Re: Problem with retrieving records using double precision fields

Richard Huxton wrote:
> Raymond C. Rodgers wrote:
>
>> In two separate databases that are configured to have latitude and
>> longitude as double precision fields, I'm having trouble retrieving
>> records using "between" on the longitude field. I know that I have data
>> within range, but any query involving the longitude field fails to find
>> records.
>>
>
>
>> test=# select * from coordtest where longitude between -83.0 and -84.0;
>>
>
> Order of between arguments is important.
>
> richardh=> SELECT 2 between 1 and 3;
> ?column?
> ----------
> t
> (1 row)
>
> richardh=> SELECT 2 between 3 and 1;
> ?column?
> ----------
> f
> (1 row)
>
> richardh=> SELECT -2 between -1 and -3;
> ?column?
> ----------
> f
> (1 row)
>
>
Ok, so I made a simple math error (-83 being larger than -84) and didn't
catch it.

Thanks,
Raymond