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

Even though you declared the variable as CLOB, I'm guessing that there might be a VARCHAR2(32767) limitation for EXECUTE IMMEDIATE?

Can you measure the length of "stmt" before EXECUTE IMMEDIATE and add an exception handler that shares that length as well as the error, perhaps something like...

            len := length(stmt);
            execute immediate stmt;
     exception
           when others then
                   dbms_output.put_line('len = '||len);
                   raise;
     end;
     /

Just an idea...

On 10/14/2020 9:07 AM, rogel_at_web.de wrote:
> ok, "line 4" != "line 7"
> *Gesendet:* Mittwoch, 14. Oktober 2020 um 18:04 Uhr
> *Von:* rogel_at_web.de
> *An:* nenad.noveljic_at_vontobel.com
> *Cc:* "jlewisoracle_at_gmail.com" <jlewisoracle_at_gmail.com>, "Oracle L"
> <oracle-l_at_freelists.org>
> *Betreff:* Aw: RE: Re: Can Bind variables be an issue with respect to
> network transfer?
> I am not able to reproduce this 1e5, for me it seems to be 3760
> instead, see (note: execute immediate select-stmt just parses the
> select-stmt)
> *declare stmt clob default 'select null from dual where (0,0) in (';
> begin
> for i in 1..3760 loop
> stmt:=stmt||'(0,'||i||'),';
> end loop;
> stmt:=stmt||'(0,-1))';
> execute immediate stmt;
> end;
> /*
> *PL/SQL procedure successfully completed.*
> *3
>   3* for i in 1..3760 loop
> c/0/1/
>   3* for i in 1..3761 loop
> l
>   1  declare stmt clob default 'select null from dual where (0,0) in (';
>   2  begin
>   3  for i in 1..3761 loop
>   4  stmt:=stmt||'(0,'||i||'),';
>   5  end loop;
>   6  stmt:=stmt||'(0,-1))';
>   7  execute immediate stmt;
>   8* end;
> /
> declare stmt clob default 'select null from dual where (0,0) in (';
> *
> ERROR at line 1:
> ORA-06502: PL/SQL: numeric or value error
> ORA-06512: at line 4*
> *Gesendet:* Mittwoch, 14. Oktober 2020 um 16:04 Uhr
> *Von:* "Noveljic Nenad" <nenad.noveljic_at_vontobel.com>
> *An:* "jlewisoracle_at_gmail.com" <jlewisoracle_at_gmail.com>, "Oracle L"
> <oracle-l_at_freelists.org>
> *Betreff:* RE: Re: Can Bind variables be an issue with respect to
> network transfer?
>
> “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 <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>
> *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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