Support opfamily members in get_object_address

In the spirit of 890192e99af and 4464303405f: have get_object_address
understand individual pg_amop and pg_amproc objects.  There is no way to
refer to such objects directly in the grammar -- rather, they are almost
always considered an integral part of the opfamily that contains them.
(The only case that deals with them individually is ALTER OPERATOR
FAMILY ADD/DROP, which carries the opfamily address separately and thus
does not need it to be part of each added/dropped element's address.)
In event triggers it becomes possible to become involved with individual
amop/amproc elements, and this commit enables pg_get_object_address to
do so as well.

To make the overall coding simpler, this commit also slightly changes
the get_object_address representation for opclasses and opfamilies:
instead of having the AM name in the objargs array, I moved it as the
first element of the objnames array.  This enables the new code to use
objargs for the type names used by pg_amop and pg_amproc.

Reviewed by: Stephen Frost

7 files changed, 264 insertions, 117 deletions

diff --git a/src/backend/catalog/objectaddress.c b/src/backend/catalog/objectaddress.c
index 142bc689e95..46ea09a6118 100644
--- a/src/backend/catalog/objectaddress.c
+++ b/src/backend/catalog/objectaddress.c
@@ -492,9 +492,9 @@ ObjectTypeMap[] =
 	/* OCLASS_OPFAMILY */
 	{ "operator family", OBJECT_OPFAMILY },
 	/* OCLASS_AMOP */
-	{ "operator of access method", -1 },	/* unmapped */
+	{ "operator of access method", OBJECT_AMOP },
 	/* OCLASS_AMPROC */
-	{ "function of access method", -1 },	/* unmapped */
+	{ "function of access method", OBJECT_AMPROC },
 	/* OCLASS_REWRITE */
 	{ "rule", OBJECT_RULE },
 	/* OCLASS_TRIGGER */
@@ -552,9 +552,12 @@ static ObjectAddress get_object_address_attrdef(ObjectType objtype,
 						   List *objname, Relation *relp, LOCKMODE lockmode,
 						   bool missing_ok);
 static ObjectAddress get_object_address_type(ObjectType objtype,
-						List *objname, bool missing_ok);
+						ListCell *typecell, bool missing_ok);
 static ObjectAddress get_object_address_opcf(ObjectType objtype, List *objname,
-						List *objargs, bool missing_ok);
+						bool missing_ok);
+static ObjectAddress get_object_address_opf_member(ObjectType objtype,
+							  List *objname, List *objargs, bool missing_ok);
+
 static ObjectAddress get_object_address_usermapping(List *objname,
 							   List *objargs, bool missing_ok);
 static ObjectAddress get_object_address_defacl(List *objname, List *objargs,
@@ -567,8 +570,7 @@ static void getRelationTypeDescription(StringInfo buffer, Oid relid,
 						   int32 objectSubId);
 static void getProcedureTypeDescription(StringInfo buffer, Oid procid);
 static void getConstraintTypeDescription(StringInfo buffer, Oid constroid);
-static void getOpFamilyIdentity(StringInfo buffer, Oid opfid, List **objname,
-					List **objargs);
+static void getOpFamilyIdentity(StringInfo buffer, Oid opfid, List **objname);
 static void getRelationIdentity(StringInfo buffer, Oid relid, List **objname);
 
 /*
@@ -661,7 +663,8 @@ get_object_address(ObjectType objtype, List *objname, List *objargs,
 					ObjectAddress	domaddr;
 					char		   *constrname;
 
-					domaddr = get_object_address_type(OBJECT_DOMAIN, objname, missing_ok);
+					domaddr = get_object_address_type(OBJECT_DOMAIN,
+													  list_head(objname), missing_ok);
 					constrname = strVal(linitial(objargs));
 
 					address.classId = ConstraintRelationId;
@@ -685,7 +688,7 @@ get_object_address(ObjectType objtype, List *objname, List *objargs,
 				break;
 			case OBJECT_TYPE:
 			case OBJECT_DOMAIN:
-				address = get_object_address_type(objtype, objname, missing_ok);
+				address = get_object_address_type(objtype, list_head(objname), missing_ok);
 				break;
 			case OBJECT_AGGREGATE:
 				address.classId = ProcedureRelationId;
@@ -721,8 +724,12 @@ get_object_address(ObjectType objtype, List *objname, List *objargs,
 				break;
 			case OBJECT_OPCLASS:
 			case OBJECT_OPFAMILY:
-				address = get_object_address_opcf(objtype,
-											   objname, objargs, missing_ok);
+				address = get_object_address_opcf(objtype, objname, missing_ok);
+				break;
+			case OBJECT_AMOP:
+			case OBJECT_AMPROC:
+				address = get_object_address_opf_member(objtype, objname,
+														objargs, missing_ok);
 				break;
 			case OBJECT_LARGEOBJECT:
 				Assert(list_length(objname) == 1);
@@ -1309,13 +1316,13 @@ get_object_address_attrdef(ObjectType objtype, List *objname,
  * Find the ObjectAddress for a type or domain
  */
 static ObjectAddress
-get_object_address_type(ObjectType objtype, List *objname, bool missing_ok)
+get_object_address_type(ObjectType objtype, ListCell *typecell, bool missing_ok)
 {
 	ObjectAddress address;
 	TypeName   *typename;
 	Type		tup;
 
