feat: add comment field to ColumnDef (#104)

Signed-off-by: Ruihang Xia <waynestxia@gmail.com>

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

@@ -228,6 +228,7 @@ PROTOBUF_CONSTEXPR ColumnDef::ColumnDef(
     ::_pbi::ConstantInitialized): _impl_{
     /*decltype(_impl_.name_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
   , /*decltype(_impl_.default_constraint_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
+  , /*decltype(_impl_.comment_)*/{&::_pbi::fixed_address_empty_string, ::_pbi::ConstantInitialized{}}
   , /*decltype(_impl_.data_type_)*/0
   , /*decltype(_impl_.is_nullable_)*/false
   , /*decltype(_impl_.semantic_type_)*/0
@@ -407,6 +408,7 @@ const uint32_t TableStruct_greptime_2fv1_2fddl_2eproto::offsets[] PROTOBUF_SECTI
   PROTOBUF_FIELD_OFFSET(::greptime::v1::ColumnDef, _impl_.is_nullable_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::ColumnDef, _impl_.default_constraint_),
   PROTOBUF_FIELD_OFFSET(::greptime::v1::ColumnDef, _impl_.semantic_type_),
+  PROTOBUF_FIELD_OFFSET(::greptime::v1::ColumnDef, _impl_.comment_),
   ~0u,  // no _has_bits_
   PROTOBUF_FIELD_OFFSET(::greptime::v1::AddColumnLocation, _internal_metadata_),
   ~0u,  // no _extensions_
@@ -432,7 +434,7 @@ static const ::_pbi::MigrationSchema schemas[] PROTOBUF_SECTION_VARIABLE(protode
   { 120, -1, -1, sizeof(::greptime::v1::DropColumn)},
   { 127, -1, -1, sizeof(::greptime::v1::TableId)},
   { 134, -1, -1, sizeof(::greptime::v1::ColumnDef)},
-  { 145, -1, -1, sizeof(::greptime::v1::AddColumnLocation)},
+  { 146, -1, -1, sizeof(::greptime::v1::AddColumnLocation)},
 };
 
