Comments on: opnqry

By: philpl1jb

philpl1jb — Mon, 29 Dec 2008 19:14:14 +0000

No, this can be very flexible. You can build the string based on the
fields used by the user (Sample below) then use that sting in the
QRYSLT part of the ovrdbf. The trick, as you know, is building it with
the absolute correct format.

DCL &QRYSLT *CHAR 256

…

if (&FLD1 <> ‘ ‘) then do
chgvar &QRYSLT (‘MyField = ”’ *cat &Fld1 *cat ”’)
enddo
if (&FLD2 <> ‘ ‘) then do
if &QRYSLT <> ‘ ‘ then do
CHGVAR &QRYSLT (%TRIM(&QRYSLT) *cat ‘ *AND ‘)
enddo
CHGVAR &QRYSLT (%TRIM(&QRYSLT) *cat ‘ MyField2 = ”’ *cat &Fld2 *cart ”’)
enddo

Phil

By: Anderson123

Anderson123 — Mon, 29 Dec 2008 19:13:02 +0000

hey thanks i get wat u say…just confirm if this is right..i have two values in a screen date1 and date2.the user can either fill in the date values or leave it blank…if dates are given then my qryslt will have date1=12122008 and date2=12122008.case 2 is wen date1 iss blank then qryslt have only date2=12122008 ..if there are two more combinations then 2 more qry are required…this seems ok for few comb but if there are more nos is there an alternate way…if this is the only way i will continue with the same

By: gilly400

gilly400 — Mon, 29 Dec 2008 15:18:32 +0000

Hi,

You can do it in one OPNQRYF statement – If you build your statement up depending on the parameters filled in by your user. This is why the IF statements in the example above are used. Alternatively you could use one OPNQRYF statement with OR’s. Something like this :-

OPNQRYF QRYSLT((A=&A *OR &A = ‘ ‘) *AND (B=&B *OR &B = ‘ ‘) *AND (C=&C *OR &C = ‘ ‘))

Once again this is only to give you an idea of how to achieve this, the syntax may not work for you depending on your variables, etc.

Regards,

Martin Gilbert.

By: Anderson123

Anderson123 — Mon, 29 Dec 2008 13:21:23 +0000

sorry Am not clear….. wat i meant was depending on the combinations of select parameters given in the screen i require opnqry to select recrds from a file.So if user gives n number of combinations will i require n number of opnqry statements?