T
CLASS="STRUCTFIELD"
>tg_newtuple</TT
></DT
><DD
><P
>        A pointer to the new version of the row, if the trigger was
        fired for an <TT
CLASS="COMMAND"
>UPDATE</TT
>, and <TT
CLASS="SYMBOL"
>NULL</TT
> if
        it is for an <TT
CLASS="COMMAND"
>INSERT</TT
> or a
        <TT
CLASS="COMMAND"
>DELETE</TT
>. This is what you have to return
        from the function if the event is an <TT
CLASS="COMMAND"
>UPDATE</TT
>
        and you don't want to replace this row by a different one or
        skip