 static const ::_pb::Message* const file_default_instances[] = {
@@ -498,24 +500,24 @@ const char descriptor_table_protodef_greptime_2fv1_2fddl_2eproto[] PROTOBUF_SECT
   "\026.greptime.v1.ColumnDef\0220\n\010location\030\003 \001("
   "\0132\036.greptime.v1.AddColumnLocation\"\032\n\nDro"
   "pColumn\022\014\n\004name\030\001 \001(\t\"\025\n\007TableId\022\n\n\002id\030\001"
-  " \001(\r\"\254\001\n\tColumnDef\022\014\n\004name\030\001 \001(\t\022.\n\tdata"
+  " \001(\r\"\275\001\n\tColumnDef\022\014\n\004name\030\001 \001(\t\022.\n\tdata"
   "_type\030\002 \001(\0162\033.greptime.v1.ColumnDataType"
   "\022\023\n\013is_nullable\030\003 \001(\010\022\032\n\022default_constra"
   "int\030\004 \001(\014\0220\n\rsemantic_type\030\005 \001(\0162\031.grept"
-  "ime.v1.SemanticType\"\230\001\n\021AddColumnLocatio"
+  "ime.v1.SemanticType\022\017\n\007comment\030\006 \001(\t\"\230\001\n"
-  "n\022B\n\rlocation_type\030\001 \001(\0162+.greptime.v1.A"
+  "\021AddColumnLocation\022B\n\rlocation_type\030\001 \001("
-  "ddColumnLocation.LocationType\022\031\n\021after_c"
+  "\0162+.greptime.v1.AddColumnLocation.Locati"
-  "olumn_name\030\002 \001(\t\"$\n\014LocationType\022\t\n\005FIRS"
+  "onType\022\031\n\021after_column_name\030\002 \001(\t\"$\n\014Loc"
-  "T\020\000\022\t\n\005AFTER\020\001BL\n\016io.greptime.v1B\003DdlZ5g"
+  "ationType\022\t\n\005FIRST\020\000\022\t\n\005AFTER\020\001BL\n\016io.gr"
-  "ithub.com/GreptimeTeam/greptime-proto/go"
+  "eptime.v1B\003DdlZ5github.com/GreptimeTeam/"
-  "/greptime/v1b\006proto3"
+  "greptime-proto/go/greptime/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, 2140, descriptor_table_protodef_greptime_2fv1_2fddl_2eproto,
+    false, false, 2157, 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,
     schemas, file_default_instances, TableStruct_greptime_2fv1_2fddl_2eproto::offsets,
@@ -4440,6 +4442,7 @@ ColumnDef::ColumnDef(const ColumnDef& from)
   new (&_impl_) Impl_{
       decltype(_impl_.name_){}
     , decltype(_impl_.default_constraint_){}
+    , decltype(_impl_.comment_){}
     , decltype(_impl_.data_type_){}
     , decltype(_impl_.is_nullable_){}
     , decltype(_impl_.semantic_type_){}
@@ -4462,6 +4465,14 @@ ColumnDef::ColumnDef(const ColumnDef& from)
     _this->_impl_.default_constraint_.Set(from._internal_default_constraint(), 
       _this->GetArenaForAllocation());
   }
+  _impl_.comment_.InitDefault();
+  #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+    _impl_.comment_.Set("", GetArenaForAllocation());
+  #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  if (!from._internal_comment().empty()) {
+    _this->_impl_.comment_.Set(from._internal_comment(), 
+      _this->GetArenaForAllocation());
+  }
   ::memcpy(&_impl_.data_type_, &from._impl_.data_type_,
     static_cast<size_t>(reinterpret_cast<char*>(&_impl_.semantic_type_) -
     reinterpret_cast<char*>(&_impl_.data_type_)) + sizeof(_impl_.semantic_type_));
@@ -4475,6 +4486,7 @@ inline void ColumnDef::SharedCtor(
   new (&_impl_) Impl_{
       decltype(_impl_.name_){}
     , decltype(_impl_.default_constraint_){}
+    , decltype(_impl_.comment_){}
     , decltype(_impl_.data_type_){0}
     , decltype(_impl_.is_nullable_){false}
     , decltype(_impl_.semantic_type_){0}
@@ -4488,6 +4500,10 @@ inline void ColumnDef::SharedCtor(
   #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
     _impl_.default_constraint_.Set("", GetArenaForAllocation());
   #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  _impl_.comment_.InitDefault();
+  #ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+    _impl_.comment_.Set("", GetArenaForAllocation());
+  #endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
 }
 
 ColumnDef::~ColumnDef() {
@@ -4503,6 +4519,7 @@ inline void ColumnDef::SharedDtor() {
   GOOGLE_DCHECK(GetArenaForAllocation() == nullptr);
   _impl_.name_.Destroy();
   _impl_.default_constraint_.Destroy();
+  _impl_.comment_.Destroy();
 }
 
 void ColumnDef::SetCachedSize(int size) const {
@@ -4517,6 +4534,7 @@ void ColumnDef::Clear() {
 
   _impl_.name_.ClearToEmpty();
   _impl_.default_constraint_.ClearToEmpty();
+  _impl_.comment_.ClearToEmpty();
   ::memset(&_impl_.data_type_, 0, static_cast<size_t>(
       reinterpret_cast<char*>(&_impl_.semantic_type_) -
       reinterpret_cast<char*>(&_impl_.data_type_)) + sizeof(_impl_.semantic_type_));
@@ -4574,6 +4592,16 @@ const char* ColumnDef::_InternalParse(const char* ptr, ::_pbi::ParseContext* ctx
         } else
           goto handle_unusual;
         continue;
+      // string comment = 6;
+      case 6:
+        if (PROTOBUF_PREDICT_TRUE(static_cast<uint8_t>(tag) == 50)) {
+          auto str = _internal_mutable_comment();
+          ptr = ::_pbi::InlineGreedyStringParser(str, ptr, ctx);
+          CHK_(ptr);
+          CHK_(::_pbi::VerifyUTF8(str, "greptime.v1.ColumnDef.comment"));
+        } else
+          goto handle_unusual;
+        continue;
       default:
         goto handle_unusual;
     }  // switch
@@ -4639,6 +4667,16 @@ uint8_t* ColumnDef::_InternalSerialize(
       5, this->_internal_semantic_type(), target);
   }
 
