1 files changed, 8 insertions, 0 deletions
diff --git a/src/mongo/db/query/explain.cpp b/src/mongo/db/query/explain.cpp
index 709d8ffda4a..eb109928be4 100644
--- a/src/mongo/db/query/explain.cpp
+++ b/src/mongo/db/query/explain.cpp
@@ -34,6 +34,7 @@
 #include "mongo/base/owned_pointer_vector.h"
 #include "mongo/bson/util/builder.h"
 #include "mongo/db/exec/cached_plan.h"
+#include "mongo/db/exec/collection_scan.h"
 #include "mongo/db/exec/count_scan.h"
 #include "mongo/db/exec/distinct_scan.h"
 #include "mongo/db/exec/idhack.h"
@@ -1015,6 +1016,13 @@ void Explain::getSummaryStats(const PlanExecutor& exec, PlanSummaryStats* statsO
             statsOut->replanned = cachedStats->replanned;
         } else if (STAGE_MULTI_PLAN == stages[i]->stageType()) {
             statsOut->fromMultiPlanner = true;
+        } else if (STAGE_COLLSCAN == stages[i]->stageType()) {
+            statsOut->collectionScans++;
+            const auto collScan = static_cast<const CollectionScan*>(stages[i]);
+            const auto collScanStats =
+                static_cast<const CollectionScanStats*>(collScan->getSpecificStats());
+            if (!collScanStats->tailable)
+                statsOut->collectionScansNonTailable++;
         }
     }
 }