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Content preview: hi, On Tue, 20 Aug 2002 17:09:23 +0200, "Christoph
Sturm" <[EMAIL PROTECTED]> said: > ----- Original Message ----- > From:
<Gavin_King/[EMAIL PROTECTED]> > > > This would be very
cool. How do you propose to implement it? Diffing two > > "create
table" statements? Diffing two mapping documents? Diffing against > >
JDBC metadata? > > I was thinking about diffing against jdbc metadata.
What I had in mind was > an automatic check of the database metadata
when hibernate starts up, and > automatic execution of ddf statements
that add missing columns and tables. [...]
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--- Begin Message ---
hi,
On Tue, 20 Aug 2002 17:09:23 +0200, "Christoph Sturm" <[EMAIL PROTECTED]>
said:
> ----- Original Message -----
> From: <Gavin_King/[EMAIL PROTECTED]>
>
> > This would be very cool. How do you propose to implement it? Diffing two
> > "create table" statements? Diffing two mapping documents? Diffing against
> > JDBC metadata?
>
> I was thinking about diffing against jdbc metadata. What I had in mind was
> an automatic check of the database metadata when hibernate starts up, and
> automatic execution of ddf statements that add missing columns and tables.
even this poses some problems, eg. when you're trying to add a NOT NULL
column... also, renaming a column would not be recognized... so i think
the closest you can get is a schema comparison, and a default alter
script, which you have to tweak manually. still comes handy though, but
has not much to do with hibernate itself i guess :)
viktor
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