+  // string comment = 6;
+  if (!this->_internal_comment().empty()) {
+    ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::VerifyUtf8String(
+      this->_internal_comment().data(), static_cast<int>(this->_internal_comment().length()),
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::SERIALIZE,
+      "greptime.v1.ColumnDef.comment");
+    target = stream->WriteStringMaybeAliased(
+        6, this->_internal_comment(), 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);
@@ -4669,6 +4707,13 @@ size_t ColumnDef::ByteSizeLong() const {
         this->_internal_default_constraint());
   }
 
+  // string comment = 6;
+  if (!this->_internal_comment().empty()) {
+    total_size += 1 +
+      ::PROTOBUF_NAMESPACE_ID::internal::WireFormatLite::StringSize(
+        this->_internal_comment());
+  }
+
   // .greptime.v1.ColumnDataType data_type = 2;
   if (this->_internal_data_type() != 0) {
     total_size += 1 +
@@ -4710,6 +4755,9 @@ void ColumnDef::MergeImpl(::PROTOBUF_NAMESPACE_ID::Message& to_msg, const ::PROT
   if (!from._internal_default_constraint().empty()) {
     _this->_internal_set_default_constraint(from._internal_default_constraint());
   }
+  if (!from._internal_comment().empty()) {
+    _this->_internal_set_comment(from._internal_comment());
+  }
   if (from._internal_data_type() != 0) {
     _this->_internal_set_data_type(from._internal_data_type());
   }
@@ -4746,6 +4794,10 @@ void ColumnDef::InternalSwap(ColumnDef* other) {
       &_impl_.default_constraint_, lhs_arena,
       &other->_impl_.default_constraint_, rhs_arena
   );
+  ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr::InternalSwap(
+      &_impl_.comment_, lhs_arena,
+      &other->_impl_.comment_, rhs_arena
+  );
   ::PROTOBUF_NAMESPACE_ID::internal::memswap<
       PROTOBUF_FIELD_OFFSET(ColumnDef, _impl_.semantic_type_)
       + sizeof(ColumnDef::_impl_.semantic_type_)

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

@@ -2737,6 +2737,7 @@ class ColumnDef final :
   enum : int {
     kNameFieldNumber = 1,
     kDefaultConstraintFieldNumber = 4,
+    kCommentFieldNumber = 6,
     kDataTypeFieldNumber = 2,
     kIsNullableFieldNumber = 3,
     kSemanticTypeFieldNumber = 5,
@@ -2769,6 +2770,20 @@ class ColumnDef final :
   std::string* _internal_mutable_default_constraint();
   public:
 
+  // string comment = 6;
+  void clear_comment();
+  const std::string& comment() const;
+  template <typename ArgT0 = const std::string&, typename... ArgT>
+  void set_comment(ArgT0&& arg0, ArgT... args);
+  std::string* mutable_comment();
+  PROTOBUF_NODISCARD std::string* release_comment();
+  void set_allocated_comment(std::string* comment);
+  private:
+  const std::string& _internal_comment() const;
+  inline PROTOBUF_ALWAYS_INLINE void _internal_set_comment(const std::string& value);
+  std::string* _internal_mutable_comment();
+  public:
+
   // .greptime.v1.ColumnDataType data_type = 2;
   void clear_data_type();
   ::greptime::v1::ColumnDataType data_type() const;
@@ -2806,6 +2821,7 @@ class ColumnDef final :
   struct Impl_ {
     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr name_;
     ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr default_constraint_;
+    ::PROTOBUF_NAMESPACE_ID::internal::ArenaStringPtr comment_;
     int data_type_;
     bool is_nullable_;
     int semantic_type_;
@@ -5504,6 +5520,56 @@ inline void ColumnDef::set_semantic_type(::greptime::v1::SemanticType value) {
   // @@protoc_insertion_point(field_set:greptime.v1.ColumnDef.semantic_type)
 }
 
