feat: add drop database expr (#139)

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

@@ -146,6 +146,21 @@ struct TruncateTableExprDefaultTypeInternal {
   };
 };
 PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 TruncateTableExprDefaultTypeInternal _TruncateTableExpr_default_instance_;
+PROTOBUF_CONSTEXPR DropDatabaseExpr::DropDatabaseExpr(
+    ::_pbi::ConstantInitialized): _impl_{
+    /*decltype(_impl_.catalog_name_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
+  , /*decltype(_impl_.schema_name_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
+  , /*decltype(_impl_.drop_if_exists_)*/false
+  , /*decltype(_impl_._cached_size_)*/{}} {}
+struct DropDatabaseExprDefaultTypeInternal {
+  PROTOBUF_CONSTEXPR DropDatabaseExprDefaultTypeInternal()
+      : _instance(::_pbi::ConstantInitialized{}) {}
+  ~DropDatabaseExprDefaultTypeInternal() {}
+  union {
+    DropDatabaseExpr _instance;
+  };
+};
+PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 DropDatabaseExprDefaultTypeInternal _DropDatabaseExpr_default_instance_;
 PROTOBUF_CONSTEXPR AddColumns::AddColumns(
     ::_pbi::ConstantInitialized): _impl_{
     /*decltype(_impl_.add_columns_)*/{}
@@ -260,7 +275,7 @@ struct AddColumnLocationDefaultTypeInternal {
 PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 AddColumnLocationDefaultTypeInternal _AddColumnLocation_default_instance_;
 }  // namespace v1
 }  // namespace greptime
-static ::_pb::Metadata file_level_metadata_greptime_2fv1_2fddl_2eproto[16];
+static ::_pb::Metadata file_level_metadata_greptime_2fv1_2fddl_2eproto[17];
 static const ::_pb::EnumDescriptor* file_level_enum_descriptors_greptime_2fv1_2fddl_2eproto[1];
 static constexpr ::_pb::ServiceDescriptor const** file_level_service_descriptors_greptime_2fv1_2fddl_2eproto = nullptr;
 
@@ -358,6 +373,15 @@ const uint32_t TableStruct_greptime_2fv1_2fddl_2eproto::offsets[] PROTOBUF_SECTI
   PROTOBUF_FIELD_OFFSET(::greptime::v1::TruncateTableExpr, _impl_.table_name_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::TruncateTableExpr, _impl_.table_id_),
   ~0u,  // no _has_bits_
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::DropDatabaseExpr, _internal_metadata_),
+  ~0u,  // no _extensions_
+  ~0u,  // no _oneof_case_
+  ~0u,  // no _weak_field_map_
+  ~0u,  // no _inlined_string_donated_
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::DropDatabaseExpr, _impl_.catalog_name_),
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::DropDatabaseExpr, _impl_.schema_name_),
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::DropDatabaseExpr, _impl_.drop_if_exists_),
+  ~0u,  // no _has_bits_
   PROTOBUF_FIELD_OFFSET(::greptime::v1::AddColumns, _internal_metadata_),
   ~0u,  // no _extensions_
   ~0u,  // no _oneof_case_
@@ -431,14 +455,15 @@ static const ::_pbi::MigrationSchema schemas[] PROTOBUF_SECTION_VARIABLE(protode
   { 63, 71, -1, sizeof(::greptime::v1::CreateDatabaseExpr_OptionsEntry_DoNotUse)},
   { 73, -1, -1, sizeof(::greptime::v1::CreateDatabaseExpr)},
   { 82, -1, -1, sizeof(::greptime::v1::TruncateTableExpr)},
-  { 92, -1, -1, sizeof(::greptime::v1::AddColumns)},
+  { 92, -1, -1, sizeof(::greptime::v1::DropDatabaseExpr)},
-  { 99, -1, -1, sizeof(::greptime::v1::DropColumns)},
+  { 101, -1, -1, sizeof(::greptime::v1::AddColumns)},
-  { 106, -1, -1, sizeof(::greptime::v1::RenameTable)},
+  { 108, -1, -1, sizeof(::greptime::v1::DropColumns)},
-  { 113, -1, -1, sizeof(::greptime::v1::AddColumn)},
+  { 115, -1, -1, sizeof(::greptime::v1::RenameTable)},
-  { 121, -1, -1, sizeof(::greptime::v1::DropColumn)},
+  { 122, -1, -1, sizeof(::greptime::v1::AddColumn)},
-  { 128, -1, -1, sizeof(::greptime::v1::TableId)},
+  { 130, -1, -1, sizeof(::greptime::v1::DropColumn)},
-  { 135, -1, -1, sizeof(::greptime::v1::ColumnDef)},
+  { 137, -1, -1, sizeof(::greptime::v1::TableId)},
-  { 148, -1, -1, sizeof(::greptime::v1::AddColumnLocation)},
+  { 144, -1, -1, sizeof(::greptime::v1::ColumnDef)},
+  { 157, -1, -1, sizeof(::greptime::v1::AddColumnLocation)},
 };
 
 static const ::_pb::Message* const file_default_instances[] = {
@@ -450,6 +475,7 @@ static const ::_pb::Message* const file_default_instances[] = {
   &::greptime::v1::_CreateDatabaseExpr_OptionsEntry_DoNotUse_default_instance_._instance,
   &::greptime::v1::_CreateDatabaseExpr_default_instance_._instance,
   &::greptime::v1::_TruncateTableExpr_default_instance_._instance,
+  &::greptime::v1::_DropDatabaseExpr_default_instance_._instance,
   &::greptime::v1::_AddColumns_default_instance_._instance,
   &::greptime::v1::_DropColumns_default_instance_._instance,
   &::greptime::v1::_RenameTable_default_instance_._instance,
@@ -496,37 +522,39 @@ const char descriptor_table_protodef_greptime_2fv1_2fddl_2eproto[] PROTOBUF_SECT
   "ey\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"z\n\021TruncateT"
   "ableExpr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n\013schema"
   "_name\030\002 \001(\t\022\022\n\ntable_name\030\003 \001(\t\022&\n\010table"
-  "_id\030\004 \001(\0132\024.greptime.v1.TableId\"9\n\nAddCo"
+  "_id\030\004 \001(\0132\024.greptime.v1.TableId\"U\n\020DropD"
-  "lumns\022+\n\013add_columns\030\001 \003(\0132\026.greptime.v1"
+  "atabaseExpr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n\013sch"
-  ".AddColumn\"<\n\013DropColumns\022-\n\014drop_column"
+  "ema_name\030\002 \001(\t\022\026\n\016drop_if_exists\030\003 \001(\010\"9"
-  "s\030\001 \003(\0132\027.greptime.v1.DropColumn\"%\n\013Rena"
+  "\n\nAddColumns\022+\n\013add_columns\030\001 \003(\0132\026.grep"
-  "meTable\022\026\n\016new_table_name\030\001 \001(\t\"i\n\tAddCo"
+  "time.v1.AddColumn\"<\n\013DropColumns\022-\n\014drop"
-  "lumn\022*\n\ncolumn_def\030\001 \001(\0132\026.greptime.v1.C"
+  "_columns\030\001 \003(\0132\027.greptime.v1.DropColumn\""
-  "olumnDef\0220\n\010location\030\003 \001(\0132\036.greptime.v1"
+  "%\n\013RenameTable\022\026\n\016new_table_name\030\001 \001(\t\"i"
-  ".AddColumnLocation\"\032\n\nDropColumn\022\014\n\004name"
+  "\n\tAddColumn\022*\n\ncolumn_def\030\001 \001(\0132\026.grepti"
-  "\030\001 \001(\t\"\025\n\007TableId\022\n\n\002id\030\001 \001(\r\"\377\001\n\tColumn"
+  "me.v1.ColumnDef\0220\n\010location\030\003 \001(\0132\036.grep"
-  "Def\022\014\n\004name\030\001 \001(\t\022.\n\tdata_type\030\002 \001(\0162\033.g"
+  "time.v1.AddColumnLocation\"\032\n\nDropColumn\022"
-  "reptime.v1.ColumnDataType\022\023\n\013is_nullable"
+  "\014\n\004name\030\001 \001(\t\"\025\n\007TableId\022\n\n\002id\030\001 \001(\r\"\377\001\n"
-  "\030\003 \001(\010\022\032\n\022default_constraint\030\004 \001(\014\0220\n\rse"
+  "\tColumnDef\022\014\n\004name\030\001 \001(\t\022.\n\tdata_type\030\002 "
-  "mantic_type\030\005 \001(\0162\031.greptime.v1.Semantic"
+  "\001(\0162\033.greptime.v1.ColumnDataType\022\023\n\013is_n"
-  "Type\022\017\n\007comment\030\006 \001(\t\022@\n\022datatype_extens"
+  "ullable\030\003 \001(\010\022\032\n\022default_constraint\030\004 \001("
-  "ion\030\007 \001(\0132$.greptime.v1.ColumnDataTypeEx"
+  "\014\0220\n\rsemantic_type\030\005 \001(\0162\031.greptime.v1.S"
-  "tension\"\230\001\n\021AddColumnLocation\022B\n\rlocatio"
+  "emanticType\022\017\n\007comment\030\006 \001(\t\022@\n\022datatype"
-  "n_type\030\001 \001(\0162+.greptime.v1.AddColumnLoca"
+  "_extension\030\007 \001(\0132$.greptime.v1.ColumnDat"
-  "tion.LocationType\022\031\n\021after_column_name\030\002"
+  "aTypeExtension\"\230\001\n\021AddColumnLocation\022B\n\r"
-  " \001(\t\"$\n\014LocationType\022\t\n\005FIRST\020\000\022\t\n\005AFTER"
+  "location_type\030\001 \001(\0162+.greptime.v1.AddCol"
-  "\020\001BL\n\016io.greptime.v1B\003DdlZ5github.com/Gr"
+  "umnLocation.LocationType\022\031\n\021after_column"
-  "eptimeTeam/greptime-proto/go/greptime/v1"
+  "_name\030\002 \001(\t\"$\n\014LocationType\022\t\n\005FIRST\020\000\022\t"
-  "b\006proto3"
+  "\n\005AFTER\020\001BL\n\016io.greptime.v1B\003DdlZ5github"
+  ".com/GreptimeTeam/greptime-proto/go/grep"
+  "time/v1b\006proto3"
   ;
 static const ::_pbi::DescriptorTable* const descriptor_table_greptime_2fv1_2fddl_2eproto_deps[1] = {
   &::descriptor_table_greptime_2fv1_2fcommon_2eproto,
 };
 static ::_pbi::once_flag descriptor_table_greptime_2fv1_2fddl_2eproto_once;
 const ::_pbi::DescriptorTable descriptor_table_greptime_2fv1_2fddl_2eproto = {
-    false, false, 2248, descriptor_table_protodef_greptime_2fv1_2fddl_2eproto,
+    false, false, 2335, descriptor_table_protodef_greptime_2fv1_2fddl_2eproto,
     "greptime/v1/ddl.proto",
-    &descriptor_table_greptime_2fv1_2fddl_2eproto_once, descriptor_table_greptime_2fv1_2fddl_2eproto_deps, 1, 16,
+    &descriptor_table_greptime_2fv1_2fddl_2eproto_once, descriptor_table_greptime_2fv1_2fddl_2eproto_deps, 1, 17,
     schemas, file_default_instances, TableStruct_greptime_2fv1_2fddl_2eproto::offsets,
     file_level_metadata_greptime_2fv1_2fddl_2eproto, file_level_enum_descriptors_greptime_2fv1_2fddl_2eproto,
     file_level_service_descriptors_greptime_2fv1_2fddl_2eproto,
@@ -3271,6 +3299,286 @@ void TruncateTableExpr::InternalSwap(TruncateTableExpr* other) {
 
 // ===================================================================
 
+class DropDatabaseExpr::_Internal {
+ public:
+};
+
+DropDatabaseExpr::DropDatabaseExpr(::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.DropDatabaseExpr)
+}
+DropDatabaseExpr::DropDatabaseExpr(const DropDatabaseExpr& from)
+  : ::PROTOBUF_NAMESPACE_ID::Message() {
+  DropDatabaseExpr* const _this = this; (void)_this;
+  new (&_impl_) Impl_{
+      decltype(_impl_.catalog_name_){}
+    , decltype(_impl_.schema_name_){}
+    , decltype(_impl_.drop_if_exists_){}
+    , /*decltype(_impl_._cached_size_)*/{}};
+
+  _internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
+  _impl_.catalog_name_.InitDefault();
+  #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+    _impl_.catalog_name_.Set("", GetArenaForAllocation());
+  #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  if (!from._internal_catalog_name().empty()) {
+    _this->_impl_.catalog_name_.Set(from._internal_catalog_name(), 
+      _this->GetArenaForAllocation());
+  }
+  _impl_.schema_name_.InitDefault();
+  #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+    _impl_.schema_name_.Set("", GetArenaForAllocation());
+  #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  if (!from._internal_schema_name().empty()) {
+    _this->_impl_.schema_name_.Set(from._internal_schema_name(), 
+      _this->GetArenaForAllocation());
+  }
+  _this->_impl_.drop_if_exists_ = from._impl_.drop_if_exists_;
+  // @@protoc_insertion_point(copy_constructor:greptime.v1.DropDatabaseExpr)
+}
+
+inline void DropDatabaseExpr::SharedCtor(
+    ::_pb::Arena* arena, bool is_message_owned) {
+  (void)arena;
+  (void)is_message_owned;
+  new (&_impl_) Impl_{
+      decltype(_impl_.catalog_name_){}
+    , decltype(_impl_.schema_name_){}
+    , decltype(_impl_.drop_if_exists_){false}
+    , /*decltype(_impl_._cached_size_)*/{}
+  };
+  _impl_.catalog_name_.InitDefault();
+  #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+    _impl_.catalog_name_.Set("", GetArenaForAllocation());
+  #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  _impl_.schema_name_.InitDefault();
+  #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+    _impl_.schema_name_.Set("", GetArenaForAllocation());
+  #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+}
+
+DropDatabaseExpr::~DropDatabaseExpr() {
+  // @@protoc_insertion_point(destructor:greptime.v1.DropDatabaseExpr)
+  if (auto *arena = _internal_metadata_.DeleteReturnArena<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>()) {
+  (void)arena;
+    return;
+  }
+  SharedDtor();
+}
+
+inline void DropDatabaseExpr::SharedDtor() {
+  GOOGLE_DCHECK(GetArenaForAllocation() == nullptr);
+  _impl_.catalog_name_.Destroy();
+  _impl_.schema_name_.Destroy();
+}
+
+void DropDatabaseExpr::SetCachedSize(int size) const {
+  _impl_._cached_size_.Set(size);
+}
+
+void DropDatabaseExpr::Clear() {
+// @@protoc_insertion_point(message_clear_start:greptime.v1.DropDatabaseExpr)
+  uint32_t cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  _impl_.catalog_name_.ClearToEmpty();
+  _impl_.schema_name_.ClearToEmpty();
+  _impl_.drop_if_exists_ = false;
+  _internal_metadata_.Clear<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>();
+}
+
+const char* DropDatabaseExpr::_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) {
+      // string catalog_name = 1;
+      case 1:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 10)) {
+          auto str = _internal_mutable_catalog_name();
+          ptr = ::_pbi::InlineGreedyStringParser(str, ptr, ctx);
+          CHK_(ptr);
+          CHK_(::_pbi::VerifyUTF8(str, "greptime.v1.DropDatabaseExpr.catalog_name"));
+        } else
+          goto handle_unusual;
+        continue;
+      // string schema_name = 2;
+      case 2:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 18)) {
+          auto str = _internal_mutable_schema_name();
+          ptr = ::_pbi::InlineGreedyStringParser(str, ptr, ctx);
+          CHK_(ptr);
+          CHK_(::_pbi::VerifyUTF8(str, "greptime.v1.DropDatabaseExpr.schema_name"));
+        } else
+          goto handle_unusual;
+        continue;
+      // bool drop_if_exists = 3;
+      case 3:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 24)) {
+          _impl_.drop_if_exists_ = ::PROTOBUF_NAMESPACE_ID::internal::ReadVarint64(&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* DropDatabaseExpr::_InternalSerialize(
+    uint8_t* target, ::PROTOBUF_NAMESPACE_ID::io::EpsCopyOutputStream* stream) const {
+  // @@protoc_insertion_point(serialize_to_array_start:greptime.v1.DropDatabaseExpr)
+  uint32_t cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  // string catalog_name = 1;
+  if (!this->_internal_catalog_name().empty()) {
+    ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::VerifyUtf8String(
+      this->_internal_catalog_name().data(), static_cast<int>(this->_internal_catalog_name().length()),
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::SERIALIZE,
+      "greptime.v1.DropDatabaseExpr.catalog_name");
+    target = stream->WriteStringMaybeAliased(
+        1, this->_internal_catalog_name(), target);
+  }
+
+  // string schema_name = 2;
+  if (!this->_internal_schema_name().empty()) {
+    ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::VerifyUtf8String(
+      this->_internal_schema_name().data(), static_cast<int>(this->_internal_schema_name().length()),
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::SERIALIZE,
+      "greptime.v1.DropDatabaseExpr.schema_name");
+    target = stream->WriteStringMaybeAliased(
+        2, this->_internal_schema_name(), target);
+  }
+
+  // bool drop_if_exists = 3;
+  if (this->_internal_drop_if_exists() != 0) {
+    target = stream->EnsureSpace(target);
+    target = ::_pbi::WireFormatLite::WriteBoolToArray(3, this->_internal_drop_if_exists(), 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.DropDatabaseExpr)
+  return target;
+}
+
+size_t DropDatabaseExpr::ByteSizeLong() const {
+// @@protoc_insertion_point(message_byte_size_start:greptime.v1.DropDatabaseExpr)
+  size_t total_size = 0;
+
+  uint32_t cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  // string catalog_name = 1;
+  if (!this->_internal_catalog_name().empty()) {
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::StringSize(
+        this->_internal_catalog_name());
+  }
+
+  // string schema_name = 2;
+  if (!this->_internal_schema_name().empty()) {
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::StringSize(
+        this->_internal_schema_name());
+  }
+
+  // bool drop_if_exists = 3;
+  if (this->_internal_drop_if_exists() != 0) {
+    total_size += 1 + 1;
+  }
+
+  return MaybeComputeUnknownFieldsSize(total_size, &_impl_._cached_size_);
+}
+
+const ::PROTOBUF_NAMESPACE_ID::Message::ClassData DropDatabaseExpr::_class_data_ = {
+    ::PROTOBUF_NAMESPACE_ID::Message::CopyWithSourceCheck,
+    DropDatabaseExpr::MergeImpl
+};
+const ::PROTOBUF_NAMESPACE_ID::Message::ClassData*DropDatabaseExpr::GetClassData() const { return &_class_data_; }
+
+
+void DropDatabaseExpr::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::PROTOBUF_NAMESPACE_ID::Message& from_msg) {
+  auto* const _this = static_cast<DropDatabaseExpr*>(&to_msg);
+  auto& from = static_cast<const DropDatabaseExpr&>(from_msg);
+  // @@protoc_insertion_point(class_specific_merge_from_start:greptime.v1.DropDatabaseExpr)
+  GOOGLE_DCHECK_NE(&from, _this);
+  uint32_t cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  if (!from._internal_catalog_name().empty()) {
+    _this->_internal_set_catalog_name(from._internal_catalog_name());
+  }
+  if (!from._internal_schema_name().empty()) {
+    _this->_internal_set_schema_name(from._internal_schema_name());
+  }
+  if (from._internal_drop_if_exists() != 0) {
+    _this->_internal_set_drop_if_exists(from._internal_drop_if_exists());
+  }
+  _this->_internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
+}
+
+void DropDatabaseExpr::CopyFrom(const DropDatabaseExpr& from) {
+// @@protoc_insertion_point(class_specific_copy_from_start:greptime.v1.DropDatabaseExpr)
+  if (&from == this) return;
+  Clear();
+  MergeFrom(from);
+}
+
+bool DropDatabaseExpr::IsInitialized() const {
+  return true;
+}
+
+void DropDatabaseExpr::InternalSwap(DropDatabaseExpr* 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_.catalog_name_, lhs_arena,
+      &other->_impl_.catalog_name_, rhs_arena
+  );
+  ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::InternalSwap(
+      &_impl_.schema_name_, lhs_arena,
+      &other->_impl_.schema_name_, rhs_arena
+  );
+  swap(_impl_.drop_if_exists_, other->_impl_.drop_if_exists_);
+}
+
+::PROTOBUF_NAMESPACE_ID::Metadata DropDatabaseExpr::GetMetadata() const {
+  return ::_pbi::AssignDescriptors(
+      &descriptor_table_greptime_2fv1_2fddl_2eproto_getter, &descriptor_table_greptime_2fv1_2fddl_2eproto_once,
+      file_level_metadata_greptime_2fv1_2fddl_2eproto[8]);
+}
+
+// ===================================================================
+
 class AddColumns::_Internal {
  public:
 };
@@ -3451,7 +3759,7 @@ void AddColumns::InternalSwap(AddColumns* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata AddColumns::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fddl_2eproto_getter, &descriptor_table_greptime_2fv1_2fddl_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fddl_2eproto[8]);
+      file_level_metadata_greptime_2fv1_2fddl_2eproto[9]);
 }
 
