1 files changed, 12 insertions, 1 deletions
diff --git a/src/mongo/db/query/canonical_query.h b/src/mongo/db/query/canonical_query.h
index 921b4eadb92..83fd713512a 100644
--- a/src/mongo/db/query/canonical_query.h
+++ b/src/mongo/db/query/canonical_query.h
@@ -92,7 +92,8 @@ public:
                                                                     MatchExpression* root);
 
     /**
-     * Returns true if "query" describes an exact-match query on _id.
+     * Returns true if "query" describes an exact-match query on _id, possibly with
+     * the $isolated/$atomic modifier.
      */
     static bool isSimpleIdQuery(const BSONObj& query);
 
@@ -170,6 +171,14 @@ public:
         return _canHaveNoopMatchNodes;
     }
 
+    /**
+     * Returns true if the query this CanonicalQuery was parsed from included a $isolated/$atomic
+     * operator.
+     */
+    bool isIsolated() const {
+        return _isIsolated;
+    }
+
 private:
     // You must go through canonicalize to create a CanonicalQuery.
     CanonicalQuery() {}
@@ -190,6 +199,8 @@ private:
     std::unique_ptr<CollatorInterface> _collator;
 
     bool _canHaveNoopMatchNodes = false;
+
+    bool _isIsolated;
 };
 
 }  // namespace mongo