diff --git a/contrib/pg_buffercache/Makefile b/contrib/pg_buffercache/Makefile
index 323c0ac8e..df47259e1 100644
--- a/contrib/pg_buffercache/Makefile
+++ b/contrib/pg_buffercache/Makefile
@@ -1,8 +1,5 @@
 # contrib/pg_buffercache/Makefile
 
-MODULE_big = pg_buffercache
-OBJS = pg_buffercache_pages.o
-
 EXTENSION = pg_buffercache
 DATA = pg_buffercache--1.0.sql pg_buffercache--unpackaged--1.0.sql
 
diff --git a/contrib/pg_buffercache/pg_buffercache--1.0.sql b/contrib/pg_buffercache/pg_buffercache--1.0.sql
index 4ca4c4425..b88e82745 100644
--- a/contrib/pg_buffercache/pg_buffercache--1.0.sql
+++ b/contrib/pg_buffercache/pg_buffercache--1.0.sql
@@ -3,18 +3,9 @@
 -- complain if script is sourced in psql, rather than via CREATE EXTENSION
 \echo Use "CREATE EXTENSION pg_buffercache" to load this file. \quit
 
--- Register the function.
-CREATE FUNCTION pg_buffercache_pages()
-RETURNS SETOF RECORD
-AS 'MODULE_PATHNAME', 'pg_buffercache_pages'
-LANGUAGE C;
-
 -- Create a view for convenient access.
 CREATE VIEW pg_buffercache AS
-	SELECT P.* FROM pg_buffercache_pages() AS P
-	(bufferid integer, relfilenode oid, reltablespace oid, reldatabase oid,
-	 relforknumber int2, relblocknumber int8, isdirty bool, usagecount int2);
+	SELECT * FROM pg_buffercache_pages();
 
 -- Don't want these to be available to public.
-REVOKE ALL ON FUNCTION pg_buffercache_pages() FROM PUBLIC;
 REVOKE ALL ON pg_buffercache FROM PUBLIC;
diff --git a/contrib/pg_buffercache/pg_buffercache--unpackaged--1.0.sql b/contrib/pg_buffercache/pg_buffercache--unpackaged--1.0.sql
index bfe6e52f8..46b843463 100644
--- a/contrib/pg_buffercache/pg_buffercache--unpackaged--1.0.sql
+++ b/contrib/pg_buffercache/pg_buffercache--unpackaged--1.0.sql
@@ -3,5 +3,4 @@
 -- complain if script is sourced in psql, rather than via CREATE EXTENSION
 \echo Use "CREATE EXTENSION pg_buffercache" to load this file. \quit
 
-ALTER EXTENSION pg_buffercache ADD function pg_buffercache_pages();
 ALTER EXTENSION pg_buffercache ADD view pg_buffercache;
diff --git a/contrib/pg_buffercache/pg_buffercache_pages.cpp b/contrib/pg_buffercache/pg_buffercache_pages.cpp
index 3d4e31bf8..6d046b06b 100644
--- a/contrib/pg_buffercache/pg_buffercache_pages.cpp
+++ b/contrib/pg_buffercache/pg_buffercache_pages.cpp
@@ -1,6 +1,6 @@
 /*-------------------------------------------------------------------------
  *
- * pg_buffercache_pages.c
+ * pg_buffercache_pages.c (deprecated in openGauss)
  *	  display some contents of the buffer cache
  *
  *	  contrib/pg_buffercache/pg_buffercache_pages.c
@@ -18,14 +18,13 @@
 
 PG_MODULE_MAGIC;
 
-Datum pg_buffercache_pages(PG_FUNCTION_ARGS);
-
 /*
  * Record structure holding the to be exposed cache data.
  */
 typedef struct {
     uint32 bufferid;
     Oid relfilenode;
+    int4 bucketnode;
     Oid reltablespace;
     Oid reldatabase;
     ForkNumber forknum;
@@ -49,6 +48,8 @@ typedef struct {
  */
 PG_FUNCTION_INFO_V1(pg_buffercache_pages);
 
+extern "C" Datum pg_buffercache_pages(PG_FUNCTION_ARGS);
+
 Datum pg_buffercache_pages(PG_FUNCTION_ARGS)
 {
     FuncCallContext* funcctx = NULL;