 // ===================================================================
@@ -3636,7 +3944,7 @@ void DropColumns::InternalSwap(DropColumns* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata DropColumns::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fddl_2eproto_getter, &descriptor_table_greptime_2fv1_2fddl_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fddl_2eproto[9]);
+      file_level_metadata_greptime_2fv1_2fddl_2eproto[10]);
 }
 
 // ===================================================================
@@ -3839,7 +4147,7 @@ void RenameTable::InternalSwap(RenameTable* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata RenameTable::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fddl_2eproto_getter, &descriptor_table_greptime_2fv1_2fddl_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fddl_2eproto[10]);
+      file_level_metadata_greptime_2fv1_2fddl_2eproto[11]);
 }
 
 // ===================================================================
@@ -4078,7 +4386,7 @@ void AddColumn::InternalSwap(AddColumn* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata AddColumn::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fddl_2eproto_getter, &descriptor_table_greptime_2fv1_2fddl_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fddl_2eproto[11]);
+      file_level_metadata_greptime_2fv1_2fddl_2eproto[12]);
 }
 
 // ===================================================================
@@ -4281,7 +4589,7 @@ void DropColumn::InternalSwap(DropColumn* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata DropColumn::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fddl_2eproto_getter, &descriptor_table_greptime_2fv1_2fddl_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fddl_2eproto[12]);
+      file_level_metadata_greptime_2fv1_2fddl_2eproto[13]);
 }
 
 // ===================================================================
@@ -4459,7 +4767,7 @@ void TableId::InternalSwap(TableId* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata TableId::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fddl_2eproto_getter, &descriptor_table_greptime_2fv1_2fddl_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fddl_2eproto[13]);
+      file_level_metadata_greptime_2fv1_2fddl_2eproto[14]);
 }
 
 // ===================================================================
@@ -4894,7 +5202,7 @@ void ColumnDef::InternalSwap(ColumnDef* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata ColumnDef::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fddl_2eproto_getter, &descriptor_table_greptime_2fv1_2fddl_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fddl_2eproto[14]);
+      file_level_metadata_greptime_2fv1_2fddl_2eproto[15]);
 }
 
 // ===================================================================
@@ -5127,7 +5435,7 @@ void AddColumnLocation::InternalSwap(AddColumnLocation* other) {
 ::PROTOBUF_NAMESPACE_ID::Metadata AddColumnLocation::GetMetadata() const {
   return ::_pbi::AssignDescriptors(
       &descriptor_table_greptime_2fv1_2fddl_2eproto_getter, &descriptor_table_greptime_2fv1_2fddl_2eproto_once,
-      file_level_metadata_greptime_2fv1_2fddl_2eproto[15]);
+      file_level_metadata_greptime_2fv1_2fddl_2eproto[16]);
 }
 
 // @@protoc_insertion_point(namespace_scope)
@@ -5166,6 +5474,10 @@ template<> PROTOBUF_NOINLINE ::greptime::v1::TruncateTableExpr*
 Arena::CreateMaybeMessage< ::greptime::v1::TruncateTableExpr >(Arena* arena) {
   return Arena::CreateMessageInternal< ::greptime::v1::TruncateTableExpr >(arena);
 }
+template<> PROTOBUF_NOINLINE ::greptime::v1::DropDatabaseExpr*
+Arena::CreateMaybeMessage< ::greptime::v1::DropDatabaseExpr >(Arena* arena) {
+  return Arena::CreateMessageInternal< ::greptime::v1::DropDatabaseExpr >(arena);
+}
 template<> PROTOBUF_NOINLINE ::greptime::v1::AddColumns*
 Arena::CreateMaybeMessage< ::greptime::v1::AddColumns >(Arena* arena) {
   return Arena::CreateMessageInternal< ::greptime::v1::AddColumns >(arena);

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

@@ -87,6 +87,9 @@ extern DropColumnDefaultTypeInternal _DropColumn_default_instance_;
 class DropColumns;
 struct DropColumnsDefaultTypeInternal;
 extern DropColumnsDefaultTypeInternal _DropColumns_default_instance_;
+class DropDatabaseExpr;
+struct DropDatabaseExprDefaultTypeInternal;
+extern DropDatabaseExprDefaultTypeInternal _DropDatabaseExpr_default_instance_;
 class DropTableExpr;
 struct DropTableExprDefaultTypeInternal;
 extern DropTableExprDefaultTypeInternal _DropTableExpr_default_instance_;
@@ -114,6 +117,7 @@ template<> ::greptime::v1::CreateTableExpr_TableOptionsEntry_DoNotUse* Arena::Cr
 template<> ::greptime::v1::DdlRequest* Arena::CreateMaybeMessage<::greptime::v1::DdlRequest>(Arena*);
 template<> ::greptime::v1::DropColumn* Arena::CreateMaybeMessage<::greptime::v1::DropColumn>(Arena*);
 template<> ::greptime::v1::DropColumns* Arena::CreateMaybeMessage<::greptime::v1::DropColumns>(Arena*);
+template<> ::greptime::v1::DropDatabaseExpr* Arena::CreateMaybeMessage<::greptime::v1::DropDatabaseExpr>(Arena*);
 template<> ::greptime::v1::DropTableExpr* Arena::CreateMaybeMessage<::greptime::v1::DropTableExpr>(Arena*);
 template<> ::greptime::v1::RenameTable* Arena::CreateMaybeMessage<::greptime::v1::RenameTable>(Arena*);
 template<> ::greptime::v1::TableId* Arena::CreateMaybeMessage<::greptime::v1::TableId>(Arena*);
@@ -1680,6 +1684,186 @@ class TruncateTableExpr final :
 };
 // -------------------------------------------------------------------
 
+class DropDatabaseExpr final :
+    public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:greptime.v1.DropDatabaseExpr) */ {
+ public:
+  inline DropDatabaseExpr() : DropDatabaseExpr(nullptr) {}
+  ~DropDatabaseExpr() override;
+  explicit PROTOBUF_CONSTEXPR DropDatabaseExpr(::PROTOBUF_NAMESPACE_ID::internal::ConstantInitialized);
+
+  DropDatabaseExpr(const DropDatabaseExpr& from);
+  DropDatabaseExpr(DropDatabaseExpr&& from) noexcept
+    : DropDatabaseExpr() {
+    *this = ::std::move(from);
+  }
+
+  inline DropDatabaseExpr& operator=(const DropDatabaseExpr& from) {
+    CopyFrom(from);
+    return *this;
+  }
+  inline DropDatabaseExpr& operator=(DropDatabaseExpr&& 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 DropDatabaseExpr& default_instance() {
+    return *internal_default_instance();
+  }
+  static inline const DropDatabaseExpr* internal_default_instance() {
+    return reinterpret_cast<const DropDatabaseExpr*>(
+               &_DropDatabaseExpr_default_instance_);
+  }
+  static constexpr int kIndexInFileMessages =
+    8;
+
+  friend void swap(DropDatabaseExpr& a, DropDatabaseExpr& b) {
+    a.Swap(&b);
+  }
+  inline void Swap(DropDatabaseExpr* 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(DropDatabaseExpr* other) {
+    if (other == this) return;
+    GOOGLE_DCHECK(GetOwningArena() == other->GetOwningArena());
+    InternalSwap(other);
+  }
+
+  // implements Message ----------------------------------------------
+
+  DropDatabaseExpr* New(::PROTOBUF_NAMESPACE_ID::Arena* arena = nullptr) const final {
+    return CreateMaybeMessage<DropDatabaseExpr>(arena);
+  }
+  using ::PROTOBUF_NAMESPACE_ID::Message::CopyFrom;
+  void CopyFrom(const DropDatabaseExpr& from);
+  using ::PROTOBUF_NAMESPACE_ID::Message::MergeFrom;
+  void MergeFrom( const DropDatabaseExpr& from) {
+    DropDatabaseExpr::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(DropDatabaseExpr* other);
+
+  private:
+  friend class ::PROTOBUF_NAMESPACE_ID::internal::AnyMetadata;
+  static ::PROTOBUF_NAMESPACE_ID::StringPiece FullMessageName() {
+    return "greptime.v1.DropDatabaseExpr";
+  }
+  protected:
+  explicit DropDatabaseExpr(::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 {
+    kCatalogNameFieldNumber = 1,
+    kSchemaNameFieldNumber = 2,
+    kDropIfExistsFieldNumber = 3,
+  };
+  // string catalog_name = 1;
+  void clear_catalog_name();
+  const std::string& catalog_name() const;
+  template <typename ArgT0 = const std::string&, typename... ArgT>
+  void set_catalog_name(ArgT0&& arg0, ArgT... args);
+  std::string* mutable_catalog_name();
+  PROTOBUF_NODISCARD std::string* release_catalog_name();
+  void set_allocated_catalog_name(std::string* catalog_name);
+  private:
+  const std::string& _internal_catalog_name() const;
+  inline PROTOBUF_ALWAYS_INLINE void _internal_set_catalog_name(const std::string& value);
+  std::string* _internal_mutable_catalog_name();
+  public:
+
+  // string schema_name = 2;
+  void clear_schema_name();
+  const std::string& schema_name() const;
+  template <typename ArgT0 = const std::string&, typename... ArgT>
+  void set_schema_name(ArgT0&& arg0, ArgT... args);
+  std::string* mutable_schema_name();
+  PROTOBUF_NODISCARD std::string* release_schema_name();
+  void set_allocated_schema_name(std::string* schema_name);
+  private:
+  const std::string& _internal_schema_name() const;
+  inline PROTOBUF_ALWAYS_INLINE void _internal_set_schema_name(const std::string& value);
+  std::string* _internal_mutable_schema_name();
+  public:
+
+  // bool drop_if_exists = 3;
+  void clear_drop_if_exists();
+  bool drop_if_exists() const;
+  void set_drop_if_exists(bool value);
+  private:
+  bool _internal_drop_if_exists() const;
+  void _internal_set_drop_if_exists(bool value);
+  public:
+
+  // @@protoc_insertion_point(class_scope:greptime.v1.DropDatabaseExpr)
+ 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 catalog_name_;
+    ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr schema_name_;
+    bool drop_if_exists_;
+    mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
+  };
+  union { Impl_ _impl_; };
+  friend struct ::TableStruct_greptime_2fv1_2fddl_2eproto;
+};
+// -------------------------------------------------------------------
+
 class AddColumns final :
     public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:greptime.v1.AddColumns) */ {
  public:
@@ -1728,7 +1912,7 @@ class AddColumns final :
                &_AddColumns_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    8;
+    9;
 
   friend void swap(AddColumns& a, AddColumns& b) {
     a.Swap(&b);
@@ -1885,7 +2069,7 @@ class DropColumns final :
                &_DropColumns_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    9;
+    10;
 
   friend void swap(DropColumns& a, DropColumns& b) {
     a.Swap(&b);
@@ -2042,7 +2226,7 @@ class RenameTable final :
                &_RenameTable_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    10;
+    11;
 
   friend void swap(RenameTable& a, RenameTable& b) {
     a.Swap(&b);
@@ -2195,7 +2379,7 @@ class AddColumn final :
                &_AddColumn_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    11;
+    12;
 
   friend void swap(AddColumn& a, AddColumn& b) {
     a.Swap(&b);
@@ -2372,7 +2556,7 @@ class DropColumn final :
                &_DropColumn_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    12;
+    13;
 
   friend void swap(DropColumn& a, DropColumn& b) {
     a.Swap(&b);
@@ -2525,7 +2709,7 @@ class TableId final :
                &_TableId_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    13;
+    14;
 
   friend void swap(TableId& a, TableId& b) {
     a.Swap(&b);
@@ -2673,7 +2857,7 @@ class ColumnDef final :
                &_ColumnDef_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    14;
+    15;
 
   friend void swap(ColumnDef& a, ColumnDef& b) {
     a.Swap(&b);
@@ -2911,7 +3095,7 @@ class AddColumnLocation final :
                &_AddColumnLocation_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    15;
+    16;
 
   friend void swap(AddColumnLocation& a, AddColumnLocation& b) {
     a.Swap(&b);
@@ -5005,6 +5189,130 @@ inline void TruncateTableExpr::set_allocated_table_id(::greptime::v1::TableId* t
 
