te.
     </P
><P
>      In addition, fix <TT
CLASS="COMMAND"
>CREATE/DROP INDEX CONCURRENTLY</TT
> to use
      in-place updates when changing the state of an index's
      <TT
CLASS="STRUCTNAME"
>pg_index</TT
> row.  This prevents race conditions that could
      cause concurrent sessions to miss updating the target index, thus
      again resulting in corrupt concurrently-created indexes.
     </P
><P
>      Also, fix various other operations to ensure that they ignore
      invalid indexes resulting from