[] = {
@@ -343,6 +366,7 @@ static const ::_pb::Message* const file_default_instances[] = {
   &::greptime::v1::_Basic_default_instance_._instance,
   &::greptime::v1::_Token_default_instance_._instance,
   &::greptime::v1::_AffectedRows_default_instance_._instance,
+  &::greptime::v1::_Metrics_default_instance_._instance,
   &::greptime::v1::_FlightMetadata_default_instance_._instance,
   &::greptime::v1::_IntervalMonthDayNano_default_instance_._instance,
   &::greptime::v1::_Decimal128_default_instance_._instance,
@@ -366,39 +390,41 @@ const char descriptor_table_protodef_greptime_2fv1_2fcommon_2eproto[] PROTOBUF_S
   ".v1.TokenH\000B\r\n\013auth_scheme\"+\n\005Basic\022\020\n\010u"
   "sername\030\001 \001(\t\022\020\n\010password\030\002 \001(\t\"\026\n\005Token"
   "\022\r\n\005token\030\001 \001(\t\"\035\n\014AffectedRows\022\r\n\005value"
-  "\030\001 \001(\r\"B\n\016FlightMetadata\0220\n\raffected_row"
+  "\030\001 \001(\r\"\032\n\007Metrics\022\017\n\007metrics\030\001 \001(\014\"i\n\016Fl"
-  "s\030\001 \001(\0132\031.greptime.v1.AffectedRows\"I\n\024In"
+  "ightMetadata\0220\n\raffected_rows\030\001 \001(\0132\031.gr"
-  "tervalMonthDayNano\022\016\n\006months\030\001 \001(\005\022\014\n\004da"
+  "eptime.v1.AffectedRows\022%\n\007metrics\030\002 \001(\0132"
-  "ys\030\002 \001(\005\022\023\n\013nanoseconds\030\003 \001(\003\"$\n\nDecimal"
+  "\024.greptime.v1.Metrics\"I\n\024IntervalMonthDa"
-  "128\022\n\n\002hi\030\001 \001(\003\022\n\n\002lo\030\002 \001(\003\"`\n\027ColumnDat"
+  "yNano\022\016\n\006months\030\001 \001(\005\022\014\n\004days\030\002 \001(\005\022\023\n\013n"
-  "aTypeExtension\0229\n\014decimal_type\030\001 \001(\0132!.g"
+  "anoseconds\030\003 \001(\003\"$\n\nDecimal128\022\n\n\002hi\030\001 \001"
-  "reptime.v1.DecimalTypeExtensionH\000B\n\n\010typ"
+  "(\003\022\n\n\002lo\030\002 \001(\003\"`\n\027ColumnDataTypeExtensio"
-  "e_ext\"8\n\024DecimalTypeExtension\022\021\n\tprecisi"
+  "n\0229\n\014decimal_type\030\001 \001(\0132!.greptime.v1.De"
-  "on\030\001 \001(\005\022\r\n\005scale\030\002 \001(\005*1\n\014SemanticType\022"
+  "cimalTypeExtensionH\000B\n\n\010type_ext\"8\n\024Deci"
-  "\007\n\003TAG\020\000\022\t\n\005FIELD\020\001\022\r\n\tTIMESTAMP\020\002*\270\004\n\016C"
+  "malTypeExtension\022\021\n\tprecision\030\001 \001(\005\022\r\n\005s"
-  "olumnDataType\022\013\n\007BOOLEAN\020\000\022\010\n\004INT8\020\001\022\t\n\005"
+  "cale\030\002 \001(\005*1\n\014SemanticType\022\007\n\003TAG\020\000\022\t\n\005F"
-  "INT16\020\002\022\t\n\005INT32\020\003\022\t\n\005INT64\020\004\022\t\n\005UINT8\020\005"
+  "IELD\020\001\022\r\n\tTIMESTAMP\020\002*\270\004\n\016ColumnDataType"
-  "\022\n\n\006UINT16\020\006\022\n\n\006UINT32\020\007\022\n\n\006UINT64\020\010\022\013\n\007"
+  "\022\013\n\007BOOLEAN\020\000\022\010\n\004INT8\020\001\022\t\n\005INT16\020\002\022\t\n\005IN"
-  "FLOAT32\020\t\022\013\n\007FLOAT64\020\n\022\n\n\006BINARY\020\013\022\n\n\006ST"
+  "T32\020\003\022\t\n\005INT64\020\004\022\t\n\005UINT8\020\005\022\n\n\006UINT16\020\006\022"
-  "RING\020\014\022\010\n\004DATE\020\r\022\014\n\010DATETIME\020\016\022\024\n\020TIMEST"
+  "\n\n\006UINT32\020\007\022\n\n\006UINT64\020\010\022\013\n\007FLOAT32\020\t\022\013\n\007"
-  "AMP_SECOND\020\017\022\031\n\025TIMESTAMP_MILLISECOND\020\020\022"
+  "FLOAT64\020\n\022\n\n\006BINARY\020\013\022\n\n\006STRING\020\014\022\010\n\004DAT"
-  "\031\n\025TIMESTAMP_MICROSECOND\020\021\022\030\n\024TIMESTAMP_"
+  "E\020\r\022\014\n\010DATETIME\020\016\022\024\n\020TIMESTAMP_SECOND\020\017\022"
-  "NANOSECOND\020\022\022\017\n\013TIME_SECOND\020\023\022\024\n\020TIME_MI"
+  "\031\n\025TIMESTAMP_MILLISECOND\020\020\022\031\n\025TIMESTAMP_"
-  "LLISECOND\020\024\022\024\n\020TIME_MICROSECOND\020\025\022\023\n\017TIM"
+  "MICROSECOND\020\021\022\030\n\024TIMESTAMP_NANOSECOND\020\022\022"
-  "E_NANOSECOND\020\026\022\027\n\023INTERVAL_YEAR_MONTH\020\027\022"
+  "\017\n\013TIME_SECOND\020\023\022\024\n\020TIME_MILLISECOND\020\024\022\024"
-  "\025\n\021INTERVAL_DAY_TIME\020\030\022\033\n\027INTERVAL_MONTH"
+  "\n\020TIME_MICROSECOND\020\025\022\023\n\017TIME_NANOSECOND\020"
-  "_DAY_NANO\020\031\022\023\n\017DURATION_SECOND\020\032\022\030\n\024DURA"
+  "\026\022\027\n\023INTERVAL_YEAR_MONTH\020\027\022\025\n\021INTERVAL_D"
-  "TION_MILLISECOND\020\033\022\030\n\024DURATION_MICROSECO"
+  "AY_TIME\020\030\022\033\n\027INTERVAL_MONTH_DAY_NANO\020\031\022\023"
-  "ND\020\034\022\027\n\023DURATION_NANOSECOND\020\035\022\016\n\nDECIMAL"
+  "\n\017DURATION_SECOND\020\032\022\030\n\024DURATION_MILLISEC"
-  "128\020\036BO\n\016io.greptime.v1B\006CommonZ5github."
+  "OND\020\033\022\030\n\024DURATION_MICROSECOND\020\034\022\027\n\023DURAT"
-  "com/GreptimeTeam/greptime-proto/go/grept"
+  "ION_NANOSECOND\020\035\022\016\n\nDECIMAL128\020\036BO\n\016io.g"
-  "ime/v1b\006proto3"
+  "reptime.v1B\006CommonZ5github.com/GreptimeT"
+  "eam/greptime-proto/go/greptime/v1b\006proto"
+  "3"
   ;
 static ::_pbi::once_flag descriptor_table_greptime_2fv1_2fcommon_2eproto_once;
 const ::_pbi::DescriptorTable descriptor_table_greptime_2fv1_2fcommon_2eproto = {
-    false, false, 1654, descriptor_table_protodef_greptime_2fv1_2fcommon_2eproto,
+    false, false, 1721, descriptor_table_protodef_greptime_2fv1_2fcommon_2eproto,
     "greptime/v1/common.proto",
-    &descriptor_table_greptime_2fv1_2fcommon_2eproto_once, nullptr, 0, 13,
+    &descriptor_table_greptime_2fv1_2fcommon_2eproto_once, nullptr, 0, 14,
     schemas, file_default_instances, TableStruct_greptime_2fv1_2fcommon_2eproto::offsets,
     file_level_metadata_greptime_2fv1_2fcommon_2eproto, file_level_enum_descriptors_greptime_2fv1_2fcommon_2eproto,
     file_level_service_descriptors_greptime_2fv1_2fcommon_2eproto,
@@ -2311,15 +2337,218 @@ void AffectedRows::InternalSwap(AffectedRows* other) {
 
