Fixes postgres 14 errors

src/backend/distributed/metadata/metadata_sync.c

@@ -4725,8 +4725,10 @@ PropagateNodeWideObjectsCommandList(void)
 		List *alterRoleSetCommands = GenerateAlterRoleSetCommandForRole(InvalidOid);
 		ddlCommands = list_concat(ddlCommands, alterRoleSetCommands);
 	}
+#if PG_VERSION_NUM >= PG_VERSION_15
 	List *grantOnParameterCommands = GrantOnParameters();
 	ddlCommands = list_concat(ddlCommands, grantOnParameterCommands);
+#endif /* PG_VERSION_NUM >= PG_VERSION_15 */
 
 	return ddlCommands;
 }

src/include/distributed/grant_utils.h

@@ -12,7 +12,10 @@
 
 #include "nodes/parsenodes.h"
 
+#if PG_VERSION_NUM >= PG_VERSION_15
 extern List * GrantOnParameters(void);
+#endif /* PG_VERSION_NUM >= PG_VERSION_15 */
+
 extern char * GenerateSetRoleQuery(Oid roleOid);
 extern GrantStmt * GenerateGrantStmtForRights(ObjectType objectType,
 											  Oid roleOid,

src/test/regress/expected/grant_on_parameter_propagation_0.out

@@ -0,0 +1,9 @@
+--
+-- PG15
+--
+SHOW server_version \gset
+SELECT substring(:'server_version', '\d+')::int >= 15 AS server_version_ge_15
+\gset
+\if :server_version_ge_15
+\else
+\q