 // -------------------------------------------------------------------
 
+// DropDatabaseExpr
+
+// string catalog_name = 1;
+inline void DropDatabaseExpr::clear_catalog_name() {
+  _impl_.catalog_name_.ClearToEmpty();
+}
+inline const std::string& DropDatabaseExpr::catalog_name() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.DropDatabaseExpr.catalog_name)
+  return _internal_catalog_name();
+}
+template <typename ArgT0, typename... ArgT>
+inline PROTOBUF_ALWAYS_INLINE
+void DropDatabaseExpr::set_catalog_name(ArgT0&& arg0, ArgT... args) {
+ 
+ _impl_.catalog_name_.Set(static_cast<ArgT0 &&>(arg0), args..., GetArenaForAllocation());
+  // @@protoc_insertion_point(field_set:greptime.v1.DropDatabaseExpr.catalog_name)
+}
+inline std::string* DropDatabaseExpr::mutable_catalog_name() {
+  std::string* _s = _internal_mutable_catalog_name();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.DropDatabaseExpr.catalog_name)
+  return _s;
+}
+inline const std::string& DropDatabaseExpr::_internal_catalog_name() const {
+  return _impl_.catalog_name_.Get();
+}
+inline void DropDatabaseExpr::_internal_set_catalog_name(const std::string& value) {
+  
+  _impl_.catalog_name_.Set(value, GetArenaForAllocation());
+}
+inline std::string* DropDatabaseExpr::_internal_mutable_catalog_name() {
+  
+  return _impl_.catalog_name_.Mutable(GetArenaForAllocation());
+}
+inline std::string* DropDatabaseExpr::release_catalog_name() {
+  // @@protoc_insertion_point(field_release:greptime.v1.DropDatabaseExpr.catalog_name)
+  return _impl_.catalog_name_.Release();
+}
+inline void DropDatabaseExpr::set_allocated_catalog_name(std::string* catalog_name) {
+  if (catalog_name != nullptr) {
+    
+  } else {
+    
+  }
+  _impl_.catalog_name_.SetAllocated(catalog_name, GetArenaForAllocation());
+#ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  if (_impl_.catalog_name_.IsDefault()) {
+    _impl_.catalog_name_.Set("", GetArenaForAllocation());
+  }
+#endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.DropDatabaseExpr.catalog_name)
+}
+
+// string schema_name = 2;
+inline void DropDatabaseExpr::clear_schema_name() {
+  _impl_.schema_name_.ClearToEmpty();
+}
+inline const std::string& DropDatabaseExpr::schema_name() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.DropDatabaseExpr.schema_name)
+  return _internal_schema_name();
+}
+template <typename ArgT0, typename... ArgT>
+inline PROTOBUF_ALWAYS_INLINE
+void DropDatabaseExpr::set_schema_name(ArgT0&& arg0, ArgT... args) {
+ 
+ _impl_.schema_name_.Set(static_cast<ArgT0 &&>(arg0), args..., GetArenaForAllocation());
+  // @@protoc_insertion_point(field_set:greptime.v1.DropDatabaseExpr.schema_name)
+}
+inline std::string* DropDatabaseExpr::mutable_schema_name() {
+  std::string* _s = _internal_mutable_schema_name();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.DropDatabaseExpr.schema_name)
+  return _s;
+}
+inline const std::string& DropDatabaseExpr::_internal_schema_name() const {
+  return _impl_.schema_name_.Get();
+}
+inline void DropDatabaseExpr::_internal_set_schema_name(const std::string& value) {
+  
+  _impl_.schema_name_.Set(value, GetArenaForAllocation());
+}
+inline std::string* DropDatabaseExpr::_internal_mutable_schema_name() {
+  
+  return _impl_.schema_name_.Mutable(GetArenaForAllocation());
+}
+inline std::string* DropDatabaseExpr::release_schema_name() {
+  // @@protoc_insertion_point(field_release:greptime.v1.DropDatabaseExpr.schema_name)
+  return _impl_.schema_name_.Release();
+}
+inline void DropDatabaseExpr::set_allocated_schema_name(std::string* schema_name) {
+  if (schema_name != nullptr) {
+    
+  } else {
+    
+  }
+  _impl_.schema_name_.SetAllocated(schema_name, GetArenaForAllocation());
+#ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  if (_impl_.schema_name_.IsDefault()) {
+    _impl_.schema_name_.Set("", GetArenaForAllocation());
+  }
+#endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.DropDatabaseExpr.schema_name)
+}
+
+// bool drop_if_exists = 3;
+inline void DropDatabaseExpr::clear_drop_if_exists() {
+  _impl_.drop_if_exists_ = false;
+}
+inline bool DropDatabaseExpr::_internal_drop_if_exists() const {
+  return _impl_.drop_if_exists_;
+}
+inline bool DropDatabaseExpr::drop_if_exists() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.DropDatabaseExpr.drop_if_exists)
+  return _internal_drop_if_exists();
+}
+inline void DropDatabaseExpr::_internal_set_drop_if_exists(bool value) {
+  
+  _impl_.drop_if_exists_ = value;
+}
+inline void DropDatabaseExpr::set_drop_if_exists(bool value) {
+  _internal_set_drop_if_exists(value);
+  // @@protoc_insertion_point(field_set:greptime.v1.DropDatabaseExpr.drop_if_exists)
+}
+
+// -------------------------------------------------------------------
+
 // AddColumns
 
 // repeated .greptime.v1.AddColumn add_columns = 1;
@@ -5813,6 +6121,8 @@ inline void AddColumnLocation::set_allocated_after_column_name(std::string* afte
 
 // -------------------------------------------------------------------
 
+// -------------------------------------------------------------------
+
 
 // @@protoc_insertion_point(namespace_scope)
 

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

@@ -116,6 +116,19 @@ struct TruncateTableTaskDefaultTypeInternal {
   };
 };
 PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 TruncateTableTaskDefaultTypeInternal _TruncateTableTask_default_instance_;
+PROTOBUF_CONSTEXPR DropDatabaseTask::DropDatabaseTask(
+    ::_pbi::ConstantInitialized): _impl_{
+    /*decltype(_impl_.drop_database_)*/nullptr
+  , /*decltype(_impl_._cached_size_)*/{}} {}
+struct DropDatabaseTaskDefaultTypeInternal {
+  PROTOBUF_CONSTEXPR DropDatabaseTaskDefaultTypeInternal()
+      : _instance(::_pbi::ConstantInitialized{}) {}
+  ~DropDatabaseTaskDefaultTypeInternal() {}
+  union {
+    DropDatabaseTask _instance;
+  };
+};
+PROTOBUF_ATTRIBUTE_NO_DESTROY PROTOBUF_CONSTINIT PROTOBUF_ATTRIBUTE_INIT_PRIORITY1 DropDatabaseTaskDefaultTypeInternal _DropDatabaseTask_default_instance_;
 PROTOBUF_CONSTEXPR DdlTaskRequest::DdlTaskRequest(
     ::_pbi::ConstantInitialized): _impl_{
     /*decltype(_impl_.header_)*/nullptr
@@ -150,7 +163,7 @@ 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[9];
+static ::_pb::Metadata file_level_metadata_greptime_2fv1_2fmeta_2fddl_2eproto[10];
 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;
 
@@ -207,6 +220,13 @@ const uint32_t TableStruct_greptime_2fv1_2fmeta_2fddl_2eproto::offsets[] PROTOBU
   ~0u,  // no _inlined_string_donated_
   PROTOBUF_FIELD_OFFSET(::greptime::v1::meta::TruncateTableTask, _impl_.truncate_table_),
   ~0u,  // no _has_bits_
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::meta::DropDatabaseTask, _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::DropDatabaseTask, _impl_.drop_database_),
+  ~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]),
@@ -220,6 +240,7 @@ const uint32_t TableStruct_greptime_2fv1_2fmeta_2fddl_2eproto::offsets[] PROTOBU
   ::_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_),
@@ -240,8 +261,9 @@ static const ::_pbi::MigrationSchema schemas[] PROTOBUF_SECTION_VARIABLE(protode
   { 30, -1, -1, sizeof(::greptime::v1::meta::AlterTableTask)},
   { 37, -1, -1, sizeof(::greptime::v1::meta::AlterTableTasks)},
   { 44, -1, -1, sizeof(::greptime::v1::meta::TruncateTableTask)},
-  { 51, -1, -1, sizeof(::greptime::v1::meta::DdlTaskRequest)},
+  { 51, -1, -1, sizeof(::greptime::v1::meta::DropDatabaseTask)},
-  { 66, -1, -1, sizeof(::greptime::v1::meta::DdlTaskResponse)},
+  { 58, -1, -1, sizeof(::greptime::v1::meta::DdlTaskRequest)},
+  { 74, -1, -1, sizeof(::greptime::v1::meta::DdlTaskResponse)},
 };
 
 static const ::_pb::Message* const file_default_instances[] = {
@@ -252,6 +274,7 @@ static const ::_pb::Message* const file_default_instances[] = {
   &::greptime::v1::meta::_AlterTableTask_default_instance_._instance,
   &::greptime::v1::meta::_AlterTableTasks_default_instance_._instance,
   &::greptime::v1::meta::_TruncateTableTask_default_instance_._instance,
+  &::greptime::v1::meta::_DropDatabaseTask_default_instance_._instance,
   &::greptime::v1::meta::_DdlTaskRequest_default_instance_._instance,
   &::greptime::v1::meta::_DdlTaskResponse_default_instance_._instance,
 };
@@ -274,27 +297,31 @@ const char descriptor_table_protodef_greptime_2fv1_2fmeta_2fddl_2eproto[] PROTOB
   "sks\030\001 \003(\0132 .greptime.v1.meta.AlterTableT"
   "ask\"K\n\021TruncateTableTask\0226\n\016truncate_tab"
   "le\030\001 \001(\0132\036.greptime.v1.TruncateTableExpr"
-  "\"\207\004\n\016DdlTaskRequest\022/\n\006header\030\001 \001(\0132\037.gr"
+  "\"H\n\020DropDatabaseTask\0224\n\rdrop_database\030\001 "
-  "eptime.v1.meta.RequestHeader\022>\n\021create_t"
+  "\001(\0132\035.greptime.v1.DropDatabaseExpr\"\311\004\n\016D"
-  "able_task\030\002 \001(\0132!.greptime.v1.meta.Creat"
+  "dlTaskRequest\022/\n\006header\030\001 \001(\0132\037.greptime"
-  "eTableTaskH\000\022:\n\017drop_table_task\030\003 \001(\0132\037."
+  ".v1.meta.RequestHeader\022>\n\021create_table_t"
-  "greptime.v1.meta.DropTableTaskH\000\022<\n\020alte"
+  "ask\030\002 \001(\0132!.greptime.v1.meta.CreateTable"
-  "r_table_task\030\004 \001(\0132 .greptime.v1.meta.Al"
+  "TaskH\000\022:\n\017drop_table_task\030\003 \001(\0132\037.grepti"
-  "terTableTaskH\000\022B\n\023truncate_table_task\030\005 "
+  "me.v1.meta.DropTableTaskH\000\022<\n\020alter_tabl"
-  "\001(\0132#.greptime.v1.meta.TruncateTableTask"
+  "e_task\030\004 \001(\0132 .greptime.v1.meta.AlterTab"
-  "H\000\022@\n\022create_table_tasks\030\006 \001(\0132\".greptim"
+  "leTaskH\000\022B\n\023truncate_table_task\030\005 \001(\0132#."
-  "e.v1.meta.CreateTableTasksH\000\022<\n\020drop_tab"
+  "greptime.v1.meta.TruncateTableTaskH\000\022@\n\022"
-  "le_tasks\030\007 \001(\0132 .greptime.v1.meta.DropTa"
+  "create_table_tasks\030\006 \001(\0132\".greptime.v1.m"
-  "bleTasksH\000\022>\n\021alter_table_tasks\030\010 \001(\0132!."
+  "eta.CreateTableTasksH\000\022<\n\020drop_table_tas"
-  "greptime.v1.meta.AlterTableTasksH\000B\006\n\004ta"
+  "ks\030\007 \001(\0132 .greptime.v1.meta.DropTableTas"
-  "sk\"\312\001\n\017DdlTaskResponse\0220\n\006header\030\001 \001(\0132 "
+  "ksH\000\022>\n\021alter_table_tasks\030\010 \001(\0132!.grepti"
-  ".greptime.v1.meta.ResponseHeader\022*\n\003pid\030"
+  "me.v1.meta.AlterTableTasksH\000\022@\n\022drop_dat"
-  "\002 \001(\0132\035.greptime.v1.meta.ProcedureId\022+\n\010"
+  "abase_task\030\t \001(\0132\".greptime.v1.meta.Drop"
-  "table_id\030\004 \001(\0132\031.greptime.v1.meta.TableI"
+  "DatabaseTaskH\000B\006\n\004task\"\312\001\n\017DdlTaskRespon"
-  "d\022,\n\ttable_ids\030\005 \003(\0132\031.greptime.v1.meta."
+  "se\0220\n\006header\030\001 \001(\0132 .greptime.v1.meta.Re"
-  "TableId*#\n\013DdlTaskType\022\n\n\006Create\020\000\022\010\n\004Dr"
+  "sponseHeader\022*\n\003pid\030\002 \001(\0132\035.greptime.v1."
-  "op\020\001B<Z:github.com/GreptimeTeam/greptime"
+  "meta.ProcedureId\022+\n\010table_id\030\004 \001(\0132\031.gre"
-  "-proto/go/greptime/v1/metab\006proto3"
+  "ptime.v1.meta.TableId\022,\n\ttable_ids\030\005 \003(\013"
+  "2\031.greptime.v1.meta.TableId*#\n\013DdlTaskTy"
+  "pe\022\n\n\006Create\020\000\022\010\n\004Drop\020\001B<Z:github.com/G"
+  "reptimeTeam/greptime-proto/go/greptime/v"
+  "1/metab\006proto3"
   ;
 static const ::_pbi::DescriptorTable* const descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_deps[3] = {
   &::descriptor_table_greptime_2fv1_2fddl_2eproto,
@@ -303,9 +330,9 @@ 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, 1514, descriptor_table_protodef_greptime_2fv1_2fmeta_2fddl_2eproto,
+    false, false, 1654, descriptor_table_protodef_greptime_2fv1_2fmeta_2fddl_2eproto,
     "greptime/v1/meta/ddl.proto",
-    &descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_once, descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_deps, 3, 9,
+    &descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_once, descriptor_table_greptime_2fv1_2fmeta_2fddl_2eproto_deps, 3, 10,
     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,
@@ -1771,6 +1798,205 @@ void TruncateTableTask::InternalSwap(TruncateTableTask* other) {
 
 // ===================================================================
 
+class DropDatabaseTask::_Internal {
+ public:
+  static const ::greptime::v1::DropDatabaseExpr& drop_database(const DropDatabaseTask* msg);
+};
+
+const ::greptime::v1::DropDatabaseExpr&
+DropDatabaseTask::_Internal::drop_database(const DropDatabaseTask* msg) {
+  return *msg->_impl_.drop_database_;
+}
+void DropDatabaseTask::clear_drop_database() {
+  if (GetArenaForAllocation() == nullptr && _impl_.drop_database_ != nullptr) {
+    delete _impl_.drop_database_;
+  }
+  _impl_.drop_database_ = nullptr;
+}
+DropDatabaseTask::DropDatabaseTask(::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.DropDatabaseTask)
+}
+DropDatabaseTask::DropDatabaseTask(const DropDatabaseTask& from)
+  : ::PROTOBUF_NAMESPACE_ID::Message() {
+  DropDatabaseTask* const _this = this; (void)_this;
+  new (&_impl_) Impl_{
+      decltype(_impl_.drop_database_){nullptr}
+    , /*decltype(_impl_._cached_size_)*/{}};
+
+  _internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
+  if (from._internal_has_drop_database()) {
+    _this->_impl_.drop_database_ = new ::greptime::v1::DropDatabaseExpr(*from._impl_.drop_database_);
+  }
+  // @@protoc_insertion_point(copy_constructor:greptime.v1.meta.DropDatabaseTask)
+}
+
+inline void DropDatabaseTask::SharedCtor(
+    ::_pb::Arena* arena, bool is_message_owned) {
+  (void)arena;
+  (void)is_message_owned;
+  new (&_impl_) Impl_{
+      decltype(_impl_.drop_database_){nullptr}
+    , /*decltype(_impl_._cached_size_)*/{}
+  };
+}
+
+DropDatabaseTask::~DropDatabaseTask() {
+  // @@protoc_insertion_point(destructor:greptime.v1.meta.DropDatabaseTask)
+  if (auto *arena = _internal_metadata_.DeleteReturnArena<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>()) {
+  (void)arena;
+    return;
+  }
+  SharedDtor();
+}
+
+inline void DropDatabaseTask::SharedDtor() {
+  GOOGLE_DCHECK(GetArenaForAllocation() == nullptr);
+  if (this != internal_default_instance()) delete _impl_.drop_database_;
+}
+
+void DropDatabaseTask::SetCachedSize(int size) const {
+  _impl_._cached_size_.Set(size);
+}
+
+void DropDatabaseTask::Clear() {
+// @@protoc_insertion_point(message_clear_start:greptime.v1.meta.DropDatabaseTask)
+  uint32_t cached_has_bits = 0;
+  // Prevent compiler warnings about cached_has_bits being unused
+  (void) cached_has_bits;
+
+  if (GetArenaForAllocation() == nullptr && _impl_.drop_database_ != nullptr) {
+    delete _impl_.drop_database_;
+  }
+  _impl_.drop_database_ = nullptr;
+  _internal_metadata_.Clear<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>();
+}
+
+const char* DropDatabaseTask::_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.DropDatabaseExpr drop_database = 1;
+      case 1:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 10)) {
+          ptr = ctx->ParseMessage(_internal_mutable_drop_database(), 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* DropDatabaseTask::_InternalSerialize(
+    uint8_t* target, ::PROTOBUF_NAMESPACE_ID::io::EpsCopyOutputStream* stream) const {
+  // @@protoc_insertion_point(serialize_to_array_start:greptime.v1.meta.DropDatabaseTask)
+  uint32_t cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  // .greptime.v1.DropDatabaseExpr drop_database = 1;
+  if (this->_internal_has_drop_database()) {
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::
+      InternalWriteMessage(1, _Internal::drop_database(this),
+        _Internal::drop_database(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.DropDatabaseTask)
+  return target;
+}
+
+size_t DropDatabaseTask::ByteSizeLong() const {
+// @@protoc_insertion_point(message_byte_size_start:greptime.v1.meta.DropDatabaseTask)
+  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.DropDatabaseExpr drop_database = 1;
+  if (this->_internal_has_drop_database()) {
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::MessageSize(
+        *_impl_.drop_database_);
+  }
+
+  return MaybeComputeUnknownFieldsSize(total_size, &_impl_._cached_size_);
+}
+
+const ::PROTOBUF_NAMESPACE_ID::Message::ClassData DropDatabaseTask::_class_data_ = {
+    ::PROTOBUF_NAMESPACE_ID::Message::CopyWithSourceCheck,
+    DropDatabaseTask::MergeImpl
+};
+const ::PROTOBUF_NAMESPACE_ID::Message::ClassData*DropDatabaseTask::GetClassData() const { return &_class_data_; }
+
+
+void DropDatabaseTask::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::PROTOBUF_NAMESPACE_ID::Message& from_msg) {
+  auto* const _this = static_cast<DropDatabaseTask*>(&to_msg);
+  auto& from = static_cast<const DropDatabaseTask&>(from_msg);
+  // @@protoc_insertion_point(class_specific_merge_from_start:greptime.v1.meta.DropDatabaseTask)
+  GOOGLE_DCHECK_NE(&from, _this);
+  uint32_t cached_has_bits = 0;
+  (void) cached_has_bits;
+
+  if (from._internal_has_drop_database()) {
+    _this->_internal_mutable_drop_database()->::greptime::v1::DropDatabaseExpr::MergeFrom(
+        from._internal_drop_database());
+  }
+  _this->_internal_metadata_.MergeFrom<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(from._internal_metadata_);
+}
+
+void DropDatabaseTask::CopyFrom(const DropDatabaseTask& from) {
+// @@protoc_insertion_point(class_specific_copy_from_start:greptime.v1.meta.DropDatabaseTask)
+  if (&from == this) return;
+  Clear();
+  MergeFrom(from);
+}
+
+bool DropDatabaseTask::IsInitialized() const {
+  return true;
+}
+
+void DropDatabaseTask::InternalSwap(DropDatabaseTask* other) {
+  using std::swap;
+  _internal_metadata_.InternalSwap(&other->_internal_metadata_);
+  swap(_impl_.drop_database_, other->_impl_.drop_database_);
+}
+
+::PROTOBUF_NAMESPACE_ID::Metadata DropDatabaseTask::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[7]);
+}
+
+// ===================================================================
+
 class DdlTaskRequest::_Internal {
  public:
   static const ::greptime::v1::meta::RequestHeader& header(const DdlTaskRequest* msg);
@@ -1781,6 +2007,7 @@ class DdlTaskRequest::_Internal {
   static const ::greptime::v1::meta::CreateTableTasks& create_table_tasks(const DdlTaskRequest* msg);
   static const ::greptime::v1::meta::DropTableTasks& drop_table_tasks(const DdlTaskRequest* msg);
   static const ::greptime::v1::meta::AlterTableTasks& alter_table_tasks(const DdlTaskRequest* msg);
+  static const ::greptime::v1::meta::DropDatabaseTask& drop_database_task(const DdlTaskRequest* msg);
 };
 
