For some relations The end result is the same as pg_class.relfilenode, but for specific process catalogs relfilenode is zero which function has to be accustomed to get the proper benefit. The purpose returns NULL if handed a relation that doesn't have storage, like a look at. con เท่านั้น อย่ารอช้า รีบชวนเพื่อนของท่าน https://xiaopingh306sts3.blogrenanda.com/profile