Re: RUNSQL Command: Help & Escape Messages

[Sam_L <lennon_s_j@xxxxxxxxxxx>]

Vern,

Virtually all the homegrown products use QMQRY under the covers.  (Yes, 
I have one as well.)

If you run QMQRY to an outfile, I think you'll find that it processes 
the result set twice, once to put it to a temp file, then a second time 
to put it to your outfile.  At least it used to work this way and it 
could be significant overhead if you had a large result set. You can see 
it happening if you watch the open files with a large result set.

That's why I mentioned the create table as (select ...) approach.

If you don't use QMQRY, then I think you'd have quite a bit of 
development effort to determine the data types of the result set and 
build an output file from them.  (Of course, you'd think that IBM would 
have all that code somewhere in a re-useable form...)

Whatever, IBM RUNSQL doesn't support outfiles.

Sam

On 11/15/2012 8:04 AM, Vernon Hamberg wrote:
> Hi Sam
>
> Since I've written several of these SQL statement processors on my own
> and now the ones we have in our products, I can't agree that putting in
> OUTPUT parameters is all that difficult.
>
> It's easy to use an API to get the exact parameter definitions from the
> STRQMQRY command, for example. Or just look at a prompt and imitate it -
> close enough.
>
> Then it's simply a matter of passing the value to the STRQMQRY command
> in the command-processing program for your command.
>
> Even using the QM commands directly instead of STRQMQRY, this is pretty
> trivial stuff, seems to me. But I've been playing with this for years,
> so maybe I'm jaded!!
>
> Regards
> Vern