src/include/access/heapam.h

@@ -98,8 +98,8 @@ typedef struct TableScanDescData
     TupleTableSlot *slot; /* For begin scan of CopyTo */
 
     /* variables for batch mode scan */
-    int rs_ctupRows;
-    int rs_maxScanRows;
+    int rs_ctupRows; /* current line number scanned */
+    int rs_maxScanRows; /* maximum number of rows that can be scanned */
 } TableScanDescData;
 
 /* struct definition appears in relscan.h */