-	typename = (TypeName *) linitial(objname);
+	typename = (TypeName *) lfirst(typecell);
 
 	address.classId = TypeRelationId;
 	address.objectId = InvalidOid;
@@ -1351,15 +1358,14 @@ get_object_address_type(ObjectType objtype, List *objname, bool missing_ok)
  * Find the ObjectAddress for an opclass or opfamily.
  */
 static ObjectAddress
-get_object_address_opcf(ObjectType objtype,
-						List *objname, List *objargs, bool missing_ok)
+get_object_address_opcf(ObjectType objtype, List *objname, bool missing_ok)
 {
 	Oid			amoid;
 	ObjectAddress address;
 
-	Assert(list_length(objargs) == 1);
 	/* XXX no missing_ok support here */
-	amoid = get_am_oid(strVal(linitial(objargs)), false);
+	amoid = get_am_oid(strVal(linitial(objname)), false);
+	objname = list_copy_tail(objname, 1);
 
 	switch (objtype)
 	{
@@ -1385,6 +1391,114 @@ get_object_address_opcf(ObjectType objtype,
 }
 
 /*
+ * Find the ObjectAddress for an opclass/opfamily member.
+ *
+ * (The returned address corresponds to a pg_amop/pg_amproc object).
+ */
+static ObjectAddress
+get_object_address_opf_member(ObjectType objtype,
+							  List *objname, List *objargs, bool missing_ok)
+{
+	ObjectAddress	famaddr;
+	ObjectAddress	address;
+	ListCell *cell;
+	List   *copy;
+	char   *typenames[2];
+	Oid		typeoids[2];
+	int		membernum;
+	int		i;
+
+	/*
+	 * The last element of the objname list contains the strategy or procedure
+	 * number.  We need to strip that out before getting the opclass/family
+	 * address.  The rest can be used directly by get_object_address_opcf().
+	 */
+	membernum = atoi(strVal(llast(objname)));
+	copy = list_truncate(list_copy(objname), list_length(objname) - 1);
+
+	/* no missing_ok support here */
+	famaddr = get_object_address_opcf(OBJECT_OPFAMILY, copy, false);
+
+	/* find out left/right type names and OIDs */
+	i = 0;
+	foreach (cell, objargs)
+	{
+		ObjectAddress	typaddr;
+
+		typenames[i] = strVal(lfirst(cell));
+		typaddr = get_object_address_type(OBJECT_TYPE, cell, missing_ok);
+		typeoids[i] = typaddr.objectId;
+		if (i++ >= 2)
+			break;
+	}
+
+	switch (objtype)
+	{
+		case OBJECT_AMOP:
+			{
+				HeapTuple	tp;
+
+				ObjectAddressSet(address, AccessMethodOperatorRelationId,
+								 InvalidOid);
+
+				tp = SearchSysCache4(AMOPSTRATEGY,
+									 ObjectIdGetDatum(famaddr.objectId),
+									 ObjectIdGetDatum(typeoids[0]),
+									 ObjectIdGetDatum(typeoids[1]),
+									 Int16GetDatum(membernum));
+				if (!HeapTupleIsValid(tp))
+				{
+					if (!missing_ok)
+						ereport(ERROR,
+								(errcode(ERRCODE_UNDEFINED_OBJECT),
+								 errmsg("operator %d (%s, %s) of %s does not exist",
+										membernum, typenames[0], typenames[1],
+										getObjectDescription(&famaddr))));
+				}
+				else
+				{
+					address.objectId = HeapTupleGetOid(tp);
+					ReleaseSysCache(tp);
+				}
+			}
+			break;
+
+		case OBJECT_AMPROC:
+			{
+				HeapTuple	tp;
+
+				ObjectAddressSet(address, AccessMethodProcedureRelationId,
+								 InvalidOid);
+
+				tp = SearchSysCache4(AMPROCNUM,
+									 ObjectIdGetDatum(famaddr.objectId),
+									 ObjectIdGetDatum(typeoids[0]),
+									 ObjectIdGetDatum(typeoids[1]),
+									 Int16GetDatum(membernum));
+				if (!HeapTupleIsValid(tp))
+				{
+					if (!missing_ok)
+						ereport(ERROR,
+								(errcode(ERRCODE_UNDEFINED_OBJECT),
+								 errmsg("function %d (%s, %s) of %s does not exist",
+										membernum, typenames[0], typenames[1],
+										getObjectDescription(&famaddr))));
+				}
+				else
+				{
+					address.objectId = HeapTupleGetOid(tp);
+					ReleaseSysCache(tp);
+				}
+			}
+			break;
+		default:
+			elog(ERROR, "unrecognized objtype: %d", (int) objtype);
+	}
+
+	return address;
+}
+
+/*
  * Find the ObjectAddress for a user mapping.
  */
 static ObjectAddress
@@ -1673,7 +1787,9 @@ pg_get_object_address(PG_FUNCTION_ARGS)
 	if (type == OBJECT_AGGREGATE ||
 		type == OBJECT_FUNCTION ||
 		type == OBJECT_OPERATOR ||
-		type == OBJECT_CAST)
+		type == OBJECT_CAST ||
+		type == OBJECT_AMOP ||
+		type == OBJECT_AMPROC)
 	{
 		/* in these cases, the args list must be of TypeName */
 		Datum  *elems;
@@ -1708,8 +1824,6 @@ pg_get_object_address(PG_FUNCTION_ARGS)
 	switch (type)
 	{
 		case OBJECT_DOMCONSTRAINT:
-		case OBJECT_OPCLASS:
-		case OBJECT_OPFAMILY:
 		case OBJECT_CAST:
 		case OBJECT_USER_MAPPING:
 		case OBJECT_DEFACL:
@@ -1718,6 +1832,20 @@ pg_get_object_address(PG_FUNCTION_ARGS)
 						(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
 						 errmsg("argument list length must be exactly %d", 1)));
 			break;
+		case OBJECT_OPFAMILY:
+		case OBJECT_OPCLASS:
+			if (list_length(name) < 2)
+				ereport(ERROR,
+						(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+						 errmsg("name list length must be at least %d", 2)));
+			break;
+		case OBJECT_AMOP:
+		case OBJECT_AMPROC:
+			if (list_length(name) < 3)
+				ereport(ERROR,
+						(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
+						 errmsg("name list length must be at least %d", 3)));
+			/* fall through to check args length */
 		case OBJECT_OPERATOR:
 			if (list_length(args) != 2)
 				ereport(ERROR,
@@ -3730,24 +3858,22 @@ getObjectIdentityParts(const ObjectAddress *object,
 						 opcForm->opcmethod);
 				amForm = (Form_pg_am) GETSTRUCT(amTup);
 
