feat: add DROP DEFAULT (#246)

Signed-off-by: Yihai Lin <yihai-lin@foxmail.com>

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

@@ -111,6 +111,12 @@ extern DropColumnsDefaultTypeInternal _DropColumns_default_instance_;
 class DropDatabaseExpr;
 struct DropDatabaseExprDefaultTypeInternal;
 extern DropDatabaseExprDefaultTypeInternal _DropDatabaseExpr_default_instance_;
+class DropDefault;
+struct DropDefaultDefaultTypeInternal;
+extern DropDefaultDefaultTypeInternal _DropDefault_default_instance_;
+class DropDefaults;
+struct DropDefaultsDefaultTypeInternal;
+extern DropDefaultsDefaultTypeInternal _DropDefaults_default_instance_;
 class DropFlowExpr;
 struct DropFlowExprDefaultTypeInternal;
 extern DropFlowExprDefaultTypeInternal _DropFlowExpr_default_instance_;
@@ -209,6 +215,8 @@ template<> ::greptime::v1::DdlRequest* Arena::CreateMaybeMessage<::greptime::v1:
 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::DropDefault* Arena::CreateMaybeMessage<::greptime::v1::DropDefault>(Arena*);
+template<> ::greptime::v1::DropDefaults* Arena::CreateMaybeMessage<::greptime::v1::DropDefaults>(Arena*);
 template<> ::greptime::v1::DropFlowExpr* Arena::CreateMaybeMessage<::greptime::v1::DropFlowExpr>(Arena*);
 template<> ::greptime::v1::DropTableExpr* Arena::CreateMaybeMessage<::greptime::v1::DropTableExpr>(Arena*);
 template<> ::greptime::v1::DropViewExpr* Arena::CreateMaybeMessage<::greptime::v1::DropViewExpr>(Arena*);
@@ -2191,6 +2199,7 @@ class AlterTableExpr final :
     kUnsetTableOptions = 11,
     kSetIndex = 12,
     kUnsetIndex = 13,
+    kDropDefaults = 14,
     KIND_NOT_SET = 0,
   };
 
@@ -2283,6 +2292,7 @@ class AlterTableExpr final :
     kUnsetTableOptionsFieldNumber = 11,
     kSetIndexFieldNumber = 12,
     kUnsetIndexFieldNumber = 13,
+    kDropDefaultsFieldNumber = 14,
   };
   // string catalog_name = 1;
   void clear_catalog_name();
@@ -2470,6 +2480,24 @@ class AlterTableExpr final :
       ::greptime::v1::UnsetIndex* unset_index);
   ::greptime::v1::UnsetIndex* unsafe_arena_release_unset_index();
 
+  // .greptime.v1.DropDefaults drop_defaults = 14;
+  bool has_drop_defaults() const;
+  private:
+  bool _internal_has_drop_defaults() const;
+  public:
+  void clear_drop_defaults();
+  const ::greptime::v1::DropDefaults& drop_defaults() const;
+  PROTOBUF_NODISCARD ::greptime::v1::DropDefaults* release_drop_defaults();
+  ::greptime::v1::DropDefaults* mutable_drop_defaults();
+  void set_allocated_drop_defaults(::greptime::v1::DropDefaults* drop_defaults);
+  private:
+  const ::greptime::v1::DropDefaults& _internal_drop_defaults() const;
+  ::greptime::v1::DropDefaults* _internal_mutable_drop_defaults();
+  public:
+  void unsafe_arena_set_allocated_drop_defaults(
+      ::greptime::v1::DropDefaults* drop_defaults);
+  ::greptime::v1::DropDefaults* unsafe_arena_release_drop_defaults();
+
   void clear_kind();
   KindCase kind_case() const;
   // @@protoc_insertion_point(class_scope:greptime.v1.AlterTableExpr)
@@ -2483,6 +2511,7 @@ class AlterTableExpr final :
   void set_has_unset_table_options();
   void set_has_set_index();
   void set_has_unset_index();
+  void set_has_drop_defaults();
 
   inline bool has_kind() const;
   inline void clear_has_kind();
@@ -2505,6 +2534,7 @@ class AlterTableExpr final :
       ::greptime::v1::UnsetTableOptions* unset_table_options_;
       ::greptime::v1::SetIndex* set_index_;
       ::greptime::v1::UnsetIndex* unset_index_;
+      ::greptime::v1::DropDefaults* drop_defaults_;
     } kind_;
     mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
     uint32_t _oneof_case_[1];
@@ -2515,6 +2545,159 @@ class AlterTableExpr final :
 };
 // -------------------------------------------------------------------
 
+class DropDefault final :
+    public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:greptime.v1.DropDefault) */ {
+ public:
+  inline DropDefault() : DropDefault(nullptr) {}
+  ~DropDefault() override;
+  explicit PROTOBUF_CONSTEXPR DropDefault(::PROTOBUF_NAMESPACE_ID::internal::ConstantInitialized);
+
+  DropDefault(const DropDefault& from);
+  DropDefault(DropDefault&& from) noexcept
+    : DropDefault() {
+    *this = ::std::move(from);
+  }
+
+  inline DropDefault& operator=(const DropDefault& from) {
+    CopyFrom(from);
+    return *this;
+  }
+  inline DropDefault& operator=(DropDefault&& 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 DropDefault& default_instance() {
+    return *internal_default_instance();
+  }
+  static inline const DropDefault* internal_default_instance() {
+    return reinterpret_cast<const DropDefault*>(
+               &_DropDefault_default_instance_);
+  }
+  static constexpr int kIndexInFileMessages =
+    9;
+
+  friend void swap(DropDefault& a, DropDefault& b) {
+    a.Swap(&b);
+  }
+  inline void Swap(DropDefault* 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(DropDefault* other) {
+    if (other == this) return;
+    GOOGLE_DCHECK(GetOwningArena() == other->GetOwningArena());
+    InternalSwap(other);
+  }
+
+  // implements Message ----------------------------------------------
+
+  DropDefault* New(::PROTOBUF_NAMESPACE_ID::Arena* arena = nullptr) const final {
+    return CreateMaybeMessage<DropDefault>(arena);
+  }
+  using ::PROTOBUF_NAMESPACE_ID::Message::CopyFrom;
+  void CopyFrom(const DropDefault& from);
+  using ::PROTOBUF_NAMESPACE_ID::Message::MergeFrom;
+  void MergeFrom( const DropDefault& from) {
+    DropDefault::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(DropDefault* other);
+
+  private:
+  friend class ::PROTOBUF_NAMESPACE_ID::internal::AnyMetadata;
+  static ::PROTOBUF_NAMESPACE_ID::StringPiece FullMessageName() {
+    return "greptime.v1.DropDefault";
+  }
+  protected:
+  explicit DropDefault(::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 {
+    kColumnNameFieldNumber = 1,
+  };
+  // string column_name = 1;
+  void clear_column_name();
+  const std::string& column_name() const;
+  template <typename ArgT0 = const std::string&, typename... ArgT>
+  void set_column_name(ArgT0&& arg0, ArgT... args);
+  std::string* mutable_column_name();
+  PROTOBUF_NODISCARD std::string* release_column_name();
+  void set_allocated_column_name(std::string* column_name);
+  private:
+  const std::string& _internal_column_name() const;
+  inline PROTOBUF_ALWAYS_INLINE void _internal_set_column_name(const std::string& value);
+  std::string* _internal_mutable_column_name();
+  public:
+
+  // @@protoc_insertion_point(class_scope:greptime.v1.DropDefault)
+ 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 column_name_;
+    mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
+  };
+  union { Impl_ _impl_; };
+  friend struct ::TableStruct_greptime_2fv1_2fddl_2eproto;
+};
+// -------------------------------------------------------------------
+
 class SetIndex final :
     public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:greptime.v1.SetIndex) */ {
  public:
@@ -2570,7 +2753,7 @@ class SetIndex final :
                &_SetIndex_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    9;
+    10;
 
   friend void swap(SetIndex& a, SetIndex& b) {
     a.Swap(&b);
@@ -2788,7 +2971,7 @@ class UnsetIndex final :
                &_UnsetIndex_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    10;
+    11;
 
   friend void swap(UnsetIndex& a, UnsetIndex& b) {
     a.Swap(&b);
@@ -2999,7 +3182,7 @@ class DropTableExpr final :
                &_DropTableExpr_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    11;
+    12;
 
   friend void swap(DropTableExpr& a, DropTableExpr& b) {
     a.Swap(&b);
@@ -3243,7 +3426,7 @@ class CreateDatabaseExpr final :
                &_CreateDatabaseExpr_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    13;
+    14;
 
   friend void swap(CreateDatabaseExpr& a, CreateDatabaseExpr& b) {
     a.Swap(&b);
@@ -3449,7 +3632,7 @@ class TruncateTableExpr final :
                &_TruncateTableExpr_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    14;
+    15;
 
   friend void swap(TruncateTableExpr& a, TruncateTableExpr& b) {
     a.Swap(&b);
@@ -3654,7 +3837,7 @@ class DropDatabaseExpr final :
                &_DropDatabaseExpr_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    15;
+    16;
 
   friend void swap(DropDatabaseExpr& a, DropDatabaseExpr& b) {
     a.Swap(&b);
@@ -3834,7 +4017,7 @@ class AddColumns final :
                &_AddColumns_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    16;
+    17;
 
   friend void swap(AddColumns& a, AddColumns& b) {
     a.Swap(&b);
@@ -3943,6 +4126,163 @@ class AddColumns final :
 };
 // -------------------------------------------------------------------
 