 const ::greptime::v1::meta::RequestHeader&
@@ -1815,6 +2042,10 @@ const ::greptime::v1::meta::AlterTableTasks&
 DdlTaskRequest::_Internal::alter_table_tasks(const DdlTaskRequest* msg) {
   return *msg->_impl_.task_.alter_table_tasks_;
 }
+const ::greptime::v1::meta::DropDatabaseTask&
+DdlTaskRequest::_Internal::drop_database_task(const DdlTaskRequest* msg) {
+  return *msg->_impl_.task_.drop_database_task_;
+}
 void DdlTaskRequest::clear_header() {
   if (GetArenaForAllocation() == nullptr && _impl_.header_ != nullptr) {
     delete _impl_.header_;
@@ -1926,6 +2157,21 @@ void DdlTaskRequest::set_allocated_alter_table_tasks(::greptime::v1::meta::Alter
   }
   // @@protoc_insertion_point(field_set_allocated:greptime.v1.meta.DdlTaskRequest.alter_table_tasks)
 }
+void DdlTaskRequest::set_allocated_drop_database_task(::greptime::v1::meta::DropDatabaseTask* drop_database_task) {
+  ::PROTOBUF_NAMESPACE_ID::Arena* message_arena = GetArenaForAllocation();
+  clear_task();
+  if (drop_database_task) {
+    ::PROTOBUF_NAMESPACE_ID::Arena* submessage_arena =
+      ::PROTOBUF_NAMESPACE_ID::Arena::InternalGetOwningArena(drop_database_task);
+    if (message_arena != submessage_arena) {
+      drop_database_task = ::PROTOBUF_NAMESPACE_ID::internal::GetOwnedMessage(
+          message_arena, drop_database_task, submessage_arena);
+    }
+    set_has_drop_database_task();
+    _impl_.task_.drop_database_task_ = drop_database_task;
+  }
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.meta.DdlTaskRequest.drop_database_task)
+}
 DdlTaskRequest::DdlTaskRequest(::PROTOBUF_NAMESPACE_ID::Arena* arena,
                          bool is_message_owned)
   : ::PROTOBUF_NAMESPACE_ID::Message(arena, is_message_owned) {
@@ -1982,6 +2228,11 @@ DdlTaskRequest::DdlTaskRequest(const DdlTaskRequest& from)
           from._internal_alter_table_tasks());
       break;
     }
+    case kDropDatabaseTask: {
+      _this->_internal_mutable_drop_database_task()->::greptime::v1::meta::DropDatabaseTask::MergeFrom(
+          from._internal_drop_database_task());
+      break;
+    }
     case TASK_NOT_SET: {
       break;
     }
@@ -2068,6 +2319,12 @@ void DdlTaskRequest::clear_task() {
       }
       break;
     }
+    case kDropDatabaseTask: {
+      if (GetArenaForAllocation() == nullptr) {
+        delete _impl_.task_.drop_database_task_;
+      }
+      break;
+    }
     case TASK_NOT_SET: {
       break;
     }
@@ -2160,6 +2417,14 @@ const char* DdlTaskRequest::_InternalParse(const char* ptr, ::_pbi::ParseContext
         } else
           goto handle_unusual;
         continue;
+      // .greptime.v1.meta.DropDatabaseTask drop_database_task = 9;
+      case 9:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 74)) {
+          ptr = ctx->ParseMessage(_internal_mutable_drop_database_task(), ptr);
+          CHK_(ptr);
+        } else
+          goto handle_unusual;
+        continue;
       default:
         goto handle_unusual;
     }  // switch
@@ -2245,6 +2510,13 @@ uint8_t* DdlTaskRequest::_InternalSerialize(
         _Internal::alter_table_tasks(this).GetCachedSize(), target, stream);
   }
 
+  // .greptime.v1.meta.DropDatabaseTask drop_database_task = 9;
+  if (_internal_has_drop_database_task()) {
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::
+      InternalWriteMessage(9, _Internal::drop_database_task(this),
+        _Internal::drop_database_task(this).GetCachedSize(), target, stream);
+  }
+
   if (PROTOBUF_PREDICT_FALSE(_internal_metadata_.have_unknown_fields())) {
     target = ::_pbi::WireFormat::InternalSerializeUnknownFieldsToArray(
         _internal_metadata_.unknown_fields<::PROTOBUF_NAMESPACE_ID::UnknownFieldSet>(::PROTOBUF_NAMESPACE_ID::UnknownFieldSet::default_instance), target, stream);
@@ -2318,6 +2590,13 @@ size_t DdlTaskRequest::ByteSizeLong() const {
           *_impl_.task_.alter_table_tasks_);
       break;
     }
+    // .greptime.v1.meta.DropDatabaseTask drop_database_task = 9;
+    case kDropDatabaseTask: {
+      total_size += 1 +
+        ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::MessageSize(
+          *_impl_.task_.drop_database_task_);
+      break;
+    }
     case TASK_NOT_SET: {
       break;
     }
@@ -2380,6 +2659,11 @@ void DdlTaskRequest::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const :
           from._internal_alter_table_tasks());
       break;
     }
+    case kDropDatabaseTask: {
+      _this->_internal_mutable_drop_database_task()->::greptime::v1::meta::DropDatabaseTask::MergeFrom(
+          from._internal_drop_database_task());
+      break;
+    }
     case TASK_NOT_SET: {
       break;
     }
@@ -2409,7 +2693,7 @@ 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[7]);
+      file_level_metadata_greptime_2fv1_2fmeta_2fddl_2eproto[8]);
 }
 
 // ===================================================================
@@ -2744,7 +3028,7 @@ 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[8]);
+      file_level_metadata_greptime_2fv1_2fmeta_2fddl_2eproto[9]);
 }
 
 // @@protoc_insertion_point(namespace_scope)
@@ -2780,6 +3064,10 @@ template<> PROTOBUF_NOINLINE ::greptime::v1::meta::TruncateTableTask*
 Arena::CreateMaybeMessage< ::greptime::v1::meta::TruncateTableTask >(Arena* arena) {
   return Arena::CreateMessageInternal< ::greptime::v1::meta::TruncateTableTask >(arena);
 }
+template<> PROTOBUF_NOINLINE ::greptime::v1::meta::DropDatabaseTask*
+Arena::CreateMaybeMessage< ::greptime::v1::meta::DropDatabaseTask >(Arena* arena) {
+  return Arena::CreateMessageInternal< ::greptime::v1::meta::DropDatabaseTask >(arena);
+}
 template<> PROTOBUF_NOINLINE ::greptime::v1::meta::DdlTaskRequest*
 Arena::CreateMaybeMessage< ::greptime::v1::meta::DdlTaskRequest >(Arena* arena) {
   return Arena::CreateMessageInternal< ::greptime::v1::meta::DdlTaskRequest >(arena);

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

@@ -69,6 +69,9 @@ extern DdlTaskRequestDefaultTypeInternal _DdlTaskRequest_default_instance_;
 class DdlTaskResponse;
 struct DdlTaskResponseDefaultTypeInternal;
 extern DdlTaskResponseDefaultTypeInternal _DdlTaskResponse_default_instance_;
+class DropDatabaseTask;
+struct DropDatabaseTaskDefaultTypeInternal;
+extern DropDatabaseTaskDefaultTypeInternal _DropDatabaseTask_default_instance_;
 class DropTableTask;
 struct DropTableTaskDefaultTypeInternal;
 extern DropTableTaskDefaultTypeInternal _DropTableTask_default_instance_;
@@ -88,6 +91,7 @@ template<> ::greptime::v1::meta::CreateTableTask* Arena::CreateMaybeMessage<::gr
 template<> ::greptime::v1::meta::CreateTableTasks* Arena::CreateMaybeMessage<::greptime::v1::meta::CreateTableTasks>(Arena*);
 template<> ::greptime::v1::meta::DdlTaskRequest* Arena::CreateMaybeMessage<::greptime::v1::meta::DdlTaskRequest>(Arena*);
 template<> ::greptime::v1::meta::DdlTaskResponse* Arena::CreateMaybeMessage<::greptime::v1::meta::DdlTaskResponse>(Arena*);
+template<> ::greptime::v1::meta::DropDatabaseTask* Arena::CreateMaybeMessage<::greptime::v1::meta::DropDatabaseTask>(Arena*);
 template<> ::greptime::v1::meta::DropTableTask* Arena::CreateMaybeMessage<::greptime::v1::meta::DropTableTask>(Arena*);
 template<> ::greptime::v1::meta::DropTableTasks* Arena::CreateMaybeMessage<::greptime::v1::meta::DropTableTasks>(Arena*);
 template<> ::greptime::v1::meta::TruncateTableTask* Arena::CreateMaybeMessage<::greptime::v1::meta::TruncateTableTask>(Arena*);
@@ -1258,6 +1262,163 @@ class TruncateTableTask final :
 };
 // -------------------------------------------------------------------
 
+class DropDatabaseTask final :
+    public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:greptime.v1.meta.DropDatabaseTask) */ {
+ public:
+  inline DropDatabaseTask() : DropDatabaseTask(nullptr) {}
+  ~DropDatabaseTask() override;
+  explicit PROTOBUF_CONSTEXPR DropDatabaseTask(::PROTOBUF_NAMESPACE_ID::internal::ConstantInitialized);
+
+  DropDatabaseTask(const DropDatabaseTask& from);
+  DropDatabaseTask(DropDatabaseTask&& from) noexcept
+    : DropDatabaseTask() {
+    *this = ::std::move(from);
+  }
+
+  inline DropDatabaseTask& operator=(const DropDatabaseTask& from) {
+    CopyFrom(from);
+    return *this;
+  }
+  inline DropDatabaseTask& operator=(DropDatabaseTask&& 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 DropDatabaseTask& default_instance() {
+    return *internal_default_instance();
+  }
+  static inline const DropDatabaseTask* internal_default_instance() {
+    return reinterpret_cast<const DropDatabaseTask*>(
+               &_DropDatabaseTask_default_instance_);
+  }
+  static constexpr int kIndexInFileMessages =
+    7;
+
+  friend void swap(DropDatabaseTask& a, DropDatabaseTask& b) {
+    a.Swap(&b);
+  }
+  inline void Swap(DropDatabaseTask* 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(DropDatabaseTask* other) {
+    if (other == this) return;
+    GOOGLE_DCHECK(GetOwningArena() == other->GetOwningArena());
+    InternalSwap(other);
+  }
+
+  // implements Message ----------------------------------------------
+
+  DropDatabaseTask* New(::PROTOBUF_NAMESPACE_ID::Arena* arena = nullptr) const final {
+    return CreateMaybeMessage<DropDatabaseTask>(arena);
+  }
+  using ::PROTOBUF_NAMESPACE_ID::Message::CopyFrom;
+  void CopyFrom(const DropDatabaseTask& from);
+  using ::PROTOBUF_NAMESPACE_ID::Message::MergeFrom;
+  void MergeFrom( const DropDatabaseTask& from) {
+    DropDatabaseTask::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(DropDatabaseTask* other);
+
+  private:
+  friend class ::PROTOBUF_NAMESPACE_ID::internal::AnyMetadata;
+  static ::PROTOBUF_NAMESPACE_ID::StringPiece FullMessageName() {
+    return "greptime.v1.meta.DropDatabaseTask";
+  }
+  protected:
+  explicit DropDatabaseTask(::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 {
+    kDropDatabaseFieldNumber = 1,
+  };
+  // .greptime.v1.DropDatabaseExpr drop_database = 1;
+  bool has_drop_database() const;
+  private:
+  bool _internal_has_drop_database() const;
+  public:
+  void clear_drop_database();
+  const ::greptime::v1::DropDatabaseExpr& drop_database() const;
+  PROTOBUF_NODISCARD ::greptime::v1::DropDatabaseExpr* release_drop_database();
+  ::greptime::v1::DropDatabaseExpr* mutable_drop_database();
+  void set_allocated_drop_database(::greptime::v1::DropDatabaseExpr* drop_database);
+  private:
+  const ::greptime::v1::DropDatabaseExpr& _internal_drop_database() const;
+  ::greptime::v1::DropDatabaseExpr* _internal_mutable_drop_database();
+  public:
+  void unsafe_arena_set_allocated_drop_database(
+      ::greptime::v1::DropDatabaseExpr* drop_database);
+  ::greptime::v1::DropDatabaseExpr* unsafe_arena_release_drop_database();
+
+  // @@protoc_insertion_point(class_scope:greptime.v1.meta.DropDatabaseTask)
+ private:
+  class _Internal;
+
+  template <typename T> friend class ::PROTOBUF_NAMESPACE_ID::Arena::InternalHelper;
+  typedef void InternalArenaConstructable_;
+  typedef void DestructorSkippable_;
+  struct Impl_ {
+    ::greptime::v1::DropDatabaseExpr* drop_database_;
+    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:
@@ -1309,6 +1470,7 @@ class DdlTaskRequest final :
     kCreateTableTasks = 6,
     kDropTableTasks = 7,
     kAlterTableTasks = 8,
+    kDropDatabaseTask = 9,
     TASK_NOT_SET = 0,
   };
 
@@ -1317,7 +1479,7 @@ class DdlTaskRequest final :
                &_DdlTaskRequest_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    7;
+    8;
 
   friend void swap(DdlTaskRequest& a, DdlTaskRequest& b) {
     a.Swap(&b);
@@ -1398,6 +1560,7 @@ class DdlTaskRequest final :
     kCreateTableTasksFieldNumber = 6,
     kDropTableTasksFieldNumber = 7,
     kAlterTableTasksFieldNumber = 8,
+    kDropDatabaseTaskFieldNumber = 9,
   };
   // .greptime.v1.meta.RequestHeader header = 1;
   bool has_header() const;
@@ -1543,6 +1706,24 @@ class DdlTaskRequest final :
       ::greptime::v1::meta::AlterTableTasks* alter_table_tasks);
   ::greptime::v1::meta::AlterTableTasks* unsafe_arena_release_alter_table_tasks();
 
+  // .greptime.v1.meta.DropDatabaseTask drop_database_task = 9;
+  bool has_drop_database_task() const;
+  private:
+  bool _internal_has_drop_database_task() const;
+  public:
+  void clear_drop_database_task();
+  const ::greptime::v1::meta::DropDatabaseTask& drop_database_task() const;
+  PROTOBUF_NODISCARD ::greptime::v1::meta::DropDatabaseTask* release_drop_database_task();
+  ::greptime::v1::meta::DropDatabaseTask* mutable_drop_database_task();
+  void set_allocated_drop_database_task(::greptime::v1::meta::DropDatabaseTask* drop_database_task);
+  private:
+  const ::greptime::v1::meta::DropDatabaseTask& _internal_drop_database_task() const;
+  ::greptime::v1::meta::DropDatabaseTask* _internal_mutable_drop_database_task();
+  public:
+  void unsafe_arena_set_allocated_drop_database_task(
+      ::greptime::v1::meta::DropDatabaseTask* drop_database_task);
+  ::greptime::v1::meta::DropDatabaseTask* unsafe_arena_release_drop_database_task();
+
   void clear_task();
   TaskCase task_case() const;
   // @@protoc_insertion_point(class_scope:greptime.v1.meta.DdlTaskRequest)
@@ -1555,6 +1736,7 @@ class DdlTaskRequest final :
   void set_has_create_table_tasks();
   void set_has_drop_table_tasks();
   void set_has_alter_table_tasks();
+  void set_has_drop_database_task();
 
   inline bool has_task() const;
   inline void clear_has_task();
@@ -1574,6 +1756,7 @@ class DdlTaskRequest final :
       ::greptime::v1::meta::CreateTableTasks* create_table_tasks_;
       ::greptime::v1::meta::DropTableTasks* drop_table_tasks_;
       ::greptime::v1::meta::AlterTableTasks* alter_table_tasks_;
+      ::greptime::v1::meta::DropDatabaseTask* drop_database_task_;
     } task_;
     mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
     uint32_t _oneof_case_[1];
@@ -1632,7 +1815,7 @@ class DdlTaskResponse final :
                &_DdlTaskResponse_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    8;
+    9;
 
   friend void swap(DdlTaskResponse& a, DdlTaskResponse& b) {
     a.Swap(&b);
@@ -2383,6 +2566,95 @@ inline void TruncateTableTask::set_allocated_truncate_table(::greptime::v1::Trun
 
