 <TT
CLASS="TYPE"
>numeric</TT
> column, or changing a column from constrained
        <TT
CLASS="TYPE"
>numeric</TT
> to unconstrained <TT
CLASS="TYPE"
>numeric</TT
>, no longer
        requires a table rewrite.  Table rewrites are also avoided in similar
        cases involving the <TT
CLASS="TYPE"
>interval</TT
>, <TT
CLASS="TYPE"
>timestamp</TT
>, and
        <TT
CLASS="TYPE"
>timestamptz</TT
> types.
       </P
></LI
><LI
><P
>        Avoid having <A
HREF="sql-altertable.html"
><TT
CLASS="COMMAND"
>ALT