 // ===================================================================
 
+class Metrics::_Internal {
+ public:
+};
+
+Metrics::Metrics(::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.Metrics)
+}
+Metrics::Metrics(const Metrics& from)
+  : ::PROTOBUF_NAMESPACE_ID::Message() {
+  Metrics* const _this = this; (void)_this;
+  new (&_impl_) Impl_{
+      decltype(_impl_.metrics_){}
+    , /*decltype(_impl_._cached_size_)*/{}};
+
+  _internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
+  _impl_.metrics_.InitDefault();
+  #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+    _impl_.metrics_.Set("", GetArenaForAllocation());
+  #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  if (!from._internal_metrics().empty()) {
+    _this->_impl_.metrics_.Set(from._internal_metrics(), 
+      _this->GetArenaForAllocation());
+  }
+  // @@protoc_insertion_point(copy_constructor:greptime.v1.Metrics)
+}
+
+inline void Metrics::SharedCtor(
+    ::_pb::Arena* arena, bool is_message_owned) {
+  (void)arena;
+  (void)is_message_owned;
+  new (&_impl_) Impl_{
+      decltype(_impl_.metrics_){}
+    , /*decltype(_impl_._cached_size_)*/{}
+  };
+  _impl_.metrics_.InitDefault();
+  #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+    _impl_.metrics_.Set("", GetArenaForAllocation());
+  #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+}
+
+Metrics::~Metrics() {
+  // @@protoc_insertion_point(destructor:greptime.v1.Metrics)
+  if (auto *arena = _internal_metadata_.DeleteReturnArena<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>()) {
+  (void)arena;
+    return;
+  }
+  SharedDtor();
+}
+
+inline void Metrics::SharedDtor() {
+  GOOGLE_DCHECK(GetArenaForAllocation() == nullptr);
+  _impl_.metrics_.Destroy();
+}
+
+void Metrics::SetCachedSize(int size) const {
+  _impl_._cached_size_.Set(size);
+}
+
+void Metrics::Clear() {
+// @@protoc_insertion_point(message_clear_start:greptime.v1.Metrics)
+  uint32_t cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  _impl_.metrics_.ClearToEmpty();
+  _internal_metadata_.Clear<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>();
+}
+
+const char* Metrics::_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) {
+      // bytes metrics = 1;
+      case 1:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 10)) {
+          auto str = _internal_mutable_metrics();
+          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* Metrics::_InternalSerialize(
+    uint8_t* target, ::PROTOBUF_NAMESPACE_ID::io::EpsCopyOutputStream* stream) const {
+  // @@protoc_insertion_point(serialize_to_array_start:greptime.v1.Metrics)
+  uint32_t cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  // bytes metrics = 1;
+  if (!this->_internal_metrics().empty()) {
+    target = stream->WriteBytesMaybeAliased(
+        1, this->_internal_metrics(), 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.Metrics)
+  return target;
+}
+
+size_t Metrics::ByteSizeLong() const {
+// @@protoc_insertion_point(message_byte_size_start:greptime.v1.Metrics)
+  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 metrics = 1;
+  if (!this->_internal_metrics().empty()) {
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::BytesSize(
+        this->_internal_metrics());
+  }
+
+  return MaybeComputeUnknownFieldsSize(total_size, &_impl_._cached_size_);
+}
+
+const ::PROTOBUF_NAMESPACE_ID::Message::ClassData Metrics::_class_data_ = {
+    ::PROTOBUF_NAMESPACE_ID::Message::CopyWithSourceCheck,
+    Metrics::MergeImpl
+};
+const ::PROTOBUF_NAMESPACE_ID::Message::ClassData*Metrics::GetClassData() const { return &_class_data_; }
+
+
+void Metrics::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::PROTOBUF_NAMESPACE_ID::Message& from_msg) {
+  auto* const _this = static_cast<Metrics*>(&to_msg);
+  auto& from = static_cast<const Metrics&>(from_msg);
+  // @@protoc_insertion_point(class_specific_merge_from_start:greptime.v1.Metrics)
+  GOOGLE_DCHECK_NE(&from, _this);
+  uint32_t cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  if (!from._internal_metrics().empty()) {
+    _this->_internal_set_metrics(from._internal_metrics());
+  }
+  _this->_internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
+}
+
+void Metrics::CopyFrom(const Metrics& from) {
+// @@protoc_insertion_point(class_specific_copy_from_start:greptime.v1.Metrics)
+  if (&from == this) return;
+  Clear();
+  MergeFrom(from);
+}
+
+bool Metrics::IsInitialized() const {
+  return true;
+}
+
+void Metrics::InternalSwap(Metrics* 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_.metrics_, lhs_arena,
+      &other->_impl_.metrics_, rhs_arena
+  );
+}
+
+::PROTOBUF_NAMESPACE_ID::Metadata Metrics::GetMetadata() const {
+  return ::_pbi::AssignDescriptors(
+      &descriptor_table_greptime_2fv1_2fcommon_2eproto_getter, &descriptor_table_greptime_2fv1_2fcommon_2eproto_once,
+      file_level_metadata_greptime_2fv1_2fcommon_2eproto[8]);
+}
+
+// ===================================================================
+
 class FlightMetadata::_Internal {
  public:
   static const ::greptime::v1::AffectedRows& affected_rows(const FlightMetadata* msg);
+  static const ::greptime::v1::Metrics& metrics(const FlightMetadata* msg);
 };
 
 const ::greptime::v1::AffectedRows&
 FlightMetadata::_Internal::affected_rows(const FlightMetadata* msg) {
   return *msg->_impl_.affected_rows_;
 }
+const ::greptime::v1::Metrics&
+FlightMetadata::_Internal::metrics(const FlightMetadata* msg) {
+  return *msg->_impl_.metrics_;
+}
 FlightMetadata::FlightMetadata(::PROTOBUF_NAMESPACE_ID::Arena* arena,
                          bool is_message_owned)
   : ::PROTOBUF_NAMESPACE_ID::Message(arena, is_message_owned) {
@@ -2331,12 +2560,16 @@ FlightMetadata::FlightMetadata(const FlightMetadata& from)
   FlightMetadata* const _this = this; (void)_this;
   new (&_impl_) Impl_{
       decltype(_impl_.affected_rows_){nullptr}
+    , decltype(_impl_.metrics_){nullptr}
     , /*decltype(_impl_._cached_size_)*/{}};
 
   _internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
   if (from._internal_has_affected_rows()) {
     _this->_impl_.affected_rows_ = new ::greptime::v1::AffectedRows(*from._impl_.affected_rows_);
   }
+  if (from._internal_has_metrics()) {
+    _this->_impl_.metrics_ = new ::greptime::v1::Metrics(*from._impl_.metrics_);
+  }
   // @@protoc_insertion_point(copy_constructor:greptime.v1.FlightMetadata)
 }
 
@@ -2346,6 +2579,7 @@ inline void FlightMetadata::SharedCtor(
   (void)is_message_owned;
   new (&_impl_) Impl_{
       decltype(_impl_.affected_rows_){nullptr}
+    , decltype(_impl_.metrics_){nullptr}
     , /*decltype(_impl_._cached_size_)*/{}
   };
 }
@@ -2362,6 +2596,7 @@ FlightMetadata::~FlightMetadata() {
 inline void FlightMetadata::SharedDtor() {
   GOOGLE_DCHECK(GetArenaForAllocation() == nullptr);
   if (this != internal_default_instance()) delete _impl_.affected_rows_;
+  if (this != internal_default_instance()) delete _impl_.metrics_;
 }
 
 void FlightMetadata::SetCachedSize(int size) const {
@@ -2378,6 +2613,10 @@ void FlightMetadata::Clear() {
     delete _impl_.affected_rows_;
   }
   _impl_.affected_rows_ = nullptr;
+  if (GetArenaForAllocation() == nullptr && _impl_.metrics_ != nullptr) {
+    delete _impl_.metrics_;
+  }
+  _impl_.metrics_ = nullptr;
   _internal_metadata_.Clear<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>();
 }
 
@@ -2395,6 +2634,14 @@ const char* FlightMetadata::_InternalParse(const char* ptr, ::_pbi::ParseContext
         } else
           goto handle_unusual;
         continue;
+      // .greptime.v1.Metrics metrics = 2;
+      case 2:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 18)) {
+          ptr = ctx->ParseMessage(_internal_mutable_metrics(), ptr);
+          CHK_(ptr);
+        } else
+          goto handle_unusual;
+        continue;
       default:
         goto handle_unusual;
     }  // switch
@@ -2431,6 +2678,13 @@ uint8_t* FlightMetadata::_InternalSerialize(
         _Internal::affected_rows(this).GetCachedSize(), target, stream);
   }
 
+  // .greptime.v1.Metrics metrics = 2;
+  if (this->_internal_has_metrics()) {
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::
+      InternalWriteMessage(2, _Internal::metrics(this),
+        _Internal::metrics(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);
@@ -2454,6 +2708,13 @@ size_t FlightMetadata::ByteSizeLong() const {
         *_impl_.affected_rows_);
   }
 
+  // .greptime.v1.Metrics metrics = 2;
+  if (this->_internal_has_metrics()) {
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::MessageSize(
+        *_impl_.metrics_);
+  }
+
   return MaybeComputeUnknownFieldsSize(total_size, &_impl_._cached_size_);
 }
 
@@ -2476,6 +2737,10 @@ void FlightMetadata::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const :
     _this->_internal_mutable_affected_rows()->::greptime::v1::AffectedRows::MergeFrom(
         from._internal_affected_rows());
   }
+  if (from._internal_has_metrics()) {
+    _this->_internal_mutable_metrics()->::greptime::v1::Metrics::MergeFrom(
+        from._internal_metrics());
+  }
   _this->_internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
 }
 
@@ -2493,13 +2758,18 @@ bool FlightMetadata::IsInitialized() const {
 void FlightMetadata::InternalSwap(FlightMetadata* other) {
   using std::swap;
   _internal_metadata_.InternalSwap(&other->_internal_metadata_);
-  swap(_impl_.affected_rows_, other->_impl_.affected_rows_);
+  ::PROTOBUF_NAMESPACE_ID::internal::memswap<
+      PROTOBUF_FIELD_OFFSET(FlightMetadata, _impl_.metrics_)
+      + sizeof(FlightMetadata::_impl_.metrics_)
+      - PROTOBUF_FIELD_OFFSET(FlightMetadata, _impl_.affected_rows_)>(
+          reinterpret_cast<char*>(&_impl_.affected_rows_),
+          reinterpret_cast<char*>(&other->_impl_.affected_rows_));
 }
 
 ::PROTOBUF_NAMESPACE_ID::Metadata FlightMetadata::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fcommon_2eproto_getter, &descriptor_table_greptime_2fv1_2fcommon_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fcommon_2eproto[8]);
+      file_level_metadata_greptime_2fv1_2fcommon_2eproto[9]);
 }
 
 // ===================================================================
@@ -2734,7 +3004,7 @@ void IntervalMonthDayNano::InternalSwap(IntervalMonthDayNano* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata IntervalMonthDayNano::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fcommon_2eproto_getter, &descriptor_table_greptime_2fv1_2fcommon_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fcommon_2eproto[9]);
+      file_level_metadata_greptime_2fv1_2fcommon_2eproto[10]);
 }
 
 // ===================================================================
@@ -2945,7 +3215,7 @@ void Decimal128::InternalSwap(Decimal128* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata Decimal128::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fcommon_2eproto_getter, &descriptor_table_greptime_2fv1_2fcommon_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fcommon_2eproto[10]);
+      file_level_metadata_greptime_2fv1_2fcommon_2eproto[11]);
 }
 
 // ===================================================================
@@ -3192,7 +3462,7 @@ void ColumnDataTypeExtension::InternalSwap(ColumnDataTypeExtension* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata ColumnDataTypeExtension::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fcommon_2eproto_getter, &descriptor_table_greptime_2fv1_2fcommon_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fcommon_2eproto[11]);
+      file_level_metadata_greptime_2fv1_2fcommon_2eproto[12]);
 }
 
