Re: Fetch table names from query

From: Dan Blum <>
Date: Wed, 21 May 2008 18:59:02 +0000 (UTC)
Message-ID: <g11rdm$qv3$>

DA Morgan <> wrote:
> ?lvaro G. Vicario wrote:
> > Is there any simple way to extract the table names of a given SELECT
> > query without actually running it?
> >
> > I've implemented a very simple results cache in my PHP application but
> > I'd like to improve it. And one of the key points is finding out what
> > tables a query reads from so I can handle obsolete data. Writing a
> > reliable SQL parser in PHP looks like a hard task and obtaining a full
> > explain plan from the Oracle server looks like an overkill.
> >
> > Any ideas?
> >
> > Thank you in advance,

> This is horrifying. Obsolete data is defined by an SLA with the customer
> not by whether it is accessed.

> For example I have organizations here in the US that are, by law,
> required to keep data online for 7 years. It hopefully will never be
> accessed. But on audit, if it isn't there, they are in a boatload of
> trouble.

> This is a really bad idea, for many reasons, you should drop
> immediately. Leave managing the database to the database professionals.
> It is not something someone writing PHP should involve themselves in.

I think he means he wants to identify obsolete data in his results cache, so he can refresh it from the database, not delete data from the database.

However, I agree that this is not a wonderful idea, as it is essentially recreating Oracle functionality. If results caching is that critical, I would suggest running 11g, which implements it.

Dan Blum					
"I wouldn't have believed it myself if I hadn't just made it up."
Received on Wed May 21 2008 - 13:59:02 CDT

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