Re: Query not producing expected result

Thanks, guys. It should have been obvious to me, but wasn't.

I found the correct result was returned with either

AND event.DateTime <= 'May-1-2019 24:00'

or

AND event.DateTime::date <= 'May-1-2019'

The latter seems best.

Chuck Martin
Avondale Software

On Wed, May 1, 2019 at 12:41 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> Chuck Martin <clmartin(at)theombudsman(dot)com> writes:
> > I need help figuring out why a query is not returning the records I
> expect
> > it to. I'm searching on a DateTime column (timestamp without time zone -
> > not nullable). The query includes:
>
> > AND event.Primaryresp_fkey = 5000011 AND event.DateTime <= 'May-1-2019'
> > AND event.EventDone < 1
>
> > This does not return a record that has a DateTime value "May 1, 2019 9:52
> > AM".
>
> Well, no, since the implied value of the constant is 'May-1-2019 00:00'.
>
> If you only want 1-day precision of the comparison, maybe you should cast
> or truncate the timestamp down to date.
>
> regards, tom lane
>
>
>