 // ===================================================================
@@ -3403,7 +3673,7 @@ void DecimalTypeExtension::InternalSwap(DecimalTypeExtension* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata DecimalTypeExtension::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fcommon_2eproto_getter, &descriptor_table_greptime_2fv1_2fcommon_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fcommon_2eproto[12]);
+      file_level_metadata_greptime_2fv1_2fcommon_2eproto[13]);
 }
 
 // @@protoc_insertion_point(namespace_scope)
@@ -3442,6 +3712,10 @@ template<> PROTOBUF_NOINLINE ::greptime::v1::AffectedRows*
 Arena::CreateMaybeMessage< ::greptime::v1::AffectedRows >(Arena* arena) {
   return Arena::CreateMessageInternal< ::greptime::v1::AffectedRows >(arena);
 }
+template<> PROTOBUF_NOINLINE ::greptime::v1::Metrics*
+Arena::CreateMaybeMessage< ::greptime::v1::Metrics >(Arena* arena) {
+  return Arena::CreateMessageInternal< ::greptime::v1::Metrics >(arena);
+}
 template<> PROTOBUF_NOINLINE ::greptime::v1::FlightMetadata*
 Arena::CreateMaybeMessage< ::greptime::v1::FlightMetadata >(Arena* arena) {
   return Arena::CreateMessageInternal< ::greptime::v1::FlightMetadata >(arena);

c++/greptime/v1/common.pb.h

@@ -74,6 +74,9 @@ extern FlightMetadataDefaultTypeInternal _FlightMetadata_default_instance_;
 class IntervalMonthDayNano;
 struct IntervalMonthDayNanoDefaultTypeInternal;
 extern IntervalMonthDayNanoDefaultTypeInternal _IntervalMonthDayNano_default_instance_;
+class Metrics;
+struct MetricsDefaultTypeInternal;
+extern MetricsDefaultTypeInternal _Metrics_default_instance_;
 class RequestHeader;
 struct RequestHeaderDefaultTypeInternal;
 extern RequestHeaderDefaultTypeInternal _RequestHeader_default_instance_;
@@ -100,6 +103,7 @@ template<> ::greptime::v1::Decimal128* Arena::CreateMaybeMessage<::greptime::v1:
 template<> ::greptime::v1::DecimalTypeExtension* Arena::CreateMaybeMessage<::greptime::v1::DecimalTypeExtension>(Arena*);
 template<> ::greptime::v1::FlightMetadata* Arena::CreateMaybeMessage<::greptime::v1::FlightMetadata>(Arena*);
 template<> ::greptime::v1::IntervalMonthDayNano* Arena::CreateMaybeMessage<::greptime::v1::IntervalMonthDayNano>(Arena*);
+template<> ::greptime::v1::Metrics* Arena::CreateMaybeMessage<::greptime::v1::Metrics>(Arena*);
 template<> ::greptime::v1::RequestHeader* Arena::CreateMaybeMessage<::greptime::v1::RequestHeader>(Arena*);
 template<> ::greptime::v1::RequestHeader_TracingContextEntry_DoNotUse* Arena::CreateMaybeMessage<::greptime::v1::RequestHeader_TracingContextEntry_DoNotUse>(Arena*);
 template<> ::greptime::v1::ResponseHeader* Arena::CreateMaybeMessage<::greptime::v1::ResponseHeader>(Arena*);
@@ -1453,6 +1457,159 @@ class AffectedRows final :
 };
 // -------------------------------------------------------------------
 
+class Metrics final :
+    public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:greptime.v1.Metrics) */ {
+ public:
+  inline Metrics() : Metrics(nullptr) {}
+  ~Metrics() override;
+  explicit PROTOBUF_CONSTEXPR Metrics(::PROTOBUF_NAMESPACE_ID::internal::ConstantInitialized);
+
+  Metrics(const Metrics& from);
+  Metrics(Metrics&& from) noexcept
+    : Metrics() {
+    *this = ::std::move(from);
+  }
+
+  inline Metrics& operator=(const Metrics& from) {
+    CopyFrom(from);
+    return *this;
+  }
+  inline Metrics& operator=(Metrics&& 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 Metrics& default_instance() {
+    return *internal_default_instance();
+  }
+  static inline const Metrics* internal_default_instance() {
+    return reinterpret_cast<const Metrics*>(
+               &_Metrics_default_instance_);
+  }
+  static constexpr int kIndexInFileMessages =
+    8;
+
+  friend void swap(Metrics& a, Metrics& b) {
+    a.Swap(&b);
+  }
+  inline void Swap(Metrics* 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(Metrics* other) {
+    if (other == this) return;
+    GOOGLE_DCHECK(GetOwningArena() == other->GetOwningArena());
+    InternalSwap(other);
+  }
+
+  // implements Message ----------------------------------------------
+
+  Metrics* New(::PROTOBUF_NAMESPACE_ID::Arena* arena = nullptr) const final {
+    return CreateMaybeMessage<Metrics>(arena);
+  }
+  using ::PROTOBUF_NAMESPACE_ID::Message::CopyFrom;
+  void CopyFrom(const Metrics& from);
+  using ::PROTOBUF_NAMESPACE_ID::Message::MergeFrom;
+  void MergeFrom( const Metrics& from) {
+    Metrics::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(Metrics* other);
+
+  private:
+  friend class ::PROTOBUF_NAMESPACE_ID::internal::AnyMetadata;
+  static ::PROTOBUF_NAMESPACE_ID::StringPiece FullMessageName() {
+    return "greptime.v1.Metrics";
+  }
+  protected:
+  explicit Metrics(::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 {
+    kMetricsFieldNumber = 1,
+  };
+  // bytes metrics = 1;
+  void clear_metrics();
+  const std::string& metrics() const;
+  template <typename ArgT0 = const std::string&, typename... ArgT>
+  void set_metrics(ArgT0&& arg0, ArgT... args);
+  std::string* mutable_metrics();
+  PROTOBUF_NODISCARD std::string* release_metrics();
+  void set_allocated_metrics(std::string* metrics);
+  private:
+  const std::string& _internal_metrics() const;
+  inline PROTOBUF_ALWAYS_INLINE void _internal_set_metrics(const std::string& value);
+  std::string* _internal_mutable_metrics();
+  public:
+
+  // @@protoc_insertion_point(class_scope:greptime.v1.Metrics)
+ 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 metrics_;
+    mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
+  };
+  union { Impl_ _impl_; };
+  friend struct ::TableStruct_greptime_2fv1_2fcommon_2eproto;
+};
+// -------------------------------------------------------------------
+
 class FlightMetadata final :
     public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:greptime.v1.FlightMetadata) */ {
  public:
@@ -1501,7 +1658,7 @@ class FlightMetadata final :
                &_FlightMetadata_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    8;
+    9;
 
   friend void swap(FlightMetadata& a, FlightMetadata& b) {
     a.Swap(&b);
@@ -1575,6 +1732,7 @@ class FlightMetadata final :
 
   enum : int {
     kAffectedRowsFieldNumber = 1,
+    kMetricsFieldNumber = 2,
   };
   // .greptime.v1.AffectedRows affected_rows = 1;
   bool has_affected_rows() const;
@@ -1594,6 +1752,24 @@ class FlightMetadata final :
       ::greptime::v1::AffectedRows* affected_rows);
   ::greptime::v1::AffectedRows* unsafe_arena_release_affected_rows();
 
+  // .greptime.v1.Metrics metrics = 2;
+  bool has_metrics() const;
+  private:
+  bool _internal_has_metrics() const;
+  public:
+  void clear_metrics();
+  const ::greptime::v1::Metrics& metrics() const;
+  PROTOBUF_NODISCARD ::greptime::v1::Metrics* release_metrics();
+  ::greptime::v1::Metrics* mutable_metrics();
+  void set_allocated_metrics(::greptime::v1::Metrics* metrics);
+  private:
+  const ::greptime::v1::Metrics& _internal_metrics() const;
+  ::greptime::v1::Metrics* _internal_mutable_metrics();
+  public:
+  void unsafe_arena_set_allocated_metrics(
+      ::greptime::v1::Metrics* metrics);
+  ::greptime::v1::Metrics* unsafe_arena_release_metrics();
+
   // @@protoc_insertion_point(class_scope:greptime.v1.FlightMetadata)
  private:
   class _Internal;
@@ -1603,6 +1779,7 @@ class FlightMetadata final :
   typedef void DestructorSkippable_;
   struct Impl_ {
     ::greptime::v1::AffectedRows* affected_rows_;
+    ::greptime::v1::Metrics* metrics_;
     mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
   };
   union { Impl_ _impl_; };
@@ -1658,7 +1835,7 @@ class IntervalMonthDayNano final :
                &_IntervalMonthDayNano_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    9;
+    10;
 
   friend void swap(IntervalMonthDayNano& a, IntervalMonthDayNano& b) {
     a.Swap(&b);
@@ -1828,7 +2005,7 @@ class Decimal128 final :
                &_Decimal128_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    10;
+    11;
 
   friend void swap(Decimal128& a, Decimal128& b) {
     a.Swap(&b);
@@ -1992,7 +2169,7 @@ class ColumnDataTypeExtension final :
                &_ColumnDataTypeExtension_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    11;
+    12;
 
   friend void swap(ColumnDataTypeExtension& a, ColumnDataTypeExtension& b) {
     a.Swap(&b);
@@ -2161,7 +2338,7 @@ class DecimalTypeExtension final :
                &_DecimalTypeExtension_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    12;
+    13;
 
   friend void swap(DecimalTypeExtension& a, DecimalTypeExtension& b) {
     a.Swap(&b);
@@ -3115,6 +3292,60 @@ inline void AffectedRows::set_value(uint32_t value) {
 
