diff --git a/src/backend/commands/copyfrom.c b/src/backend/commands/copyfrom.c
index e77986f9a9..7f1de8a42b 100644
--- a/src/backend/commands/copyfrom.c
+++ b/src/backend/commands/copyfrom.c
@@ -106,31 +106,65 @@ typedef struct CopyMultiInsertInfo
 /* non-export function prototypes */
 static void ClosePipeFromProgram(CopyFromState cstate);
 
-
 /*
- * CopyFromRoutine implementations for text and CSV.
+ * built-in format-specific routines. One-row callbacks are defined in