Subject Re: filter on logical plus date field
From Heinz Kesting <Nobody@Nowhere.com>
Date Thu, 6 Jan 2022 01:46:37 +0100
Newsgroups dbase.getting-started

Hi Rouke,

> In a table with a logical field 'returned' and a date field 'dateofrtrn' I'm getting weird results when I set a filter to not returned or isblank(dateofrtrn). I expect to see no records with a tick in the 'returned' field and also to see no records other than a blank value in the dateofrtrn field. However, I get the following (eg. of three records):
 >
> set filt to not returned or isblank(dateofrtrn)
 >
> list returned, dateofrtrn for recno()=2 or recno()=3 or recno()=14
 >
> Record#  returned dateofrtrn
 >         2  .F.        /  /
 >         3  .F.      22/12/2013
 >        14  .T.        /  /
 >
> I expect only records like 2. Why are records 3 and 14 listed?

My 2 cents:

set filt to not returned AND isblank(dateofrtrn)

with the OR condition record#3 would meet the filter.

Hope this helps

Kind regards, Heinz