 // -------------------------------------------------------------------
 
+// DropDatabaseTask
+
+// .greptime.v1.DropDatabaseExpr drop_database = 1;
+inline bool DropDatabaseTask::_internal_has_drop_database() const {
+  return this != internal_default_instance() && _impl_.drop_database_ != nullptr;
+}
+inline bool DropDatabaseTask::has_drop_database() const {
+  return _internal_has_drop_database();
+}
+inline const ::greptime::v1::DropDatabaseExpr& DropDatabaseTask::_internal_drop_database() const {
+  const ::greptime::v1::DropDatabaseExpr* p = _impl_.drop_database_;
+  return p != nullptr ? *p : reinterpret_cast<const ::greptime::v1::DropDatabaseExpr&>(
+      ::greptime::v1::_DropDatabaseExpr_default_instance_);
+}
+inline const ::greptime::v1::DropDatabaseExpr& DropDatabaseTask::drop_database() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.meta.DropDatabaseTask.drop_database)
+  return _internal_drop_database();
+}
+inline void DropDatabaseTask::unsafe_arena_set_allocated_drop_database(
+    ::greptime::v1::DropDatabaseExpr* drop_database) {
+  if (GetArenaForAllocation() == nullptr) {
+    delete reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(_impl_.drop_database_);
+  }
+  _impl_.drop_database_ = drop_database;
+  if (drop_database) {
+    
+  } else {
+    
+  }
+  // @@protoc_insertion_point(field_unsafe_arena_set_allocated:greptime.v1.meta.DropDatabaseTask.drop_database)
+}
+inline ::greptime::v1::DropDatabaseExpr* DropDatabaseTask::release_drop_database() {
+  
+  ::greptime::v1::DropDatabaseExpr* temp = _impl_.drop_database_;
+  _impl_.drop_database_ = 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::DropDatabaseExpr* DropDatabaseTask::unsafe_arena_release_drop_database() {
+  // @@protoc_insertion_point(field_release:greptime.v1.meta.DropDatabaseTask.drop_database)
+  
+  ::greptime::v1::DropDatabaseExpr* temp = _impl_.drop_database_;
+  _impl_.drop_database_ = nullptr;
+  return temp;
+}
+inline ::greptime::v1::DropDatabaseExpr* DropDatabaseTask::_internal_mutable_drop_database() {
+  
+  if (_impl_.drop_database_ == nullptr) {
+    auto* p = CreateMaybeMessage<::greptime::v1::DropDatabaseExpr>(GetArenaForAllocation());
+    _impl_.drop_database_ = p;
+  }
+  return _impl_.drop_database_;
+}
+inline ::greptime::v1::DropDatabaseExpr* DropDatabaseTask::mutable_drop_database() {
+  ::greptime::v1::DropDatabaseExpr* _msg = _internal_mutable_drop_database();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.meta.DropDatabaseTask.drop_database)
+  return _msg;
+}
+inline void DropDatabaseTask::set_allocated_drop_database(::greptime::v1::DropDatabaseExpr* drop_database) {
+  ::PROTOBUF_NAMESPACE_ID::Arena* message_arena = GetArenaForAllocation();
+  if (message_arena == nullptr) {
+    delete reinterpret_cast< ::PROTOBUF_NAMESPACE_ID::MessageLite*>(_impl_.drop_database_);
+  }
+  if (drop_database) {
+    ::PROTOBUF_NAMESPACE_ID::Arena* submessage_arena =
+        ::PROTOBUF_NAMESPACE_ID::Arena::InternalGetOwningArena(
+                reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(drop_database));
+    if (message_arena != submessage_arena) {
+      drop_database = ::PROTOBUF_NAMESPACE_ID::internal::GetOwnedMessage(
+          message_arena, drop_database, submessage_arena);
+    }
+    
+  } else {
+    
+  }
+  _impl_.drop_database_ = drop_database;
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.meta.DropDatabaseTask.drop_database)
+}
+
+// -------------------------------------------------------------------
+
 // DdlTaskRequest
 
 // .greptime.v1.meta.RequestHeader header = 1;
@@ -2988,6 +3260,80 @@ inline ::greptime::v1::meta::AlterTableTasks* DdlTaskRequest::mutable_alter_tabl
   return _msg;
 }
 
+// .greptime.v1.meta.DropDatabaseTask drop_database_task = 9;
+inline bool DdlTaskRequest::_internal_has_drop_database_task() const {
+  return task_case() == kDropDatabaseTask;
+}
+inline bool DdlTaskRequest::has_drop_database_task() const {
+  return _internal_has_drop_database_task();
+}
+inline void DdlTaskRequest::set_has_drop_database_task() {
+  _impl_._oneof_case_[0] = kDropDatabaseTask;
+}
+inline void DdlTaskRequest::clear_drop_database_task() {
+  if (_internal_has_drop_database_task()) {
+    if (GetArenaForAllocation() == nullptr) {
+      delete _impl_.task_.drop_database_task_;
+    }
+    clear_has_task();
+  }
+}
+inline ::greptime::v1::meta::DropDatabaseTask* DdlTaskRequest::release_drop_database_task() {
+  // @@protoc_insertion_point(field_release:greptime.v1.meta.DdlTaskRequest.drop_database_task)
+  if (_internal_has_drop_database_task()) {
+    clear_has_task();
+    ::greptime::v1::meta::DropDatabaseTask* temp = _impl_.task_.drop_database_task_;
+    if (GetArenaForAllocation() != nullptr) {
+      temp = ::PROTOBUF_NAMESPACE_ID::internal::DuplicateIfNonNull(temp);
+    }
+    _impl_.task_.drop_database_task_ = nullptr;
+    return temp;
+  } else {
+    return nullptr;
+  }
+}
+inline const ::greptime::v1::meta::DropDatabaseTask& DdlTaskRequest::_internal_drop_database_task() const {
+  return _internal_has_drop_database_task()
+      ? *_impl_.task_.drop_database_task_
+      : reinterpret_cast< ::greptime::v1::meta::DropDatabaseTask&>(::greptime::v1::meta::_DropDatabaseTask_default_instance_);
+}
+inline const ::greptime::v1::meta::DropDatabaseTask& DdlTaskRequest::drop_database_task() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.meta.DdlTaskRequest.drop_database_task)
+  return _internal_drop_database_task();
+}
+inline ::greptime::v1::meta::DropDatabaseTask* DdlTaskRequest::unsafe_arena_release_drop_database_task() {
+  // @@protoc_insertion_point(field_unsafe_arena_release:greptime.v1.meta.DdlTaskRequest.drop_database_task)
+  if (_internal_has_drop_database_task()) {
+    clear_has_task();
+    ::greptime::v1::meta::DropDatabaseTask* temp = _impl_.task_.drop_database_task_;
+    _impl_.task_.drop_database_task_ = nullptr;
+    return temp;
+  } else {
+    return nullptr;
+  }
+}
+inline void DdlTaskRequest::unsafe_arena_set_allocated_drop_database_task(::greptime::v1::meta::DropDatabaseTask* drop_database_task) {
+  clear_task();
+  if (drop_database_task) {
+    set_has_drop_database_task();
+    _impl_.task_.drop_database_task_ = drop_database_task;
+  }
+  // @@protoc_insertion_point(field_unsafe_arena_set_allocated:greptime.v1.meta.DdlTaskRequest.drop_database_task)
+}
+inline ::greptime::v1::meta::DropDatabaseTask* DdlTaskRequest::_internal_mutable_drop_database_task() {
+  if (!_internal_has_drop_database_task()) {
+    clear_task();
+    set_has_drop_database_task();
+    _impl_.task_.drop_database_task_ = CreateMaybeMessage< ::greptime::v1::meta::DropDatabaseTask >(GetArenaForAllocation());
+  }
+  return _impl_.task_.drop_database_task_;
+}
+inline ::greptime::v1::meta::DropDatabaseTask* DdlTaskRequest::mutable_drop_database_task() {
+  ::greptime::v1::meta::DropDatabaseTask* _msg = _internal_mutable_drop_database_task();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.meta.DdlTaskRequest.drop_database_task)
+  return _msg;
+}
+
 inline bool DdlTaskRequest::has_task() const {
   return task_case() != TASK_NOT_SET;
 }
@@ -3312,6 +3658,8 @@ DdlTaskResponse::table_ids() const {
 
 // -------------------------------------------------------------------
 
+// -------------------------------------------------------------------
+
 
 // @@protoc_insertion_point(namespace_scope)
 

go/greptime/v1/ddl.pb.go

@@ -77,7 +77,7 @@ func (x AddColumnLocation_LocationType) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use AddColumnLocation_LocationType.Descriptor instead.
 func (AddColumnLocation_LocationType) EnumDescriptor() ([]byte, []int) {
-	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{13, 0}
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{14, 0}
 }
 
 // "Data Definition Language" requests, that create, modify or delete the
@@ -666,6 +666,69 @@ func (x *TruncateTableExpr) GetTableId() *TableId {
 	return nil
 }
 
+type DropDatabaseExpr struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	CatalogName  string `protobuf:"bytes,1,opt,name=catalog_name,json=catalogName,proto3" json:"catalog_name,omitempty"`
+	SchemaName   string `protobuf:"bytes,2,opt,name=schema_name,json=schemaName,proto3" json:"schema_name,omitempty"`
+	DropIfExists bool   `protobuf:"varint,3,opt,name=drop_if_exists,json=dropIfExists,proto3" json:"drop_if_exists,omitempty"`
+}
+
+func (x *DropDatabaseExpr) Reset() {
+	*x = DropDatabaseExpr{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_greptime_v1_ddl_proto_msgTypes[6]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *DropDatabaseExpr) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*DropDatabaseExpr) ProtoMessage() {}
+
+func (x *DropDatabaseExpr) ProtoReflect() protoreflect.Message {
+	mi := &file_greptime_v1_ddl_proto_msgTypes[6]
+	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 DropDatabaseExpr.ProtoReflect.Descriptor instead.
+func (*DropDatabaseExpr) Descriptor() ([]byte, []int) {
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{6}
+}
+
+func (x *DropDatabaseExpr) GetCatalogName() string {
+	if x != nil {
+		return x.CatalogName
+	}
+	return ""
+}
+
+func (x *DropDatabaseExpr) GetSchemaName() string {
+	if x != nil {
+		return x.SchemaName
+	}
+	return ""
+}
+
+func (x *DropDatabaseExpr) GetDropIfExists() bool {
+	if x != nil {
+		return x.DropIfExists
+	}
+	return false
+}
+
 type AddColumns struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -677,7 +740,7 @@ type AddColumns struct {
 func (x *AddColumns) Reset() {
 	*x = AddColumns{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_ddl_proto_msgTypes[6]
+		mi := &file_greptime_v1_ddl_proto_msgTypes[7]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -690,7 +753,7 @@ func (x *AddColumns) String() string {
 func (*AddColumns) ProtoMessage() {}
 
 func (x *AddColumns) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_ddl_proto_msgTypes[6]
+	mi := &file_greptime_v1_ddl_proto_msgTypes[7]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -703,7 +766,7 @@ func (x *AddColumns) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use AddColumns.ProtoReflect.Descriptor instead.
 func (*AddColumns) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{6}
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{7}
 }
 
 func (x *AddColumns) GetAddColumns() []*AddColumn {
@@ -724,7 +787,7 @@ type DropColumns struct {
 func (x *DropColumns) Reset() {
 	*x = DropColumns{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_ddl_proto_msgTypes[7]
+		mi := &file_greptime_v1_ddl_proto_msgTypes[8]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -737,7 +800,7 @@ func (x *DropColumns) String() string {
 func (*DropColumns) ProtoMessage() {}
 
 func (x *DropColumns) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_ddl_proto_msgTypes[7]
+	mi := &file_greptime_v1_ddl_proto_msgTypes[8]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -750,7 +813,7 @@ func (x *DropColumns) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DropColumns.ProtoReflect.Descriptor instead.
 func (*DropColumns) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{7}
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{8}
 }
 
 func (x *DropColumns) GetDropColumns() []*DropColumn {
@@ -771,7 +834,7 @@ type RenameTable struct {
 func (x *RenameTable) Reset() {
 	*x = RenameTable{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_ddl_proto_msgTypes[8]
+		mi := &file_greptime_v1_ddl_proto_msgTypes[9]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -784,7 +847,7 @@ func (x *RenameTable) String() string {
 func (*RenameTable) ProtoMessage() {}
 
 func (x *RenameTable) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_ddl_proto_msgTypes[8]
+	mi := &file_greptime_v1_ddl_proto_msgTypes[9]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -797,7 +860,7 @@ func (x *RenameTable) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use RenameTable.ProtoReflect.Descriptor instead.
 func (*RenameTable) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{8}
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{9}
 }
 
 func (x *RenameTable) GetNewTableName() string {
@@ -819,7 +882,7 @@ type AddColumn struct {
 func (x *AddColumn) Reset() {
 	*x = AddColumn{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_ddl_proto_msgTypes[9]
+		mi := &file_greptime_v1_ddl_proto_msgTypes[10]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -832,7 +895,7 @@ func (x *AddColumn) String() string {
 func (*AddColumn) ProtoMessage() {}
 
 func (x *AddColumn) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_ddl_proto_msgTypes[9]
+	mi := &file_greptime_v1_ddl_proto_msgTypes[10]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -845,7 +908,7 @@ func (x *AddColumn) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use AddColumn.ProtoReflect.Descriptor instead.
 func (*AddColumn) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{9}
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{10}
 }
 
 func (x *AddColumn) GetColumnDef() *ColumnDef {
@@ -873,7 +936,7 @@ type DropColumn struct {
 func (x *DropColumn) Reset() {
 	*x = DropColumn{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_ddl_proto_msgTypes[10]
+		mi := &file_greptime_v1_ddl_proto_msgTypes[11]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -886,7 +949,7 @@ func (x *DropColumn) String() string {
 func (*DropColumn) ProtoMessage() {}
 
 func (x *DropColumn) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_ddl_proto_msgTypes[10]
+	mi := &file_greptime_v1_ddl_proto_msgTypes[11]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -899,7 +962,7 @@ func (x *DropColumn) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use DropColumn.ProtoReflect.Descriptor instead.
 func (*DropColumn) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{10}
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{11}
 }
 
 func (x *DropColumn) GetName() string {
@@ -920,7 +983,7 @@ type TableId struct {
 func (x *TableId) Reset() {
 	*x = TableId{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_ddl_proto_msgTypes[11]
+		mi := &file_greptime_v1_ddl_proto_msgTypes[12]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -933,7 +996,7 @@ func (x *TableId) String() string {
 func (*TableId) ProtoMessage() {}
 
 func (x *TableId) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_ddl_proto_msgTypes[11]
+	mi := &file_greptime_v1_ddl_proto_msgTypes[12]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -946,7 +1009,7 @@ func (x *TableId) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use TableId.ProtoReflect.Descriptor instead.
 func (*TableId) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{11}
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{12}
 }
 
 func (x *TableId) GetId() uint32 {
@@ -974,7 +1037,7 @@ type ColumnDef struct {
 func (x *ColumnDef) Reset() {
 	*x = ColumnDef{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_ddl_proto_msgTypes[12]
+		mi := &file_greptime_v1_ddl_proto_msgTypes[13]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -987,7 +1050,7 @@ func (x *ColumnDef) String() string {
 func (*ColumnDef) ProtoMessage() {}
 
 func (x *ColumnDef) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_ddl_proto_msgTypes[12]
+	mi := &file_greptime_v1_ddl_proto_msgTypes[13]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1000,7 +1063,7 @@ func (x *ColumnDef) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use ColumnDef.ProtoReflect.Descriptor instead.
 func (*ColumnDef) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{12}
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{13}
 }
 
 func (x *ColumnDef) GetName() string {
@@ -1064,7 +1127,7 @@ type AddColumnLocation struct {
 func (x *AddColumnLocation) Reset() {
 	*x = AddColumnLocation{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_ddl_proto_msgTypes[13]
+		mi := &file_greptime_v1_ddl_proto_msgTypes[14]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -1077,7 +1140,7 @@ func (x *AddColumnLocation) String() string {
 func (*AddColumnLocation) ProtoMessage() {}
 
 func (x *AddColumnLocation) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_ddl_proto_msgTypes[13]
+	mi := &file_greptime_v1_ddl_proto_msgTypes[14]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -1090,7 +1153,7 @@ func (x *AddColumnLocation) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use AddColumnLocation.ProtoReflect.Descriptor instead.
 func (*AddColumnLocation) Descriptor() ([]byte, []int) {
-	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{13}
+	return file_greptime_v1_ddl_proto_rawDescGZIP(), []int{14}
 }
 
