diff --git a/src/backend/executor/execMain.c b/src/backend/executor/execMain.c
new file mode 100644
index 2946a0e..15694e9
*** a/src/backend/executor/execMain.c
--- b/src/backend/executor/execMain.c
*************** ExecCheckXactReadOnly(PlannedStmt *plann
*** 783,788 ****
--- 783,791 ----
  		if ((rte->requiredPerms & (~ACL_SELECT)) == 0)
  			continue;
  
+ 		if (rte->relkind == 'f')
+ 			continue;
+ 
  		if (isTempNamespace(get_rel_namespace(rte->relid)))
  			continue;