DB 1.86 Patches

1. Problem: DB 1.86 compiles on IRIX, but fails to pass the tests.
   

   A UNIX mailbox with the patches to make DB version 1.86 run on current IRIX systems.

    

2. Problem: DB 1.86 compiles on Linux but fails to load, displaying an error message that there's no lorder command.
   
   

   Apply the following patch to the Linux Makefile.

   *** Makefile.orig       Wed Jul 13 21:43:16 1994
   --- Makefile    Wed Dec 31 19:00:00 1969
   ***************
   *** 15,22 ****
     
     ${LIBDB}: ${OBJ1} ${OBJ2} ${OBJ3} ${OBJ4} ${OBJ5} ${MISC}
           rm -f $@
   !       ar cq $@ \
   !           `lorder ${OBJ1} ${OBJ2} ${OBJ3} ${OBJ4} ${OBJ5} ${MISC} | tsort`
           ranlib $@
     
     clean:
   --- 15,21 ----
     
     ${LIBDB}: ${OBJ1} ${OBJ2} ${OBJ3} ${OBJ4} ${OBJ5} ${MISC}
           rm -f $@
   !       ar cq $@ ${OBJ1} ${OBJ2} ${OBJ3} ${OBJ4} ${OBJ5} ${MISC}
           ranlib $@
     
     clean:
   

    

3. Problem: DB 1.86 core dumps on certain data sets when using the B+tree access method.
   

   Apply the following patch to the db-1.86/btree/bt_split.c file.

   *** btree/bt_split.c.orig       Sat Feb  8 10:14:10 1997
   --- btree/bt_split.c    Sat Feb  8 10:14:51 1997
   ***************
   *** 673,679 ****
                    * where we decide to try and copy too much onto the left page.
                    * Make sure that doesn't happen.
                    */
   !               if (skip <= off && used + nbytes >= full || nxt == top - 1) {
                           --off;
                           break;
                   }
   --- 673,680 ----
                    * where we decide to try and copy too much onto the left page.
                    * Make sure that doesn't happen.
                    */
   !               if (skip <= off &&
   !                   used + nbytes + sizeof(indx_t) >= full || nxt == top - 1) {
                           --off;
                           break;
                   }
   ***************
   *** 686,692 ****
                           memmove((char *)l + l->upper, src, nbytes);
                   }
     
   !               used += nbytes;
                   if (used >= half) {
                           if (!isbigkey || bigkeycnt == 3)
                                   break;
   --- 687,693 ----
                           memmove((char *)l + l->upper, src, nbytes);
                   }
     
   !               used += nbytes + sizeof(indx_t);
                   if (used >= half) {
                           if (!isbigkey || bigkeycnt == 3)
                                   break;
   

    

4. Problem: The metadata page for DB 1.86 B+tree databases is not correctly maintained in some circumstances.
   

   Apply the following patch to the db-1.86/btree/bt_page.c file.

   *** btree/bt_page.c.orig        Wed Jul 13 21:29:02 1994
   --- btree/bt_page.c     Wed Jun 11 20:14:43 1997
   ***************
   *** 65,70 ****
   --- 65,71 ----
           h->prevpg = P_INVALID;
           h->nextpg = t->bt_free;
           t->bt_free = h->pgno;
   +       F_SET(t, B_METADIRTY);
     
           /* Make sure the page gets written back. */
           return (mpool_put(t->bt_mp, h, MPOOL_DIRTY));
   ***************
   *** 92,97 ****
   --- 93,99 ----
               (h = mpool_get(t->bt_mp, t->bt_free, 0)) != NULL) {
                   *npg = t->bt_free;
                   t->bt_free = h->nextpg;
   +               F_SET(t, B_METADIRTY);
                   return (h);
           }
           return (mpool_new(t->bt_mp, npg));