SERVER-51228 dbHash should return SnapshotUnavailable if the _id index is not visible or ready

1 files changed, 17 insertions, 1 deletions

diff --git a/src/mongo/db/catalog/index_catalog_entry.h b/src/mongo/db/catalog/index_catalog_entry.h
index 8abc7000fdb..e34deceab01 100644
--- a/src/mongo/db/catalog/index_catalog_entry.h
+++ b/src/mongo/db/catalog/index_catalog_entry.h
@@ -137,10 +137,26 @@ public:
                              const KeyStringSet& multikeyMetadataKeys,
                              const MultikeyPaths& multikeyPaths) = 0;
 
-    // if this ready is ready for queries
+    /**
+     * Returns whether this index is ready for queries. This is potentially unsafe in that it does
+     * not consider whether the index is visible or ready in the currently storage snapshot. For
+     * that, use isReadyInMySnapshot() or isPresentInMySnapshot().
+     */
     virtual bool isReady(OperationContext* const opCtx) const = 0;
 
     /**
+     * Safely check whether this index is visible in the durable catalog in the current storage
+     * engine snapshot.
+     */
+    virtual bool isPresentInMySnapshot(OperationContext* opCtx) const = 0;
+
+    /**
+     * Safely check whether this index is visible and ready in the durable catalog in the current
+     * storage engine snapshot.
+     */
+    virtual bool isReadyInMySnapshot(OperationContext* opCtx) const = 0;
+
+    /**
      * Returns true if this index is not ready, and it is not currently in the process of being
      * built either.
      */