+class DropDefaults final :
+    public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:greptime.v1.DropDefaults) */ {
+ public:
+  inline DropDefaults() : DropDefaults(nullptr) {}
+  ~DropDefaults() override;
+  explicit PROTOBUF_CONSTEXPR DropDefaults(::PROTOBUF_NAMESPACE_ID::internal::ConstantInitialized);
+
+  DropDefaults(const DropDefaults& from);
+  DropDefaults(DropDefaults&& from) noexcept
+    : DropDefaults() {
+    *this = ::std::move(from);
+  }
+
+  inline DropDefaults& operator=(const DropDefaults& from) {
+    CopyFrom(from);
+    return *this;
+  }
+  inline DropDefaults& operator=(DropDefaults&& 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 DropDefaults& default_instance() {
+    return *internal_default_instance();
+  }
+  static inline const DropDefaults* internal_default_instance() {
+    return reinterpret_cast<const DropDefaults*>(
+               &_DropDefaults_default_instance_);
+  }
+  static constexpr int kIndexInFileMessages =
+    18;
+
+  friend void swap(DropDefaults& a, DropDefaults& b) {
+    a.Swap(&b);
+  }
+  inline void Swap(DropDefaults* 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(DropDefaults* other) {
+    if (other == this) return;
+    GOOGLE_DCHECK(GetOwningArena() == other->GetOwningArena());
+    InternalSwap(other);
+  }
+
+  // implements Message ----------------------------------------------
+
+  DropDefaults* New(::PROTOBUF_NAMESPACE_ID::Arena* arena = nullptr) const final {
+    return CreateMaybeMessage<DropDefaults>(arena);
+  }
+  using ::PROTOBUF_NAMESPACE_ID::Message::CopyFrom;
+  void CopyFrom(const DropDefaults& from);
+  using ::PROTOBUF_NAMESPACE_ID::Message::MergeFrom;
+  void MergeFrom( const DropDefaults& from) {
+    DropDefaults::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(DropDefaults* other);
+
+  private:
+  friend class ::PROTOBUF_NAMESPACE_ID::internal::AnyMetadata;
+  static ::PROTOBUF_NAMESPACE_ID::StringPiece FullMessageName() {
+    return "greptime.v1.DropDefaults";
+  }
+  protected:
+  explicit DropDefaults(::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 {
+    kDropDefaultsFieldNumber = 1,
+  };
+  // repeated .greptime.v1.DropDefault drop_defaults = 1;
+  int drop_defaults_size() const;
+  private:
+  int _internal_drop_defaults_size() const;
+  public:
+  void clear_drop_defaults();
+  ::greptime::v1::DropDefault* mutable_drop_defaults(int index);
+  ::PROTOBUF_NAMESPACE_ID::RepeatedPtrField< ::greptime::v1::DropDefault >*
+      mutable_drop_defaults();
+  private:
+  const ::greptime::v1::DropDefault& _internal_drop_defaults(int index) const;
+  ::greptime::v1::DropDefault* _internal_add_drop_defaults();
+  public:
+  const ::greptime::v1::DropDefault& drop_defaults(int index) const;
+  ::greptime::v1::DropDefault* add_drop_defaults();
+  const ::PROTOBUF_NAMESPACE_ID::RepeatedPtrField< ::greptime::v1::DropDefault >&
+      drop_defaults() const;
+
+  // @@protoc_insertion_point(class_scope:greptime.v1.DropDefaults)
+ private:
+  class _Internal;
+
+  template <typename T> friend class ::PROTOBUF_NAMESPACE_ID::Arena::InternalHelper;
+  typedef void InternalArenaConstructable_;
+  typedef void DestructorSkippable_;
+  struct Impl_ {
+    ::PROTOBUF_NAMESPACE_ID::RepeatedPtrField< ::greptime::v1::DropDefault > drop_defaults_;
+    mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
+  };
+  union { Impl_ _impl_; };
+  friend struct ::TableStruct_greptime_2fv1_2fddl_2eproto;
+};
+// -------------------------------------------------------------------
+
 class DropColumns final :
     public ::PROTOBUF_NAMESPACE_ID::Message /* @@protoc_insertion_point(class_definition:greptime.v1.DropColumns) */ {
  public:
@@ -3991,7 +4331,7 @@ class DropColumns final :
                &_DropColumns_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    17;
+    19;
 
   friend void swap(DropColumns& a, DropColumns& b) {
     a.Swap(&b);
@@ -4148,7 +4488,7 @@ class ModifyColumnTypes final :
                &_ModifyColumnTypes_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    18;
+    20;
 
   friend void swap(ModifyColumnTypes& a, ModifyColumnTypes& b) {
     a.Swap(&b);
@@ -4305,7 +4645,7 @@ class RenameTable final :
                &_RenameTable_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    19;
+    21;
 
   friend void swap(RenameTable& a, RenameTable& b) {
     a.Swap(&b);
@@ -4458,7 +4798,7 @@ class AddColumn final :
                &_AddColumn_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    20;
+    22;
 
   friend void swap(AddColumn& a, AddColumn& b) {
     a.Swap(&b);
@@ -4646,7 +4986,7 @@ class ModifyColumnType final :
                &_ModifyColumnType_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    21;
+    23;
 
   friend void swap(ModifyColumnType& a, ModifyColumnType& b) {
     a.Swap(&b);
@@ -4830,7 +5170,7 @@ class Option final :
                &_Option_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    22;
+    24;
 
   friend void swap(Option& a, Option& b) {
     a.Swap(&b);
@@ -4999,7 +5339,7 @@ class SetTableOptions final :
                &_SetTableOptions_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    23;
+    25;
 
   friend void swap(SetTableOptions& a, SetTableOptions& b) {
     a.Swap(&b);
@@ -5156,7 +5496,7 @@ class UnsetTableOptions final :
                &_UnsetTableOptions_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    24;
+    26;
 
   friend void swap(UnsetTableOptions& a, UnsetTableOptions& b) {
     a.Swap(&b);
@@ -5319,7 +5659,7 @@ class DropColumn final :
                &_DropColumn_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    25;
+    27;
 
   friend void swap(DropColumn& a, DropColumn& b) {
     a.Swap(&b);
@@ -5472,7 +5812,7 @@ class TableId final :
                &_TableId_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    26;
+    28;
 
   friend void swap(TableId& a, TableId& b) {
     a.Swap(&b);
@@ -5620,7 +5960,7 @@ class FlowId final :
                &_FlowId_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    27;
+    29;
 
   friend void swap(FlowId& a, FlowId& b) {
     a.Swap(&b);
@@ -5768,7 +6108,7 @@ class ColumnDef final :
                &_ColumnDef_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    28;
+    30;
 
   friend void swap(ColumnDef& a, ColumnDef& b) {
     a.Swap(&b);
@@ -6026,7 +6366,7 @@ class AddColumnLocation final :
                &_AddColumnLocation_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    29;
+    31;
 
   friend void swap(AddColumnLocation& a, AddColumnLocation& b) {
     a.Swap(&b);
@@ -6220,7 +6560,7 @@ class SetFulltext final :
                &_SetFulltext_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    30;
+    32;
 
   friend void swap(SetFulltext& a, SetFulltext& b) {
     a.Swap(&b);
@@ -6417,7 +6757,7 @@ class UnsetFulltext final :
                &_UnsetFulltext_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    31;
+    33;
 
   friend void swap(UnsetFulltext& a, UnsetFulltext& b) {
     a.Swap(&b);
@@ -6570,7 +6910,7 @@ class SetInverted final :
                &_SetInverted_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    32;
+    34;
 
   friend void swap(SetInverted& a, SetInverted& b) {
     a.Swap(&b);
@@ -6723,7 +7063,7 @@ class UnsetInverted final :
                &_UnsetInverted_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    33;
+    35;
 
   friend void swap(UnsetInverted& a, UnsetInverted& b) {
     a.Swap(&b);
@@ -6876,7 +7216,7 @@ class SetSkipping final :
                &_SetSkipping_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    34;
+    36;
 
   friend void swap(SetSkipping& a, SetSkipping& b) {
     a.Swap(&b);
@@ -7062,7 +7402,7 @@ class UnsetSkipping final :
                &_UnsetSkipping_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    35;
+    37;
 
   friend void swap(UnsetSkipping& a, UnsetSkipping& b) {
     a.Swap(&b);
@@ -7221,7 +7561,7 @@ class AlterDatabaseExpr final :
                &_AlterDatabaseExpr_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    36;
+    38;
 
   friend void swap(AlterDatabaseExpr& a, AlterDatabaseExpr& b) {
     a.Swap(&b);
@@ -7443,7 +7783,7 @@ class SetDatabaseOptions final :
                &_SetDatabaseOptions_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    37;
+    39;
 
   friend void swap(SetDatabaseOptions& a, SetDatabaseOptions& b) {
     a.Swap(&b);
@@ -7600,7 +7940,7 @@ class UnsetDatabaseOptions final :
                &_UnsetDatabaseOptions_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    38;
+    40;
 
   friend void swap(UnsetDatabaseOptions& a, UnsetDatabaseOptions& b) {
     a.Swap(&b);
@@ -7819,7 +8159,7 @@ class CreateTriggerExpr final :
                &_CreateTriggerExpr_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    41;
+    43;
 
   friend void swap(CreateTriggerExpr& a, CreateTriggerExpr& b) {
     a.Swap(&b);
@@ -8100,7 +8440,7 @@ class NotifyChannel final :
                &_NotifyChannel_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    42;
+    44;
 
   friend void swap(NotifyChannel& a, NotifyChannel& b) {
     a.Swap(&b);
@@ -8313,7 +8653,7 @@ class WebhookOptions final :
                &_WebhookOptions_default_instance_);
   }
   static constexpr int kIndexInFileMessages =
-    44;
+    46;
 
   friend void swap(WebhookOptions& a, WebhookOptions& b) {
     a.Swap(&b);
@@ -11949,6 +12289,80 @@ inline ::greptime::v1::UnsetIndex* AlterTableExpr::mutable_unset_index() {
   return _msg;
 }
 