+// string comment = 6;
+inline void ColumnDef::clear_comment() {
+  _impl_.comment_.ClearToEmpty();
+}
+inline const std::string& ColumnDef::comment() const {
+  // @@protoc_insertion_point(field_get:greptime.v1.ColumnDef.comment)
+  return _internal_comment();
+}
+template <typename ArgT0, typename... ArgT>
+inline PROTOBUF_ALWAYS_INLINE
+void ColumnDef::set_comment(ArgT0&& arg0, ArgT... args) {
+ 
+ _impl_.comment_.Set(static_cast<ArgT0 &&>(arg0), args..., GetArenaForAllocation());
+  // @@protoc_insertion_point(field_set:greptime.v1.ColumnDef.comment)
+}
+inline std::string* ColumnDef::mutable_comment() {
+  std::string* _s = _internal_mutable_comment();
+  // @@protoc_insertion_point(field_mutable:greptime.v1.ColumnDef.comment)
+  return _s;
+}
+inline const std::string& ColumnDef::_internal_comment() const {
+  return _impl_.comment_.Get();
+}
+inline void ColumnDef::_internal_set_comment(const std::string& value) {
+  
+  _impl_.comment_.Set(value, GetArenaForAllocation());
+}
+inline std::string* ColumnDef::_internal_mutable_comment() {
+  
+  return _impl_.comment_.Mutable(GetArenaForAllocation());
+}
+inline std::string* ColumnDef::release_comment() {
+  // @@protoc_insertion_point(field_release:greptime.v1.ColumnDef.comment)
+  return _impl_.comment_.Release();
+}
+inline void ColumnDef::set_allocated_comment(std::string* comment) {
+  if (comment != nullptr) {
+    
+  } else {
+    
+  }
+  _impl_.comment_.SetAllocated(comment, GetArenaForAllocation());
+#ifdef PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  if (_impl_.comment_.IsDefault()) {
+    _impl_.comment_.Set("", GetArenaForAllocation());
+  }
+#endif // PROTOBUF_FORCE_COPY_DEFAULT_STRING
+  // @@protoc_insertion_point(field_set_allocated:greptime.v1.ColumnDef.comment)
+}
+
 // -------------------------------------------------------------------
 
 // AddColumnLocation

go/greptime/v1/ddl.pb.go

@@ -958,6 +958,7 @@ type ColumnDef struct {
 	IsNullable        bool           `protobuf:"varint,3,opt,name=is_nullable,json=isNullable,proto3" json:"is_nullable,omitempty"`
 	DefaultConstraint []byte         `protobuf:"bytes,4,opt,name=default_constraint,json=defaultConstraint,proto3" json:"default_constraint,omitempty"`
 	SemanticType      SemanticType   `protobuf:"varint,5,opt,name=semantic_type,json=semanticType,proto3,enum=greptime.v1.SemanticType" json:"semantic_type,omitempty"`
+	Comment           string         `protobuf:"bytes,6,opt,name=comment,proto3" json:"comment,omitempty"`
 }
 
 func (x *ColumnDef) Reset() {
@@ -1027,6 +1028,13 @@ func (x *ColumnDef) GetSemanticType() SemanticType {
 	return SemanticType_TAG
 }
 
