diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index ceda48e0fc..809ccb8047 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -18740,6 +18740,10 @@ SELECT collation for ('foo' COLLATE "de_DE");
     <primary>pg_get_object_address</primary>
    </indexterm>
 
+   <indexterm>
+    <primary>pg_is_user_object</primary>
+   </indexterm>
+
   <para>
    <xref linkend="functions-info-object-table"/> lists functions related to
    database object identification and addressing.
@@ -18768,6 +18772,11 @@ SELECT collation for ('foo' COLLATE "de_DE");
        <entry><parameter>type</parameter> <type>text</type>, <parameter>object_names</parameter> <type>text[]</type>, <parameter>object_args</parameter> <type>text[]</type></entry>
        <entry>get external representation of a database object's address</entry>
       </row>
+      <row>
+       <entry><literal><function>pg_is_user_object(<parameter>oid</parameter>)</function></literal></entry>
+       <entry><type>bool</type></entry>
+       <entry>true if <parameter>oid</parameter> is user defined object</entry>
+      </row>
       <row>
        <entry><literal><function>pg_get_object_address(<parameter>type</parameter> <type>text</type>, <parameter>object_names</parameter> <type>text[]</type>, <parameter>object_args</parameter> <type>text[]</type>)</function></literal></entry>
        <entry><parameter>classid</parameter> <type>oid</type>, <parameter>objid</parameter> <type>oid</type>, <parameter>objsubid</parameter> <type>integer</type></entry>
diff --git a/src/backend/utils/adt/ruleutils.c b/src/backend/utils/adt/ruleutils.c
index 158784474d..335b13d52f 100644
--- a/src/backend/utils/adt/ruleutils.c
+++ b/src/backend/utils/adt/ruleutils.c
@@ -3202,6 +3202,16 @@ pg_get_function_arg_default(PG_FUNCTION_ARGS)
 	PG_RETURN_TEXT_P(string_to_text(str));
 }
 
+/*
+ * Return true if the given oid is normal user object
+ */
+Datum
+pg_is_user_object(PG_FUNCTION_ARGS)
+{
+	Oid oid = PG_GETARG_OID(0);
+
+	PG_RETURN_BOOL(oid >= FirstNormalObjectId);
+}
 
 /*
  * deparse_expression			- General utility for deparsing expressions
diff --git a/src/include/catalog/pg_proc.dat b/src/include/catalog/pg_proc.dat
index 226c904c04..196a59e031 100644
--- a/src/include/catalog/pg_proc.dat
+++ b/src/include/catalog/pg_proc.dat
@@ -3637,6 +3637,10 @@
   proname => 'pg_get_function_arg_default', provolatile => 's',
   prorettype => 'text', proargtypes => 'oid int4',
   prosrc => 'pg_get_function_arg_default' },
+{ oid => '4192', descr => 'identify normal user object',
+  proname => 'pg_is_user_object', provolatile => 's',
+  prorettype => 'bool', proargtypes => 'oid',
+  prosrc => 'pg_is_user_object' },
 
 { oid => '1686', descr => 'list of SQL keywords',
   proname => 'pg_get_keywords', procost => '10', prorows => '400',
diff --git a/src/test/regress/expected/object_address.out b/src/test/regress/expected/object_address.out
index d6d1470156..caec91d1c4 100644
--- a/src/test/regress/expected/object_address.out
+++ b/src/test/regress/expected/object_address.out
@@ -492,6 +492,19 @@ SELECT (pg_identify_object(addr1.classid, addr1.objid, addr1.objsubid)).*,
  publication relation      |            |                   | addr_nsp.gentable in publication addr_pub                            | t
 (49 rows)
 
+--check if the object is built-in or user-defined
+SELECT pg_is_user_object('pg_class'::regclass);
+ pg_is_user_object 
+-------------------
+ f
+(1 row)
+
+SELECT pg_is_user_object('trig'::regproc);
+ pg_is_user_object 
+-------------------
+ t
+(1 row)
+
 ---
 --- Cleanup resources
 ---
diff --git a/src/test/regress/sql/object_address.sql b/src/test/regress/sql/object_address.sql
index 8e06248eb5..faac767ff3 100644
--- a/src/test/regress/sql/object_address.sql
+++ b/src/test/regress/sql/object_address.sql
@@ -210,6 +210,10 @@ SELECT (pg_identify_object(addr1.classid, addr1.objid, addr1.objsubid)).*,
 			pg_get_object_address(typ, nms, ioa.args) as addr2
 	ORDER BY addr1.classid, addr1.objid, addr1.objsubid;
 
+--check if the object is built-in or user-defined
+SELECT pg_is_user_object('pg_class'::regclass);
+SELECT pg_is_user_object('trig'::regproc);
+
 ---
 --- Cleanup resources
 ---