gaodayue commented on a change in pull request #1577: Support Segment for 
BetaRowset
URL: https://github.com/apache/incubator-doris/pull/1577#discussion_r310420328
 
 

 ##########
 File path: be/src/olap/iterators.h
 ##########
 @@ -21,10 +21,27 @@
 
 namespace doris {
 
+class RowCursor;
 class RowBlockV2;
 class Schema;
 
 struct StorageReadOptions {
+    // lower_bound defines the smallest key at which iterator will
+    // return data.
+    // If lower_bound is null, won't return
+    std::shared_ptr<RowCursor> lower_bound;
 
 Review comment:
   missing `#include <memory>` for shared_ptr

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