> 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

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