diff --git a/src/storage/access/ob_multiple_merge.cpp b/src/storage/access/ob_multiple_merge.cpp
index d83f38e0c6..2180811a93 100644
--- a/src/storage/access/ob_multiple_merge.cpp
+++ b/src/storage/access/ob_multiple_merge.cpp
@@ -1504,7 +1504,7 @@ int ObMultipleMerge::set_base_version() const {
   int ret = OB_SUCCESS;
   // When the major table is currently being processed, the snapshot version is taken and placed
   // in the current context for base version to filter unnecessary rows in the mini or minor sstable
-  if (OB_LIKELY(tables_.count() > 0)) {
+  if (is_scan() && tables_.count() > 0) {
     ObITable *table = nullptr;
     if (OB_FAIL(tables_.at(0, table))) {
       STORAGE_LOG(WARN, "Fail to get the first store", K(ret));
diff --git a/src/storage/access/ob_store_row_iterator.h b/src/storage/access/ob_store_row_iterator.h
index 1e150b09ae..c482cc9d97 100644
--- a/src/storage/access/ob_store_row_iterator.h
+++ b/src/storage/access/ob_store_row_iterator.h
@@ -200,6 +200,7 @@ public:
   VIRTUAL_TO_STRING_KV(K_(type));
 public:
   ObQRIterType get_type() const { return type_; }
+  bool is_scan() const { return type_ == T_SINGLE_SCAN || type_ == T_MULTI_SCAN; }
 protected:
   ObQRIterType type_;