Re: Optimize external TOAST storage

+            /* incompressible, ignore on subsequent compression passes. */
+            orig_attr->tai_colflags |= TOASTCOL_INCOMPRESSIBLE;

Do we need to set TOASTCOL_INCOMPRESSIBLE while trying to externalize
it, the comment say "ignore on subsequent compression passes"
but after this will there be more compression passes?  If we need to

set this TOASTCOL_INCOMPRESSIBLE then comment should explain this.