Subject | Re: [firebird-support] Re: How to update table structure with SQL? |
---|---|
Author | Flávio Costa |
Post date | 2009-06-23T10:53:45Z |
No, it's for metadata. The data stay untouched.
On Mon, Jun 22, 2009 at 23:58, neighbour.kerry <kerry@...>wrote:
>
>
> --- In firebird-support@yahoogroups.com<firebird-support%40yahoogroups.com>,
> Flávio Costa <fcosta75@...> wrote:
> >
> > You could use a component set to sync databases.
> >
>
> Isn't that for syncing data? If that is so, then I certainly do NOT want to
> do that. I cannot touch the existing data in the customer tables.
>
> All I really need to do is add new columns to existing tables, or create
> any new tables.
>
> I have Indexes, Triggers, Generators and Procedures worked out. I simply
> DROP them all - then recreate them all with my script. Since this does not
> affect customer data, it works just fine.
>
> But this does not work for tables and columns. There does not seem to be
> any way to check if a table or column exists.
>
> I am currently doing all this stuff in Delphi. ie, I read in the metadata
> (using Delphi), then check, using Delphi, if a table exists. If it does, I
> feed out the ALTER script - if it does not, I feed out the CREATE script. It
> works, but it is a very poor way to do it!
>
> I now need to do the same with columns, and I can do it the same way in
> Delphi, but I would rather do everything with a Firebird SQL statement. Much
> more portable, and probably quicker.
>
>
>
[Non-text portions of this message have been removed]