diff --git a/src/Storages/MergeTree/MergeTreeData.cpp b/src/Storages/MergeTree/MergeTreeData.cpp
index eacec8f50e5..80ad6a4fd67 100644
--- a/src/Storages/MergeTree/MergeTreeData.cpp
+++ b/src/Storages/MergeTree/MergeTreeData.cpp
@@ -5176,7 +5176,9 @@ std::optional<ProjectionCandidate> MergeTreeData::getQueryProcessingStageWithAgg
         if (const StorageReplicatedMergeTree * replicated = dynamic_cast<const StorageReplicatedMergeTree *>(this))
             max_added_blocks = std::make_shared<PartitionIdToMaxBlock>(replicated->getMaxAddedBlocks());
     }
-    auto parts = getDataPartsVector();
+
+    const auto & snapshot_data = assert_cast<const MergeTreeData::SnapshotData &>(*storage_snapshot->data);
+    const auto & parts = snapshot_data.parts;
 
     // If minmax_count_projection is a valid candidate, check its completeness.
     if (minmax_count_projection_candidate)