-				appendStringInfoString(&buffer,
-									   quote_qualified_identifier(schema,
-												 NameStr(opcForm->opcname)));
-				appendStringInfo(&buffer, " USING %s",
+				appendStringInfo(&buffer, "%s USING %s",
+								 quote_qualified_identifier(schema,
+															NameStr(opcForm->opcname)),
 								 quote_identifier(NameStr(amForm->amname)));
 				if (objname)
-				{
-					*objname = list_make2(pstrdup(schema),
+					*objname = list_make3(pstrdup(NameStr(amForm->amname)),
+										  schema,
 										  pstrdup(NameStr(opcForm->opcname)));
-					*objargs = list_make1(pstrdup(NameStr(amForm->amname)));
-				}
+
 				ReleaseSysCache(amTup);
 				ReleaseSysCache(opcTup);
 				break;
 			}
 
 		case OCLASS_OPFAMILY:
-			getOpFamilyIdentity(&buffer, object->objectId, objname, objargs);
+			getOpFamilyIdentity(&buffer, object->objectId, objname);
 			break;
 
 		case OCLASS_AMOP:
@@ -3758,10 +3884,8 @@ getObjectIdentityParts(const ObjectAddress *object,
 				SysScanDesc amscan;
 				Form_pg_amop amopForm;
 				StringInfoData opfam;
-
-				/* no objname support here */
-				if (objname)
-					*objname = NIL;
+				char	   *ltype;
+				char	   *rtype;
 
 				amopDesc = heap_open(AccessMethodOperatorRelationId,
 									 AccessShareLock);
@@ -3783,13 +3907,21 @@ getObjectIdentityParts(const ObjectAddress *object,
 				amopForm = (Form_pg_amop) GETSTRUCT(tup);
 
 				initStringInfo(&opfam);
-				getOpFamilyIdentity(&opfam, amopForm->amopfamily, NULL, NULL);
+				getOpFamilyIdentity(&opfam, amopForm->amopfamily, objname);
+
+				ltype = format_type_be_qualified(amopForm->amoplefttype);
+				rtype = format_type_be_qualified(amopForm->amoprighttype);
+
+				if (objname)
+				{
+					*objname = lappend(*objname,
+									   psprintf("%d", amopForm->amopstrategy));
+					*objargs = list_make2(ltype, rtype);
+				}
 
 				appendStringInfo(&buffer, "operator %d (%s, %s) of %s",
 								 amopForm->amopstrategy,
-							format_type_be_qualified(amopForm->amoplefttype),
-						   format_type_be_qualified(amopForm->amoprighttype),
-								 opfam.data);
+								 ltype, rtype, opfam.data);
 
 				pfree(opfam.data);
 