 func (x *AddColumnLocation) GetLocationType() AddColumnLocation_LocationType {
@@ -1226,70 +1289,78 @@ var file_greptime_v1_ddl_proto_rawDesc = []byte{
 	0x74, 0x61, 0x62, 0x6c, 0x65, 0x4e, 0x61, 0x6d, 0x65, 0x12, 0x2f, 0x0a, 0x08, 0x74, 0x61, 0x62,
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 }
 
 var (
@@ -1305,7 +1376,7 @@ func file_greptime_v1_ddl_proto_rawDescGZIP() []byte {
 }
 
 var file_greptime_v1_ddl_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
-var file_greptime_v1_ddl_proto_msgTypes = make([]protoimpl.MessageInfo, 16)
+var file_greptime_v1_ddl_proto_msgTypes = make([]protoimpl.MessageInfo, 17)
 var file_greptime_v1_ddl_proto_goTypes = []interface{}{
 	(AddColumnLocation_LocationType)(0), // 0: greptime.v1.AddColumnLocation.LocationType
 	(*DdlRequest)(nil),                  // 1: greptime.v1.DdlRequest
@@ -1314,19 +1385,20 @@ var file_greptime_v1_ddl_proto_goTypes = []interface{}{
 	(*DropTableExpr)(nil),               // 4: greptime.v1.DropTableExpr
 	(*CreateDatabaseExpr)(nil),          // 5: greptime.v1.CreateDatabaseExpr
 	(*TruncateTableExpr)(nil),           // 6: greptime.v1.TruncateTableExpr
-	(*AddColumns)(nil),                  // 7: greptime.v1.AddColumns
+	(*DropDatabaseExpr)(nil),            // 7: greptime.v1.DropDatabaseExpr
-	(*DropColumns)(nil),                 // 8: greptime.v1.DropColumns
+	(*AddColumns)(nil),                  // 8: greptime.v1.AddColumns
-	(*RenameTable)(nil),                 // 9: greptime.v1.RenameTable
+	(*DropColumns)(nil),                 // 9: greptime.v1.DropColumns
-	(*AddColumn)(nil),                   // 10: greptime.v1.AddColumn
+	(*RenameTable)(nil),                 // 10: greptime.v1.RenameTable
-	(*DropColumn)(nil),                  // 11: greptime.v1.DropColumn
+	(*AddColumn)(nil),                   // 11: greptime.v1.AddColumn
-	(*TableId)(nil),                     // 12: greptime.v1.TableId
+	(*DropColumn)(nil),                  // 12: greptime.v1.DropColumn
-	(*ColumnDef)(nil),                   // 13: greptime.v1.ColumnDef
+	(*TableId)(nil),                     // 13: greptime.v1.TableId
-	(*AddColumnLocation)(nil),           // 14: greptime.v1.AddColumnLocation
+	(*ColumnDef)(nil),                   // 14: greptime.v1.ColumnDef
-	nil,                                 // 15: greptime.v1.CreateTableExpr.TableOptionsEntry
+	(*AddColumnLocation)(nil),           // 15: greptime.v1.AddColumnLocation
-	nil,                                 // 16: greptime.v1.CreateDatabaseExpr.OptionsEntry
+	nil,                                 // 16: greptime.v1.CreateTableExpr.TableOptionsEntry
-	(ColumnDataType)(0),                 // 17: greptime.v1.ColumnDataType
+	nil,                                 // 17: greptime.v1.CreateDatabaseExpr.OptionsEntry
-	(SemanticType)(0),                   // 18: greptime.v1.SemanticType
+	(ColumnDataType)(0),                 // 18: greptime.v1.ColumnDataType
-	(*ColumnDataTypeExtension)(nil),     // 19: greptime.v1.ColumnDataTypeExtension
+	(SemanticType)(0),                   // 19: greptime.v1.SemanticType
+	(*ColumnDataTypeExtension)(nil),     // 20: greptime.v1.ColumnDataTypeExtension
 }
 var file_greptime_v1_ddl_proto_depIdxs = []int32{
 	5,  // 0: greptime.v1.DdlRequest.create_database:type_name -> greptime.v1.CreateDatabaseExpr
@@ -1334,22 +1406,22 @@ var file_greptime_v1_ddl_proto_depIdxs = []int32{
 	3,  // 2: greptime.v1.DdlRequest.alter:type_name -> greptime.v1.AlterExpr
 	4,  // 3: greptime.v1.DdlRequest.drop_table:type_name -> greptime.v1.DropTableExpr
 	6,  // 4: greptime.v1.DdlRequest.truncate_table:type_name -> greptime.v1.TruncateTableExpr
-	13, // 5: greptime.v1.CreateTableExpr.column_defs:type_name -> greptime.v1.ColumnDef
+	14, // 5: greptime.v1.CreateTableExpr.column_defs:type_name -> greptime.v1.ColumnDef
-	15, // 6: greptime.v1.CreateTableExpr.table_options:type_name -> greptime.v1.CreateTableExpr.TableOptionsEntry
+	16, // 6: greptime.v1.CreateTableExpr.table_options:type_name -> greptime.v1.CreateTableExpr.TableOptionsEntry
-	12, // 7: greptime.v1.CreateTableExpr.table_id:type_name -> greptime.v1.TableId
+	13, // 7: greptime.v1.CreateTableExpr.table_id:type_name -> greptime.v1.TableId
-	7,  // 8: greptime.v1.AlterExpr.add_columns:type_name -> greptime.v1.AddColumns
+	8,  // 8: greptime.v1.AlterExpr.add_columns:type_name -> greptime.v1.AddColumns
-	8,  // 9: greptime.v1.AlterExpr.drop_columns:type_name -> greptime.v1.DropColumns
+	9,  // 9: greptime.v1.AlterExpr.drop_columns:type_name -> greptime.v1.DropColumns
-	9,  // 10: greptime.v1.AlterExpr.rename_table:type_name -> greptime.v1.RenameTable
+	10, // 10: greptime.v1.AlterExpr.rename_table:type_name -> greptime.v1.RenameTable
-	12, // 11: greptime.v1.DropTableExpr.table_id:type_name -> greptime.v1.TableId
+	13, // 11: greptime.v1.DropTableExpr.table_id:type_name -> greptime.v1.TableId
-	16, // 12: greptime.v1.CreateDatabaseExpr.options:type_name -> greptime.v1.CreateDatabaseExpr.OptionsEntry
+	17, // 12: greptime.v1.CreateDatabaseExpr.options:type_name -> greptime.v1.CreateDatabaseExpr.OptionsEntry
-	12, // 13: greptime.v1.TruncateTableExpr.table_id:type_name -> greptime.v1.TableId
+	13, // 13: greptime.v1.TruncateTableExpr.table_id:type_name -> greptime.v1.TableId
-	10, // 14: greptime.v1.AddColumns.add_columns:type_name -> greptime.v1.AddColumn
+	11, // 14: greptime.v1.AddColumns.add_columns:type_name -> greptime.v1.AddColumn
-	11, // 15: greptime.v1.DropColumns.drop_columns:type_name -> greptime.v1.DropColumn
+	12, // 15: greptime.v1.DropColumns.drop_columns:type_name -> greptime.v1.DropColumn
-	13, // 16: greptime.v1.AddColumn.column_def:type_name -> greptime.v1.ColumnDef
+	14, // 16: greptime.v1.AddColumn.column_def:type_name -> greptime.v1.ColumnDef
-	14, // 17: greptime.v1.AddColumn.location:type_name -> greptime.v1.AddColumnLocation
+	15, // 17: greptime.v1.AddColumn.location:type_name -> greptime.v1.AddColumnLocation
-	17, // 18: greptime.v1.ColumnDef.data_type:type_name -> greptime.v1.ColumnDataType
+	18, // 18: greptime.v1.ColumnDef.data_type:type_name -> greptime.v1.ColumnDataType
-	18, // 19: greptime.v1.ColumnDef.semantic_type:type_name -> greptime.v1.SemanticType
+	19, // 19: greptime.v1.ColumnDef.semantic_type:type_name -> greptime.v1.SemanticType
-	19, // 20: greptime.v1.ColumnDef.datatype_extension:type_name -> greptime.v1.ColumnDataTypeExtension
+	20, // 20: greptime.v1.ColumnDef.datatype_extension:type_name -> greptime.v1.ColumnDataTypeExtension
 	0,  // 21: greptime.v1.AddColumnLocation.location_type:type_name -> greptime.v1.AddColumnLocation.LocationType
 	22, // [22:22] is the sub-list for method output_type
 	22, // [22:22] is the sub-list for method input_type
@@ -1438,7 +1510,7 @@ func file_greptime_v1_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_ddl_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*AddColumns); i {
+			switch v := v.(*DropDatabaseExpr); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1450,7 +1522,7 @@ func file_greptime_v1_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_ddl_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DropColumns); i {
+			switch v := v.(*AddColumns); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1462,7 +1534,7 @@ func file_greptime_v1_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_ddl_proto_msgTypes[8].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*RenameTable); i {
+			switch v := v.(*DropColumns); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1474,7 +1546,7 @@ func file_greptime_v1_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_ddl_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*AddColumn); i {
+			switch v := v.(*RenameTable); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1486,7 +1558,7 @@ func file_greptime_v1_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_ddl_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DropColumn); i {
+			switch v := v.(*AddColumn); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1498,7 +1570,7 @@ func file_greptime_v1_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_ddl_proto_msgTypes[11].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*TableId); i {
+			switch v := v.(*DropColumn); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1510,7 +1582,7 @@ func file_greptime_v1_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_ddl_proto_msgTypes[12].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*ColumnDef); i {
+			switch v := v.(*TableId); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -1522,6 +1594,18 @@ func file_greptime_v1_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_ddl_proto_msgTypes[13].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ColumnDef); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_greptime_v1_ddl_proto_msgTypes[14].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*AddColumnLocation); i {
 			case 0:
 				return &v.state
@@ -1552,7 +1636,7 @@ func file_greptime_v1_ddl_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_greptime_v1_ddl_proto_rawDesc,
 			NumEnums:      1,
-			NumMessages:   16,
+			NumMessages:   17,
 			NumExtensions: 0,
 			NumServices:   0,
 		},

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

@@ -426,6 +426,53 @@ func (x *TruncateTableTask) GetTruncateTable() *v1.TruncateTableExpr {
 	return nil
 }
 
+type DropDatabaseTask struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	DropDatabase *v1.DropDatabaseExpr `protobuf:"bytes,1,opt,name=drop_database,json=dropDatabase,proto3" json:"drop_database,omitempty"`
+}
+
+func (x *DropDatabaseTask) Reset() {
+	*x = DropDatabaseTask{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[7]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *DropDatabaseTask) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*DropDatabaseTask) ProtoMessage() {}
+
+func (x *DropDatabaseTask) ProtoReflect() protoreflect.Message {
+	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[7]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use DropDatabaseTask.ProtoReflect.Descriptor instead.
+func (*DropDatabaseTask) Descriptor() ([]byte, []int) {
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{7}
+}
+
+func (x *DropDatabaseTask) GetDropDatabase() *v1.DropDatabaseExpr {
+	if x != nil {
+		return x.DropDatabase
+	}
+	return nil
+}
+
 type DdlTaskRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -441,13 +488,14 @@ type DdlTaskRequest struct {
 	//	*DdlTaskRequest_CreateTableTasks
 	//	*DdlTaskRequest_DropTableTasks
 	//	*DdlTaskRequest_AlterTableTasks
+	//	*DdlTaskRequest_DropDatabaseTask
 	Task isDdlTaskRequest_Task `protobuf_oneof:"task"`
 }
 
 func (x *DdlTaskRequest) Reset() {
 	*x = DdlTaskRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[7]
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[8]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -460,7 +508,7 @@ func (x *DdlTaskRequest) String() string {
 func (*DdlTaskRequest) ProtoMessage() {}
 
 func (x *DdlTaskRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[7]
+	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[8]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -473,7 +521,7 @@ 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{7}
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{8}
 }
 
 func (x *DdlTaskRequest) GetHeader() *RequestHeader {
@@ -539,6 +587,13 @@ func (x *DdlTaskRequest) GetAlterTableTasks() *AlterTableTasks {
 	return nil
 }
 
+func (x *DdlTaskRequest) GetDropDatabaseTask() *DropDatabaseTask {
+	if x, ok := x.GetTask().(*DdlTaskRequest_DropDatabaseTask); ok {
+		return x.DropDatabaseTask
+	}
+	return nil
+}
+
 type isDdlTaskRequest_Task interface {
 	isDdlTaskRequest_Task()
 }
@@ -571,6 +626,10 @@ type DdlTaskRequest_AlterTableTasks struct {
 	AlterTableTasks *AlterTableTasks `protobuf:"bytes,8,opt,name=alter_table_tasks,json=alterTableTasks,proto3,oneof"`
 }
 
+type DdlTaskRequest_DropDatabaseTask struct {
+	DropDatabaseTask *DropDatabaseTask `protobuf:"bytes,9,opt,name=drop_database_task,json=dropDatabaseTask,proto3,oneof"`
+}
+
 func (*DdlTaskRequest_CreateTableTask) isDdlTaskRequest_Task() {}
 
 func (*DdlTaskRequest_DropTableTask) isDdlTaskRequest_Task() {}
@@ -585,6 +644,8 @@ func (*DdlTaskRequest_DropTableTasks) isDdlTaskRequest_Task() {}
 
 func (*DdlTaskRequest_AlterTableTasks) isDdlTaskRequest_Task() {}
 
+func (*DdlTaskRequest_DropDatabaseTask) isDdlTaskRequest_Task() {}
+
 type DdlTaskResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -602,7 +663,7 @@ type DdlTaskResponse struct {
 func (x *DdlTaskResponse) Reset() {
 	*x = DdlTaskResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[8]
+		mi := &file_greptime_v1_meta_ddl_proto_msgTypes[9]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -615,7 +676,7 @@ func (x *DdlTaskResponse) String() string {
 func (*DdlTaskResponse) ProtoMessage() {}
 
 func (x *DdlTaskResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[8]
+	mi := &file_greptime_v1_meta_ddl_proto_msgTypes[9]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -628,7 +689,7 @@ 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{8}
+	return file_greptime_v1_meta_ddl_proto_rawDescGZIP(), []int{9}
 }
 
 func (x *DdlTaskResponse) GetHeader() *ResponseHeader {
@@ -710,69 +771,80 @@ var file_greptime_v1_meta_ddl_proto_rawDesc = []byte{
 	0x6c, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x1e, 0x2e, 0x67, 0x72, 0x65, 0x70, 0x74,
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 }
 