 // -------------------------------------------------------------------
 
+// Metrics
+
+// bytes metrics = 1;
+inline void Metrics::clear_metrics() {
+  _impl_.metrics_.ClearToEmpty();
+}
+inline const std::string& Metrics::metrics() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.Metrics.metrics)
+  return _internal_metrics();
+}
+template <typename ArgT0, typename... ArgT>
+inline PROTOBUF_ALWAYS_INLINE
+void Metrics::set_metrics(ArgT0&& arg0, ArgT... args) {
+ 
+ _impl_.metrics_.SetBytes(static_cast<ArgT0 &&>(arg0), args..., GetArenaForAllocation());
+  // @@protoc_insertion_point(field_set:greptime.v1.Metrics.metrics)
+}
+inline std::string* Metrics::mutable_metrics() {
+  std::string* _s = _internal_mutable_metrics();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.Metrics.metrics)
+  return _s;
+}
+inline const std::string& Metrics::_internal_metrics() const {
+  return _impl_.metrics_.Get();
+}
+inline void Metrics::_internal_set_metrics(const std::string& value) {
+  
+  _impl_.metrics_.Set(value, GetArenaForAllocation());
+}
+inline std::string* Metrics::_internal_mutable_metrics() {
+  
+  return _impl_.metrics_.Mutable(GetArenaForAllocation());
+}
+inline std::string* Metrics::release_metrics() {
+  // @@protoc_insertion_point(field_release:greptime.v1.Metrics.metrics)
+  return _impl_.metrics_.Release();
+}
+inline void Metrics::set_allocated_metrics(std::string* metrics) {
+  if (metrics != nullptr) {
+    
+  } else {
+    
+  }
+  _impl_.metrics_.SetAllocated(metrics, GetArenaForAllocation());
+#ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  if (_impl_.metrics_.IsDefault()) {
+    _impl_.metrics_.Set("", GetArenaForAllocation());
+  }
+#endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.Metrics.metrics)
+}
+
+// -------------------------------------------------------------------
+
 // FlightMetadata
 
 // .greptime.v1.AffectedRows affected_rows = 1;
@@ -3207,6 +3438,96 @@ inline void FlightMetadata::set_allocated_affected_rows(::greptime::v1::Affected
   // @@protoc_insertion_point(field_set_allocated:greptime.v1.FlightMetadata.affected_rows)
 }
 
+// .greptime.v1.Metrics metrics = 2;
+inline bool FlightMetadata::_internal_has_metrics() const {
+  return this != internal_default_instance() && _impl_.metrics_ != nullptr;
+}
+inline bool FlightMetadata::has_metrics() const {
+  return _internal_has_metrics();
+}
+inline void FlightMetadata::clear_metrics() {
+  if (GetArenaForAllocation() == nullptr && _impl_.metrics_ != nullptr) {
+    delete _impl_.metrics_;
+  }
+  _impl_.metrics_ = nullptr;
+}
+inline const ::greptime::v1::Metrics& FlightMetadata::_internal_metrics() const {
+  const ::greptime::v1::Metrics* p = _impl_.metrics_;
+  return p != nullptr ? *p : reinterpret_cast<const ::greptime::v1::Metrics&>(
+      ::greptime::v1::_Metrics_default_instance_);
+}
+inline const ::greptime::v1::Metrics& FlightMetadata::metrics() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.FlightMetadata.metrics)
+  return _internal_metrics();
+}
+inline void FlightMetadata::unsafe_arena_set_allocated_metrics(
+    ::greptime::v1::Metrics* metrics) {
+  if (GetArenaForAllocation() == nullptr) {
+    delete reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(_impl_.metrics_);
+  }
+  _impl_.metrics_ = metrics;
+  if (metrics) {
+    
+  } else {
+    
+  }
+  // @@protoc_insertion_point(field_unsafe_arena_set_allocated:greptime.v1.FlightMetadata.metrics)
+}
+inline ::greptime::v1::Metrics* FlightMetadata::release_metrics() {
+  
+  ::greptime::v1::Metrics* temp = _impl_.metrics_;
+  _impl_.metrics_ = 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::Metrics* FlightMetadata::unsafe_arena_release_metrics() {
+  // @@protoc_insertion_point(field_release:greptime.v1.FlightMetadata.metrics)
+  
+  ::greptime::v1::Metrics* temp = _impl_.metrics_;
+  _impl_.metrics_ = nullptr;
+  return temp;
+}
+inline ::greptime::v1::Metrics* FlightMetadata::_internal_mutable_metrics() {
+  
+  if (_impl_.metrics_ == nullptr) {
+    auto* p = CreateMaybeMessage<::greptime::v1::Metrics>(GetArenaForAllocation());
+    _impl_.metrics_ = p;
+  }
+  return _impl_.metrics_;
+}
+inline ::greptime::v1::Metrics* FlightMetadata::mutable_metrics() {
+  ::greptime::v1::Metrics* _msg = _internal_mutable_metrics();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.FlightMetadata.metrics)
+  return _msg;
+}
+inline void FlightMetadata::set_allocated_metrics(::greptime::v1::Metrics* metrics) {
+  ::PROTOBUF_NAMESPACE_ID::Arena* message_arena = GetArenaForAllocation();
+  if (message_arena == nullptr) {
+    delete _impl_.metrics_;
+  }
+  if (metrics) {
+    ::PROTOBUF_NAMESPACE_ID::Arena* submessage_arena =
+        ::PROTOBUF_NAMESPACE_ID::Arena::InternalGetOwningArena(metrics);
+    if (message_arena != submessage_arena) {
+      metrics = ::PROTOBUF_NAMESPACE_ID::internal::GetOwnedMessage(
+          message_arena, metrics, submessage_arena);
+    }
+    
+  } else {
+    
+  }
+  _impl_.metrics_ = metrics;
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.FlightMetadata.metrics)
+}
+
 // -------------------------------------------------------------------
 
 // IntervalMonthDayNano
@@ -3473,6 +3794,8 @@ inline void DecimalTypeExtension::set_scale(int32_t value) {
 
 // -------------------------------------------------------------------
 
+// -------------------------------------------------------------------
+
 
 // @@protoc_insertion_point(namespace_scope)
 

go/greptime/v1/common.pb.go

@@ -643,18 +643,66 @@ func (x *AffectedRows) GetValue() uint32 {
 	return 0
 }
 
+type Metrics struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Metrics []byte `protobuf:"bytes,1,opt,name=metrics,proto3" json:"metrics,omitempty"`
+}
+
+func (x *Metrics) Reset() {
+	*x = Metrics{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_greptime_v1_common_proto_msgTypes[7]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Metrics) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Metrics) ProtoMessage() {}
+
+func (x *Metrics) ProtoReflect() protoreflect.Message {
+	mi := &file_greptime_v1_common_proto_msgTypes[7]
+	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 Metrics.ProtoReflect.Descriptor instead.
+func (*Metrics) Descriptor() ([]byte, []int) {
+	return file_greptime_v1_common_proto_rawDescGZIP(), []int{7}
+}
+
+func (x *Metrics) GetMetrics() []byte {
+	if x != nil {
+		return x.Metrics
+	}
+	return nil
+}
+
 type FlightMetadata struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
 	AffectedRows *AffectedRows `protobuf:"bytes,1,opt,name=affected_rows,json=affectedRows,proto3" json:"affected_rows,omitempty"`
+	Metrics      *Metrics      `protobuf:"bytes,2,opt,name=metrics,proto3" json:"metrics,omitempty"`
 }
 
 func (x *FlightMetadata) Reset() {
 	*x = FlightMetadata{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_common_proto_msgTypes[7]
+		mi := &file_greptime_v1_common_proto_msgTypes[8]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -667,7 +715,7 @@ func (x *FlightMetadata) String() string {
 func (*FlightMetadata) ProtoMessage() {}
 
 func (x *FlightMetadata) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_common_proto_msgTypes[7]
+	mi := &file_greptime_v1_common_proto_msgTypes[8]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -680,7 +728,7 @@ func (x *FlightMetadata) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use FlightMetadata.ProtoReflect.Descriptor instead.
 func (*FlightMetadata) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_common_proto_rawDescGZIP(), []int{7}
+	return file_greptime_v1_common_proto_rawDescGZIP(), []int{8}
 }
 
 func (x *FlightMetadata) GetAffectedRows() *AffectedRows {
@@ -690,6 +738,13 @@ func (x *FlightMetadata) GetAffectedRows() *AffectedRows {
 	return nil
 }
 
+func (x *FlightMetadata) GetMetrics() *Metrics {
+	if x != nil {
+		return x.Metrics
+	}
+	return nil
+}
+
 type IntervalMonthDayNano struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -703,7 +758,7 @@ type IntervalMonthDayNano struct {
 func (x *IntervalMonthDayNano) Reset() {
 	*x = IntervalMonthDayNano{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_common_proto_msgTypes[8]
+		mi := &file_greptime_v1_common_proto_msgTypes[9]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -716,7 +771,7 @@ func (x *IntervalMonthDayNano) String() string {
 func (*IntervalMonthDayNano) ProtoMessage() {}
 
 func (x *IntervalMonthDayNano) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_common_proto_msgTypes[8]
+	mi := &file_greptime_v1_common_proto_msgTypes[9]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -729,7 +784,7 @@ func (x *IntervalMonthDayNano) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use IntervalMonthDayNano.ProtoReflect.Descriptor instead.
 func (*IntervalMonthDayNano) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_common_proto_rawDescGZIP(), []int{8}
+	return file_greptime_v1_common_proto_rawDescGZIP(), []int{9}
 }
 
 func (x *IntervalMonthDayNano) GetMonths() int32 {
@@ -766,7 +821,7 @@ type Decimal128 struct {
 func (x *Decimal128) Reset() {
 	*x = Decimal128{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_common_proto_msgTypes[9]
+		mi := &file_greptime_v1_common_proto_msgTypes[10]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -779,7 +834,7 @@ func (x *Decimal128) String() string {
 func (*Decimal128) ProtoMessage() {}
 
 func (x *Decimal128) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_common_proto_msgTypes[9]
+	mi := &file_greptime_v1_common_proto_msgTypes[10]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -792,7 +847,7 @@ func (x *Decimal128) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Decimal128.ProtoReflect.Descriptor instead.
 func (*Decimal128) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_common_proto_rawDescGZIP(), []int{9}
+	return file_greptime_v1_common_proto_rawDescGZIP(), []int{10}
 }
 
 func (x *Decimal128) GetHi() int64 {
@@ -824,7 +879,7 @@ type ColumnDataTypeExtension struct {
 func (x *ColumnDataTypeExtension) Reset() {
 	*x = ColumnDataTypeExtension{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_common_proto_msgTypes[10]
+		mi := &file_greptime_v1_common_proto_msgTypes[11]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -837,7 +892,7 @@ func (x *ColumnDataTypeExtension) String() string {
 func (*ColumnDataTypeExtension) ProtoMessage() {}
 
