On 2009-10-09, Peter Eisentraut <pete...@gmx.net> wrote: > On Fri, 2009-10-09 at 11:46 -0700, Christophe Pettus wrote: >> Domains are basically type aliases with an optional CHECK clause, so >> you could do something like: >> >> CREATE DOMAN sales_tax_rate AS DECIMAL(5,5) CHECK (VALUE >= 0); >> >> Then, you can use the type "sales_tax_rate" in your tables, etc. just >> as a normal first-class type. (The only limitation, right now, is >> that you can't create an array of them.) > > Actually I wouldn't bother with the precision and scale at all. I'd go > with something like > > CREATE DOMAN sales_tax_rate AS DECIMAL CHECK (VALUE >= 0 AND VALUE <=1);
why the latter check ( VALUE <=1 )? -- Sent via pgsql-general mailing list (pgsql-general@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