+// .greptime.v1.DropDefaults drop_defaults = 14;
+inline bool AlterTableExpr::_internal_has_drop_defaults() const {
+  return kind_case() == kDropDefaults;
+}
+inline bool AlterTableExpr::has_drop_defaults() const {
+  return _internal_has_drop_defaults();
+}
+inline void AlterTableExpr::set_has_drop_defaults() {
+  _impl_._oneof_case_[0] = kDropDefaults;
+}
+inline void AlterTableExpr::clear_drop_defaults() {
+  if (_internal_has_drop_defaults()) {
+    if (GetArenaForAllocation() == nullptr) {
+      delete _impl_.kind_.drop_defaults_;
+    }
+    clear_has_kind();
+  }
+}
+inline ::greptime::v1::DropDefaults* AlterTableExpr::release_drop_defaults() {
+  // @@protoc_insertion_point(field_release:greptime.v1.AlterTableExpr.drop_defaults)
+  if (_internal_has_drop_defaults()) {
+    clear_has_kind();
+    ::greptime::v1::DropDefaults* temp = _impl_.kind_.drop_defaults_;
+    if (GetArenaForAllocation() != nullptr) {
+      temp = ::PROTOBUF_NAMESPACE_ID::internal::DuplicateIfNonNull(temp);
+    }
+    _impl_.kind_.drop_defaults_ = nullptr;
+    return temp;
+  } else {
+    return nullptr;
+  }
+}
+inline const ::greptime::v1::DropDefaults& AlterTableExpr::_internal_drop_defaults() const {
+  return _internal_has_drop_defaults()
+      ? *_impl_.kind_.drop_defaults_
+      : reinterpret_cast< ::greptime::v1::DropDefaults&>(::greptime::v1::_DropDefaults_default_instance_);
+}
+inline const ::greptime::v1::DropDefaults& AlterTableExpr::drop_defaults() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.AlterTableExpr.drop_defaults)
+  return _internal_drop_defaults();
+}
+inline ::greptime::v1::DropDefaults* AlterTableExpr::unsafe_arena_release_drop_defaults() {
+  // @@protoc_insertion_point(field_unsafe_arena_release:greptime.v1.AlterTableExpr.drop_defaults)
+  if (_internal_has_drop_defaults()) {
+    clear_has_kind();
+    ::greptime::v1::DropDefaults* temp = _impl_.kind_.drop_defaults_;
+    _impl_.kind_.drop_defaults_ = nullptr;
+    return temp;
+  } else {
+    return nullptr;
+  }
+}
+inline void AlterTableExpr::unsafe_arena_set_allocated_drop_defaults(::greptime::v1::DropDefaults* drop_defaults) {
+  clear_kind();
+  if (drop_defaults) {
+    set_has_drop_defaults();
+    _impl_.kind_.drop_defaults_ = drop_defaults;
+  }
+  // @@protoc_insertion_point(field_unsafe_arena_set_allocated:greptime.v1.AlterTableExpr.drop_defaults)
+}
+inline ::greptime::v1::DropDefaults* AlterTableExpr::_internal_mutable_drop_defaults() {
+  if (!_internal_has_drop_defaults()) {
+    clear_kind();
+    set_has_drop_defaults();
+    _impl_.kind_.drop_defaults_ = CreateMaybeMessage< ::greptime::v1::DropDefaults >(GetArenaForAllocation());
+  }
+  return _impl_.kind_.drop_defaults_;
+}
+inline ::greptime::v1::DropDefaults* AlterTableExpr::mutable_drop_defaults() {
+  ::greptime::v1::DropDefaults* _msg = _internal_mutable_drop_defaults();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.AlterTableExpr.drop_defaults)
+  return _msg;
+}
+
 inline bool AlterTableExpr::has_kind() const {
   return kind_case() != KIND_NOT_SET;
 }
@@ -11960,6 +12374,60 @@ inline AlterTableExpr::KindCase AlterTableExpr::kind_case() const {
 }
 // -------------------------------------------------------------------
 
+// DropDefault
+
+// string column_name = 1;
+inline void DropDefault::clear_column_name() {
+  _impl_.column_name_.ClearToEmpty();
+}
+inline const std::string& DropDefault::column_name() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.DropDefault.column_name)
+  return _internal_column_name();
+}
+template <typename ArgT0, typename... ArgT>
+inline PROTOBUF_ALWAYS_INLINE
+void DropDefault::set_column_name(ArgT0&& arg0, ArgT... args) {
+ 
+ _impl_.column_name_.Set(static_cast<ArgT0 &&>(arg0), args..., GetArenaForAllocation());
+  // @@protoc_insertion_point(field_set:greptime.v1.DropDefault.column_name)
+}
+inline std::string* DropDefault::mutable_column_name() {
+  std::string* _s = _internal_mutable_column_name();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.DropDefault.column_name)
+  return _s;
+}
+inline const std::string& DropDefault::_internal_column_name() const {
+  return _impl_.column_name_.Get();
+}
+inline void DropDefault::_internal_set_column_name(const std::string& value) {
+  
+  _impl_.column_name_.Set(value, GetArenaForAllocation());
+}
+inline std::string* DropDefault::_internal_mutable_column_name() {
+  
+  return _impl_.column_name_.Mutable(GetArenaForAllocation());
+}
+inline std::string* DropDefault::release_column_name() {
+  // @@protoc_insertion_point(field_release:greptime.v1.DropDefault.column_name)
+  return _impl_.column_name_.Release();
+}
+inline void DropDefault::set_allocated_column_name(std::string* column_name) {
+  if (column_name != nullptr) {
+    
+  } else {
+    
+  }
+  _impl_.column_name_.SetAllocated(column_name, GetArenaForAllocation());
+#ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  if (_impl_.column_name_.IsDefault()) {
+    _impl_.column_name_.Set("", GetArenaForAllocation());
+  }
+#endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.DropDefault.column_name)
+}
+
+// -------------------------------------------------------------------
+
 // SetIndex
 
 // .greptime.v1.SetFulltext fulltext = 1;
@@ -13261,6 +13729,50 @@ AddColumns::add_columns() const {
 
 // -------------------------------------------------------------------
 
+// DropDefaults
+
+// repeated .greptime.v1.DropDefault drop_defaults = 1;
+inline int DropDefaults::_internal_drop_defaults_size() const {
+  return _impl_.drop_defaults_.size();
+}
+inline int DropDefaults::drop_defaults_size() const {
+  return _internal_drop_defaults_size();
+}
+inline void DropDefaults::clear_drop_defaults() {
+  _impl_.drop_defaults_.Clear();
+}
+inline ::greptime::v1::DropDefault* DropDefaults::mutable_drop_defaults(int index) {
+  // @@protoc_insertion_point(field_mutable:greptime.v1.DropDefaults.drop_defaults)
+  return _impl_.drop_defaults_.Mutable(index);
+}
+inline ::PROTOBUF_NAMESPACE_ID::RepeatedPtrField< ::greptime::v1::DropDefault >*
+DropDefaults::mutable_drop_defaults() {
+  // @@protoc_insertion_point(field_mutable_list:greptime.v1.DropDefaults.drop_defaults)
+  return &_impl_.drop_defaults_;
+}
+inline const ::greptime::v1::DropDefault& DropDefaults::_internal_drop_defaults(int index) const {
+  return _impl_.drop_defaults_.Get(index);
+}
+inline const ::greptime::v1::DropDefault& DropDefaults::drop_defaults(int index) const {
+  // @@protoc_insertion_point(field_get:greptime.v1.DropDefaults.drop_defaults)
+  return _internal_drop_defaults(index);
+}
+inline ::greptime::v1::DropDefault* DropDefaults::_internal_add_drop_defaults() {
+  return _impl_.drop_defaults_.Add();
+}
+inline ::greptime::v1::DropDefault* DropDefaults::add_drop_defaults() {
+  ::greptime::v1::DropDefault* _add = _internal_add_drop_defaults();
+  // @@protoc_insertion_point(field_add:greptime.v1.DropDefaults.drop_defaults)
+  return _add;
+}
+inline const ::PROTOBUF_NAMESPACE_ID::RepeatedPtrField< ::greptime::v1::DropDefault >&
+DropDefaults::drop_defaults() const {
+  // @@protoc_insertion_point(field_list:greptime.v1.DropDefaults.drop_defaults)
+  return _impl_.drop_defaults_;
+}
+
+// -------------------------------------------------------------------
+
 // DropColumns
 