@@ -3806,10 +3938,8 @@ getObjectIdentityParts(const ObjectAddress *object,
 				HeapTuple	tup;
 				Form_pg_amproc amprocForm;
 				StringInfoData opfam;
-
-				/* no objname support here */
-				if (objname)
-					*objname = NIL;
+				char	   *ltype;
+				char	   *rtype;
 
 				amprocDesc = heap_open(AccessMethodProcedureRelationId,
 									   AccessShareLock);
@@ -3831,13 +3961,21 @@ getObjectIdentityParts(const ObjectAddress *object,
 				amprocForm = (Form_pg_amproc) GETSTRUCT(tup);
 
 				initStringInfo(&opfam);
-				getOpFamilyIdentity(&opfam, amprocForm->amprocfamily, NULL, NULL);
+				getOpFamilyIdentity(&opfam, amprocForm->amprocfamily, objname);
+
+				ltype = format_type_be_qualified(amprocForm->amproclefttype);
+				rtype = format_type_be_qualified(amprocForm->amprocrighttype);
+
+				if (objname)
+				{
+					*objname = lappend(*objname,
+									   psprintf("%d", amprocForm->amprocnum));
+					*objargs = list_make2(ltype, rtype);
+				}
 
 				appendStringInfo(&buffer, "function %d (%s, %s) of %s",
 								 amprocForm->amprocnum,
-						format_type_be_qualified(amprocForm->amproclefttype),
-					   format_type_be_qualified(amprocForm->amprocrighttype),
-								 opfam.data);
+								 ltype, rtype, opfam.data);
 
 				pfree(opfam.data);
 
@@ -4263,7 +4401,7 @@ getObjectIdentityParts(const ObjectAddress *object,
 }
 
 static void
-getOpFamilyIdentity(StringInfo buffer, Oid opfid, List **objname, List **objargs)
+getOpFamilyIdentity(StringInfo buffer, Oid opfid, List **objname)
 {
 	HeapTuple	opfTup;
 	Form_pg_opfamily opfForm;
@@ -4289,11 +4427,9 @@ getOpFamilyIdentity(StringInfo buffer, Oid opfid, List **objname, List **objargs
 					 NameStr(amForm->amname));
 
 	if (objname)
-	{
-		*objname = list_make2(pstrdup(schema),
+		*objname = list_make3(pstrdup(NameStr(amForm->amname)),
+							  pstrdup(schema),
 							  pstrdup(NameStr(opfForm->opfname)));
-		*objargs = list_make1(pstrdup(NameStr(amForm->amname)));
-	}
 