 var (
@@ -788,7 +860,7 @@ 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, 9)
+var file_greptime_v1_meta_ddl_proto_msgTypes = make([]protoimpl.MessageInfo, 10)
 var file_greptime_v1_meta_ddl_proto_goTypes = []interface{}{
 	(DdlTaskType)(0),             // 0: greptime.v1.meta.DdlTaskType
 	(*CreateTableTask)(nil),      // 1: greptime.v1.meta.CreateTableTask
@@ -798,44 +870,48 @@ var file_greptime_v1_meta_ddl_proto_goTypes = []interface{}{
 	(*AlterTableTask)(nil),       // 5: greptime.v1.meta.AlterTableTask
 	(*AlterTableTasks)(nil),      // 6: greptime.v1.meta.AlterTableTasks
 	(*TruncateTableTask)(nil),    // 7: greptime.v1.meta.TruncateTableTask
-	(*DdlTaskRequest)(nil),       // 8: greptime.v1.meta.DdlTaskRequest
+	(*DropDatabaseTask)(nil),     // 8: greptime.v1.meta.DropDatabaseTask
-	(*DdlTaskResponse)(nil),      // 9: greptime.v1.meta.DdlTaskResponse
+	(*DdlTaskRequest)(nil),       // 9: greptime.v1.meta.DdlTaskRequest
-	(*v1.CreateTableExpr)(nil),   // 10: greptime.v1.CreateTableExpr
+	(*DdlTaskResponse)(nil),      // 10: greptime.v1.meta.DdlTaskResponse
-	(*Partition)(nil),            // 11: greptime.v1.meta.Partition
+	(*v1.CreateTableExpr)(nil),   // 11: greptime.v1.CreateTableExpr
-	(*v1.DropTableExpr)(nil),     // 12: greptime.v1.DropTableExpr
+	(*Partition)(nil),            // 12: greptime.v1.meta.Partition
-	(*v1.AlterExpr)(nil),         // 13: greptime.v1.AlterExpr
+	(*v1.DropTableExpr)(nil),     // 13: greptime.v1.DropTableExpr
-	(*v1.TruncateTableExpr)(nil), // 14: greptime.v1.TruncateTableExpr
+	(*v1.AlterExpr)(nil),         // 14: greptime.v1.AlterExpr
-	(*RequestHeader)(nil),        // 15: greptime.v1.meta.RequestHeader
+	(*v1.TruncateTableExpr)(nil), // 15: greptime.v1.TruncateTableExpr
-	(*ResponseHeader)(nil),       // 16: greptime.v1.meta.ResponseHeader
+	(*v1.DropDatabaseExpr)(nil),  // 16: greptime.v1.DropDatabaseExpr
-	(*ProcedureId)(nil),          // 17: greptime.v1.meta.ProcedureId
+	(*RequestHeader)(nil),        // 17: greptime.v1.meta.RequestHeader
-	(*TableId)(nil),              // 18: greptime.v1.meta.TableId
+	(*ResponseHeader)(nil),       // 18: greptime.v1.meta.ResponseHeader
+	(*ProcedureId)(nil),          // 19: greptime.v1.meta.ProcedureId
+	(*TableId)(nil),              // 20: greptime.v1.meta.TableId
 }
 var file_greptime_v1_meta_ddl_proto_depIdxs = []int32{
-	10, // 0: greptime.v1.meta.CreateTableTask.create_table:type_name -> greptime.v1.CreateTableExpr
+	11, // 0: greptime.v1.meta.CreateTableTask.create_table:type_name -> greptime.v1.CreateTableExpr
-	11, // 1: greptime.v1.meta.CreateTableTask.partitions:type_name -> greptime.v1.meta.Partition
+	12, // 1: greptime.v1.meta.CreateTableTask.partitions:type_name -> greptime.v1.meta.Partition
 	1,  // 2: greptime.v1.meta.CreateTableTasks.tasks:type_name -> greptime.v1.meta.CreateTableTask
-	12, // 3: greptime.v1.meta.DropTableTask.drop_table:type_name -> greptime.v1.DropTableExpr
+	13, // 3: greptime.v1.meta.DropTableTask.drop_table:type_name -> greptime.v1.DropTableExpr
 	3,  // 4: greptime.v1.meta.DropTableTasks.tasks:type_name -> greptime.v1.meta.DropTableTask
-	13, // 5: greptime.v1.meta.AlterTableTask.alter_table:type_name -> greptime.v1.AlterExpr
+	14, // 5: greptime.v1.meta.AlterTableTask.alter_table:type_name -> greptime.v1.AlterExpr
 	5,  // 6: greptime.v1.meta.AlterTableTasks.tasks:type_name -> greptime.v1.meta.AlterTableTask
-	14, // 7: greptime.v1.meta.TruncateTableTask.truncate_table:type_name -> greptime.v1.TruncateTableExpr
+	15, // 7: greptime.v1.meta.TruncateTableTask.truncate_table:type_name -> greptime.v1.TruncateTableExpr
-	15, // 8: greptime.v1.meta.DdlTaskRequest.header:type_name -> greptime.v1.meta.RequestHeader
+	16, // 8: greptime.v1.meta.DropDatabaseTask.drop_database:type_name -> greptime.v1.DropDatabaseExpr
-	1,  // 9: greptime.v1.meta.DdlTaskRequest.create_table_task:type_name -> greptime.v1.meta.CreateTableTask
+	17, // 9: greptime.v1.meta.DdlTaskRequest.header:type_name -> greptime.v1.meta.RequestHeader
-	3,  // 10: greptime.v1.meta.DdlTaskRequest.drop_table_task:type_name -> greptime.v1.meta.DropTableTask
+	1,  // 10: greptime.v1.meta.DdlTaskRequest.create_table_task:type_name -> greptime.v1.meta.CreateTableTask
-	5,  // 11: greptime.v1.meta.DdlTaskRequest.alter_table_task:type_name -> greptime.v1.meta.AlterTableTask
+	3,  // 11: greptime.v1.meta.DdlTaskRequest.drop_table_task:type_name -> greptime.v1.meta.DropTableTask
-	7,  // 12: greptime.v1.meta.DdlTaskRequest.truncate_table_task:type_name -> greptime.v1.meta.TruncateTableTask
+	5,  // 12: greptime.v1.meta.DdlTaskRequest.alter_table_task:type_name -> greptime.v1.meta.AlterTableTask
-	2,  // 13: greptime.v1.meta.DdlTaskRequest.create_table_tasks:type_name -> greptime.v1.meta.CreateTableTasks
+	7,  // 13: greptime.v1.meta.DdlTaskRequest.truncate_table_task:type_name -> greptime.v1.meta.TruncateTableTask
-	4,  // 14: greptime.v1.meta.DdlTaskRequest.drop_table_tasks:type_name -> greptime.v1.meta.DropTableTasks
+	2,  // 14: greptime.v1.meta.DdlTaskRequest.create_table_tasks:type_name -> greptime.v1.meta.CreateTableTasks
-	6,  // 15: greptime.v1.meta.DdlTaskRequest.alter_table_tasks:type_name -> greptime.v1.meta.AlterTableTasks
+	4,  // 15: greptime.v1.meta.DdlTaskRequest.drop_table_tasks:type_name -> greptime.v1.meta.DropTableTasks
-	16, // 16: greptime.v1.meta.DdlTaskResponse.header:type_name -> greptime.v1.meta.ResponseHeader
+	6,  // 16: greptime.v1.meta.DdlTaskRequest.alter_table_tasks:type_name -> greptime.v1.meta.AlterTableTasks
-	17, // 17: greptime.v1.meta.DdlTaskResponse.pid:type_name -> greptime.v1.meta.ProcedureId
+	8,  // 17: greptime.v1.meta.DdlTaskRequest.drop_database_task:type_name -> greptime.v1.meta.DropDatabaseTask
-	18, // 18: greptime.v1.meta.DdlTaskResponse.table_id:type_name -> greptime.v1.meta.TableId
+	18, // 18: greptime.v1.meta.DdlTaskResponse.header:type_name -> greptime.v1.meta.ResponseHeader
-	18, // 19: greptime.v1.meta.DdlTaskResponse.table_ids:type_name -> greptime.v1.meta.TableId
+	19, // 19: greptime.v1.meta.DdlTaskResponse.pid:type_name -> greptime.v1.meta.ProcedureId
-	20, // [20:20] is the sub-list for method output_type
+	20, // 20: greptime.v1.meta.DdlTaskResponse.table_id:type_name -> greptime.v1.meta.TableId
-	20, // [20:20] is the sub-list for method input_type
+	20, // 21: greptime.v1.meta.DdlTaskResponse.table_ids:type_name -> greptime.v1.meta.TableId
-	20, // [20:20] is the sub-list for extension type_name
+	22, // [22:22] is the sub-list for method output_type
-	20, // [20:20] is the sub-list for extension extendee
+	22, // [22:22] is the sub-list for method input_type
-	0,  // [0:20] is the sub-list for field type_name
+	22, // [22:22] is the sub-list for extension type_name
+	22, // [22:22] is the sub-list for extension extendee
+	0,  // [0:22] is the sub-list for field type_name
 }
 
 func init() { file_greptime_v1_meta_ddl_proto_init() }
@@ -931,7 +1007,7 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_meta_ddl_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
-			switch v := v.(*DdlTaskRequest); i {
+			switch v := v.(*DropDatabaseTask); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -943,6 +1019,18 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			}
 		}
 		file_greptime_v1_meta_ddl_proto_msgTypes[8].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[9].Exporter = func(v interface{}, i int) interface{} {
 			switch v := v.(*DdlTaskResponse); i {
 			case 0:
 				return &v.state
@@ -955,7 +1043,7 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			}
 		}
 	}
-	file_greptime_v1_meta_ddl_proto_msgTypes[7].OneofWrappers = []interface{}{
+	file_greptime_v1_meta_ddl_proto_msgTypes[8].OneofWrappers = []interface{}{
 		(*DdlTaskRequest_CreateTableTask)(nil),
 		(*DdlTaskRequest_DropTableTask)(nil),
 		(*DdlTaskRequest_AlterTableTask)(nil),
@@ -963,6 +1051,7 @@ func file_greptime_v1_meta_ddl_proto_init() {
 		(*DdlTaskRequest_CreateTableTasks)(nil),
 		(*DdlTaskRequest_DropTableTasks)(nil),
 		(*DdlTaskRequest_AlterTableTasks)(nil),
+		(*DdlTaskRequest_DropDatabaseTask)(nil),
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
@@ -970,7 +1059,7 @@ func file_greptime_v1_meta_ddl_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_greptime_v1_meta_ddl_proto_rawDesc,
 			NumEnums:      1,
-			NumMessages:   9,
+			NumMessages:   10,
 			NumExtensions: 0,
 			NumServices:   0,
 		},

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

@@ -8991,6 +8991,797 @@ java.lang.String defaultValue);
 
