red
       recheck of a row that was reported as a potential uniqueness violation.
       Although this is implemented by calling <CODE
CLASS="FUNCTION"
>aminsert</CODE
>, the
       access method must <SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>not</I
></SPAN
> insert a new index entry in this
       case.  The index entry is already present.  Rather, the access method
       must check to see if there is another live index entry.  If so, and
       if the target row is also still live, report error.
    