Enclosed below I have a patch to allow a btree index on the int8 type.

I would like some feedback on what the hash function for the int8 hash
function
in the ./backend/access/hash/hashfunc.c should return.

Also, could someone (maybe Tomas Lockhart?) look-over the patch and make
sure
the system table entries are correct?  I've tried to research them as
much as I
could, but some of them are still not clear to me.

Thanks,
-Ryan

src/backend/access/hash/hashfunc.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/access/hash/hashfunc.c,v 1.13 1999/02/13 23:14:18 momjian Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/access/hash/hashfunc.c,v 1.14 1999/03/14 05:08:55 momjian Exp $
  *
  * NOTES
  *	  These functions are stored in pg_amproc.	For each operator class
@@ -32,6 +32,12 @@ hashint4(uint32 key)
 	return ~key;
 }
 
+uint32
+hashint8(uint64 *key)
+{
+	return ~((uint32)key);
+}
+
 /* Hash function from Chris Torek. */
 uint32
 hashfloat4(float32 keyp)