 func (x *ColumnDataTypeExtension) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_common_proto_msgTypes[10]
+	mi := &file_greptime_v1_common_proto_msgTypes[11]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -850,7 +905,7 @@ func (x *ColumnDataTypeExtension) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ColumnDataTypeExtension.ProtoReflect.Descriptor instead.
 func (*ColumnDataTypeExtension) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_common_proto_rawDescGZIP(), []int{10}
+	return file_greptime_v1_common_proto_rawDescGZIP(), []int{11}
 }
 
 func (m *ColumnDataTypeExtension) GetTypeExt() isColumnDataTypeExtension_TypeExt {
@@ -889,7 +944,7 @@ type DecimalTypeExtension struct {
 func (x *DecimalTypeExtension) Reset() {
 	*x = DecimalTypeExtension{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_common_proto_msgTypes[11]
+		mi := &file_greptime_v1_common_proto_msgTypes[12]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -902,7 +957,7 @@ func (x *DecimalTypeExtension) String() string {
 func (*DecimalTypeExtension) ProtoMessage() {}
 
 func (x *DecimalTypeExtension) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_common_proto_msgTypes[11]
+	mi := &file_greptime_v1_common_proto_msgTypes[12]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -915,7 +970,7 @@ func (x *DecimalTypeExtension) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DecimalTypeExtension.ProtoReflect.Descriptor instead.
 func (*DecimalTypeExtension) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_common_proto_rawDescGZIP(), []int{11}
+	return file_greptime_v1_common_proto_rawDescGZIP(), []int{12}
 }
 
 func (x *DecimalTypeExtension) GetPrecision() int32 {
@@ -982,77 +1037,83 @@ var file_greptime_v1_common_proto_rawDesc = []byte{
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+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -1068,7 +1129,7 @@ func file_greptime_v1_common_proto_rawDescGZIP() []byte {
 }
 
 var file_greptime_v1_common_proto_enumTypes = make([]protoimpl.EnumInfo, 2)
-var file_greptime_v1_common_proto_msgTypes = make([]protoimpl.MessageInfo, 13)
+var file_greptime_v1_common_proto_msgTypes = make([]protoimpl.MessageInfo, 14)
 var file_greptime_v1_common_proto_goTypes = []interface{}{
 	(SemanticType)(0),               // 0: greptime.v1.SemanticType
 	(ColumnDataType)(0),             // 1: greptime.v1.ColumnDataType
@@ -1079,26 +1140,28 @@ var file_greptime_v1_common_proto_goTypes = []interface{}{
 	(*Basic)(nil),                   // 6: greptime.v1.Basic
 	(*Token)(nil),                   // 7: greptime.v1.Token
 	(*AffectedRows)(nil),            // 8: greptime.v1.AffectedRows
-	(*FlightMetadata)(nil),          // 9: greptime.v1.FlightMetadata
+	(*Metrics)(nil),                 // 9: greptime.v1.Metrics
-	(*IntervalMonthDayNano)(nil),    // 10: greptime.v1.IntervalMonthDayNano
+	(*FlightMetadata)(nil),          // 10: greptime.v1.FlightMetadata
-	(*Decimal128)(nil),              // 11: greptime.v1.Decimal128
+	(*IntervalMonthDayNano)(nil),    // 11: greptime.v1.IntervalMonthDayNano
-	(*ColumnDataTypeExtension)(nil), // 12: greptime.v1.ColumnDataTypeExtension
+	(*Decimal128)(nil),              // 12: greptime.v1.Decimal128
-	(*DecimalTypeExtension)(nil),    // 13: greptime.v1.DecimalTypeExtension
+	(*ColumnDataTypeExtension)(nil), // 13: greptime.v1.ColumnDataTypeExtension
-	nil,                             // 14: greptime.v1.RequestHeader.TracingContextEntry
+	(*DecimalTypeExtension)(nil),    // 14: greptime.v1.DecimalTypeExtension
+	nil,                             // 15: greptime.v1.RequestHeader.TracingContextEntry
 }
 var file_greptime_v1_common_proto_depIdxs = []int32{
 	5,  // 0: greptime.v1.RequestHeader.authorization:type_name -> greptime.v1.AuthHeader
-	14, // 1: greptime.v1.RequestHeader.tracing_context:type_name -> greptime.v1.RequestHeader.TracingContextEntry
+	15, // 1: greptime.v1.RequestHeader.tracing_context:type_name -> greptime.v1.RequestHeader.TracingContextEntry
 	4,  // 2: greptime.v1.ResponseHeader.status:type_name -> greptime.v1.Status
 	6,  // 3: greptime.v1.AuthHeader.basic:type_name -> greptime.v1.Basic
 	7,  // 4: greptime.v1.AuthHeader.token:type_name -> greptime.v1.Token
 	8,  // 5: greptime.v1.FlightMetadata.affected_rows:type_name -> greptime.v1.AffectedRows
-	13, // 6: greptime.v1.ColumnDataTypeExtension.decimal_type:type_name -> greptime.v1.DecimalTypeExtension
+	9,  // 6: greptime.v1.FlightMetadata.metrics:type_name -> greptime.v1.Metrics
-	7,  // [7:7] is the sub-list for method output_type
+	14, // 7: greptime.v1.ColumnDataTypeExtension.decimal_type:type_name -> greptime.v1.DecimalTypeExtension
-	7,  // [7:7] is the sub-list for method input_type
+	8,  // [8:8] is the sub-list for method output_type
-	7,  // [7:7] is the sub-list for extension type_name
+	8,  // [8:8] is the sub-list for method input_type
-	7,  // [7:7] is the sub-list for extension extendee
+	8,  // [8:8] is the sub-list for extension type_name
-	0,  // [0:7] is the sub-list for field type_name
+	8,  // [8:8] is the sub-list for extension extendee
+	0,  // [0:8] is the sub-list for field type_name
 }
 
 func init() { file_greptime_v1_common_proto_init() }
@@ -1192,7 +1255,7 @@ func file_greptime_v1_common_proto_init() {
 			}
 		}
 		file_greptime_v1_common_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*FlightMetadata); i {
+			switch v := v.(*Metrics); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1204,7 +1267,7 @@ func file_greptime_v1_common_proto_init() {
 			}
 		}
 		file_greptime_v1_common_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*IntervalMonthDayNano); i {
+			switch v := v.(*FlightMetadata); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1216,7 +1279,7 @@ func file_greptime_v1_common_proto_init() {
 			}
 		}
 		file_greptime_v1_common_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*Decimal128); i {
+			switch v := v.(*IntervalMonthDayNano); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1228,7 +1291,7 @@ func file_greptime_v1_common_proto_init() {
 			}
 		}
 		file_greptime_v1_common_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ColumnDataTypeExtension); i {
+			switch v := v.(*Decimal128); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1240,6 +1303,18 @@ func file_greptime_v1_common_proto_init() {
 			}
 		}
 		file_greptime_v1_common_proto_msgTypes[11].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ColumnDataTypeExtension); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_greptime_v1_common_proto_msgTypes[12].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*DecimalTypeExtension); i {
 			case 0:
 				return &v.state
@@ -1256,7 +1331,7 @@ func file_greptime_v1_common_proto_init() {
 		(*AuthHeader_Basic)(nil),
 		(*AuthHeader_Token)(nil),
 	}
-	file_greptime_v1_common_proto_msgTypes[10].OneofWrappers = []interface{}{
+	file_greptime_v1_common_proto_msgTypes[11].OneofWrappers = []interface{}{
 		(*ColumnDataTypeExtension_DecimalType)(nil),
 	}
 	type x struct{}
@@ -1265,7 +1340,7 @@ func file_greptime_v1_common_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_greptime_v1_common_proto_rawDesc,
 			NumEnums:      2,
-			NumMessages:   13,
+			NumMessages:   14,
 			NumExtensions: 0,
 			NumServices:   0,
 		},

java/src/main/java/io/greptime/v1/Common.java

@@ -6346,6 +6346,500 @@ java.lang.String defaultValue);
 