 // repeated .greptime.v1.DropColumn drop_columns = 1;
@@ -16008,6 +16520,10 @@ WebhookOptions::mutable_opts() {
 
 // -------------------------------------------------------------------
 
+// -------------------------------------------------------------------
+
+// -------------------------------------------------------------------
+
 
 // @@protoc_insertion_point(namespace_scope)
 

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

@@ -687,6 +687,7 @@ const uint32_t TableStruct_greptime_2fv1_2fregion_2fserver_2eproto::offsets[] PR
   ::_pbi::kInvalidFieldOffsetTag,
   ::_pbi::kInvalidFieldOffsetTag,
   ::_pbi::kInvalidFieldOffsetTag,
+  ::_pbi::kInvalidFieldOffsetTag,
   PROTOBUF_FIELD_OFFSET(::greptime::v1::region::AlterRequest, _impl_.schema_version_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::region::AlterRequest, _impl_.kind_),
   ~0u,  // no _has_bits_
@@ -819,20 +820,20 @@ static const ::_pbi::MigrationSchema schemas[] PROTOBUF_SECTION_VARIABLE(protode
   { 164, -1, -1, sizeof(::greptime::v1::region::CloseRequest)},
   { 171, -1, -1, sizeof(::greptime::v1::region::AlterRequests)},
   { 178, -1, -1, sizeof(::greptime::v1::region::AlterRequest)},
-  { 194, -1, -1, sizeof(::greptime::v1::region::AddColumns)},
+  { 195, -1, -1, sizeof(::greptime::v1::region::AddColumns)},
-  { 201, -1, -1, sizeof(::greptime::v1::region::DropColumns)},
+  { 202, -1, -1, sizeof(::greptime::v1::region::DropColumns)},
-  { 208, -1, -1, sizeof(::greptime::v1::region::AddColumn)},
+  { 209, -1, -1, sizeof(::greptime::v1::region::AddColumn)},
-  { 216, -1, -1, sizeof(::greptime::v1::region::DropColumn)},
+  { 217, -1, -1, sizeof(::greptime::v1::region::DropColumn)},
-  { 223, -1, -1, sizeof(::greptime::v1::region::FlushRequest)},
+  { 224, -1, -1, sizeof(::greptime::v1::region::FlushRequest)},
-  { 230, -1, -1, sizeof(::greptime::v1::region::Regular)},
+  { 231, -1, -1, sizeof(::greptime::v1::region::Regular)},
-  { 236, -1, -1, sizeof(::greptime::v1::region::StrictWindow)},
+  { 237, -1, -1, sizeof(::greptime::v1::region::StrictWindow)},
-  { 243, -1, -1, sizeof(::greptime::v1::region::CompactRequest)},
+  { 244, -1, -1, sizeof(::greptime::v1::region::CompactRequest)},
-  { 253, -1, -1, sizeof(::greptime::v1::region::TruncateRequest)},
+  { 254, -1, -1, sizeof(::greptime::v1::region::TruncateRequest)},
-  { 260, -1, -1, sizeof(::greptime::v1::region::RegionColumnDef)},
+  { 261, -1, -1, sizeof(::greptime::v1::region::RegionColumnDef)},
-  { 268, -1, -1, sizeof(::greptime::v1::region::BulkInsertRequest)},
+  { 269, -1, -1, sizeof(::greptime::v1::region::BulkInsertRequest)},
-  { 277, -1, -1, sizeof(::greptime::v1::region::MitoManifestInfo)},
+  { 278, -1, -1, sizeof(::greptime::v1::region::MitoManifestInfo)},
-  { 284, -1, -1, sizeof(::greptime::v1::region::MetricManifestInfo)},
+  { 285, -1, -1, sizeof(::greptime::v1::region::MetricManifestInfo)},
-  { 292, -1, -1, sizeof(::greptime::v1::region::SyncRequest)},
+  { 293, -1, -1, sizeof(::greptime::v1::region::SyncRequest)},
 };
 
 static const ::_pb::Message* const file_default_instances[] = {
@@ -937,7 +938,7 @@ const char descriptor_table_protodef_greptime_2fv1_2fregion_2fserver_2eproto[] P
   "\n\005value\030\002 \001(\t:\0028\001\"!\n\014CloseRequest\022\021\n\treg"
   "ion_id\030\001 \001(\004\"C\n\rAlterRequests\0222\n\010request"
   "s\030\001 \003(\0132 .greptime.v1.region.AlterReques"
-  "t\"\306\003\n\014AlterRequest\022\021\n\tregion_id\030\001 \001(\004\0225\n"
+  "t\"\372\003\n\014AlterRequest\022\021\n\tregion_id\030\001 \001(\004\0225\n"
   "\013add_columns\030\002 \001(\0132\036.greptime.v1.region."
   "AddColumnsH\000\0227\n\014drop_columns\030\003 \001(\0132\037.gre"
   "ptime.v1.region.DropColumnsH\000\022=\n\023modify_"
@@ -947,39 +948,41 @@ const char descriptor_table_protodef_greptime_2fv1_2fregion_2fserver_2eproto[] P
   "_table_options\030\t \001(\0132\036.greptime.v1.Unset"
   "TableOptionsH\000\022*\n\tset_index\030\n \001(\0132\025.grep"
   "time.v1.SetIndexH\000\022.\n\013unset_index\030\013 \001(\0132"
-  "\027.greptime.v1.UnsetIndexH\000\022\026\n\016schema_ver"
+  "\027.greptime.v1.UnsetIndexH\000\0222\n\rdrop_defau"
-  "sion\030\004 \001(\004B\006\n\004kind\"@\n\nAddColumns\0222\n\013add_"
+  "lts\030\014 \001(\0132\031.greptime.v1.DropDefaultsH\000\022\026"
-  "columns\030\001 \003(\0132\035.greptime.v1.region.AddCo"
+  "\n\016schema_version\030\004 \001(\004B\006\n\004kind\"@\n\nAddCol"
-  "lumn\"C\n\013DropColumns\0224\n\014drop_columns\030\001 \003("
+  "umns\0222\n\013add_columns\030\001 \003(\0132\035.greptime.v1."
-  "\0132\036.greptime.v1.region.DropColumn\"v\n\tAdd"
+  "region.AddColumn\"C\n\013DropColumns\0224\n\014drop_"
-  "Column\0227\n\ncolumn_def\030\001 \001(\0132#.greptime.v1"
+  "columns\030\001 \003(\0132\036.greptime.v1.region.DropC"
-  ".region.RegionColumnDef\0220\n\010location\030\003 \001("
+  "olumn\"v\n\tAddColumn\0227\n\ncolumn_def\030\001 \001(\0132#"
-  "\0132\036.greptime.v1.AddColumnLocation\"\032\n\nDro"
+  ".greptime.v1.region.RegionColumnDef\0220\n\010l"
-  "pColumn\022\014\n\004name\030\001 \001(\t\"!\n\014FlushRequest\022\021\n"
+  "ocation\030\003 \001(\0132\036.greptime.v1.AddColumnLoc"
-  "\tregion_id\030\001 \001(\004\"\t\n\007Regular\"&\n\014StrictWin"
+  "ation\"\032\n\nDropColumn\022\014\n\004name\030\001 \001(\t\"!\n\014Flu"
-  "dow\022\026\n\016window_seconds\030\001 \001(\003\"\231\001\n\016CompactR"
+  "shRequest\022\021\n\tregion_id\030\001 \001(\004\"\t\n\007Regular\""
-  "equest\022\021\n\tregion_id\030\001 \001(\004\022.\n\007regular\030\002 \001"
+  "&\n\014StrictWindow\022\026\n\016window_seconds\030\001 \001(\003\""
-  "(\0132\033.greptime.v1.region.RegularH\000\0229\n\rstr"
+  "\231\001\n\016CompactRequest\022\021\n\tregion_id\030\001 \001(\004\022.\n"
-  "ict_window\030\003 \001(\0132 .greptime.v1.region.St"
+  "\007regular\030\002 \001(\0132\033.greptime.v1.region.Regu"
-  "rictWindowH\000B\t\n\007options\"$\n\017TruncateReque"
+  "larH\000\0229\n\rstrict_window\030\003 \001(\0132 .greptime."
-  "st\022\021\n\tregion_id\030\001 \001(\004\"P\n\017RegionColumnDef"
+  "v1.region.StrictWindowH\000B\t\n\007options\"$\n\017T"
-  "\022*\n\ncolumn_def\030\001 \001(\0132\026.greptime.v1.Colum"
+  "runcateRequest\022\021\n\tregion_id\030\001 \001(\004\"P\n\017Reg"
-  "nDef\022\021\n\tcolumn_id\030\002 \001(\r\"Z\n\021BulkInsertReq"
+  "ionColumnDef\022*\n\ncolumn_def\030\001 \001(\0132\026.grept"
-  "uest\022\021\n\tregion_id\030\001 \001(\004\022*\n\tarrow_ipc\030\002 \001"
+  "ime.v1.ColumnDef\022\021\n\tcolumn_id\030\002 \001(\r\"Z\n\021B"
-  "(\0132\025.greptime.v1.ArrowIpcH\000B\006\n\004body\"1\n\020M"
+  "ulkInsertRequest\022\021\n\tregion_id\030\001 \001(\004\022*\n\ta"
-  "itoManifestInfo\022\035\n\025data_manifest_version"
+  "rrow_ipc\030\002 \001(\0132\025.greptime.v1.ArrowIpcH\000B"
-  "\030\001 \001(\004\"V\n\022MetricManifestInfo\022\035\n\025data_man"
+  "\006\n\004body\"1\n\020MitoManifestInfo\022\035\n\025data_mani"
-  "ifest_version\030\001 \001(\004\022!\n\031metadata_manifest"
+  "fest_version\030\001 \001(\004\"V\n\022MetricManifestInfo"
-  "_version\030\002 \001(\004\"\275\001\n\013SyncRequest\022\021\n\tregion"
+  "\022\035\n\025data_manifest_version\030\001 \001(\004\022!\n\031metad"
-  "_id\030\001 \001(\004\022B\n\022mito_manifest_info\030\002 \001(\0132$."
+  "ata_manifest_version\030\002 \001(\004\"\275\001\n\013SyncReque"
-  "greptime.v1.region.MitoManifestInfoH\000\022F\n"
+  "st\022\021\n\tregion_id\030\001 \001(\004\022B\n\022mito_manifest_i"
-  "\024metric_manifest_info\030\003 \001(\0132&.greptime.v"
+  "nfo\030\002 \001(\0132$.greptime.v1.region.MitoManif"
-  "1.region.MetricManifestInfoH\000B\017\n\rmanifes"
+  "estInfoH\000\022F\n\024metric_manifest_info\030\003 \001(\0132"
-  "t_info2Y\n\006Region\022O\n\006Handle\022!.greptime.v1"
+  "&.greptime.v1.region.MetricManifestInfoH"
-  ".region.RegionRequest\032\".greptime.v1.regi"
+  "\000B\017\n\rmanifest_info2Y\n\006Region\022O\n\006Handle\022!"
-  "on.RegionResponseB]\n\025io.greptime.v1.regi"
+  ".greptime.v1.region.RegionRequest\032\".grep"
-  "onB\006ServerZ<github.com/GreptimeTeam/grep"
+  "time.v1.region.RegionResponseB]\n\025io.grep"
-  "time-proto/go/greptime/v1/regionb\006proto3"
+  "time.v1.regionB\006ServerZ<github.com/Grept"
+  "imeTeam/greptime-proto/go/greptime/v1/re"
+  "gionb\006proto3"
   ;
 static const ::_pbi::DescriptorTable* const descriptor_table_greptime_2fv1_2fregion_2fserver_2eproto_deps[3] = {
   &::descriptor_table_greptime_2fv1_2fcommon_2eproto,
@@ -988,7 +991,7 @@ static const ::_pbi::DescriptorTable* const descriptor_table_greptime_2fv1_2freg
 };
 static ::_pbi::once_flag descriptor_table_greptime_2fv1_2fregion_2fserver_2eproto_once;
 const ::_pbi::DescriptorTable descriptor_table_greptime_2fv1_2fregion_2fserver_2eproto = {
-    false, false, 4280, descriptor_table_protodef_greptime_2fv1_2fregion_2fserver_2eproto,
+    false, false, 4332, descriptor_table_protodef_greptime_2fv1_2fregion_2fserver_2eproto,
     "greptime/v1/region/server.proto",
     &descriptor_table_greptime_2fv1_2fregion_2fserver_2eproto_once, descriptor_table_greptime_2fv1_2fregion_2fserver_2eproto_deps, 3, 34,
     schemas, file_default_instances, TableStruct_greptime_2fv1_2fregion_2fserver_2eproto::offsets,
@@ -5603,6 +5606,7 @@ class AlterRequest::_Internal {
   static const ::greptime::v1::UnsetTableOptions& unset_table_options(const AlterRequest* msg);
   static const ::greptime::v1::SetIndex& set_index(const AlterRequest* msg);
   static const ::greptime::v1::UnsetIndex& unset_index(const AlterRequest* msg);
+  static const ::greptime::v1::DropDefaults& drop_defaults(const AlterRequest* msg);
 };
 
