"Mark Woodward" <pgsql@mohawksoft.com> writes:
> I'm using 8.1.4. The "rdate" field looks something like: "2005-09-06" So,
> the raw data is 23 bytes, the date string will probably be rounded up to
> 12 bytes, that's 24 bytes per row of data. What is the overhead per
> variable? per row?
>
> Is there any advantage to using "varchar(10)" over "text" ?
I'll second the "use a date" comment.
But to answer the questions, text and varchar are handled identically in
almost every respect. The overhead per variable width field (like text or
varchar) is 4 bytes. The overhead per row depends on a few factors, but figure
28 bytes.
-- Gregory Stark EnterpriseDB http://www.enterprisedb.com