   }
 
+  public interface MetricsOrBuilder extends
+      // @@protoc_insertion_point(interface_extends:greptime.v1.Metrics)
+      com.google.protobuf.MessageOrBuilder {
+
+    /**
+     * <code>bytes metrics = 1;</code>
+     * @return The metrics.
+     */
+    com.google.protobuf.ByteString getMetrics();
+  }
+  /**
+   * Protobuf type {@code greptime.v1.Metrics}
+   */
+  public static final class Metrics extends
+      com.google.protobuf.GeneratedMessageV3 implements
+      // @@protoc_insertion_point(message_implements:greptime.v1.Metrics)
+      MetricsOrBuilder {
+  private static final long serialVersionUID = 0L;
+    // Use Metrics.newBuilder() to construct.
+    private Metrics(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+      super(builder);
+    }
+    private Metrics() {
+      metrics_ = com.google.protobuf.ByteString.EMPTY;
+    }
+
+    @java.lang.Override
+    @SuppressWarnings({"unused"})
+    protected java.lang.Object newInstance(
+        UnusedPrivateParameter unused) {
+      return new Metrics();
+    }
+
+    @java.lang.Override
+    public final com.google.protobuf.UnknownFieldSet
+    getUnknownFields() {
+      return this.unknownFields;
+    }
+    private Metrics(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      this();
+      if (extensionRegistry == null) {
+        throw new java.lang.NullPointerException();
+      }
+      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+          com.google.protobuf.UnknownFieldSet.newBuilder();
+      try {
+        boolean done = false;
+        while (!done) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              done = true;
+              break;
+            case 10: {
+
+              metrics_ = input.readBytes();
+              break;
+            }
+            default: {
+              if (!parseUnknownField(
+                  input, unknownFields, extensionRegistry, tag)) {
+                done = true;
+              }
+              break;
+            }
+          }
+        }
+      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+        throw e.setUnfinishedMessage(this);
+      } catch (com.google.protobuf.UninitializedMessageException e) {
+        throw e.asInvalidProtocolBufferException().setUnfinishedMessage(this);
+      } catch (java.io.IOException e) {
+        throw new com.google.protobuf.InvalidProtocolBufferException(
+            e).setUnfinishedMessage(this);
+      } finally {
+        this.unknownFields = unknownFields.build();
+        makeExtensionsImmutable();
+      }
+    }
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return io.greptime.v1.Common.internal_static_greptime_v1_Metrics_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return io.greptime.v1.Common.internal_static_greptime_v1_Metrics_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              io.greptime.v1.Common.Metrics.class, io.greptime.v1.Common.Metrics.Builder.class);
+    }
+
+    public static final int METRICS_FIELD_NUMBER = 1;
+    private com.google.protobuf.ByteString metrics_;
+    /**
+     * <code>bytes metrics = 1;</code>
+     * @return The metrics.
+     */
+    @java.lang.Override
+    public com.google.protobuf.ByteString getMetrics() {
+      return metrics_;
+    }
+
+    private byte memoizedIsInitialized = -1;
+    @java.lang.Override
+    public final boolean isInitialized() {
+      byte isInitialized = memoizedIsInitialized;
+      if (isInitialized == 1) return true;
+      if (isInitialized == 0) return false;
+
+      memoizedIsInitialized = 1;
+      return true;
+    }
+
+    @java.lang.Override
+    public void writeTo(com.google.protobuf.CodedOutputStream output)
+                        throws java.io.IOException {
+      if (!metrics_.isEmpty()) {
+        output.writeBytes(1, metrics_);
+      }
+      unknownFields.writeTo(output);
+    }
+
+    @java.lang.Override
+    public int getSerializedSize() {
+      int size = memoizedSize;
+      if (size != -1) return size;
+
+      size = 0;
+      if (!metrics_.isEmpty()) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBytesSize(1, metrics_);
+      }
+      size += unknownFields.getSerializedSize();
+      memoizedSize = size;
+      return size;
+    }
+
+    @java.lang.Override
+    public boolean equals(final java.lang.Object obj) {
+      if (obj == this) {
+       return true;
+      }
+      if (!(obj instanceof io.greptime.v1.Common.Metrics)) {
+        return super.equals(obj);
+      }
+      io.greptime.v1.Common.Metrics other = (io.greptime.v1.Common.Metrics) obj;
+
+      if (!getMetrics()
+          .equals(other.getMetrics())) return false;
+      if (!unknownFields.equals(other.unknownFields)) return false;
+      return true;
+    }
+
+    @java.lang.Override
+    public int hashCode() {
+      if (memoizedHashCode != 0) {
+        return memoizedHashCode;
+      }
+      int hash = 41;
+      hash = (19 * hash) + getDescriptor().hashCode();
+      hash = (37 * hash) + METRICS_FIELD_NUMBER;
+      hash = (53 * hash) + getMetrics().hashCode();
+      hash = (29 * hash) + unknownFields.hashCode();
+      memoizedHashCode = hash;
+      return hash;
+    }
+
+    public static io.greptime.v1.Common.Metrics parseFrom(
+        java.nio.ByteBuffer data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static io.greptime.v1.Common.Metrics parseFrom(
+        java.nio.ByteBuffer data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static io.greptime.v1.Common.Metrics parseFrom(
+        com.google.protobuf.ByteString data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static io.greptime.v1.Common.Metrics parseFrom(
+        com.google.protobuf.ByteString data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static io.greptime.v1.Common.Metrics parseFrom(byte[] data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static io.greptime.v1.Common.Metrics parseFrom(
+        byte[] data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static io.greptime.v1.Common.Metrics parseFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseWithIOException(PARSER, input);
+    }
+    public static io.greptime.v1.Common.Metrics parseFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseWithIOException(PARSER, input, extensionRegistry);
+    }
+    public static io.greptime.v1.Common.Metrics parseDelimitedFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseDelimitedWithIOException(PARSER, input);
+    }
+    public static io.greptime.v1.Common.Metrics parseDelimitedFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseDelimitedWithIOException(PARSER, input, extensionRegistry);
+    }
+    public static io.greptime.v1.Common.Metrics parseFrom(
+        com.google.protobuf.CodedInputStream input)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseWithIOException(PARSER, input);
+    }
+    public static io.greptime.v1.Common.Metrics parseFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseWithIOException(PARSER, input, extensionRegistry);
+    }
+
+    @java.lang.Override
+    public Builder newBuilderForType() { return newBuilder(); }
+    public static Builder newBuilder() {
+      return DEFAULT_INSTANCE.toBuilder();
+    }
+    public static Builder newBuilder(io.greptime.v1.Common.Metrics prototype) {
+      return DEFAULT_INSTANCE.toBuilder().mergeFrom(prototype);
+    }
+    @java.lang.Override
+    public Builder toBuilder() {
+      return this == DEFAULT_INSTANCE
+          ? new Builder() : new Builder().mergeFrom(this);
+    }
+
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
+    }
+    /**
+     * Protobuf type {@code greptime.v1.Metrics}
+     */
+    public static final class Builder extends
+        com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
+        // @@protoc_insertion_point(builder_implements:greptime.v1.Metrics)
+        io.greptime.v1.Common.MetricsOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return io.greptime.v1.Common.internal_static_greptime_v1_Metrics_descriptor;
+      }
+
+      @java.lang.Override
+      protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return io.greptime.v1.Common.internal_static_greptime_v1_Metrics_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                io.greptime.v1.Common.Metrics.class, io.greptime.v1.Common.Metrics.Builder.class);
+      }
+
+      // Construct using io.greptime.v1.Common.Metrics.newBuilder()
+      private Builder() {
+        maybeForceBuilderInitialization();
+      }
+
+      private Builder(
+          com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
+        super(parent);
+        maybeForceBuilderInitialization();
+      }
+      private void maybeForceBuilderInitialization() {
+        if (com.google.protobuf.GeneratedMessageV3
+                .alwaysUseFieldBuilders) {
+        }
+      }
+      @java.lang.Override
+      public Builder clear() {
+        super.clear();
+        metrics_ = com.google.protobuf.ByteString.EMPTY;
+
+        return this;
+      }
+
+      @java.lang.Override
+      public com.google.protobuf.Descriptors.Descriptor
+          getDescriptorForType() {
+        return io.greptime.v1.Common.internal_static_greptime_v1_Metrics_descriptor;
+      }
+
+      @java.lang.Override
+      public io.greptime.v1.Common.Metrics getDefaultInstanceForType() {
+        return io.greptime.v1.Common.Metrics.getDefaultInstance();
+      }
+
+      @java.lang.Override
+      public io.greptime.v1.Common.Metrics build() {
+        io.greptime.v1.Common.Metrics result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(result);
+        }
+        return result;
+      }
+
+      @java.lang.Override
+      public io.greptime.v1.Common.Metrics buildPartial() {
+        io.greptime.v1.Common.Metrics result = new io.greptime.v1.Common.Metrics(this);
+        result.metrics_ = metrics_;
+        onBuilt();
+        return result;
+      }
+
+      @java.lang.Override
+      public Builder clone() {
+        return super.clone();
+      }
+      @java.lang.Override
+      public Builder setField(
+          com.google.protobuf.Descriptors.FieldDescriptor field,
+          java.lang.Object value) {
+        return super.setField(field, value);
+      }
+      @java.lang.Override
+      public Builder clearField(
+          com.google.protobuf.Descriptors.FieldDescriptor field) {
+        return super.clearField(field);
+      }
+      @java.lang.Override
+      public Builder clearOneof(
+          com.google.protobuf.Descriptors.OneofDescriptor oneof) {
+        return super.clearOneof(oneof);
+      }
+      @java.lang.Override
+      public Builder setRepeatedField(
+          com.google.protobuf.Descriptors.FieldDescriptor field,
+          int index, java.lang.Object value) {
+        return super.setRepeatedField(field, index, value);
+      }
+      @java.lang.Override
+      public Builder addRepeatedField(
+          com.google.protobuf.Descriptors.FieldDescriptor field,
+          java.lang.Object value) {
+        return super.addRepeatedField(field, value);
+      }
+      @java.lang.Override
+      public Builder mergeFrom(com.google.protobuf.Message other) {
+        if (other instanceof io.greptime.v1.Common.Metrics) {
+          return mergeFrom((io.greptime.v1.Common.Metrics)other);
+        } else {
+          super.mergeFrom(other);
+          return this;
+        }
+      }
+
+      public Builder mergeFrom(io.greptime.v1.Common.Metrics other) {
+        if (other == io.greptime.v1.Common.Metrics.getDefaultInstance()) return this;
+        if (other.getMetrics() != com.google.protobuf.ByteString.EMPTY) {
+          setMetrics(other.getMetrics());
+        }
+        this.mergeUnknownFields(other.unknownFields);
+        onChanged();
+        return this;
+      }
+
+      @java.lang.Override
+      public final boolean isInitialized() {
+        return true;
+      }
+
+      @java.lang.Override
+      public Builder mergeFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        io.greptime.v1.Common.Metrics parsedMessage = null;
+        try {
+          parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          parsedMessage = (io.greptime.v1.Common.Metrics) e.getUnfinishedMessage();
+          throw e.unwrapIOException();
+        } finally {
+          if (parsedMessage != null) {
+            mergeFrom(parsedMessage);
+          }
+        }
+        return this;
+      }
+
+      private com.google.protobuf.ByteString metrics_ = com.google.protobuf.ByteString.EMPTY;
+      /**
+       * <code>bytes metrics = 1;</code>
+       * @return The metrics.
+       */
+      @java.lang.Override
+      public com.google.protobuf.ByteString getMetrics() {
+        return metrics_;
+      }
+      /**
+       * <code>bytes metrics = 1;</code>
+       * @param value The metrics to set.
+       * @return This builder for chaining.
+       */
+      public Builder setMetrics(com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  
+        metrics_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>bytes metrics = 1;</code>
+       * @return This builder for chaining.
+       */
+      public Builder clearMetrics() {
+        
+        metrics_ = getDefaultInstance().getMetrics();
+        onChanged();
+        return this;
+      }
+      @java.lang.Override
+      public final Builder setUnknownFields(
+          final com.google.protobuf.UnknownFieldSet unknownFields) {
+        return super.setUnknownFields(unknownFields);
+      }
+
+      @java.lang.Override
+      public final Builder mergeUnknownFields(
+          final com.google.protobuf.UnknownFieldSet unknownFields) {
+        return super.mergeUnknownFields(unknownFields);
+      }
+
+
+      // @@protoc_insertion_point(builder_scope:greptime.v1.Metrics)
+    }
+
+    // @@protoc_insertion_point(class_scope:greptime.v1.Metrics)
+    private static final io.greptime.v1.Common.Metrics DEFAULT_INSTANCE;
+    static {
+      DEFAULT_INSTANCE = new io.greptime.v1.Common.Metrics();
+    }
+
+    public static io.greptime.v1.Common.Metrics getDefaultInstance() {
+      return DEFAULT_INSTANCE;
+    }
+
+    private static final com.google.protobuf.Parser<Metrics>
+        PARSER = new com.google.protobuf.AbstractParser<Metrics>() {
+      @java.lang.Override
+      public Metrics parsePartialFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return new Metrics(input, extensionRegistry);
+      }
+    };
+
+    public static com.google.protobuf.Parser<Metrics> parser() {
+      return PARSER;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Parser<Metrics> getParserForType() {
+      return PARSER;
+    }
+
+    @java.lang.Override
+    public io.greptime.v1.Common.Metrics getDefaultInstanceForType() {
+      return DEFAULT_INSTANCE;
+    }
+
+  }
+
   public interface FlightMetadataOrBuilder extends
       // @@protoc_insertion_point(interface_extends:greptime.v1.FlightMetadata)
       com.google.protobuf.MessageOrBuilder {
@@ -6364,6 +6858,21 @@ java.lang.String defaultValue);
      * <code>.greptime.v1.AffectedRows affected_rows = 1;</code>
      */
     io.greptime.v1.Common.AffectedRowsOrBuilder getAffectedRowsOrBuilder();
+
+    /**
+     * <code>.greptime.v1.Metrics metrics = 2;</code>
+     * @return Whether the metrics field is set.
+     */
+    boolean hasMetrics();
+    /**
+     * <code>.greptime.v1.Metrics metrics = 2;</code>
+     * @return The metrics.
+     */
+    io.greptime.v1.Common.Metrics getMetrics();
+    /**
+     * <code>.greptime.v1.Metrics metrics = 2;</code>
+     */
+    io.greptime.v1.Common.MetricsOrBuilder getMetricsOrBuilder();
   }
   /**
    * Protobuf type {@code greptime.v1.FlightMetadata}
@@ -6423,6 +6932,19 @@ java.lang.String defaultValue);
 