 const ::greptime::v1::region::AddColumns&
@@ -5633,6 +5637,10 @@ const ::greptime::v1::UnsetIndex&
 AlterRequest::_Internal::unset_index(const AlterRequest* msg) {
   return *msg->_impl_.kind_.unset_index_;
 }
+const ::greptime::v1::DropDefaults&
+AlterRequest::_Internal::drop_defaults(const AlterRequest* msg) {
+  return *msg->_impl_.kind_.drop_defaults_;
+}
 void AlterRequest::set_allocated_add_columns(::greptime::v1::region::AddColumns* add_columns) {
   ::PROTOBUF_NAMESPACE_ID::Arena* message_arena = GetArenaForAllocation();
   clear_kind();
@@ -5783,6 +5791,30 @@ void AlterRequest::clear_unset_index() {
     clear_has_kind();
   }
 }
+void AlterRequest::set_allocated_drop_defaults(::greptime::v1::DropDefaults* drop_defaults) {
+  ::PROTOBUF_NAMESPACE_ID::Arena* message_arena = GetArenaForAllocation();
+  clear_kind();
+  if (drop_defaults) {
+    ::PROTOBUF_NAMESPACE_ID::Arena* submessage_arena =
+        ::PROTOBUF_NAMESPACE_ID::Arena::InternalGetOwningArena(
+                reinterpret_cast<::PROTOBUF_NAMESPACE_ID::MessageLite*>(drop_defaults));
+    if (message_arena != submessage_arena) {
+      drop_defaults = ::PROTOBUF_NAMESPACE_ID::internal::GetOwnedMessage(
+          message_arena, drop_defaults, submessage_arena);
+    }
+    set_has_drop_defaults();
+    _impl_.kind_.drop_defaults_ = drop_defaults;
+  }
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.region.AlterRequest.drop_defaults)
+}
+void AlterRequest::clear_drop_defaults() {
+  if (_internal_has_drop_defaults()) {
+    if (GetArenaForAllocation() == nullptr) {
+      delete _impl_.kind_.drop_defaults_;
+    }
+    clear_has_kind();
+  }
+}
 AlterRequest::AlterRequest(::PROTOBUF_NAMESPACE_ID::Arena* arena,
                          bool is_message_owned)
   : ::PROTOBUF_NAMESPACE_ID::Message(arena, is_message_owned) {
@@ -5840,6 +5872,11 @@ AlterRequest::AlterRequest(const AlterRequest& from)
           from._internal_unset_index());
       break;
     }
+    case kDropDefaults: {
+      _this->_internal_mutable_drop_defaults()->::greptime::v1::DropDefaults::MergeFrom(
+          from._internal_drop_defaults());
+      break;
+    }
     case KIND_NOT_SET: {
       break;
     }
@@ -5926,6 +5963,12 @@ void AlterRequest::clear_kind() {
       }
       break;
     }
+    case kDropDefaults: {
+      if (GetArenaForAllocation() == nullptr) {
+        delete _impl_.kind_.drop_defaults_;
+      }
+      break;
+    }
     case KIND_NOT_SET: {
       break;
     }
@@ -6025,6 +6068,14 @@ const char* AlterRequest::_InternalParse(const char* ptr, ::_pbi::ParseContext*
         } else
           goto handle_unusual;
         continue;
+      // .greptime.v1.DropDefaults drop_defaults = 12;
+      case 12:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 98)) {
+          ptr = ctx->ParseMessage(_internal_mutable_drop_defaults(), ptr);
+          CHK_(ptr);
+        } else
+          goto handle_unusual;
+        continue;
       default:
         goto handle_unusual;
     }  // switch
@@ -6115,6 +6166,13 @@ uint8_t* AlterRequest::_InternalSerialize(
         _Internal::unset_index(this).GetCachedSize(), target, stream);
   }
 
+  // .greptime.v1.DropDefaults drop_defaults = 12;
+  if (_internal_has_drop_defaults()) {
+    target = ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::
+      InternalWriteMessage(12, _Internal::drop_defaults(this),
+        _Internal::drop_defaults(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);
@@ -6191,6 +6249,13 @@ size_t AlterRequest::ByteSizeLong() const {
           *_impl_.kind_.unset_index_);
       break;
     }
+    // .greptime.v1.DropDefaults drop_defaults = 12;
+    case kDropDefaults: {
+      total_size += 1 +
+        ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::MessageSize(
+          *_impl_.kind_.drop_defaults_);
+      break;
+    }
     case KIND_NOT_SET: {
       break;
     }
@@ -6255,6 +6320,11 @@ void AlterRequest::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::P
           from._internal_unset_index());
       break;
     }
+    case kDropDefaults: {
+      _this->_internal_mutable_drop_defaults()->::greptime::v1::DropDefaults::MergeFrom(
+          from._internal_drop_defaults());
+      break;
+    }
     case KIND_NOT_SET: {
       break;
     }

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

@@ -3326,6 +3326,7 @@ class AlterRequest final :
     kUnsetTableOptions = 9,
     kSetIndex = 10,
     kUnsetIndex = 11,
+    kDropDefaults = 12,
     KIND_NOT_SET = 0,
   };
 
@@ -3416,6 +3417,7 @@ class AlterRequest final :
     kUnsetTableOptionsFieldNumber = 9,
     kSetIndexFieldNumber = 10,
     kUnsetIndexFieldNumber = 11,
+    kDropDefaultsFieldNumber = 12,
   };
   // uint64 region_id = 1;
   void clear_region_id();
@@ -3561,6 +3563,24 @@ class AlterRequest final :
       ::greptime::v1::UnsetIndex* unset_index);
   ::greptime::v1::UnsetIndex* unsafe_arena_release_unset_index();
 
