 the <SPAN
CLASS="APPLICATION"
>libpq</SPAN
> is thread-safe
      and 0 if it is not.
     </P
></DD
></DL
></DIV
><P
>   One thread restriction is that no two threads attempt to manipulate
   the same <TT
CLASS="STRUCTNAME"
>PGconn</TT
> object at the same time. In particular,
   you cannot issue concurrent commands from different threads through
   the same connection object. (If you need to run concurrent commands,
   use multiple connections.)
  </P
><P
>   <TT
CLASS="STRUCTNAME"
>PGresult</TT
> object