Re: Best way to simulate Booleans

On Tue, 2009-07-07 at 00:13 -0600, Scott Marlowe wrote:
> On Mon, Jul 6, 2009 at 7:22 PM, Peter Headland<pheadland(at)actuate(dot)com> wrote:
> > I know, I know, PostgreSQL has Booleans that work very nicely.
> > Unfortunately, I have to create a schema that will work on Oracle as well as
> > PostgreSQL, by which I mean that a single set of Java/JDBC code has to work
> > with both databases. I have an XML meta-schema that enables me to generate
> > appropriate DDL; that handles all the INTEGER vs. NUMBER(m,n) stuff. But
> > Oracle simply has no Booleans, so I will have to resort to some more or less
> > ugly alternative. I am hoping that others here have had to deal with this
> > and can suggest an approach that will be minimally loathsome.
>
> mybool int check (mybool >=0 and <=1)

Integer works best since it converts easily to boolean

mybool smallint check (mybool in (0, 1))

You can use "char" also, but the syntax is less clear.

--
Simon Riggs www.2ndQuadrant.com
PostgreSQL Training, Services and Support