+  // .greptime.v1.DropDefaults drop_defaults = 12;
+  bool has_drop_defaults() const;
+  private:
+  bool _internal_has_drop_defaults() const;
+  public:
+  void clear_drop_defaults();
+  const ::greptime::v1::DropDefaults& drop_defaults() const;
+  PROTOBUF_NODISCARD ::greptime::v1::DropDefaults* release_drop_defaults();
+  ::greptime::v1::DropDefaults* mutable_drop_defaults();
+  void set_allocated_drop_defaults(::greptime::v1::DropDefaults* drop_defaults);
+  private:
+  const ::greptime::v1::DropDefaults& _internal_drop_defaults() const;
+  ::greptime::v1::DropDefaults* _internal_mutable_drop_defaults();
+  public:
+  void unsafe_arena_set_allocated_drop_defaults(
+      ::greptime::v1::DropDefaults* drop_defaults);
+  ::greptime::v1::DropDefaults* unsafe_arena_release_drop_defaults();
+
   void clear_kind();
   KindCase kind_case() const;
   // @@protoc_insertion_point(class_scope:greptime.v1.region.AlterRequest)
@@ -3573,6 +3593,7 @@ class AlterRequest final :
   void set_has_unset_table_options();
   void set_has_set_index();
   void set_has_unset_index();
+  void set_has_drop_defaults();
 
   inline bool has_kind() const;
   inline void clear_has_kind();
@@ -3593,6 +3614,7 @@ class AlterRequest final :
       ::greptime::v1::UnsetTableOptions* unset_table_options_;
       ::greptime::v1::SetIndex* set_index_;
       ::greptime::v1::UnsetIndex* unset_index_;
+      ::greptime::v1::DropDefaults* drop_defaults_;
     } kind_;
     mutable ::PROTOBUF_NAMESPACE_ID::internal::CachedSize _cached_size_;
     uint32_t _oneof_case_[1];
@@ -8980,6 +9002,72 @@ inline ::greptime::v1::UnsetIndex* AlterRequest::mutable_unset_index() {
   return _msg;
 }
 
+// .greptime.v1.DropDefaults drop_defaults = 12;
+inline bool AlterRequest::_internal_has_drop_defaults() const {
+  return kind_case() == kDropDefaults;
+}
+inline bool AlterRequest::has_drop_defaults() const {
+  return _internal_has_drop_defaults();
+}
+inline void AlterRequest::set_has_drop_defaults() {
+  _impl_._oneof_case_[0] = kDropDefaults;
+}
+inline ::greptime::v1::DropDefaults* AlterRequest::release_drop_defaults() {
+  // @@protoc_insertion_point(field_release:greptime.v1.region.AlterRequest.drop_defaults)
+  if (_internal_has_drop_defaults()) {
+    clear_has_kind();
+    ::greptime::v1::DropDefaults* temp = _impl_.kind_.drop_defaults_;
+    if (GetArenaForAllocation() != nullptr) {
+      temp = ::PROTOBUF_NAMESPACE_ID::internal::DuplicateIfNonNull(temp);
+    }
+    _impl_.kind_.drop_defaults_ = nullptr;
+    return temp;
+  } else {
+    return nullptr;
+  }
+}
+inline const ::greptime::v1::DropDefaults& AlterRequest::_internal_drop_defaults() const {
+  return _internal_has_drop_defaults()
+      ? *_impl_.kind_.drop_defaults_
+      : reinterpret_cast< ::greptime::v1::DropDefaults&>(::greptime::v1::_DropDefaults_default_instance_);
+}
+inline const ::greptime::v1::DropDefaults& AlterRequest::drop_defaults() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.region.AlterRequest.drop_defaults)
+  return _internal_drop_defaults();
+}
+inline ::greptime::v1::DropDefaults* AlterRequest::unsafe_arena_release_drop_defaults() {
+  // @@protoc_insertion_point(field_unsafe_arena_release:greptime.v1.region.AlterRequest.drop_defaults)
+  if (_internal_has_drop_defaults()) {
+    clear_has_kind();
+    ::greptime::v1::DropDefaults* temp = _impl_.kind_.drop_defaults_;
+    _impl_.kind_.drop_defaults_ = nullptr;
+    return temp;
+  } else {
+    return nullptr;
+  }
+}
+inline void AlterRequest::unsafe_arena_set_allocated_drop_defaults(::greptime::v1::DropDefaults* drop_defaults) {
+  clear_kind();
+  if (drop_defaults) {
+    set_has_drop_defaults();
+    _impl_.kind_.drop_defaults_ = drop_defaults;
+  }
+  // @@protoc_insertion_point(field_unsafe_arena_set_allocated:greptime.v1.region.AlterRequest.drop_defaults)
+}
+inline ::greptime::v1::DropDefaults* AlterRequest::_internal_mutable_drop_defaults() {
+  if (!_internal_has_drop_defaults()) {
+    clear_kind();
+    set_has_drop_defaults();
+    _impl_.kind_.drop_defaults_ = CreateMaybeMessage< ::greptime::v1::DropDefaults >(GetArenaForAllocation());
+  }
+  return _impl_.kind_.drop_defaults_;
+}
+inline ::greptime::v1::DropDefaults* AlterRequest::mutable_drop_defaults() {
+  ::greptime::v1::DropDefaults* _msg = _internal_mutable_drop_defaults();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.region.AlterRequest.drop_defaults)
+  return _msg;
+}
+
 // uint64 schema_version = 4;
 inline void AlterRequest::clear_schema_version() {
   _impl_.schema_version_ = uint64_t{0u};

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

@@ -17054,6 +17054,21 @@ java.lang.String defaultValue);
      */
     io.greptime.v1.Ddl.UnsetIndexOrBuilder getUnsetIndexOrBuilder();
 
+    /**
+     * <code>.greptime.v1.DropDefaults drop_defaults = 12;</code>
+     * @return Whether the dropDefaults field is set.
+     */
+    boolean hasDropDefaults();
+    /**
+     * <code>.greptime.v1.DropDefaults drop_defaults = 12;</code>
+     * @return The dropDefaults.
+     */
+    io.greptime.v1.Ddl.DropDefaults getDropDefaults();
+    /**
+     * <code>.greptime.v1.DropDefaults drop_defaults = 12;</code>
+     */
+    io.greptime.v1.Ddl.DropDefaultsOrBuilder getDropDefaultsOrBuilder();
+
     /**
      * <pre>
      * The version of the schema before applying the alteration.
@@ -17219,6 +17234,20 @@ java.lang.String defaultValue);
               kindCase_ = 11;
               break;
             }
+            case 98: {
+              io.greptime.v1.Ddl.DropDefaults.Builder subBuilder = null;
+              if (kindCase_ == 12) {
+                subBuilder = ((io.greptime.v1.Ddl.DropDefaults) kind_).toBuilder();
+              }
+              kind_ =
+                  input.readMessage(io.greptime.v1.Ddl.DropDefaults.parser(), extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom((io.greptime.v1.Ddl.DropDefaults) kind_);
+                kind_ = subBuilder.buildPartial();
+              }
+              kindCase_ = 12;
+              break;
+            }
             default: {
               if (!parseUnknownField(
                   input, unknownFields, extensionRegistry, tag)) {
@@ -17265,6 +17294,7 @@ java.lang.String defaultValue);
       UNSET_TABLE_OPTIONS(9),
       SET_INDEX(10),
       UNSET_INDEX(11),
+      DROP_DEFAULTS(12),
       KIND_NOT_SET(0);
       private final int value;
       private KindCase(int value) {
@@ -17289,6 +17319,7 @@ java.lang.String defaultValue);
           case 9: return UNSET_TABLE_OPTIONS;
           case 10: return SET_INDEX;
           case 11: return UNSET_INDEX;
+          case 12: return DROP_DEFAULTS;
           case 0: return KIND_NOT_SET;
           default: return null;
         }
@@ -17532,6 +17563,37 @@ java.lang.String defaultValue);
       return io.greptime.v1.Ddl.UnsetIndex.getDefaultInstance();
     }
 
+    public static final int DROP_DEFAULTS_FIELD_NUMBER = 12;
+    /**
+     * <code>.greptime.v1.DropDefaults drop_defaults = 12;</code>
+     * @return Whether the dropDefaults field is set.
+     */
+    @java.lang.Override
+    public boolean hasDropDefaults() {
+      return kindCase_ == 12;
+    }
+    /**
+     * <code>.greptime.v1.DropDefaults drop_defaults = 12;</code>
+     * @return The dropDefaults.
+     */
+    @java.lang.Override
+    public io.greptime.v1.Ddl.DropDefaults getDropDefaults() {
+      if (kindCase_ == 12) {
+         return (io.greptime.v1.Ddl.DropDefaults) kind_;
+      }
+      return io.greptime.v1.Ddl.DropDefaults.getDefaultInstance();
+    }
+    /**
+     * <code>.greptime.v1.DropDefaults drop_defaults = 12;</code>
+     */
+    @java.lang.Override
+    public io.greptime.v1.Ddl.DropDefaultsOrBuilder getDropDefaultsOrBuilder() {
+      if (kindCase_ == 12) {
+         return (io.greptime.v1.Ddl.DropDefaults) kind_;
+      }
+      return io.greptime.v1.Ddl.DropDefaults.getDefaultInstance();
+    }
+
     public static final int SCHEMA_VERSION_FIELD_NUMBER = 4;
     private long schemaVersion_;
     /**
@@ -17588,6 +17650,9 @@ java.lang.String defaultValue);
       if (kindCase_ == 11) {
         output.writeMessage(11, (io.greptime.v1.Ddl.UnsetIndex) kind_);
       }
+      if (kindCase_ == 12) {
+        output.writeMessage(12, (io.greptime.v1.Ddl.DropDefaults) kind_);
+      }
       unknownFields.writeTo(output);
     }
 
