Re: Add 64-bit XIDs into PostgreSQL 15

Re: clog page numbers, as returned by TransactionIdToPage

-    int            pageno = TransactionIdToPage(xid);    /* get page of parent */
+    int64        pageno = TransactionIdToPage(xid);    /* get page of parent */

...

-    int            pageno = TransactionIdToPage(subxids[0]);
+    int64        pageno = TransactionIdToPage(subxids[0]);
     int            offset = 0;
     int            i = 0;
 
...

-        int            nextpageno;
+        int64        nextpageno;

Etc.

In all those places where you are replacing int with int64 for the kind of values returned by TransactionIdToPage(),
wouldyou mind replacing the int64's with a type name, such as ClogPageNumber, for improved code maintainability?