               break;
             }
+            case 18: {
+              io.greptime.v1.Common.Metrics.Builder subBuilder = null;
+              if (metrics_ != null) {
+                subBuilder = metrics_.toBuilder();
+              }
+              metrics_ = input.readMessage(io.greptime.v1.Common.Metrics.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(metrics_);
+                metrics_ = subBuilder.buildPartial();
+              }
+
+              break;
+            }
             default: {
               if (!parseUnknownField(
                   input, unknownFields, extensionRegistry, tag)) {
@@ -6483,6 +7005,32 @@ java.lang.String defaultValue);
       return getAffectedRows();
     }
 
+    public static final int METRICS_FIELD_NUMBER = 2;
+    private io.greptime.v1.Common.Metrics metrics_;
+    /**
+     * <code>.greptime.v1.Metrics metrics = 2;</code>
+     * @return Whether the metrics field is set.
+     */
+    @java.lang.Override
+    public boolean hasMetrics() {
+      return metrics_ != null;
+    }
+    /**
+     * <code>.greptime.v1.Metrics metrics = 2;</code>
+     * @return The metrics.
+     */
+    @java.lang.Override
+    public io.greptime.v1.Common.Metrics getMetrics() {
+      return metrics_ == null ? io.greptime.v1.Common.Metrics.getDefaultInstance() : metrics_;
+    }
+    /**
+     * <code>.greptime.v1.Metrics metrics = 2;</code>
+     */
+    @java.lang.Override
+    public io.greptime.v1.Common.MetricsOrBuilder getMetricsOrBuilder() {
+      return getMetrics();
+    }
+
     private byte memoizedIsInitialized = -1;
     @java.lang.Override
     public final boolean isInitialized() {
@@ -6500,6 +7048,9 @@ java.lang.String defaultValue);
       if (affectedRows_ != null) {
         output.writeMessage(1, getAffectedRows());
       }
+      if (metrics_ != null) {
+        output.writeMessage(2, getMetrics());
+      }
       unknownFields.writeTo(output);
     }
 
@@ -6513,6 +7064,10 @@ java.lang.String defaultValue);
         size += com.google.protobuf.CodedOutputStream
           .computeMessageSize(1, getAffectedRows());
       }
+      if (metrics_ != null) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(2, getMetrics());
+      }
       size += unknownFields.getSerializedSize();
       memoizedSize = size;
       return size;
@@ -6533,6 +7088,11 @@ java.lang.String defaultValue);
         if (!getAffectedRows()
             .equals(other.getAffectedRows())) return false;
       }
+      if (hasMetrics() != other.hasMetrics()) return false;
+      if (hasMetrics()) {
+        if (!getMetrics()
+            .equals(other.getMetrics())) return false;
+      }
       if (!unknownFields.equals(other.unknownFields)) return false;
       return true;
     }
@@ -6548,6 +7108,10 @@ java.lang.String defaultValue);
         hash = (37 * hash) + AFFECTED_ROWS_FIELD_NUMBER;
         hash = (53 * hash) + getAffectedRows().hashCode();
       }
+      if (hasMetrics()) {
+        hash = (37 * hash) + METRICS_FIELD_NUMBER;
+        hash = (53 * hash) + getMetrics().hashCode();
+      }
       hash = (29 * hash) + unknownFields.hashCode();
       memoizedHashCode = hash;
       return hash;
@@ -6687,6 +7251,12 @@ java.lang.String defaultValue);
           affectedRows_ = null;
           affectedRowsBuilder_ = null;
         }
+        if (metricsBuilder_ == null) {
+          metrics_ = null;
+        } else {
+          metrics_ = null;
+          metricsBuilder_ = null;
+        }
         return this;
       }
 
