cambyzju commented on a change in pull request #8764:
URL: https://github.com/apache/incubator-doris/pull/8764#discussion_r840196443



##########
File path: be/src/exec/olap_scanner.cpp
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@@ -286,6 +286,8 @@ Status OlapScanner::get_batch(RuntimeState* state, 
RowBatch* batch, bool* eof) {
     int64_t raw_bytes_threshold = config::doris_scanner_row_bytes;
     {
         SCOPED_TIMER(_parent->_scan_timer);
+        ObjectPool tmp_object_pool;

Review comment:
       please add more comments to explain why we need this tmp object pool.




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