[enhancement](serialize) add dcheck to ensure pb type is set (#24645)

should check the pb's type is set, or the deserialize will core.
should not return unknown type because deserialize will core.
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Co-authored-by: yiguolei <yiguolei@gmail.com>

be/src/vec/core/block.cpp

@@ -827,6 +827,7 @@ Status Block::serialize(int be_exec_version, PBlock* pblock,
     for (const auto& c : *this) {
         PColumnMeta* pcm = pblock->add_column_metas();
         c.to_pb_column_meta(pcm);
+        DCHECK(pcm->type() != PGenericType::UNKNOWN) << " forget to set pb type";
         // get serialized size
         content_uncompressed_size +=
                 c.type->get_uncompressed_serialized_bytes(*(c.column), pblock->be_exec_version());

be/src/vec/data_types/data_type.cpp

@@ -174,6 +174,7 @@ PGenericType_TypeId IDataType::get_pdata_type(const IDataType* data_type) {
     case TypeIndex::TimeV2:
         return PGenericType::TIMEV2;
     default:
+        LOG(FATAL) << fmt::format("could not mapping type {} to pb type", data_type->get_type_id());
         return PGenericType::UNKNOWN;
     }
 }