 	ReleaseSysCache(amTup);
 	ReleaseSysCache(opfTup);
diff --git a/src/backend/commands/dropcmds.c b/src/backend/commands/dropcmds.c
index e5185ba34d2..a1b0d4d2fa2 100644
--- a/src/backend/commands/dropcmds.c
+++ b/src/backend/commands/dropcmds.c
@@ -406,19 +406,27 @@ does_not_exist_skipping(ObjectType objtype, List *objname, List *objargs)
 			name = NameListToString(objname);
 			break;
 		case OBJECT_OPCLASS:
-			if (!schema_does_not_exist_skipping(objname, &msg, &name))
 			{
-				msg = gettext_noop("operator class \"%s\" does not exist for access method \"%s\", skipping");
-				name = NameListToString(objname);
-				args = strVal(linitial(objargs));
+				List *opcname = list_copy_tail(objname, 1);
+
+				if (!schema_does_not_exist_skipping(opcname, &msg, &name))
+				{
+					msg = gettext_noop("operator class \"%s\" does not exist for access method \"%s\", skipping");
+					name = NameListToString(opcname);
+					args = strVal(linitial(objname));
+				}
 			}
 			break;
 		case OBJECT_OPFAMILY:
-			if (!schema_does_not_exist_skipping(objname, &msg, &name))
 			{
-				msg = gettext_noop("operator family \"%s\" does not exist for access method \"%s\", skipping");
-				name = NameListToString(objname);
-				args = strVal(linitial(objargs));
+				List *opfname = list_copy_tail(objname, 1);
+
+				if (!schema_does_not_exist_skipping(opfname, &msg, &name))
+				{
+					msg = gettext_noop("operator family \"%s\" does not exist for access method \"%s\", skipping");
+					name = NameListToString(opfname);
+					args = strVal(linitial(objname));
+				}
 			}
 			break;
 		default:
diff --git a/src/backend/commands/event_trigger.c b/src/backend/commands/event_trigger.c
index 3fec57ea237..4bcc327a2b5 100644
--- a/src/backend/commands/event_trigger.c
+++ b/src/backend/commands/event_trigger.c
@@ -1060,6 +1060,8 @@ EventTriggerSupportsObjectType(ObjectType obtype)
 			/* no support for event triggers on event triggers */
 			return false;
 		case OBJECT_AGGREGATE:
+		case OBJECT_AMOP:
+		case OBJECT_AMPROC:
 		case OBJECT_ATTRIBUTE:
 		case OBJECT_CAST:
 		case OBJECT_COLUMN:
diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y
index cf0d31744e1..149962035dc 100644
--- a/src/backend/parser/gram.y
+++ b/src/backend/parser/gram.y
@@ -3950,8 +3950,7 @@ AlterExtensionContentsStmt:
 					n->extname = $3;
 					n->action = $4;
 					n->objtype = OBJECT_OPCLASS;
-					n->objname = $7;
-					n->objargs = list_make1(makeString($9));
+					n->objname = lcons(makeString($9), $7);
 					$$ = (Node *)n;
 				}
 			| ALTER EXTENSION name add_drop OPERATOR FAMILY any_name USING access_method
@@ -3960,8 +3959,7 @@ AlterExtensionContentsStmt:
 					n->extname = $3;
 					n->action = $4;
 					n->objtype = OBJECT_OPFAMILY;
-					n->objname = $7;
-					n->objargs = list_make1(makeString($9));
+					n->objname = lcons(makeString($9), $7);
 					$$ = (Node *)n;
 				}
 			| ALTER EXTENSION name add_drop SCHEMA name
@@ -5362,8 +5360,7 @@ DropOpClassStmt:
 			DROP OPERATOR CLASS any_name USING access_method opt_drop_behavior
 				{
 					DropStmt *n = makeNode(DropStmt);
-					n->objects = list_make1($4);
-					n->arguments = list_make1(list_make1(makeString($6)));
+					n->objects = list_make1(lcons(makeString($6), $4));
 					n->removeType = OBJECT_OPCLASS;
 					n->behavior = $7;
 					n->missing_ok = false;
@@ -5373,8 +5370,7 @@ DropOpClassStmt:
 			| DROP OPERATOR CLASS IF_P EXISTS any_name USING access_method opt_drop_behavior
 				{
 					DropStmt *n = makeNode(DropStmt);
-					n->objects = list_make1($6);
-					n->arguments = list_make1(list_make1(makeString($8)));
+					n->objects = list_make1(lcons(makeString($8), $6));
 					n->removeType = OBJECT_OPCLASS;
 					n->behavior = $9;
 					n->missing_ok = true;
@@ -5387,8 +5383,7 @@ DropOpFamilyStmt:
 			DROP OPERATOR FAMILY any_name USING access_method opt_drop_behavior
 				{
 					DropStmt *n = makeNode(DropStmt);
-					n->objects = list_make1($4);
-					n->arguments = list_make1(list_make1(makeString($6)));
+					n->objects = list_make1(lcons(makeString($6), $4));
 					n->removeType = OBJECT_OPFAMILY;
 					n->behavior = $7;
 					n->missing_ok = false;
@@ -5398,8 +5393,7 @@ DropOpFamilyStmt:
 			| DROP OPERATOR FAMILY IF_P EXISTS any_name USING access_method opt_drop_behavior
 				{
 					DropStmt *n = makeNode(DropStmt);
-					n->objects = list_make1($6);
-					n->arguments = list_make1(list_make1(makeString($8)));
+					n->objects = list_make1(lcons(makeString($8), $6));
 					n->removeType = OBJECT_OPFAMILY;
 					n->behavior = $9;
 					n->missing_ok = true;
@@ -5741,8 +5735,7 @@ CommentStmt:
 				{
 					CommentStmt *n = makeNode(CommentStmt);
 					n->objtype = OBJECT_OPCLASS;
-					n->objname = $5;
-					n->objargs = list_make1(makeString($7));
+					n->objname = lcons(makeString($7), $5);
 					n->comment = $9;
 					$$ = (Node *) n;
 				}
@@ -5750,8 +5743,8 @@ CommentStmt:
 				{
 					CommentStmt *n = makeNode(CommentStmt);
 					n->objtype = OBJECT_OPFAMILY;
-					n->objname = $5;
-					n->objargs = list_make1(makeString($7));
+					n->objname = lcons(makeString($7), $5);
+					n->objargs = NIL;
 					n->comment = $9;
 					$$ = (Node *) n;
 				}
@@ -7476,8 +7469,7 @@ RenameStmt: ALTER AGGREGATE func_name aggr_args RENAME TO name
 				{
 					RenameStmt *n = makeNode(RenameStmt);
 					n->renameType = OBJECT_OPCLASS;
-					n->object = $4;
-					n->objarg = list_make1(makeString($6));
+					n->object = lcons(makeString($6), $4);
 					n->newname = $9;
 					n->missing_ok = false;
 					$$ = (Node *)n;
@@ -7486,8 +7478,7 @@ RenameStmt: ALTER AGGREGATE func_name aggr_args RENAME TO name
 				{
 					RenameStmt *n = makeNode(RenameStmt);
 					n->renameType = OBJECT_OPFAMILY;
-					n->object = $4;
-					n->objarg = list_make1(makeString($6));
+					n->object = lcons(makeString($6), $4);
 					n->newname = $9;
 					n->missing_ok = false;
 					$$ = (Node *)n;
@@ -7924,8 +7915,7 @@ AlterObjectSchemaStmt:
 				{
 					AlterObjectSchemaStmt *n = makeNode(AlterObjectSchemaStmt);
 					n->objectType = OBJECT_OPCLASS;
-					n->object = $4;
-					n->objarg = list_make1(makeString($6));
