Addresses #1031

Implements lazy updates for next_shortcut, and prev_shortcut.


git-svn-id: file:///svn/tokudb@5221 c7de825b-a66e-492c-adef-691d508d4ae1

newbrt/brt-internal.h

@@ -205,6 +205,7 @@ unsigned int toku_brtnode_pivot_key_len (BRTNODE, struct kv_pair *); // Given th
 struct brt_cursor {
     struct list cursors_link;
     BRT brt;
+    BOOL current_in_omt, prev_in_omt;
     DBT key, val;             // The key-value pair that the cursor currently points to
     DBT prevkey, prevval;     // The key-value pair that the cursor pointed to previously.  (E.g., when we do a DB_NEXT)
     int is_temporary_cursor;  // If it is a temporary cursor then use the following skey and sval to return tokudb-managed values in dbts.  Otherwise use the brt's skey and skval.

newbrt/omt.c

@@ -628,7 +628,7 @@ int toku_omt_cursor_prev (OMTCURSOR c, OMTVALUE *v) {
     }
     c->index--;
     int r = toku_omt_fetch(c->omt, c->index, v, NULL);
-    if (r!=0) toku_omt_cursor_invalidate(c);
+    assert(r==0);
     return r;
 }