+func (x *ColumnDef) GetComment() string {
+	if x != nil {
+		return x.Comment
+	}
+	return ""
+}
+
 type AddColumnLocation struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1223,7 +1231,7 @@ var file_greptime_v1_ddl_proto_rawDesc = []byte{
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@@ -1238,24 +1246,25 @@ var file_greptime_v1_ddl_proto_rawDesc = []byte{
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+	0x05, 0x41, 0x46, 0x54, 0x45, 0x52, 0x10, 0x01, 0x42, 0x4c, 0x0a, 0x0e, 0x69, 0x6f, 0x2e, 0x67,
-	0x6d, 0x2f, 0x47, 0x72, 0x65, 0x70, 0x74, 0x69, 0x6d, 0x65, 0x54, 0x65, 0x61, 0x6d, 0x2f, 0x67,
+	0x72, 0x65, 0x70, 0x74, 0x69, 0x6d, 0x65, 0x2e, 0x76, 0x31, 0x42, 0x03, 0x44, 0x64, 0x6c, 0x5a,
-	0x72, 0x65, 0x70, 0x74, 0x69, 0x6d, 0x65, 0x2d, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x6f,
+	0x35, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x47, 0x72, 0x65, 0x70,
-	0x2f, 0x67, 0x72, 0x65, 0x70, 0x74, 0x69, 0x6d, 0x65, 0x2f, 0x76, 0x31, 0x62, 0x06, 0x70, 0x72,
+	0x74, 0x69, 0x6d, 0x65, 0x54, 0x65, 0x61, 0x6d, 0x2f, 0x67, 0x72, 0x65, 0x70, 0x74, 0x69, 0x6d,
-	0x6f, 0x74, 0x6f, 0x33,
+	0x65, 0x2d, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x67, 0x6f, 0x2f, 0x67, 0x72, 0x65, 0x70, 0x74,
+	0x69, 0x6d, 0x65, 0x2f, 0x76, 0x31, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (

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

@@ -13015,6 +13015,18 @@ java.lang.String defaultValue);
      * @return The semanticType.
      */
     io.greptime.v1.Common.SemanticType getSemanticType();
+
+    /**
+     * <code>string comment = 6;</code>
+     * @return The comment.
+     */
+    java.lang.String getComment();
+    /**
+     * <code>string comment = 6;</code>
+     * @return The bytes for comment.
+     */
+    com.google.protobuf.ByteString
+        getCommentBytes();
   }
   /**
    * Protobuf type {@code greptime.v1.ColumnDef}
@@ -13033,6 +13045,7 @@ java.lang.String defaultValue);
       dataType_ = 0;
       defaultConstraint_ = com.google.protobuf.ByteString.EMPTY;
       semanticType_ = 0;
+      comment_ = "";
     }
 
     @java.lang.Override
@@ -13093,6 +13106,12 @@ java.lang.String defaultValue);
               semanticType_ = rawValue;
               break;
             }
+            case 50: {
+              java.lang.String s = input.readStringRequireUtf8();
+
+              comment_ = s;
+              break;
+            }
             default: {
               if (!parseUnknownField(
                   input, unknownFields, extensionRegistry, tag)) {
@@ -13225,6 +13244,44 @@ java.lang.String defaultValue);
       return result == null ? io.greptime.v1.Common.SemanticType.UNRECOGNIZED : result;
     }
 
+    public static final int COMMENT_FIELD_NUMBER = 6;
+    private volatile java.lang.Object comment_;
+    /**
+     * <code>string comment = 6;</code>
+     * @return The comment.
+     */
+    @java.lang.Override
+    public java.lang.String getComment() {
+      java.lang.Object ref = comment_;
+      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();
+        comment_ = s;
+        return s;
+      }
+    }
+    /**
+     * <code>string comment = 6;</code>
+     * @return The bytes for comment.
+     */
+    @java.lang.Override
+    public com.google.protobuf.ByteString
+        getCommentBytes() {
+      java.lang.Object ref = comment_;
+      if (ref instanceof java.lang.String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8(
+                (java.lang.String) ref);
+        comment_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+
     private byte memoizedIsInitialized = -1;
     @java.lang.Override
     public final boolean isInitialized() {
@@ -13254,6 +13311,9 @@ java.lang.String defaultValue);
       if (semanticType_ != io.greptime.v1.Common.SemanticType.TAG.getNumber()) {
         output.writeEnum(5, semanticType_);
       }
+      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(comment_)) {
+        com.google.protobuf.GeneratedMessageV3.writeString(output, 6, comment_);
+      }
       unknownFields.writeTo(output);
     }
 