@@ -17633,6 +17698,10 @@ java.lang.String defaultValue);
         size += com.google.protobuf.CodedOutputStream
           .computeMessageSize(11, (io.greptime.v1.Ddl.UnsetIndex) kind_);
       }
+      if (kindCase_ == 12) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeMessageSize(12, (io.greptime.v1.Ddl.DropDefaults) kind_);
+      }
       size += unknownFields.getSerializedSize();
       memoizedSize = size;
       return size;
@@ -17682,6 +17751,10 @@ java.lang.String defaultValue);
           if (!getUnsetIndex()
               .equals(other.getUnsetIndex())) return false;
           break;
+        case 12:
+          if (!getDropDefaults()
+              .equals(other.getDropDefaults())) return false;
+          break;
         case 0:
         default:
       }
@@ -17731,6 +17804,10 @@ java.lang.String defaultValue);
           hash = (37 * hash) + UNSET_INDEX_FIELD_NUMBER;
           hash = (53 * hash) + getUnsetIndex().hashCode();
           break;
+        case 12:
+          hash = (37 * hash) + DROP_DEFAULTS_FIELD_NUMBER;
+          hash = (53 * hash) + getDropDefaults().hashCode();
+          break;
         case 0:
         default:
       }
@@ -17949,6 +18026,13 @@ java.lang.String defaultValue);
             result.kind_ = unsetIndexBuilder_.build();
           }
         }
+        if (kindCase_ == 12) {
+          if (dropDefaultsBuilder_ == null) {
+            result.kind_ = kind_;
+          } else {
+            result.kind_ = dropDefaultsBuilder_.build();
+          }
+        }
         result.schemaVersion_ = schemaVersion_;
         result.kindCase_ = kindCase_;
         onBuilt();
@@ -18034,6 +18118,10 @@ java.lang.String defaultValue);
             mergeUnsetIndex(other.getUnsetIndex());
             break;
           }
+          case DROP_DEFAULTS: {
+            mergeDropDefaults(other.getDropDefaults());
+            break;
+          }
           case KIND_NOT_SET: {
             break;
           }
@@ -19107,6 +19195,148 @@ java.lang.String defaultValue);
         return unsetIndexBuilder_;
       }
 
