Re: Can Bind variables be an issue with respect to network transfer?

or it is a collection. This is btw. quite often very efficient , because the optimizer can do a hash join.
http://www.oracle-developer.net/display.php?id=301

Thanks

Lothar

Am 14.10.2020 um 16:12 schrieb Jonathan Lewis:
>
> Nenad,
>
> That's a TIL for me. Never thought of it before.
> Thanks.
>
> Jonathan Lewis
>
>
> On Wed, 14 Oct 2020 at 15:05, Noveljic Nenad
> <nenad.noveljic_at_vontobel.com <mailto:nenad.noveljic_at_vontobel.com>> wrote:
>
> “An IN list is limited to 1,000”
>
> Unless it’s a multi-value IN list, which is limited to 1e5 elements.
>
> Best regards,
>
> Nenad
>
> *From:*oracle-l-bounce_at_freelists.org
> <mailto:oracle-l-bounce_at_freelists.org>
> <oracle-l-bounce_at_freelists.org
> <mailto:oracle-l-bounce_at_freelists.org>> *On Behalf Of *Jonathan Lewis
> *Sent:* Mittwoch, 14. Oktober 2020 16:00
> *To:* Oracle L <oracle-l_at_freelists.org
> <mailto:oracle-l_at_freelists.org>>
> *Subject:* Re: Re: Can Bind variables be an issue with respect to
> network transfer?
>
> Lothar,
>
> Comparing the ela for the "PGA allocate memory" with the matching
> "tim=" I think what you're seeing is the time it takes Oracle to
> build an array and copy data from the SQL*Net packet to the array.
> Obviously some of the difference is about the time to write to the
> trace file, even so there's a lot of other CPU to account for.and
> it's happening between the memory allocations.  I doubt if
> "traffic" (i.e. movement across the network) is relevant - the ns
> calls are probably a layer above that moving the data between the
> sql*net layer and the session layer.
>
> I am curious about the internal_function() and 4,700 variables. 
> An IN list is limited to 1,000 and I wouldn't have expected an OR
> of IN lists to turn into a single internal_function(), Perhaps
> there's something about data types and character set conversion
> (or some other conversion) that's adding to the CPU time.
>
> Regards
>
> Jonathan Lewis
>
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