Tom Lane wrote:
> Klint Gore <kgore4@une.edu.au> writes:
> > David Wilson wrote:
> >> I'm not certain how to check the actual byte width of a column within a
> >> row,
>
> > select length(bytea_field) from table
>
> If you want the actual on-disk footprint, use pg_column_size()
>
>
Size on disk would have the compression from the default storage =
extended wouldn't it?
I verified it for myself manually anyway.
copy (select * from original limit 5) to stdout with csv;
create table foo (like original);
alter table foo alter column bytea_field set storage external;
copy foo from stdin with csv;
select |reltoastrelid from pg_class where relanem = 'original'
found the file for it and looked at it with a hex viewer.
|
klint.
--
Klint Gore
Database Manager
Sheep CRC
A.G.B.U.
University of New England
Armidale NSW 2350
Ph: 02 6773 3789
Fax: 02 6773 3266
EMail: kgore4@une.edu.au