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Then unless you are on 6.1, you are SOL.

You're going to have to do it the hard way...

select * from mytable
where (myYYYY > :startYear
or ( myYYYY = :startYear
and myMM > :startMonth )
or ( myYYYY = :startYear
and myMM = :startMonth
and myDay >= :startDay )
and (myYYYY < :endYear
or ( myYYYY = :endYear
and myMM < :endMonth )
or ( myYYYY = :endYear
and myMM = :endMonth
and myDay <= :endDay )

What fun!

You could try creating a new keyed logical that combines the fields
and is keyed on the combined field. I don't know if the CQE or SQE
will make use of it. Perhaps the CQE if you specify the logical in
the query.... maybe Elvis or Birgitta would know.


Another option that's more work up front but better in the long run.
Create a new file with an actual date field. Change the current
physical to a logical over the new file. Add a *BEFORE UPDATE/INSERT
trigger to the file to keep the date field in sync with the component
fields. All of which should be doable without having to recompile any
applications. You could even try without the triggers, simply have
the logical define the component fields using SST. But IIRC that
logical would be read only.

Good luck!

Charles


On Mon, Oct 20, 2008 at 2:19 PM, Bradley V. Stone <bvstone@xxxxxxxxxxxx> wrote:
Yes, an index would be needed.

Bradley V. Stone
BVSTools - www.bvstools.com
eRPG SDK - www.erpgsdk.com

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx]On Behalf Of Charles Wilt
Sent: Monday, October 20, 2008 11:35 AM
To: Midrange Systems Technical Discussion
Subject: Re: Best method using SQL to combine date fields (day, month,
year)


Create a UDF (download Alan's(?) iDate UDF)...
Create a view that uses the UDF...

Now the problem, if you're intending to use this date as a selection
criteria, an index will not be used even if one exists over the three
columns. (Unless you're at v6r1, then you can build an index with the
calculated value)

Do you need the index for performance?

Charles

On Mon, Oct 20, 2008 at 12:17 PM, Bradley V. Stone
<bvstone@xxxxxxxxxxxx> wrote:
Ok, building some dynamic SQL statements.

Got to a file that has date separated into year, month and day
fields. Ugh.

So, wondering the best/easiest way to combine these so I can
use them in an
SQL statement? Hopefully some magical SQL command that I can
use inline?

Thanks!

Bradley V. Stone
BVSTools - www.bvstools.com
eRPG SDK - www.erpgsdk.com

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