   }
 
+  public interface DropDatabaseExprOrBuilder extends
+      // @@protoc_insertion_point(interface_extends:greptime.v1.DropDatabaseExpr)
+      com.google.protobuf.MessageOrBuilder {
+
+    /**
+     * <code>string catalog_name = 1;</code>
+     * @return The catalogName.
+     */
+    java.lang.String getCatalogName();
+    /**
+     * <code>string catalog_name = 1;</code>
+     * @return The bytes for catalogName.
+     */
+    com.google.protobuf.ByteString
+        getCatalogNameBytes();
+
+    /**
+     * <code>string schema_name = 2;</code>
+     * @return The schemaName.
+     */
+    java.lang.String getSchemaName();
+    /**
+     * <code>string schema_name = 2;</code>
+     * @return The bytes for schemaName.
+     */
+    com.google.protobuf.ByteString
+        getSchemaNameBytes();
+
+    /**
+     * <code>bool drop_if_exists = 3;</code>
+     * @return The dropIfExists.
+     */
+    boolean getDropIfExists();
+  }
+  /**
+   * Protobuf type {@code greptime.v1.DropDatabaseExpr}
+   */
+  public static final class DropDatabaseExpr extends
+      com.google.protobuf.GeneratedMessageV3 implements
+      // @@protoc_insertion_point(message_implements:greptime.v1.DropDatabaseExpr)
+      DropDatabaseExprOrBuilder {
+  private static final long serialVersionUID = 0L;
+    // Use DropDatabaseExpr.newBuilder() to construct.
+    private DropDatabaseExpr(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
+      super(builder);
+    }
+    private DropDatabaseExpr() {
+      catalogName_ = "";
+      schemaName_ = "";
+    }
+
+    @java.lang.Override
+    @SuppressWarnings({"unused"})
+    protected java.lang.Object newInstance(
+        UnusedPrivateParameter unused) {
+      return new DropDatabaseExpr();
+    }
+
+    @java.lang.Override
+    public final com.google.protobuf.UnknownFieldSet
+    getUnknownFields() {
+      return this.unknownFields;
+    }
+    private DropDatabaseExpr(
+        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: {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              catalogName_ = s;
+              break;
+            }
+            case 18: {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              schemaName_ = s;
+              break;
+            }
+            case 24: {
+
+              dropIfExists_ = input.readBool();
+              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.Ddl.internal_static_greptime_v1_DropDatabaseExpr_descriptor;
+    }
+
+    @java.lang.Override
+    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return io.greptime.v1.Ddl.internal_static_greptime_v1_DropDatabaseExpr_fieldAccessorTable
+          .ensureFieldAccessorsInitialized(
+              io.greptime.v1.Ddl.DropDatabaseExpr.class, io.greptime.v1.Ddl.DropDatabaseExpr.Builder.class);
+    }
+
+    public static final int CATALOG_NAME_FIELD_NUMBER = 1;
+    private volatile java.lang.Object catalogName_;
+    /**
+     * <code>string catalog_name = 1;</code>
+     * @return The catalogName.
+     */
+    @java.lang.Override
+    public java.lang.String getCatalogName() {
+      java.lang.Object ref = catalogName_;
+      if (ref instanceof java.lang.String) {
+        return (java.lang.String) ref;
+      } else {
+        com.google.protobuf.ByteString bs = 
+            (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        catalogName_ = s;
+        return s;
+      }
+    }
+    /**
+     * <code>string catalog_name = 1;</code>
+     * @return The bytes for catalogName.
+     */
+    @java.lang.Override
+    public com.google.protobuf.ByteString
+        getCatalogNameBytes() {
+      java.lang.Object ref = catalogName_;
+      if (ref instanceof java.lang.String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8(
+                (java.lang.String) ref);
+        catalogName_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+
+    public static final int SCHEMA_NAME_FIELD_NUMBER = 2;
+    private volatile java.lang.Object schemaName_;
+    /**
+     * <code>string schema_name = 2;</code>
+     * @return The schemaName.
+     */
+    @java.lang.Override
+    public java.lang.String getSchemaName() {
+      java.lang.Object ref = schemaName_;
+      if (ref instanceof java.lang.String) {
+        return (java.lang.String) ref;
+      } else {
+        com.google.protobuf.ByteString bs = 
+            (com.google.protobuf.ByteString) ref;
+        java.lang.String s = bs.toStringUtf8();
+        schemaName_ = s;
+        return s;
+      }
+    }
+    /**
+     * <code>string schema_name = 2;</code>
+     * @return The bytes for schemaName.
+     */
+    @java.lang.Override
+    public com.google.protobuf.ByteString
+        getSchemaNameBytes() {
+      java.lang.Object ref = schemaName_;
+      if (ref instanceof java.lang.String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8(
+                (java.lang.String) ref);
+        schemaName_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+
+    public static final int DROP_IF_EXISTS_FIELD_NUMBER = 3;
+    private boolean dropIfExists_;
+    /**
+     * <code>bool drop_if_exists = 3;</code>
+     * @return The dropIfExists.
+     */
+    @java.lang.Override
+    public boolean getDropIfExists() {
+      return dropIfExists_;
+    }
+
+    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 (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(catalogName_)) {
+        com.google.protobuf.GeneratedMessageV3.writeString(output, 1, catalogName_);
+      }
+      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(schemaName_)) {
+        com.google.protobuf.GeneratedMessageV3.writeString(output, 2, schemaName_);
+      }
+      if (dropIfExists_ != false) {
+        output.writeBool(3, dropIfExists_);
+      }
+      unknownFields.writeTo(output);
+    }
+
+    @java.lang.Override
+    public int getSerializedSize() {
+      int size = memoizedSize;
+      if (size != -1) return size;
+
+      size = 0;
+      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(catalogName_)) {
+        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, catalogName_);
+      }
+      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(schemaName_)) {
+        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, schemaName_);
+      }
+      if (dropIfExists_ != false) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBoolSize(3, dropIfExists_);
+      }
+      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.Ddl.DropDatabaseExpr)) {
+        return super.equals(obj);
+      }
+      io.greptime.v1.Ddl.DropDatabaseExpr other = (io.greptime.v1.Ddl.DropDatabaseExpr) obj;
+
+      if (!getCatalogName()
+          .equals(other.getCatalogName())) return false;
+      if (!getSchemaName()
+          .equals(other.getSchemaName())) return false;
+      if (getDropIfExists()
+          != other.getDropIfExists()) 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) + CATALOG_NAME_FIELD_NUMBER;
+      hash = (53 * hash) + getCatalogName().hashCode();
+      hash = (37 * hash) + SCHEMA_NAME_FIELD_NUMBER;
+      hash = (53 * hash) + getSchemaName().hashCode();
+      hash = (37 * hash) + DROP_IF_EXISTS_FIELD_NUMBER;
+      hash = (53 * hash) + com.google.protobuf.Internal.hashBoolean(
+          getDropIfExists());
+      hash = (29 * hash) + unknownFields.hashCode();
+      memoizedHashCode = hash;
+      return hash;
+    }
+
+    public static io.greptime.v1.Ddl.DropDatabaseExpr parseFrom(
+        java.nio.ByteBuffer data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static io.greptime.v1.Ddl.DropDatabaseExpr 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.Ddl.DropDatabaseExpr parseFrom(
+        com.google.protobuf.ByteString data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static io.greptime.v1.Ddl.DropDatabaseExpr 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.Ddl.DropDatabaseExpr parseFrom(byte[] data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data);
+    }
+    public static io.greptime.v1.Ddl.DropDatabaseExpr parseFrom(
+        byte[] data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return PARSER.parseFrom(data, extensionRegistry);
+    }
+    public static io.greptime.v1.Ddl.DropDatabaseExpr parseFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseWithIOException(PARSER, input);
+    }
+    public static io.greptime.v1.Ddl.DropDatabaseExpr 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.Ddl.DropDatabaseExpr parseDelimitedFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseDelimitedWithIOException(PARSER, input);
+    }
+    public static io.greptime.v1.Ddl.DropDatabaseExpr 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.Ddl.DropDatabaseExpr parseFrom(
+        com.google.protobuf.CodedInputStream input)
+        throws java.io.IOException {
+      return com.google.protobuf.GeneratedMessageV3
+          .parseWithIOException(PARSER, input);
+    }
+    public static io.greptime.v1.Ddl.DropDatabaseExpr 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.Ddl.DropDatabaseExpr 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.DropDatabaseExpr}
+     */
+    public static final class Builder extends
+        com.google.protobuf.GeneratedMessageV3.Builder<Builder> implements
+        // @@protoc_insertion_point(builder_implements:greptime.v1.DropDatabaseExpr)
+        io.greptime.v1.Ddl.DropDatabaseExprOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return io.greptime.v1.Ddl.internal_static_greptime_v1_DropDatabaseExpr_descriptor;
+      }
+
+      @java.lang.Override
+      protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return io.greptime.v1.Ddl.internal_static_greptime_v1_DropDatabaseExpr_fieldAccessorTable
+            .ensureFieldAccessorsInitialized(
+                io.greptime.v1.Ddl.DropDatabaseExpr.class, io.greptime.v1.Ddl.DropDatabaseExpr.Builder.class);
+      }
+
+      // Construct using io.greptime.v1.Ddl.DropDatabaseExpr.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();
+        catalogName_ = "";
+
+        schemaName_ = "";
+
+        dropIfExists_ = false;
+
+        return this;
+      }
+
+      @java.lang.Override
+      public com.google.protobuf.Descriptors.Descriptor
+          getDescriptorForType() {
+        return io.greptime.v1.Ddl.internal_static_greptime_v1_DropDatabaseExpr_descriptor;
+      }
+
+      @java.lang.Override
+      public io.greptime.v1.Ddl.DropDatabaseExpr getDefaultInstanceForType() {
+        return io.greptime.v1.Ddl.DropDatabaseExpr.getDefaultInstance();
+      }
+
+      @java.lang.Override
+      public io.greptime.v1.Ddl.DropDatabaseExpr build() {
+        io.greptime.v1.Ddl.DropDatabaseExpr result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(result);
+        }
+        return result;
+      }
+
+      @java.lang.Override
+      public io.greptime.v1.Ddl.DropDatabaseExpr buildPartial() {
+        io.greptime.v1.Ddl.DropDatabaseExpr result = new io.greptime.v1.Ddl.DropDatabaseExpr(this);
+        result.catalogName_ = catalogName_;
+        result.schemaName_ = schemaName_;
+        result.dropIfExists_ = dropIfExists_;
+        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.Ddl.DropDatabaseExpr) {
+          return mergeFrom((io.greptime.v1.Ddl.DropDatabaseExpr)other);
+        } else {
+          super.mergeFrom(other);
+          return this;
+        }
+      }
+
+      public Builder mergeFrom(io.greptime.v1.Ddl.DropDatabaseExpr other) {
+        if (other == io.greptime.v1.Ddl.DropDatabaseExpr.getDefaultInstance()) return this;
+        if (!other.getCatalogName().isEmpty()) {
+          catalogName_ = other.catalogName_;
+          onChanged();
+        }
+        if (!other.getSchemaName().isEmpty()) {
+          schemaName_ = other.schemaName_;
+          onChanged();
+        }
+        if (other.getDropIfExists() != false) {
+          setDropIfExists(other.getDropIfExists());
+        }
+        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.Ddl.DropDatabaseExpr parsedMessage = null;
+        try {
+          parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
+        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
+          parsedMessage = (io.greptime.v1.Ddl.DropDatabaseExpr) e.getUnfinishedMessage();
+          throw e.unwrapIOException();
+        } finally {
+          if (parsedMessage != null) {
+            mergeFrom(parsedMessage);
+          }
+        }
+        return this;
+      }
+
+      private java.lang.Object catalogName_ = "";
+      /**
+       * <code>string catalog_name = 1;</code>
+       * @return The catalogName.
+       */
+      public java.lang.String getCatalogName() {
+        java.lang.Object ref = catalogName_;
+        if (!(ref instanceof java.lang.String)) {
+          com.google.protobuf.ByteString bs =
+              (com.google.protobuf.ByteString) ref;
+          java.lang.String s = bs.toStringUtf8();
+          catalogName_ = s;
+          return s;
+        } else {
+          return (java.lang.String) ref;
+        }
+      }
+      /**
+       * <code>string catalog_name = 1;</code>
+       * @return The bytes for catalogName.
+       */
+      public com.google.protobuf.ByteString
+          getCatalogNameBytes() {
+        java.lang.Object ref = catalogName_;
+        if (ref instanceof String) {
+          com.google.protobuf.ByteString b = 
+              com.google.protobuf.ByteString.copyFromUtf8(
+                  (java.lang.String) ref);
+          catalogName_ = b;
+          return b;
+        } else {
+          return (com.google.protobuf.ByteString) ref;
+        }
+      }
+      /**
+       * <code>string catalog_name = 1;</code>
+       * @param value The catalogName to set.
+       * @return This builder for chaining.
+       */
+      public Builder setCatalogName(
+          java.lang.String value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  
+        catalogName_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>string catalog_name = 1;</code>
+       * @return This builder for chaining.
+       */
+      public Builder clearCatalogName() {
+        
+        catalogName_ = getDefaultInstance().getCatalogName();
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>string catalog_name = 1;</code>
+       * @param value The bytes for catalogName to set.
+       * @return This builder for chaining.
+       */
+      public Builder setCatalogNameBytes(
+          com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  checkByteStringIsUtf8(value);
+        
+        catalogName_ = value;
+        onChanged();
+        return this;
+      }
+
+      private java.lang.Object schemaName_ = "";
+      /**
+       * <code>string schema_name = 2;</code>
+       * @return The schemaName.
+       */
+      public java.lang.String getSchemaName() {
+        java.lang.Object ref = schemaName_;
+        if (!(ref instanceof java.lang.String)) {
+          com.google.protobuf.ByteString bs =
+              (com.google.protobuf.ByteString) ref;
+          java.lang.String s = bs.toStringUtf8();
+          schemaName_ = s;
+          return s;
+        } else {
+          return (java.lang.String) ref;
+        }
+      }
+      /**
+       * <code>string schema_name = 2;</code>
+       * @return The bytes for schemaName.
+       */
+      public com.google.protobuf.ByteString
+          getSchemaNameBytes() {
+        java.lang.Object ref = schemaName_;
+        if (ref instanceof String) {
+          com.google.protobuf.ByteString b = 
+              com.google.protobuf.ByteString.copyFromUtf8(
+                  (java.lang.String) ref);
+          schemaName_ = b;
+          return b;
+        } else {
+          return (com.google.protobuf.ByteString) ref;
+        }
+      }
+      /**
+       * <code>string schema_name = 2;</code>
+       * @param value The schemaName to set.
+       * @return This builder for chaining.
+       */
+      public Builder setSchemaName(
+          java.lang.String value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  
+        schemaName_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>string schema_name = 2;</code>
+       * @return This builder for chaining.
+       */
+      public Builder clearSchemaName() {
+        
+        schemaName_ = getDefaultInstance().getSchemaName();
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>string schema_name = 2;</code>
+       * @param value The bytes for schemaName to set.
+       * @return This builder for chaining.
+       */
+      public Builder setSchemaNameBytes(
+          com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  checkByteStringIsUtf8(value);
+        
+        schemaName_ = value;
+        onChanged();
+        return this;
+      }
+
+      private boolean dropIfExists_ ;
+      /**
+       * <code>bool drop_if_exists = 3;</code>
+       * @return The dropIfExists.
+       */
+      @java.lang.Override
+      public boolean getDropIfExists() {
+        return dropIfExists_;
+      }
+      /**
+       * <code>bool drop_if_exists = 3;</code>
+       * @param value The dropIfExists to set.
+       * @return This builder for chaining.
+       */
+      public Builder setDropIfExists(boolean value) {
+        
+        dropIfExists_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>bool drop_if_exists = 3;</code>
+       * @return This builder for chaining.
+       */
+      public Builder clearDropIfExists() {
+        
+        dropIfExists_ = false;
+        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.DropDatabaseExpr)
+    }
+
+    // @@protoc_insertion_point(class_scope:greptime.v1.DropDatabaseExpr)
+    private static final io.greptime.v1.Ddl.DropDatabaseExpr DEFAULT_INSTANCE;
+    static {
+      DEFAULT_INSTANCE = new io.greptime.v1.Ddl.DropDatabaseExpr();
+    }
+
+    public static io.greptime.v1.Ddl.DropDatabaseExpr getDefaultInstance() {
+      return DEFAULT_INSTANCE;
+    }
+
+    private static final com.google.protobuf.Parser<DropDatabaseExpr>
+        PARSER = new com.google.protobuf.AbstractParser<DropDatabaseExpr>() {
+      @java.lang.Override
+      public DropDatabaseExpr parsePartialFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        return new DropDatabaseExpr(input, extensionRegistry);
+      }
+    };
+
+    public static com.google.protobuf.Parser<DropDatabaseExpr> parser() {
+      return PARSER;
+    }
+
+    @java.lang.Override
+    public com.google.protobuf.Parser<DropDatabaseExpr> getParserForType() {
+      return PARSER;
+    }
+
+    @java.lang.Override
+    public io.greptime.v1.Ddl.DropDatabaseExpr getDefaultInstanceForType() {
+      return DEFAULT_INSTANCE;
+    }
+
+  }
+
   public interface AddColumnsOrBuilder extends
       // @@protoc_insertion_point(interface_extends:greptime.v1.AddColumns)
       com.google.protobuf.MessageOrBuilder {
@@ -15204,6 +15995,11 @@ java.lang.String defaultValue);
   private static final 
     com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
       internal_static_greptime_v1_TruncateTableExpr_fieldAccessorTable;
+  private static final com.google.protobuf.Descriptors.Descriptor
+    internal_static_greptime_v1_DropDatabaseExpr_descriptor;
+  private static final 
+    com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
+      internal_static_greptime_v1_DropDatabaseExpr_fieldAccessorTable;
   private static final com.google.protobuf.Descriptors.Descriptor
     internal_static_greptime_v1_AddColumns_descriptor;
   private static final 
@@ -15288,28 +16084,30 @@ java.lang.String defaultValue);
       "ey\030\001 \001(\t\022\r\n\005value\030\002 \001(\t:\0028\001\"z\n\021TruncateT" +
       "ableExpr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n\013schema" +
       "_name\030\002 \001(\t\022\022\n\ntable_name\030\003 \001(\t\022&\n\010table" +
-      "_id\030\004 \001(\0132\024.greptime.v1.TableId\"9\n\nAddCo" +
+      "_id\030\004 \001(\0132\024.greptime.v1.TableId\"U\n\020DropD" +
-      "lumns\022+\n\013add_columns\030\001 \003(\0132\026.greptime.v1" +
+      "atabaseExpr\022\024\n\014catalog_name\030\001 \001(\t\022\023\n\013sch" +
-      ".AddColumn\"<\n\013DropColumns\022-\n\014drop_column" +
+      "ema_name\030\002 \001(\t\022\026\n\016drop_if_exists\030\003 \001(\010\"9" +
-      "s\030\001 \003(\0132\027.greptime.v1.DropColumn\"%\n\013Rena" +
+      "\n\nAddColumns\022+\n\013add_columns\030\001 \003(\0132\026.grep" +
-      "meTable\022\026\n\016new_table_name\030\001 \001(\t\"i\n\tAddCo" +
+      "time.v1.AddColumn\"<\n\013DropColumns\022-\n\014drop" +
-      "lumn\022*\n\ncolumn_def\030\001 \001(\0132\026.greptime.v1.C" +
+      "_columns\030\001 \003(\0132\027.greptime.v1.DropColumn\"" +
-      "olumnDef\0220\n\010location\030\003 \001(\0132\036.greptime.v1" +
+      "%\n\013RenameTable\022\026\n\016new_table_name\030\001 \001(\t\"i" +
-      ".AddColumnLocation\"\032\n\nDropColumn\022\014\n\004name" +
+      "\n\tAddColumn\022*\n\ncolumn_def\030\001 \001(\0132\026.grepti" +
-      "\030\001 \001(\t\"\025\n\007TableId\022\n\n\002id\030\001 \001(\r\"\377\001\n\tColumn" +
+      "me.v1.ColumnDef\0220\n\010location\030\003 \001(\0132\036.grep" +
-      "Def\022\014\n\004name\030\001 \001(\t\022.\n\tdata_type\030\002 \001(\0162\033.g" +
+      "time.v1.AddColumnLocation\"\032\n\nDropColumn\022" +
-      "reptime.v1.ColumnDataType\022\023\n\013is_nullable" +
+      "\014\n\004name\030\001 \001(\t\"\025\n\007TableId\022\n\n\002id\030\001 \001(\r\"\377\001\n" +
-      "\030\003 \001(\010\022\032\n\022default_constraint\030\004 \001(\014\0220\n\rse" +
+      "\tColumnDef\022\014\n\004name\030\001 \001(\t\022.\n\tdata_type\030\002 " +
-      "mantic_type\030\005 \001(\0162\031.greptime.v1.Semantic" +
+      "\001(\0162\033.greptime.v1.ColumnDataType\022\023\n\013is_n" +
-      "Type\022\017\n\007comment\030\006 \001(\t\022@\n\022datatype_extens" +
+      "ullable\030\003 \001(\010\022\032\n\022default_constraint\030\004 \001(" +
-      "ion\030\007 \001(\0132$.greptime.v1.ColumnDataTypeEx" +
+      "\014\0220\n\rsemantic_type\030\005 \001(\0162\031.greptime.v1.S" +
-      "tension\"\230\001\n\021AddColumnLocation\022B\n\rlocatio" +
+      "emanticType\022\017\n\007comment\030\006 \001(\t\022@\n\022datatype" +
-      "n_type\030\001 \001(\0162+.greptime.v1.AddColumnLoca" +
+      "_extension\030\007 \001(\0132$.greptime.v1.ColumnDat" +
-      "tion.LocationType\022\031\n\021after_column_name\030\002" +
+      "aTypeExtension\"\230\001\n\021AddColumnLocation\022B\n\r" +
-      " \001(\t\"$\n\014LocationType\022\t\n\005FIRST\020\000\022\t\n\005AFTER" +
+      "location_type\030\001 \001(\0162+.greptime.v1.AddCol" +
-      "\020\001BL\n\016io.greptime.v1B\003DdlZ5github.com/Gr" +
+      "umnLocation.LocationType\022\031\n\021after_column" +
-      "eptimeTeam/greptime-proto/go/greptime/v1" +
+      "_name\030\002 \001(\t\"$\n\014LocationType\022\t\n\005FIRST\020\000\022\t" +
-      "b\006proto3"
+      "\n\005AFTER\020\001BL\n\016io.greptime.v1B\003DdlZ5github" +
+      ".com/GreptimeTeam/greptime-proto/go/grep" +
+      "time/v1b\006proto3"
     };
     descriptor = com.google.protobuf.Descriptors.FileDescriptor
       .internalBuildGeneratedFileFrom(descriptorData,
@@ -15364,50 +16162,56 @@ java.lang.String defaultValue);
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_TruncateTableExpr_descriptor,
         new java.lang.String[] { "CatalogName", "SchemaName", "TableName", "TableId", });
-    internal_static_greptime_v1_AddColumns_descriptor =
+    internal_static_greptime_v1_DropDatabaseExpr_descriptor =
       getDescriptor().getMessageTypes().get(6);
+    internal_static_greptime_v1_DropDatabaseExpr_fieldAccessorTable = new
+      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
+        internal_static_greptime_v1_DropDatabaseExpr_descriptor,
+        new java.lang.String[] { "CatalogName", "SchemaName", "DropIfExists", });
+    internal_static_greptime_v1_AddColumns_descriptor =
+      getDescriptor().getMessageTypes().get(7);
     internal_static_greptime_v1_AddColumns_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_AddColumns_descriptor,
         new java.lang.String[] { "AddColumns", });
     internal_static_greptime_v1_DropColumns_descriptor =
-      getDescriptor().getMessageTypes().get(7);
+      getDescriptor().getMessageTypes().get(8);
     internal_static_greptime_v1_DropColumns_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_DropColumns_descriptor,
         new java.lang.String[] { "DropColumns", });
     internal_static_greptime_v1_RenameTable_descriptor =
-      getDescriptor().getMessageTypes().get(8);
+      getDescriptor().getMessageTypes().get(9);
     internal_static_greptime_v1_RenameTable_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_RenameTable_descriptor,
         new java.lang.String[] { "NewTableName", });
     internal_static_greptime_v1_AddColumn_descriptor =
-      getDescriptor().getMessageTypes().get(9);
+      getDescriptor().getMessageTypes().get(10);
     internal_static_greptime_v1_AddColumn_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_AddColumn_descriptor,
         new java.lang.String[] { "ColumnDef", "Location", });
     internal_static_greptime_v1_DropColumn_descriptor =
-      getDescriptor().getMessageTypes().get(10);
+      getDescriptor().getMessageTypes().get(11);
     internal_static_greptime_v1_DropColumn_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_DropColumn_descriptor,
         new java.lang.String[] { "Name", });
     internal_static_greptime_v1_TableId_descriptor =
-      getDescriptor().getMessageTypes().get(11);
+      getDescriptor().getMessageTypes().get(12);
     internal_static_greptime_v1_TableId_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_TableId_descriptor,
         new java.lang.String[] { "Id", });
     internal_static_greptime_v1_ColumnDef_descriptor =
-      getDescriptor().getMessageTypes().get(12);
+      getDescriptor().getMessageTypes().get(13);
     internal_static_greptime_v1_ColumnDef_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_ColumnDef_descriptor,
         new java.lang.String[] { "Name", "DataType", "IsNullable", "DefaultConstraint", "SemanticType", "Comment", "DatatypeExtension", });
     internal_static_greptime_v1_AddColumnLocation_descriptor =
-      getDescriptor().getMessageTypes().get(13);
+      getDescriptor().getMessageTypes().get(14);
     internal_static_greptime_v1_AddColumnLocation_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_AddColumnLocation_descriptor,

proto/greptime/v1/ddl.proto

@@ -82,6 +82,12 @@ message TruncateTableExpr {
   TableId table_id = 4;
 }
 
+message DropDatabaseExpr {
+  string catalog_name = 1;
+  string schema_name = 2;
+  bool drop_if_exists = 3;
+}
+
 message AddColumns { repeated AddColumn add_columns = 1; }
 
 message DropColumns { repeated DropColumn drop_columns = 1; }

proto/greptime/v1/meta/ddl.proto

@@ -51,6 +51,10 @@ message TruncateTableTask {
     TruncateTableExpr truncate_table = 1;
 }
 
+message DropDatabaseTask {
+    DropDatabaseExpr drop_database = 1;
+}
+
 message DdlTaskRequest {
     RequestHeader header = 1;
 
@@ -62,6 +66,7 @@ message DdlTaskRequest {
         CreateTableTasks create_table_tasks = 6;
         DropTableTasks drop_table_tasks = 7;
         AlterTableTasks alter_table_tasks = 8;
+        DropDatabaseTask drop_database_task = 9;
      }
 }