Pass thru queries WAS: Maximum OBDC Query Size

Does Run SQL Scripts automatically do pass thru queries?
We ran a query against our biggest table selecting a very small subset of rows and bytes across the line were more indicative that it did run a pass thru query.

create table rob.sample1 as(
SELECT *
FROM QSYS2.NETSTAT_INFO
) with data;

select *
from erplxf.glh
where lhdram = 273.41
;
create table rob.sample2 as(
SELECT *
FROM QSYS2.NETSTAT_INFO
) with data;

select * from rob.sample2
where remote_address = '10.10.9.30'
;

-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Rob Berendt
Sent: Tuesday, April 9, 2019 7:20 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: RE: Maximum OBDC Query Size

Thank you for explaining that.

-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Charles Wilt
Sent: Monday, April 8, 2019 5:11 PM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: Maximum OBDC Query Size

"openquery" is the MS SQl Server function used to make pass-through queries.

In Access, it's done a different way..

In both cases, it's the client application deciding to read entire tables, not ODBC itself.

Charles


On Mon, Apr 8, 2019 at 12:45 PM Stefan Tageson <Stefan.Tageson@xxxxxxxx>
wrote:

Then I am thinking of something else.

Eventually you may remember an email sent on August 10, 2017 by a
gentleman Rob Berendt stating:
This is a common problem. This is why, when using ODBC connections,
using "openquery" to do a bulk of the sorting and selection up on the
server instead of doing the raw selection and ordering on the client
can make a phenomenal difference.

Best regards

stefan.tageson@xxxxxxxx
M +46 732 369934


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