@@ -13282,6 +13342,9 @@ java.lang.String defaultValue);
         size += com.google.protobuf.CodedOutputStream
           .computeEnumSize(5, semanticType_);
       }
+      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(comment_)) {
+        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(6, comment_);
+      }
       size += unknownFields.getSerializedSize();
       memoizedSize = size;
       return size;
@@ -13305,6 +13368,8 @@ java.lang.String defaultValue);
       if (!getDefaultConstraint()
           .equals(other.getDefaultConstraint())) return false;
       if (semanticType_ != other.semanticType_) return false;
+      if (!getComment()
+          .equals(other.getComment())) return false;
       if (!unknownFields.equals(other.unknownFields)) return false;
       return true;
     }
@@ -13327,6 +13392,8 @@ java.lang.String defaultValue);
       hash = (53 * hash) + getDefaultConstraint().hashCode();
       hash = (37 * hash) + SEMANTIC_TYPE_FIELD_NUMBER;
       hash = (53 * hash) + semanticType_;
+      hash = (37 * hash) + COMMENT_FIELD_NUMBER;
+      hash = (53 * hash) + getComment().hashCode();
       hash = (29 * hash) + unknownFields.hashCode();
       memoizedHashCode = hash;
       return hash;
@@ -13470,6 +13537,8 @@ java.lang.String defaultValue);
 
         semanticType_ = 0;
 
