Re: Query not producing expected result

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От Chuck Martin
Тема Re: Query not producing expected result
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Msg-id CAFw6=U3wV3NDt3c8sqHiE4QLRufy3s8d21BaLdkRLpPNUEh9ww@mail.gmail.com
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Ответ на Re: Query not producing expected result  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: Query not producing expected result  (Francisco Olarte <folarte@peoplecall.com>)
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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@sss.pgh.pa.us> wrote:
Chuck Martin <clmartin@theombudsman.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


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