+					n->object = lcons(makeString($6), $4);
 					n->newschema = $9;
 					n->missing_ok = false;
 					$$ = (Node *)n;
@@ -7934,8 +7924,7 @@ AlterObjectSchemaStmt:
 				{
 					AlterObjectSchemaStmt *n = makeNode(AlterObjectSchemaStmt);
 					n->objectType = OBJECT_OPFAMILY;
-					n->object = $4;
-					n->objarg = list_make1(makeString($6));
+					n->object = lcons(makeString($6), $4);
 					n->newschema = $9;
 					n->missing_ok = false;
 					$$ = (Node *)n;
@@ -8162,8 +8151,7 @@ AlterOwnerStmt: ALTER AGGREGATE func_name aggr_args OWNER TO RoleSpec
 				{
 					AlterOwnerStmt *n = makeNode(AlterOwnerStmt);
 					n->objectType = OBJECT_OPCLASS;
-					n->object = $4;
-					n->objarg = list_make1(makeString($6));
+					n->object = lcons(makeString($6), $4);
 					n->newowner = $9;
 					$$ = (Node *)n;
 				}
@@ -8171,8 +8159,7 @@ AlterOwnerStmt: ALTER AGGREGATE func_name aggr_args OWNER TO RoleSpec
 				{
 					AlterOwnerStmt *n = makeNode(AlterOwnerStmt);
 					n->objectType = OBJECT_OPFAMILY;
-					n->object = $4;
-					n->objarg = list_make1(makeString($6));
+					n->object = lcons(makeString($6), $4);
 					n->newowner = $9;
 					$$ = (Node *)n;
 				}
diff --git a/src/include/nodes/parsenodes.h b/src/include/nodes/parsenodes.h
index 50e98291bda..a5753539a30 100644
--- a/src/include/nodes/parsenodes.h
+++ b/src/include/nodes/parsenodes.h
@@ -1223,6 +1223,8 @@ typedef struct SetOperationStmt
 typedef enum ObjectType
 {
 	OBJECT_AGGREGATE,
+	OBJECT_AMOP,
+	OBJECT_AMPROC,
 	OBJECT_ATTRIBUTE,			/* type's attribute, when distinct from column */
 	OBJECT_CAST,
 	OBJECT_COLUMN,
diff --git a/src/test/regress/expected/object_address.out b/src/test/regress/expected/object_address.out
index 3bcbcd8b65f..365dcca7183 100644
--- a/src/test/regress/expected/object_address.out
+++ b/src/test/regress/expected/object_address.out
@@ -45,8 +45,7 @@ DECLARE
 	objtype text;
 BEGIN
 	FOR objtype IN VALUES ('toast table'), ('index column'), ('sequence column'),
-		('toast table column'), ('view column'), ('materialized view column'),
-		('operator of access method'), ('function of access method')
+		('toast table column'), ('view column'), ('materialized view column')
 	LOOP
 		BEGIN
 			PERFORM pg_get_object_address(objtype, '{one}', '{}');
@@ -62,8 +61,6 @@ WARNING:  error for sequence column: unsupported object type "sequence column"
 WARNING:  error for toast table column: unsupported object type "toast table column"
 WARNING:  error for view column: unsupported object type "view column"
 WARNING:  error for materialized view column: unsupported object type "materialized view column"
-WARNING:  error for operator of access method: unsupported object type "operator of access method"
-WARNING:  error for function of access method: unsupported object type "function of access method"
 DO $$
 DECLARE
 	objtype text;
@@ -79,7 +76,8 @@ BEGIN
 		('operator'), ('operator class'), ('operator family'), ('rule'), ('trigger'),
 		('text search parser'), ('text search dictionary'),
 		('text search template'), ('text search configuration'),
-		('policy'), ('user mapping'), ('default acl')
+		('policy'), ('user mapping'), ('default acl'),
+		('operator of access method'), ('function of access method')
 	LOOP
 		FOR names IN VALUES ('{eins}'), ('{addr_nsp, zwei}'), ('{eins, zwei, drei}')
 		LOOP
@@ -197,18 +195,18 @@ WARNING:  error for operator,{addr_nsp,zwei},{}: argument list length must be ex
 WARNING:  error for operator,{addr_nsp,zwei},{integer}: argument list length must be exactly 2
 WARNING:  error for operator,{eins,zwei,drei},{}: argument list length must be exactly 2
 WARNING:  error for operator,{eins,zwei,drei},{integer}: argument list length must be exactly 2
-WARNING:  error for operator class,{eins},{}: argument list length must be exactly 1
-WARNING:  error for operator class,{eins},{integer}: access method "integer" does not exist
-WARNING:  error for operator class,{addr_nsp,zwei},{}: argument list length must be exactly 1
-WARNING:  error for operator class,{addr_nsp,zwei},{integer}: access method "integer" does not exist
-WARNING:  error for operator class,{eins,zwei,drei},{}: argument list length must be exactly 1
-WARNING:  error for operator class,{eins,zwei,drei},{integer}: access method "integer" does not exist
-WARNING:  error for operator family,{eins},{}: argument list length must be exactly 1
-WARNING:  error for operator family,{eins},{integer}: access method "integer" does not exist
-WARNING:  error for operator family,{addr_nsp,zwei},{}: argument list length must be exactly 1
-WARNING:  error for operator family,{addr_nsp,zwei},{integer}: access method "integer" does not exist
-WARNING:  error for operator family,{eins,zwei,drei},{}: argument list length must be exactly 1
-WARNING:  error for operator family,{eins,zwei,drei},{integer}: access method "integer" does not exist
+WARNING:  error for operator class,{eins},{}: name list length must be at least 2
+WARNING:  error for operator class,{eins},{integer}: name list length must be at least 2
+WARNING:  error for operator class,{addr_nsp,zwei},{}: access method "addr_nsp" does not exist
+WARNING:  error for operator class,{addr_nsp,zwei},{integer}: access method "addr_nsp" does not exist
+WARNING:  error for operator class,{eins,zwei,drei},{}: access method "eins" does not exist
+WARNING:  error for operator class,{eins,zwei,drei},{integer}: access method "eins" does not exist
+WARNING:  error for operator family,{eins},{}: name list length must be at least 2
+WARNING:  error for operator family,{eins},{integer}: name list length must be at least 2
+WARNING:  error for operator family,{addr_nsp,zwei},{}: access method "addr_nsp" does not exist
+WARNING:  error for operator family,{addr_nsp,zwei},{integer}: access method "addr_nsp" does not exist
+WARNING:  error for operator family,{eins,zwei,drei},{}: access method "eins" does not exist
+WARNING:  error for operator family,{eins,zwei,drei},{integer}: access method "eins" does not exist
 WARNING:  error for rule,{eins},{}: rule "eins" does not exist
 WARNING:  error for rule,{eins},{integer}: rule "eins" does not exist
