From 415a14f636d69533974aff5cd64333256c68857d Mon Sep 17 00:00:00 2001
From: Yongqiang YANG <dataroaring@gmail.com>
Date: Fri, 29 Dec 2023 15:01:13 +0800
Subject: [PATCH] fix

---
 be/src/olap/rowset/beta_rowset_reader.h | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/be/src/olap/rowset/beta_rowset_reader.h b/be/src/olap/rowset/beta_rowset_reader.h
index 142e7daa55042be..fd275988164706f 100644
--- a/be/src/olap/rowset/beta_rowset_reader.h
+++ b/be/src/olap/rowset/beta_rowset_reader.h
@@ -90,7 +90,16 @@ class BetaRowsetReader : public RowsetReader {
     bool _should_push_down_value_predicates() const;
     bool _is_merge_iterator() const {
         return _read_context->need_ordered_result &&
-               _rowset->rowset_meta()->is_segments_overlapping() && _segment_offsets.size() > 1;
+               _rowset->rowset_meta()->is_segments_overlapping() && _get_segment_num() > 1;
+    }
+
+    int32_t _get_segment_num() const {
+        auto [seg_start, seg_end] = _segment_offsets;
+        if (seg_start == seg_end) {
+            seg_start = 0;
+            seg_end = _rowset->num_segments();
+        }
+        return seg_end - seg_start;
     }
 
     DorisCallOnce<Status> _init_iter_once;