HappenLee commented on a change in pull request #7828:
URL: https://github.com/apache/incubator-doris/pull/7828#discussion_r806712392
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File path: be/src/vec/data_types/data_type_hll.cpp
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@@ -76,10 +79,12 @@ int64_t
DataTypeHLL::get_uncompressed_serialized_bytes(const IColumn& column) co
auto allocate_content_size = 0;
for (size_t i = 0; i < column.size(); ++i) {
auto& hll = const_cast<HyperLogLog&>(data_column.get_element(i));
- allocate_content_size += hll.max_serialized_size();
+ std::string result(hll.max_serialized_size(), '0');
+ size_t actual_size = hll.serialize((uint8_t*)result.c_str());
Review comment:
should not serialize two times
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