 be the owner of
   the index.
  </P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN75992"
></A
><H2
>Parameters</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="LITERAL"
>CONCURRENTLY</TT
></DT
><DD
><P
>      Drop the index without locking out concurrent selects, inserts, updates,
      and deletes on the index's table.  A normal <TT
CLASS="COMMAND"
>DROP INDEX</TT
>
      acquires exclusive lock on the table, blocking other accesses until the
      index drop can be completed.  With this option,