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Calculate max() failed
Message
De
19/08/1999 14:44:33
Cetin Basoz
Engineerica Inc.
Izmir, Turquie
 
 
À
19/08/1999 13:08:44
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Divers
Thread ID:
00255384
Message ID:
00255451
Vues:
16
>I used this:
>select mytable
>set order to mycode
>seek (mycode)
>myvar = ""
>Calculate max(myfield) to myvar rest while code = mycode for myFilterCondition
>
>It works fine ONLY if there are matching records to myFilterCondition.
>
>If no records within the scope match myFilterCondition, myvar returns a value from myfield on the next record out of the scope (this is, where code # mycode).
>
>I expected myvar to be blank when no matching records, even if it wasn´t blank before the calculation and much more if it was blanked as shown upthere.
>
>Is this a bug of vfp?. Does this work as I expected in other versions of Vfp? (I´m running VFP 6.0 version number 06.00.8167.00)

Cristobal,
I prefer :
select max(myField) from myTable ;
   where code = mycode and myFilterCondition ;
   into array aMyArray
myvar = iif(type("aMyArray[1]")="U","",aMyArray[1])
and this also have the advantage of not moving rec.pointer, no need to check table is open etc.
BTW It works as intended in VFP5.
Cetin
Çetin Basöz

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