>PL/pgSQL</SPAN
> interpreter parses the function's source
    text and produces an internal binary instruction tree the first time the
    function is called (within each session).  The instruction tree
    fully translates the
    <SPAN
CLASS="APPLICATION"
>PL/pgSQL</SPAN
> statement structure, but individual
    <ACRONYM
CLASS="ACRONYM"
>SQL</ACRONYM
> expressions and <ACRONYM
CLASS="ACRONYM"
>SQL</ACRONYM
> commands
    used in the function are not translated immediately.
   </P
><P
>    
    As each ex