Re: Help converting Oracle instead of triggers to PostgreSQL

Just to follow up I managed to track down these missing articles and have
updated the links on the website.

Robert Treat

On Thursday 04 December 2003 12:52, Clint Stotesbery wrote:
> Hi Christoph,
> Thanks for the links but the techdoc links for converting from Oracle to
> PostgreSQL has 2 links that don't go to their intended targets anymore, one
> is in the 7.3 docs which is really limited (only covers simple things), and
> the Ora2Pg one I don't really get that well.
>
> As far as updateable views, that's why you need instead of triggers.
> Regular triggers can't be done on views. So if I make an instead of trigger
> on a view that's for updates then I have an updateable view. I figured it
> out last night and I was along the right track in my original post with
> using an instead of rule to call a function. The trick is that I have to
> pass in all the old.col and new.col stuff into the function that I call
> from the rule. In Oracle since the instead of stuff is a trigger I had
> access to the new.col and old.col stuff. To do it in PostgreSQL rules I had
> to pass it all in. I'm going to write a doc about the problems I've
> encountered during my conversion project and then submit it to the Postgres
> people I think (to who though?). My programming and tech writing background
> should help I hope. Thanks for the suggestions Christoph.
> -Clint
>
>
> ----Original Message Follows----
> From: Christoph Haller <ch(at)rodos(dot)fzk(dot)de>
> To: cstotesbery(at)acm(dot)org
> CC: pgsql-sql(at)postgresql(dot)org
> Subject: Re: [SQL] Help converting Oracle instead of triggers to PostgreSQL
> Date: Thu, 04 Dec 2003 17:16:32 MET
>
> Not sure if this is of any help ...
> AFAIK there are no updatable views in pg.
> But aside from that, I cannot see nothing what could not be
> done by a pg trigger function:
> CREATE TRIGGER name { BEFORE | AFTER } { event [OR ...] }
> ON table FOR EACH { ROW | STATEMENT }
> EXECUTE PROCEDURE func ( arguments )
>
> Also try
>
> http://techdocs.postgresql.org/#convertfrom
>
> Converting from other Databases to PostgreSQL
>
> and/or
>
> http://openacs.org/search/search?q=oracle+to+pg+porting&t=Search
>
> HTH
>
> Regards, Christoph
>
>
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