@@ -6718,6 +7288,11 @@ java.lang.String defaultValue);
         } else {
           result.affectedRows_ = affectedRowsBuilder_.build();
         }
+        if (metricsBuilder_ == null) {
+          result.metrics_ = metrics_;
+        } else {
+          result.metrics_ = metricsBuilder_.build();
+        }
         onBuilt();
         return result;
       }
@@ -6769,6 +7344,9 @@ java.lang.String defaultValue);
         if (other.hasAffectedRows()) {
           mergeAffectedRows(other.getAffectedRows());
         }
+        if (other.hasMetrics()) {
+          mergeMetrics(other.getMetrics());
+        }
         this.mergeUnknownFields(other.unknownFields);
         onChanged();
         return this;
@@ -6916,6 +7494,125 @@ java.lang.String defaultValue);
         }
         return affectedRowsBuilder_;
       }
+
+      private io.greptime.v1.Common.Metrics metrics_;
+      private com.google.protobuf.SingleFieldBuilderV3<
+          io.greptime.v1.Common.Metrics, io.greptime.v1.Common.Metrics.Builder, io.greptime.v1.Common.MetricsOrBuilder> metricsBuilder_;
+      /**
+       * <code>.greptime.v1.Metrics metrics = 2;</code>
+       * @return Whether the metrics field is set.
+       */
+      public boolean hasMetrics() {
+        return metricsBuilder_ != null || metrics_ != null;
+      }
+      /**
+       * <code>.greptime.v1.Metrics metrics = 2;</code>
+       * @return The metrics.
+       */
+      public io.greptime.v1.Common.Metrics getMetrics() {
+        if (metricsBuilder_ == null) {
+          return metrics_ == null ? io.greptime.v1.Common.Metrics.getDefaultInstance() : metrics_;
+        } else {
+          return metricsBuilder_.getMessage();
+        }
+      }
+      /**
+       * <code>.greptime.v1.Metrics metrics = 2;</code>
+       */
+      public Builder setMetrics(io.greptime.v1.Common.Metrics value) {
+        if (metricsBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          metrics_ = value;
+          onChanged();
+        } else {
+          metricsBuilder_.setMessage(value);
+        }
+
+        return this;
+      }
+      /**
+       * <code>.greptime.v1.Metrics metrics = 2;</code>
+       */
+      public Builder setMetrics(
+          io.greptime.v1.Common.Metrics.Builder builderForValue) {
+        if (metricsBuilder_ == null) {
+          metrics_ = builderForValue.build();
+          onChanged();
+        } else {
+          metricsBuilder_.setMessage(builderForValue.build());
+        }
+
+        return this;
+      }
+      /**
+       * <code>.greptime.v1.Metrics metrics = 2;</code>
+       */
+      public Builder mergeMetrics(io.greptime.v1.Common.Metrics value) {
+        if (metricsBuilder_ == null) {
+          if (metrics_ != null) {
+            metrics_ =
+              io.greptime.v1.Common.Metrics.newBuilder(metrics_).mergeFrom(value).buildPartial();
+          } else {
+            metrics_ = value;
+          }
+          onChanged();
+        } else {
+          metricsBuilder_.mergeFrom(value);
+        }
+
+        return this;
+      }
+      /**
+       * <code>.greptime.v1.Metrics metrics = 2;</code>
+       */
+      public Builder clearMetrics() {
+        if (metricsBuilder_ == null) {
+          metrics_ = null;
+          onChanged();
+        } else {
+          metrics_ = null;
+          metricsBuilder_ = null;
+        }
+
+        return this;
+      }
+      /**
+       * <code>.greptime.v1.Metrics metrics = 2;</code>
+       */
+      public io.greptime.v1.Common.Metrics.Builder getMetricsBuilder() {
+        
+        onChanged();
+        return getMetricsFieldBuilder().getBuilder();
+      }
+      /**
+       * <code>.greptime.v1.Metrics metrics = 2;</code>
+       */
+      public io.greptime.v1.Common.MetricsOrBuilder getMetricsOrBuilder() {
+        if (metricsBuilder_ != null) {
+          return metricsBuilder_.getMessageOrBuilder();
+        } else {
+          return metrics_ == null ?
+              io.greptime.v1.Common.Metrics.getDefaultInstance() : metrics_;
+        }
+      }
+      /**
+       * <code>.greptime.v1.Metrics metrics = 2;</code>
+       */
+      private com.google.protobuf.SingleFieldBuilderV3<
+          io.greptime.v1.Common.Metrics, io.greptime.v1.Common.Metrics.Builder, io.greptime.v1.Common.MetricsOrBuilder> 
+          getMetricsFieldBuilder() {
+        if (metricsBuilder_ == null) {
+          metricsBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
+              io.greptime.v1.Common.Metrics, io.greptime.v1.Common.Metrics.Builder, io.greptime.v1.Common.MetricsOrBuilder>(
+                  getMetrics(),
+                  getParentForChildren(),
+                  isClean());
+          metrics_ = null;
+        }
+        return metricsBuilder_;
+      }
       @java.lang.Override
       public final Builder setUnknownFields(
           final com.google.protobuf.UnknownFieldSet unknownFields) {
@@ -9499,6 +10196,11 @@ java.lang.String defaultValue);
   private static final 
     com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
       internal_static_greptime_v1_AffectedRows_fieldAccessorTable;
+  private static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_greptime_v1_Metrics_descriptor;
+  private static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_greptime_v1_Metrics_fieldAccessorTable;
   private static final com.google.protobuf.Descriptors.Descriptor
     internal_static_greptime_v1_FlightMetadata_descriptor;
   private static final 
@@ -9548,33 +10250,35 @@ java.lang.String defaultValue);
       ".v1.TokenH\000B\r\n\013auth_scheme\"+\n\005Basic\022\020\n\010u" +
       "sername\030\001 \001(\t\022\020\n\010password\030\002 \001(\t\"\026\n\005Token" +
       "\022\r\n\005token\030\001 \001(\t\"\035\n\014AffectedRows\022\r\n\005value" +
-      "\030\001 \001(\r\"B\n\016FlightMetadata\0220\n\raffected_row" +
+      "\030\001 \001(\r\"\032\n\007Metrics\022\017\n\007metrics\030\001 \001(\014\"i\n\016Fl" +
-      "s\030\001 \001(\0132\031.greptime.v1.AffectedRows\"I\n\024In" +
+      "ightMetadata\0220\n\raffected_rows\030\001 \001(\0132\031.gr" +
-      "tervalMonthDayNano\022\016\n\006months\030\001 \001(\005\022\014\n\004da" +
+      "eptime.v1.AffectedRows\022%\n\007metrics\030\002 \001(\0132" +
-      "ys\030\002 \001(\005\022\023\n\013nanoseconds\030\003 \001(\003\"$\n\nDecimal" +
+      "\024.greptime.v1.Metrics\"I\n\024IntervalMonthDa" +
-      "128\022\n\n\002hi\030\001 \001(\003\022\n\n\002lo\030\002 \001(\003\"`\n\027ColumnDat" +
+      "yNano\022\016\n\006months\030\001 \001(\005\022\014\n\004days\030\002 \001(\005\022\023\n\013n" +
-      "aTypeExtension\0229\n\014decimal_type\030\001 \001(\0132!.g" +
+      "anoseconds\030\003 \001(\003\"$\n\nDecimal128\022\n\n\002hi\030\001 \001" +
-      "reptime.v1.DecimalTypeExtensionH\000B\n\n\010typ" +
+      "(\003\022\n\n\002lo\030\002 \001(\003\"`\n\027ColumnDataTypeExtensio" +
-      "e_ext\"8\n\024DecimalTypeExtension\022\021\n\tprecisi" +
+      "n\0229\n\014decimal_type\030\001 \001(\0132!.greptime.v1.De" +
-      "on\030\001 \001(\005\022\r\n\005scale\030\002 \001(\005*1\n\014SemanticType\022" +
+      "cimalTypeExtensionH\000B\n\n\010type_ext\"8\n\024Deci" +
-      "\007\n\003TAG\020\000\022\t\n\005FIELD\020\001\022\r\n\tTIMESTAMP\020\002*\270\004\n\016C" +
+      "malTypeExtension\022\021\n\tprecision\030\001 \001(\005\022\r\n\005s" +
-      "olumnDataType\022\013\n\007BOOLEAN\020\000\022\010\n\004INT8\020\001\022\t\n\005" +
+      "cale\030\002 \001(\005*1\n\014SemanticType\022\007\n\003TAG\020\000\022\t\n\005F" +
-      "INT16\020\002\022\t\n\005INT32\020\003\022\t\n\005INT64\020\004\022\t\n\005UINT8\020\005" +
+      "IELD\020\001\022\r\n\tTIMESTAMP\020\002*\270\004\n\016ColumnDataType" +
-      "\022\n\n\006UINT16\020\006\022\n\n\006UINT32\020\007\022\n\n\006UINT64\020\010\022\013\n\007" +
+      "\022\013\n\007BOOLEAN\020\000\022\010\n\004INT8\020\001\022\t\n\005INT16\020\002\022\t\n\005IN" +
-      "FLOAT32\020\t\022\013\n\007FLOAT64\020\n\022\n\n\006BINARY\020\013\022\n\n\006ST" +
+      "T32\020\003\022\t\n\005INT64\020\004\022\t\n\005UINT8\020\005\022\n\n\006UINT16\020\006\022" +
-      "RING\020\014\022\010\n\004DATE\020\r\022\014\n\010DATETIME\020\016\022\024\n\020TIMEST" +
+      "\n\n\006UINT32\020\007\022\n\n\006UINT64\020\010\022\013\n\007FLOAT32\020\t\022\013\n\007" +
-      "AMP_SECOND\020\017\022\031\n\025TIMESTAMP_MILLISECOND\020\020\022" +
+      "FLOAT64\020\n\022\n\n\006BINARY\020\013\022\n\n\006STRING\020\014\022\010\n\004DAT" +
-      "\031\n\025TIMESTAMP_MICROSECOND\020\021\022\030\n\024TIMESTAMP_" +
+      "E\020\r\022\014\n\010DATETIME\020\016\022\024\n\020TIMESTAMP_SECOND\020\017\022" +
-      "NANOSECOND\020\022\022\017\n\013TIME_SECOND\020\023\022\024\n\020TIME_MI" +
+      "\031\n\025TIMESTAMP_MILLISECOND\020\020\022\031\n\025TIMESTAMP_" +
-      "LLISECOND\020\024\022\024\n\020TIME_MICROSECOND\020\025\022\023\n\017TIM" +
+      "MICROSECOND\020\021\022\030\n\024TIMESTAMP_NANOSECOND\020\022\022" +
-      "E_NANOSECOND\020\026\022\027\n\023INTERVAL_YEAR_MONTH\020\027\022" +
+      "\017\n\013TIME_SECOND\020\023\022\024\n\020TIME_MILLISECOND\020\024\022\024" +
-      "\025\n\021INTERVAL_DAY_TIME\020\030\022\033\n\027INTERVAL_MONTH" +
+      "\n\020TIME_MICROSECOND\020\025\022\023\n\017TIME_NANOSECOND\020" +
-      "_DAY_NANO\020\031\022\023\n\017DURATION_SECOND\020\032\022\030\n\024DURA" +
+      "\026\022\027\n\023INTERVAL_YEAR_MONTH\020\027\022\025\n\021INTERVAL_D" +
-      "TION_MILLISECOND\020\033\022\030\n\024DURATION_MICROSECO" +
+      "AY_TIME\020\030\022\033\n\027INTERVAL_MONTH_DAY_NANO\020\031\022\023" +
-      "ND\020\034\022\027\n\023DURATION_NANOSECOND\020\035\022\016\n\nDECIMAL" +
+      "\n\017DURATION_SECOND\020\032\022\030\n\024DURATION_MILLISEC" +
-      "128\020\036BO\n\016io.greptime.v1B\006CommonZ5github." +
+      "OND\020\033\022\030\n\024DURATION_MICROSECOND\020\034\022\027\n\023DURAT" +
-      "com/GreptimeTeam/greptime-proto/go/grept" +
+      "ION_NANOSECOND\020\035\022\016\n\nDECIMAL128\020\036BO\n\016io.g" +
-      "ime/v1b\006proto3"
+      "reptime.v1B\006CommonZ5github.com/GreptimeT" +
+      "eam/greptime-proto/go/greptime/v1b\006proto" +
+      "3"
     };
     descriptor = com.google.protobuf.Descriptors.FileDescriptor
       .internalBuildGeneratedFileFrom(descriptorData,
@@ -9628,32 +10332,38 @@ java.lang.String defaultValue);
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_AffectedRows_descriptor,
         new java.lang.String[] { "Value", });
-    internal_static_greptime_v1_FlightMetadata_descriptor =
+    internal_static_greptime_v1_Metrics_descriptor =
       getDescriptor().getMessageTypes().get(7);
+    internal_static_greptime_v1_Metrics_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_greptime_v1_Metrics_descriptor,
+        new java.lang.String[] { "Metrics", });
+    internal_static_greptime_v1_FlightMetadata_descriptor =
+      getDescriptor().getMessageTypes().get(8);
     internal_static_greptime_v1_FlightMetadata_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_FlightMetadata_descriptor,
-        new java.lang.String[] { "AffectedRows", });
+        new java.lang.String[] { "AffectedRows", "Metrics", });
     internal_static_greptime_v1_IntervalMonthDayNano_descriptor =
-      getDescriptor().getMessageTypes().get(8);
+      getDescriptor().getMessageTypes().get(9);
     internal_static_greptime_v1_IntervalMonthDayNano_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_IntervalMonthDayNano_descriptor,
         new java.lang.String[] { "Months", "Days", "Nanoseconds", });
     internal_static_greptime_v1_Decimal128_descriptor =
-      getDescriptor().getMessageTypes().get(9);
+      getDescriptor().getMessageTypes().get(10);
     internal_static_greptime_v1_Decimal128_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_Decimal128_descriptor,
         new java.lang.String[] { "Hi", "Lo", });
     internal_static_greptime_v1_ColumnDataTypeExtension_descriptor =
-      getDescriptor().getMessageTypes().get(10);
+      getDescriptor().getMessageTypes().get(11);
     internal_static_greptime_v1_ColumnDataTypeExtension_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_ColumnDataTypeExtension_descriptor,
         new java.lang.String[] { "DecimalType", "TypeExt", });
     internal_static_greptime_v1_DecimalTypeExtension_descriptor =
-      getDescriptor().getMessageTypes().get(11);
+      getDescriptor().getMessageTypes().get(12);
     internal_static_greptime_v1_DecimalTypeExtension_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_DecimalTypeExtension_descriptor,

proto/greptime/v1/common.proto

@@ -60,7 +60,14 @@ message Token { string token = 1; }
 
 message AffectedRows { uint32 value = 1; }
 
-message FlightMetadata { AffectedRows affected_rows = 1; }
+message Metrics {
+  bytes metrics = 1;
+}
+
+message FlightMetadata { 
+  AffectedRows affected_rows = 1; 
+  Metrics metrics = 2;
+}
 
 enum SemanticType {
   TAG = 0;