in
   which the index might be inconsistent with the heap.  We handle this problem
   with the following rules:

    <P
></P
></P><UL
><LI
><P
>       A new heap entry is made before making its index entries.  (Therefore
       a concurrent index scan is likely to fail to see the heap entry.
       This is okay because the index reader would be uninterested in an
       uncommitted row anyway.  But see <A
HREF="index-unique-checks.html"
>Section 54.5</A
>.)
      </P
></LI
><LI
><P
>       When a heap entry