S Lemmon writes:
> Sinisa Milivojevic wrote:
> >
> > Hi!
> >
> > With :
> >
> > select * from table;
> >
> > queries MySQL returns results immediately.
> >
> > Any problem that you experience might come only from poor build, some
> > OS bug or some wrong settings.
>
> Thanks for the reply! That's good to know at least. I really didn't
> know
> if anything was wrong or not.
>
> I've been looking through the docs and the list for a few days, but it's
> tricky when you don't really know what to look for (searching for
> stuff like "select" and "pause" doesn't help much ;-). However, I
> think I finally stumbled upon at least part of my problem... It's
> "mysql_store_result" vs. "mysql_use_result"!
>
> Since both Perl's DBI and the mysql command use "mysql_store_result" by
> default, all rows are buffered up before being returned - the more rows
> the longer the delay. Informix behaves more like "mysql_use_result"
> where results are returned as they are found.
>
> The other problem is the delay when closing a select early. From what I
> gather it seems like it's not possible to abort a select without first
> reading all the rows. I'm guessing the mysql client and Perl DBI both
> hide this by just doing the equivalent of sending what remains to
> /dev/null (hence the delay).
>
> I guess it's not really a problem now that I know what to expect. I
> just have to remember to include limits on all my selects. It's just a
> bit of a re-think since until recently, Informix had no statement like
> LIMIT and it's normal to simply close the cursor (finish() under DBI)
> once you've found what you're after.
>
> Thanks,
>
> S. Lemmon
Hi!
Use mysql_use_result and both of the above problems will be resolved.
Regards,
Sinisa
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