Re: query400 question

[MacWheel99@xxxxxxx]

Interesting observation.
I thought query/400 always read all records before deciding which ones it did
not need, unlike RPG & SQL that only read the ones that you specify.

So for example, I do a calculated field, then select only those records in
which the divide by field is not zero & the query bombs because of divide by
zero, because it is doing the divide before it does the not zero, but if I
make the math divide by (whatever value + 0.00001) it correctly excludes the
whatever value when zero & does not blow up again until we have a case of
that value being 0.00001-

> hey all,
>
>  quick question:  does anyone know when/what makes query/400 decide it must
>  read all records for the query before displaying the first page?
>
>  I use query a lot for quick one-off reports, mostly for my own analysis,
>  and in some complicated querys (joins, sorting on fields from different
>  files, etc) the query reads through all records before displaying the first
>  page.
>
>  sometimes, by omitting just one field from the sort, it won't have to read
>  the whole thing.
>
>  just curious,  TIA.
>
>  rick
>


MacWheel99@aol.com (Alister Wm Macintyre) (Al Mac)
BPCS 405 CD Manager / Programmer @ Global Wire Technologies Incorporated
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