L's <TT
CLASS="LITERAL"
>EXECUTE</TT
>
      (Heikki Linnakangas, Tom Lane)
     </P
><P
>      Remove some data-copying overhead that was added in 9.2 as a
      consequence of revisions in the plan caching mechanism.  This
      eliminates a performance regression compared to 9.1, and also saves
      memory, especially when the query string to be executed contains many
      SQL statements.
     </P
><P
>      A side benefit is that multi-statement query strings are now
      processed fully serially, th