+        comment_ = "";
+
         return this;
       }
 
@@ -13501,6 +13570,7 @@ java.lang.String defaultValue);
         result.isNullable_ = isNullable_;
         result.defaultConstraint_ = defaultConstraint_;
         result.semanticType_ = semanticType_;
+        result.comment_ = comment_;
         onBuilt();
         return result;
       }
@@ -13565,6 +13635,10 @@ java.lang.String defaultValue);
         if (other.semanticType_ != 0) {
           setSemanticTypeValue(other.getSemanticTypeValue());
         }
+        if (!other.getComment().isEmpty()) {
+          comment_ = other.comment_;
+          onChanged();
+        }
         this.mergeUnknownFields(other.unknownFields);
         onChanged();
         return this;
@@ -13842,6 +13916,82 @@ java.lang.String defaultValue);
         onChanged();
         return this;
       }
+
+      private java.lang.Object comment_ = "";
+      /**
+       * <code>string comment = 6;</code>
+       * @return The comment.
+       */
+      public java.lang.String getComment() {
+        java.lang.Object ref = comment_;
+        if (!(ref instanceof java.lang.String)) {
+          com.google.protobuf.ByteString bs =
+              (com.google.protobuf.ByteString) ref;
+          java.lang.String s = bs.toStringUtf8();
+          comment_ = s;
+          return s;
+        } else {
+          return (java.lang.String) ref;
+        }
+      }
+      /**
+       * <code>string comment = 6;</code>
+       * @return The bytes for comment.
+       */
+      public com.google.protobuf.ByteString
+          getCommentBytes() {
+        java.lang.Object ref = comment_;
+        if (ref instanceof String) {
+          com.google.protobuf.ByteString b = 
+              com.google.protobuf.ByteString.copyFromUtf8(
+                  (java.lang.String) ref);
+          comment_ = b;
+          return b;
+        } else {
+          return (com.google.protobuf.ByteString) ref;
+        }
+      }
+      /**
+       * <code>string comment = 6;</code>
+       * @param value The comment to set.
+       * @return This builder for chaining.
+       */
+      public Builder setComment(
+          java.lang.String value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  
+        comment_ = value;
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>string comment = 6;</code>
+       * @return This builder for chaining.
+       */
+      public Builder clearComment() {
+        
+        comment_ = getDefaultInstance().getComment();
+        onChanged();
+        return this;
+      }
+      /**
+       * <code>string comment = 6;</code>
+       * @param value The bytes for comment to set.
+       * @return This builder for chaining.
+       */
+      public Builder setCommentBytes(
+          com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  checkByteStringIsUtf8(value);
+        
+        comment_ = value;
+        onChanged();
+        return this;
+      }
       @java.lang.Override
       public final Builder setUnknownFields(
           final com.google.protobuf.UnknownFieldSet unknownFields) {
@@ -14812,17 +14962,17 @@ java.lang.String defaultValue);
       "\026.greptime.v1.ColumnDef\0220\n\010location\030\003 \001(" +
       "\0132\036.greptime.v1.AddColumnLocation\"\032\n\nDro" +
       "pColumn\022\014\n\004name\030\001 \001(\t\"\025\n\007TableId\022\n\n\002id\030\001" +
-      " \001(\r\"\254\001\n\tColumnDef\022\014\n\004name\030\001 \001(\t\022.\n\tdata" +
+      " \001(\r\"\275\001\n\tColumnDef\022\014\n\004name\030\001 \001(\t\022.\n\tdata" +
       "_type\030\002 \001(\0162\033.greptime.v1.ColumnDataType" +
       "\022\023\n\013is_nullable\030\003 \001(\010\022\032\n\022default_constra" +
       "int\030\004 \001(\014\0220\n\rsemantic_type\030\005 \001(\0162\031.grept" +
-      "ime.v1.SemanticType\"\230\001\n\021AddColumnLocatio" +
+      "ime.v1.SemanticType\022\017\n\007comment\030\006 \001(\t\"\230\001\n" +
-      "n\022B\n\rlocation_type\030\001 \001(\0162+.greptime.v1.A" +
+      "\021AddColumnLocation\022B\n\rlocation_type\030\001 \001(" +
-      "ddColumnLocation.LocationType\022\031\n\021after_c" +
+      "\0162+.greptime.v1.AddColumnLocation.Locati" +
-      "olumn_name\030\002 \001(\t\"$\n\014LocationType\022\t\n\005FIRS" +
+      "onType\022\031\n\021after_column_name\030\002 \001(\t\"$\n\014Loc" +
-      "T\020\000\022\t\n\005AFTER\020\001BL\n\016io.greptime.v1B\003DdlZ5g" +
+      "ationType\022\t\n\005FIRST\020\000\022\t\n\005AFTER\020\001BL\n\016io.gr" +
-      "ithub.com/GreptimeTeam/greptime-proto/go" +
+      "eptime.v1B\003DdlZ5github.com/GreptimeTeam/" +
-      "/greptime/v1b\006proto3"
+      "greptime-proto/go/greptime/v1b\006proto3"
     };
     descriptor = com.google.protobuf.Descriptors.FileDescriptor
       .internalBuildGeneratedFileFrom(descriptorData,
@@ -14918,7 +15068,7 @@ java.lang.String defaultValue);
     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", });
+        new java.lang.String[] { "Name", "DataType", "IsNullable", "DefaultConstraint", "SemanticType", "Comment", });
     internal_static_greptime_v1_AddColumnLocation_descriptor =
       getDescriptor().getMessageTypes().get(13);
     internal_static_greptime_v1_AddColumnLocation_fieldAccessorTable = new

proto/greptime/v1/ddl.proto

@@ -102,6 +102,7 @@ message ColumnDef {
   bool is_nullable = 3;
   bytes default_constraint = 4;
   SemanticType semantic_type = 5;
+  string comment = 6;
 }
 
 message AddColumnLocation {