 WARNING:  error for rule,{addr_nsp,zwei},{}: relation "addr_nsp" does not exist
@@ -263,6 +261,18 @@ WARNING:  error for default acl,{addr_nsp,zwei},{}: argument list length must be
 WARNING:  error for default acl,{addr_nsp,zwei},{integer}: unrecognized default ACL object type i
 WARNING:  error for default acl,{eins,zwei,drei},{}: argument list length must be exactly 1
 WARNING:  error for default acl,{eins,zwei,drei},{integer}: unrecognized default ACL object type i
+WARNING:  error for operator of access method,{eins},{}: name list length must be at least 3
+WARNING:  error for operator of access method,{eins},{integer}: name list length must be at least 3
+WARNING:  error for operator of access method,{addr_nsp,zwei},{}: name list length must be at least 3
+WARNING:  error for operator of access method,{addr_nsp,zwei},{integer}: name list length must be at least 3
+WARNING:  error for operator of access method,{eins,zwei,drei},{}: argument list length must be exactly 2
+WARNING:  error for operator of access method,{eins,zwei,drei},{integer}: argument list length must be exactly 2
+WARNING:  error for function of access method,{eins},{}: name list length must be at least 3
+WARNING:  error for function of access method,{eins},{integer}: name list length must be at least 3
+WARNING:  error for function of access method,{addr_nsp,zwei},{}: name list length must be at least 3
+WARNING:  error for function of access method,{addr_nsp,zwei},{integer}: name list length must be at least 3
+WARNING:  error for function of access method,{eins,zwei,drei},{}: argument list length must be exactly 2
+WARNING:  error for function of access method,{eins,zwei,drei},{integer}: argument list length must be exactly 2
 -- these object types cannot be qualified names
 SELECT pg_get_object_address('language', '{one}', '{}');
 ERROR:  language "one" does not exist
@@ -332,10 +342,10 @@ WITH objects (type, name, args) AS (VALUES
 				('language', '{plpgsql}', '{}'),
 				-- large object
 				('operator', '{+}', '{int4, int4}'),
-				('operator class', '{int4_ops}', '{btree}'),
-				('operator family', '{integer_ops}', '{btree}'),
-				-- operator of access method
-				-- function of access method
+				('operator class', '{btree, int4_ops}', '{}'),
+				('operator family', '{btree, integer_ops}', '{}'),
+				('operator of access method', '{btree,integer_ops,1}', '{integer,integer}'),
+				('function of access method', '{btree,integer_ops,2}', '{integer,integer}'),
 				('rule', '{addr_nsp, genview, _RETURN}', '{}'),
 				('trigger', '{addr_nsp, gentable, t}', '{}'),
 				('schema', '{addr_nsp}', '{}'),
@@ -362,7 +372,7 @@ SELECT (pg_identify_object(addr1.classid, addr1.objid, addr1.subobjid)).*,
 	  FROM objects, pg_get_object_address(type, name, args) addr1,
 			pg_identify_object_as_address(classid, objid, subobjid) ioa(typ,nms,args),
 			pg_get_object_address(typ, nms, ioa.args) as addr2
-	ORDER BY addr1.classid, addr1.objid;
+	ORDER BY addr1.classid, addr1.objid, addr1.subobjid;
            type            |   schema   |       name        |                               identity                               | ?column? 
 ---------------------------+------------+-------------------+----------------------------------------------------------------------+----------
  default acl               |            |                   | for role regtest_addr_user in schema public on tables                | t
@@ -379,12 +389,14 @@ SELECT (pg_identify_object(addr1.classid, addr1.objid, addr1.subobjid)).*,
  index                     | addr_nsp   | gentable_pkey     | addr_nsp.gentable_pkey                                               | t
  view                      | addr_nsp   | genview           | addr_nsp.genview                                                     | t
  materialized view         | addr_nsp   | genmatview        | addr_nsp.genmatview                                                  | t
- foreign table column      | addr_nsp   | genftable         | addr_nsp.genftable.a                                                 | t
  foreign table             | addr_nsp   | genftable         | addr_nsp.genftable                                                   | t
+ foreign table column      | addr_nsp   | genftable         | addr_nsp.genftable.a                                                 | t
  role                      |            | regtest_addr_user | regtest_addr_user                                                    | t
  server                    |            | addr_fserv        | addr_fserv                                                           | t
  user mapping              |            |                   | regtest_addr_user on server integer                                  | t
  foreign-data wrapper      |            | addr_fdw          | addr_fdw                                                             | t
+ operator of access method |            |                   | operator 1 (integer, integer) of pg_catalog.integer_ops USING btree  | t
+ function of access method |            |                   | function 2 (integer, integer) of pg_catalog.integer_ops USING btree  | t
  default value             |            |                   | for addr_nsp.gentable.b                                              | t
  cast                      |            |                   | (bigint AS integer)                                                  | t
  table constraint          | addr_nsp   |                   | a_chk on addr_nsp.gentable                                           | t
@@ -403,7 +415,7 @@ SELECT (pg_identify_object(addr1.classid, addr1.objid, addr1.subobjid)).*,
  text search parser        | addr_nsp   | addr_ts_prs       | addr_nsp.addr_ts_prs                                                 | t
  text search configuration | addr_nsp   | addr_ts_conf      | addr_nsp.addr_ts_conf                                                | t
  text search template      | addr_nsp   | addr_ts_temp      | addr_nsp.addr_ts_temp                                                | t
-(38 rows)
+(40 rows)
 
