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From "Jacek Laskowski" <>
Subject Re: @Column with precision and scale - how does it work?
Date Tue, 10 Apr 2007 20:32:38 GMT
On 4/10/07, Michael Dick <> wrote:
> I don't think Derby supports specifying the precision on type DOUBLE (maybe
> other datbases do).

You're right - it doesn't.

> You should be able to specify the precision through the @Column annotation.
> I believe @Column(columnDefinition="DECIMAL(5,2)") will
> work.

DECIMAL is a synonim of NUMERIC and either works well.

> I'm not sure whether precision=x, scale=y with a type that maps to
> DECIMAL instead of DOUBLE.

That's my question how OpenJPA recognizes whether the attributes
should be used or not. I don't think precision and scale are not used
at all.


Jacek Laskowski

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