+      private com.google.protobuf.SingleFieldBuilderV3<
+          io.greptime.v1.Ddl.DropDefaults, io.greptime.v1.Ddl.DropDefaults.Builder, io.greptime.v1.Ddl.DropDefaultsOrBuilder> dropDefaultsBuilder_;
+      /**
+       * <code>.greptime.v1.DropDefaults drop_defaults = 12;</code>
+       * @return Whether the dropDefaults field is set.
+       */
+      @java.lang.Override
+      public boolean hasDropDefaults() {
+        return kindCase_ == 12;
+      }
+      /**
+       * <code>.greptime.v1.DropDefaults drop_defaults = 12;</code>
+       * @return The dropDefaults.
+       */
+      @java.lang.Override
+      public io.greptime.v1.Ddl.DropDefaults getDropDefaults() {
+        if (dropDefaultsBuilder_ == null) {
+          if (kindCase_ == 12) {
+            return (io.greptime.v1.Ddl.DropDefaults) kind_;
+          }
+          return io.greptime.v1.Ddl.DropDefaults.getDefaultInstance();
+        } else {
+          if (kindCase_ == 12) {
+            return dropDefaultsBuilder_.getMessage();
+          }
+          return io.greptime.v1.Ddl.DropDefaults.getDefaultInstance();
+        }
+      }
+      /**
+       * <code>.greptime.v1.DropDefaults drop_defaults = 12;</code>
+       */
+      public Builder setDropDefaults(io.greptime.v1.Ddl.DropDefaults value) {
+        if (dropDefaultsBuilder_ == null) {
+          if (value == null) {
+            throw new NullPointerException();
+          }
+          kind_ = value;
+          onChanged();
+        } else {
+          dropDefaultsBuilder_.setMessage(value);
+        }
+        kindCase_ = 12;
+        return this;
+      }
+      /**
+       * <code>.greptime.v1.DropDefaults drop_defaults = 12;</code>
+       */
+      public Builder setDropDefaults(
+          io.greptime.v1.Ddl.DropDefaults.Builder builderForValue) {
+        if (dropDefaultsBuilder_ == null) {
+          kind_ = builderForValue.build();
+          onChanged();
+        } else {
+          dropDefaultsBuilder_.setMessage(builderForValue.build());
+        }
+        kindCase_ = 12;
+        return this;
+      }
+      /**
+       * <code>.greptime.v1.DropDefaults drop_defaults = 12;</code>
+       */
+      public Builder mergeDropDefaults(io.greptime.v1.Ddl.DropDefaults value) {
+        if (dropDefaultsBuilder_ == null) {
+          if (kindCase_ == 12 &&
+              kind_ != io.greptime.v1.Ddl.DropDefaults.getDefaultInstance()) {
+            kind_ = io.greptime.v1.Ddl.DropDefaults.newBuilder((io.greptime.v1.Ddl.DropDefaults) kind_)
+                .mergeFrom(value).buildPartial();
+          } else {
+            kind_ = value;
+          }
+          onChanged();
+        } else {
+          if (kindCase_ == 12) {
+            dropDefaultsBuilder_.mergeFrom(value);
+          } else {
+            dropDefaultsBuilder_.setMessage(value);
+          }
+        }
+        kindCase_ = 12;
+        return this;
+      }
+      /**
+       * <code>.greptime.v1.DropDefaults drop_defaults = 12;</code>
+       */
+      public Builder clearDropDefaults() {
+        if (dropDefaultsBuilder_ == null) {
+          if (kindCase_ == 12) {
+            kindCase_ = 0;
+            kind_ = null;
+            onChanged();
+          }
+        } else {
+          if (kindCase_ == 12) {
+            kindCase_ = 0;
+            kind_ = null;
+          }
+          dropDefaultsBuilder_.clear();
+        }
+        return this;
+      }
+      /**
+       * <code>.greptime.v1.DropDefaults drop_defaults = 12;</code>
+       */
+      public io.greptime.v1.Ddl.DropDefaults.Builder getDropDefaultsBuilder() {
+        return getDropDefaultsFieldBuilder().getBuilder();
+      }
+      /**
+       * <code>.greptime.v1.DropDefaults drop_defaults = 12;</code>
+       */
+      @java.lang.Override
+      public io.greptime.v1.Ddl.DropDefaultsOrBuilder getDropDefaultsOrBuilder() {
+        if ((kindCase_ == 12) && (dropDefaultsBuilder_ != null)) {
+          return dropDefaultsBuilder_.getMessageOrBuilder();
+        } else {
+          if (kindCase_ == 12) {
+            return (io.greptime.v1.Ddl.DropDefaults) kind_;
+          }
+          return io.greptime.v1.Ddl.DropDefaults.getDefaultInstance();
+        }
+      }
+      /**
+       * <code>.greptime.v1.DropDefaults drop_defaults = 12;</code>
+       */
+      private com.google.protobuf.SingleFieldBuilderV3<
+          io.greptime.v1.Ddl.DropDefaults, io.greptime.v1.Ddl.DropDefaults.Builder, io.greptime.v1.Ddl.DropDefaultsOrBuilder> 
+          getDropDefaultsFieldBuilder() {
+        if (dropDefaultsBuilder_ == null) {
+          if (!(kindCase_ == 12)) {
+            kind_ = io.greptime.v1.Ddl.DropDefaults.getDefaultInstance();
+          }
+          dropDefaultsBuilder_ = new com.google.protobuf.SingleFieldBuilderV3<
+              io.greptime.v1.Ddl.DropDefaults, io.greptime.v1.Ddl.DropDefaults.Builder, io.greptime.v1.Ddl.DropDefaultsOrBuilder>(
+                  (io.greptime.v1.Ddl.DropDefaults) kind_,
+                  getParentForChildren(),
+                  isClean());
+          kind_ = null;
+        }
+        kindCase_ = 12;
+        onChanged();;
+        return dropDefaultsBuilder_;
+      }
+
       private long schemaVersion_ ;
       /**
        * <pre>
@@ -28968,7 +29198,7 @@ java.lang.String defaultValue);
       "\n\005value\030\002 \001(\t:\0028\001\"!\n\014CloseRequest\022\021\n\treg" +
       "ion_id\030\001 \001(\004\"C\n\rAlterRequests\0222\n\010request" +
       "s\030\001 \003(\0132 .greptime.v1.region.AlterReques" +
-      "t\"\306\003\n\014AlterRequest\022\021\n\tregion_id\030\001 \001(\004\0225\n" +
+      "t\"\372\003\n\014AlterRequest\022\021\n\tregion_id\030\001 \001(\004\0225\n" +
       "\013add_columns\030\002 \001(\0132\036.greptime.v1.region." +
       "AddColumnsH\000\0227\n\014drop_columns\030\003 \001(\0132\037.gre" +
       "ptime.v1.region.DropColumnsH\000\022=\n\023modify_" +
@@ -28978,39 +29208,41 @@ java.lang.String defaultValue);
       "_table_options\030\t \001(\0132\036.greptime.v1.Unset" +
       "TableOptionsH\000\022*\n\tset_index\030\n \001(\0132\025.grep" +
       "time.v1.SetIndexH\000\022.\n\013unset_index\030\013 \001(\0132" +
-      "\027.greptime.v1.UnsetIndexH\000\022\026\n\016schema_ver" +
+      "\027.greptime.v1.UnsetIndexH\000\0222\n\rdrop_defau" +
-      "sion\030\004 \001(\004B\006\n\004kind\"@\n\nAddColumns\0222\n\013add_" +
+      "lts\030\014 \001(\0132\031.greptime.v1.DropDefaultsH\000\022\026" +
-      "columns\030\001 \003(\0132\035.greptime.v1.region.AddCo" +
+      "\n\016schema_version\030\004 \001(\004B\006\n\004kind\"@\n\nAddCol" +
-      "lumn\"C\n\013DropColumns\0224\n\014drop_columns\030\001 \003(" +
+      "umns\0222\n\013add_columns\030\001 \003(\0132\035.greptime.v1." +
-      "\0132\036.greptime.v1.region.DropColumn\"v\n\tAdd" +
+      "region.AddColumn\"C\n\013DropColumns\0224\n\014drop_" +
-      "Column\0227\n\ncolumn_def\030\001 \001(\0132#.greptime.v1" +
+      "columns\030\001 \003(\0132\036.greptime.v1.region.DropC" +
-      ".region.RegionColumnDef\0220\n\010location\030\003 \001(" +
+      "olumn\"v\n\tAddColumn\0227\n\ncolumn_def\030\001 \001(\0132#" +
-      "\0132\036.greptime.v1.AddColumnLocation\"\032\n\nDro" +
+      ".greptime.v1.region.RegionColumnDef\0220\n\010l" +
-      "pColumn\022\014\n\004name\030\001 \001(\t\"!\n\014FlushRequest\022\021\n" +
+      "ocation\030\003 \001(\0132\036.greptime.v1.AddColumnLoc" +
-      "\tregion_id\030\001 \001(\004\"\t\n\007Regular\"&\n\014StrictWin" +
+      "ation\"\032\n\nDropColumn\022\014\n\004name\030\001 \001(\t\"!\n\014Flu" +
-      "dow\022\026\n\016window_seconds\030\001 \001(\003\"\231\001\n\016CompactR" +
+      "shRequest\022\021\n\tregion_id\030\001 \001(\004\"\t\n\007Regular\"" +
-      "equest\022\021\n\tregion_id\030\001 \001(\004\022.\n\007regular\030\002 \001" +
+      "&\n\014StrictWindow\022\026\n\016window_seconds\030\001 \001(\003\"" +
-      "(\0132\033.greptime.v1.region.RegularH\000\0229\n\rstr" +
+      "\231\001\n\016CompactRequest\022\021\n\tregion_id\030\001 \001(\004\022.\n" +
-      "ict_window\030\003 \001(\0132 .greptime.v1.region.St" +
+      "\007regular\030\002 \001(\0132\033.greptime.v1.region.Regu" +
-      "rictWindowH\000B\t\n\007options\"$\n\017TruncateReque" +
+      "larH\000\0229\n\rstrict_window\030\003 \001(\0132 .greptime." +
-      "st\022\021\n\tregion_id\030\001 \001(\004\"P\n\017RegionColumnDef" +
+      "v1.region.StrictWindowH\000B\t\n\007options\"$\n\017T" +
-      "\022*\n\ncolumn_def\030\001 \001(\0132\026.greptime.v1.Colum" +
+      "runcateRequest\022\021\n\tregion_id\030\001 \001(\004\"P\n\017Reg" +
-      "nDef\022\021\n\tcolumn_id\030\002 \001(\r\"Z\n\021BulkInsertReq" +
+      "ionColumnDef\022*\n\ncolumn_def\030\001 \001(\0132\026.grept" +
-      "uest\022\021\n\tregion_id\030\001 \001(\004\022*\n\tarrow_ipc\030\002 \001" +
+      "ime.v1.ColumnDef\022\021\n\tcolumn_id\030\002 \001(\r\"Z\n\021B" +
-      "(\0132\025.greptime.v1.ArrowIpcH\000B\006\n\004body\"1\n\020M" +
+      "ulkInsertRequest\022\021\n\tregion_id\030\001 \001(\004\022*\n\ta" +
-      "itoManifestInfo\022\035\n\025data_manifest_version" +
+      "rrow_ipc\030\002 \001(\0132\025.greptime.v1.ArrowIpcH\000B" +
-      "\030\001 \001(\004\"V\n\022MetricManifestInfo\022\035\n\025data_man" +
+      "\006\n\004body\"1\n\020MitoManifestInfo\022\035\n\025data_mani" +
-      "ifest_version\030\001 \001(\004\022!\n\031metadata_manifest" +
+      "fest_version\030\001 \001(\004\"V\n\022MetricManifestInfo" +
-      "_version\030\002 \001(\004\"\275\001\n\013SyncRequest\022\021\n\tregion" +
+      "\022\035\n\025data_manifest_version\030\001 \001(\004\022!\n\031metad" +
-      "_id\030\001 \001(\004\022B\n\022mito_manifest_info\030\002 \001(\0132$." +
+      "ata_manifest_version\030\002 \001(\004\"\275\001\n\013SyncReque" +
-      "greptime.v1.region.MitoManifestInfoH\000\022F\n" +
+      "st\022\021\n\tregion_id\030\001 \001(\004\022B\n\022mito_manifest_i" +
-      "\024metric_manifest_info\030\003 \001(\0132&.greptime.v" +
+      "nfo\030\002 \001(\0132$.greptime.v1.region.MitoManif" +
-      "1.region.MetricManifestInfoH\000B\017\n\rmanifes" +
+      "estInfoH\000\022F\n\024metric_manifest_info\030\003 \001(\0132" +
-      "t_info2Y\n\006Region\022O\n\006Handle\022!.greptime.v1" +
+      "&.greptime.v1.region.MetricManifestInfoH" +
-      ".region.RegionRequest\032\".greptime.v1.regi" +
+      "\000B\017\n\rmanifest_info2Y\n\006Region\022O\n\006Handle\022!" +
-      "on.RegionResponseB]\n\025io.greptime.v1.regi" +
+      ".greptime.v1.region.RegionRequest\032\".grep" +
-      "onB\006ServerZ<github.com/GreptimeTeam/grep" +
+      "time.v1.region.RegionResponseB]\n\025io.grep" +
-      "time-proto/go/greptime/v1/regionb\006proto3"
+      "time.v1.regionB\006ServerZ<github.com/Grept" +
+      "imeTeam/greptime-proto/go/greptime/v1/re" +
+      "gionb\006proto3"
     };
     descriptor = com.google.protobuf.Descriptors.FileDescriptor
       .internalBuildGeneratedFileFrom(descriptorData,
@@ -29138,7 +29370,7 @@ java.lang.String defaultValue);
     internal_static_greptime_v1_region_AlterRequest_fieldAccessorTable = new
       com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
         internal_static_greptime_v1_region_AlterRequest_descriptor,
-        new java.lang.String[] { "RegionId", "AddColumns", "DropColumns", "ModifyColumnTypes", "SetTableOptions", "UnsetTableOptions", "SetIndex", "UnsetIndex", "SchemaVersion", "Kind", });
+        new java.lang.String[] { "RegionId", "AddColumns", "DropColumns", "ModifyColumnTypes", "SetTableOptions", "UnsetTableOptions", "SetIndex", "UnsetIndex", "DropDefaults", "SchemaVersion", "Kind", });
     internal_static_greptime_v1_region_AddColumns_descriptor =
       getDescriptor().getMessageTypes().get(16);
     internal_static_greptime_v1_region_AddColumns_fieldAccessorTable = new

proto/greptime/v1/ddl.proto

@@ -114,9 +114,14 @@ message AlterTableExpr {
     UnsetTableOptions unset_table_options = 11;
     SetIndex set_index = 12;
     UnsetIndex unset_index = 13;
+    DropDefaults drop_defaults = 14;
   }
 }
 
+message DropDefault {
+  string column_name = 1;
+}
+
 message SetIndex {
   oneof options {
     SetFulltext fulltext = 1;
@@ -165,6 +170,10 @@ message AddColumns {
   repeated AddColumn add_columns = 1;
 }
 
+message DropDefaults {
+  repeated DropDefault drop_defaults = 1;
+}
+
 message DropColumns { repeated DropColumn drop_columns = 1; }
 
 message ModifyColumnTypes { repeated ModifyColumnType modify_column_types = 1; }

proto/greptime/v1/region/server.proto

@@ -140,6 +140,7 @@ message AlterRequest {
     UnsetTableOptions unset_table_options = 9;
     SetIndex set_index = 10;
     UnsetIndex unset_index = 11;
+    DropDefaults drop_defaults = 12;
   }
   // The version of the schema before applying the alteration.
   uint64 schema_version = 4;