 ---
 --- Cleanup resources
diff --git a/src/test/regress/sql/object_address.sql b/src/test/regress/sql/object_address.sql
index a49f03fdf7d..9cf80971241 100644
--- a/src/test/regress/sql/object_address.sql
+++ b/src/test/regress/sql/object_address.sql
@@ -48,8 +48,7 @@ DECLARE
 	objtype text;
 BEGIN
 	FOR objtype IN VALUES ('toast table'), ('index column'), ('sequence column'),
-		('toast table column'), ('view column'), ('materialized view column'),
-		('operator of access method'), ('function of access method')
+		('toast table column'), ('view column'), ('materialized view column')
 	LOOP
 		BEGIN
 			PERFORM pg_get_object_address(objtype, '{one}', '{}');
@@ -75,7 +74,8 @@ BEGIN
 		('operator'), ('operator class'), ('operator family'), ('rule'), ('trigger'),
 		('text search parser'), ('text search dictionary'),
 		('text search template'), ('text search configuration'),
-		('policy'), ('user mapping'), ('default acl')
+		('policy'), ('user mapping'), ('default acl'),
+		('operator of access method'), ('function of access method')
 	LOOP
 		FOR names IN VALUES ('{eins}'), ('{addr_nsp, zwei}'), ('{eins, zwei, drei}')
 		LOOP
@@ -141,10 +141,10 @@ WITH objects (type, name, args) AS (VALUES
 				('language', '{plpgsql}', '{}'),
 				-- large object
 				('operator', '{+}', '{int4, int4}'),
-				('operator class', '{int4_ops}', '{btree}'),
-				('operator family', '{integer_ops}', '{btree}'),
-				-- operator of access method
-				-- function of access method
+				('operator class', '{btree, int4_ops}', '{}'),
+				('operator family', '{btree, integer_ops}', '{}'),
+				('operator of access method', '{btree,integer_ops,1}', '{integer,integer}'),
+				('function of access method', '{btree,integer_ops,2}', '{integer,integer}'),
 				('rule', '{addr_nsp, genview, _RETURN}', '{}'),
 				('trigger', '{addr_nsp, gentable, t}', '{}'),
 				('schema', '{addr_nsp}', '{}'),
@@ -171,7 +171,7 @@ SELECT (pg_identify_object(addr1.classid, addr1.objid, addr1.subobjid)).*,
 	  FROM objects, pg_get_object_address(type, name, args) addr1,
 			pg_identify_object_as_address(classid, objid, subobjid) ioa(typ,nms,args),
 			pg_get_object_address(typ, nms, ioa.args) as addr2
-	ORDER BY addr1.classid, addr1.objid;
+	ORDER BY addr1.classid, addr1.objid, addr1.subobjid;
 
 ---
 --- Cleanup resources