Re: Rounding Float Array

Alex Magnum <magnum11200@gmail.com> wrote:

> Hello,
>
> I have a float array holding geo location information.
>
>               geoloc
> -----------------------------------
>  {5.3443133704554,100.29457569122}
>  {5.3885574294704,100.29601335526}
>  {3.1654978750403,101.60915851593}
>  {5.3766154817748,100.31472444534}
>  {3.1545014704258,101.70036971569}
> (5 rows)
>
> Is there an easy way to round all values to 4 decimals.

sure:

test=*# select * from alex ;
              geoloc
-----------------------------------
 {5.3443133704554,100.29457569122}
 {5.3885574294704,100.29601335526}
 {3.1654978750403,101.60915851593}
 {5.3766154817748,100.31472444534}
(4 rows)

Time: 0,245 ms
test=*# update alex set geoloc = array[round(geoloc[1]::numeric,4),
round(geoloc[2]::numeric,4)];
UPDATE 4
Time: 0,454 ms
test=*# select * from alex ;
      geoloc
-------------------
 {5.3443,100.2946}
 {5.3886,100.296}
 {3.1655,101.6092}
 {5.3766,100.3147}
(4 rows)




Andreas
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