Jeff:
> As far as I know there is only a small win when you want to extract some
> field from a tuple and with variable width fields you have to walk to the
> correct field. But this is a small performance problem unless you have
> very many variable size columns in the table.
BTW, Dennis here is not talking about CHAR; CHAR is handled as a
variable-length field in Postgres. INTEGER is a fixed-width field.
--
-Josh Berkus
Aglio Database Solutions
San Francisco