From 28c14e77248e07ee71425e8d611f52197e09c2f2 Mon Sep 17 00:00:00 2001
From: DengzhiLiu <dengzhiliu@gmail.com>
Date: Wed, 21 Jun 2023 12:48:38 +0000
Subject: [PATCH] Add defense for range scan in multi version sstable

---
 src/storage/blocksstable/ob_micro_block_row_scanner.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/storage/blocksstable/ob_micro_block_row_scanner.cpp b/src/storage/blocksstable/ob_micro_block_row_scanner.cpp
index 1e1e21f69..fcf637caa 100644
--- a/src/storage/blocksstable/ob_micro_block_row_scanner.cpp
+++ b/src/storage/blocksstable/ob_micro_block_row_scanner.cpp
@@ -895,6 +895,13 @@ int ObMultiVersionMicroBlockRowScanner::inner_get_next_row_impl(const ObDatumRow
         ++context_->table_store_stat_.logical_read_cnt_;
       }
     }
+  } else {
+    if (!reverse_scan_ && (last_ < reader_->row_count() - 1) &&
+        !is_row_empty(prev_micro_row_)) {
+      ret = OB_ERR_UNEXPECTED;
+      LOG_WARN("Unexpected locate range", K(ret), K_(start), K_(last), K_(reverse_scan), KPC_(range),
+               K_(prev_micro_row), K_(macro_id));
+    }
   }
   return ret;
 }