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Binary Refcursor possible?
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* Binary Refcursor possible?
@ 2005-11-23 03:39  Ralph Mason <ralph.mason@telogis.com>
  0 siblings, 1 reply; 3+ messages in thread

From: Ralph Mason @ 2005-11-23 03:39 UTC (permalink / raw)
  To: pgsql-performance

Hi,

I am trying to get better performance reading data from postgres, so I 
would like to return the data as binary rather than text as parsing it 
is taking a considerable amount of processor.

However I can't figure out how to do that! I have functions like.

function my_func(ret refcursor) returns refcursor AS

$$

BEGIN
OPEN $1 for select * from table;
return $1
END;

$$ language 'plpgsql'

There are queried using

SELECT my_func( 'ret'::refcursor); FETCH ALL FROM ret;

Is there any way I can say make ret a binary cursor?

Thanks
Ralph





^ permalink  raw  reply  [nested|flat] 3+ messages in thread

* Re: Binary Refcursor possible?
@ 2005-11-23 04:07  Tom Lane <tgl@sss.pgh.pa.us>
  parent: Ralph Mason <ralph.mason@telogis.com>
  0 siblings, 1 reply; 3+ messages in thread

From: Tom Lane @ 2005-11-23 04:07 UTC (permalink / raw)
  To: Ralph Mason <ralph.mason@telogis.com>; +Cc: pgsql-performance

Ralph Mason <ralph.mason@telogis.com> writes:
> Is there any way I can say make ret a binary cursor?

It's possible to determine that at the protocol level, if you're using
V3 protocol; but whether this is exposed to an application depends on
what client-side software you are using.  Which you didn't say.

			regards, tom lane



^ permalink  raw  reply  [nested|flat] 3+ messages in thread

* Re: Binary Refcursor possible?
@ 2005-11-23 04:14  Ralph Mason <ralph.mason@telogis.com>
  parent: Tom Lane <tgl@sss.pgh.pa.us>
  0 siblings, 0 replies; 3+ messages in thread

From: Ralph Mason @ 2005-11-23 04:14 UTC (permalink / raw)
  To: Tom Lane <tgl@sss.pgh.pa.us>; +Cc: pgsql-performance

Tom Lane wrote:
> Ralph Mason <ralph.mason@telogis.com> writes:
>   
>> Is there any way I can say make ret a binary cursor?
>>     
>
> It's possible to determine that at the protocol level, if you're using
> V3 protocol; but whether this is exposed to an application depends on
> what client-side software you are using.  Which you didn't say.
>
> 			regards, tom lane
>   
This is probably in the documentation but I couldn't find it.

All I could see is that if you open a cursor for  binary it would return 
with a type of binary rather than text in the row data messages.  The 
RowDescription format code is always text, and the cursor thing is the 
only way I could see to change that.

Is there some setting I can set that will make it return all data as 
binary?  The dream would also be that I could ask the server it's native 
byte order and have it send me binary data in it's native byte order.  
Nice and fast. :-0

Ralph







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-- links below jump to the message on this page --
2005-11-23 03:39 Binary Refcursor possible? Ralph Mason <ralph.mason@telogis.com>
2005-11-23 04:07 ` Tom Lane <tgl@sss.pgh.pa.us>
2005-11-23 04:14   ` Ralph Mason <ralph.mason@telogis.com>

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