<P
>   Furthermore, immediately before reporting a uniqueness violation
   according to the above rules, the access method must recheck the
   liveness of the row being inserted.  If it is committed dead then
   no violation should be reported.  (This case cannot occur during the
   ordinary scenario of inserting a row that's just been created by
   the current transaction.  It can happen during
   <TT
CLASS="COMMAND"
>CREATE UNIQUE INDEX CONCURRENTLY</TT
>, however.)
  </P
><P
>   We require the index acce