yiguolei commented on code in PR #10397:
URL: https://github.com/apache/doris/pull/10397#discussion_r905765702


##########
be/src/olap/rowset/segment_v2/segment_iterator.cpp:
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@@ -935,13 +937,22 @@ Status SegmentIterator::next_batch(vectorized::Block* 
block) {
                 _current_return_columns[cid]->reserve(_opts.block_row_max);
             }
         }
+        //count non predicate column size

Review Comment:
   The length is definition size, not the actual data size, user may define the 
length == varchar(1000), but only save a single char.



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