replace map with set in ReadMetadata

2 files changed, 6 insertions, 6 deletions

diff --git a/ydb/core/tx/columnshard/columnshard_impl.cpp b/ydb/core/tx/columnshard/columnshard_impl.cpp
index f585262173c..80c3fc5f815 100644
--- a/ydb/core/tx/columnshard/columnshard_impl.cpp
+++ b/ydb/core/tx/columnshard/columnshard_impl.cpp
@@ -1029,18 +1029,18 @@ void TColumnShard::MapExternBlobs(const TActorContext& /*ctx*/, NOlap::TReadMeta
         }
     }
 
-    THashMap<TUnifiedBlobId, TUnifiedBlobId> extMap;
+    auto exported = std::make_shared<THashSet<TUnifiedBlobId>>();
 
     for (auto& blobId : uniqBlobs) {
         TEvictMetadata meta;
         auto evicted = BlobManager->GetEvicted(blobId, meta);
-        if (evicted.ExternBlob.IsValid()) {
-            extMap[blobId] = evicted.ExternBlob;
+        if (evicted.IsExternal()) {
+            exported->insert(blobId);
         }
     }
 
-    if (!extMap.empty()) {
-        metadata.ExternBlobs = std::make_shared<const THashMap<TUnifiedBlobId, TUnifiedBlobId>>(std::move(extMap));
+    if (!exported->empty()) {
+        metadata.ExternBlobs = exported;
     }
 }
 
diff --git a/ydb/core/tx/columnshard/engines/indexed_read_data.h b/ydb/core/tx/columnshard/engines/indexed_read_data.h
index 54cc70ac9cb..92d5278950a 100644
--- a/ydb/core/tx/columnshard/engines/indexed_read_data.h
+++ b/ydb/core/tx/columnshard/engines/indexed_read_data.h
@@ -48,7 +48,7 @@ struct TReadMetadataBase {
     std::shared_ptr<arrow::Schema> LoadSchema; // ResultSchema + required for intermediate operations
     std::shared_ptr<arrow::Schema> ResultSchema; // TODO: add Program modifications
     std::shared_ptr<NSsa::TProgram> Program;
-    std::shared_ptr<const THashMap<TUnifiedBlobId, TUnifiedBlobId>> ExternBlobs; // DS -> S3 map TODO: move out of base
+    std::shared_ptr<const THashSet<TUnifiedBlobId>> ExternBlobs;
     ESorting Sorting{ESorting::ASC}; // Sorting inside returned batches
     ui64 Limit{0}; // TODO