Re: PL/pgsql function handle CUBE values

On Jan 16, 2008, at 3:41 PM, Colin Wetherbee wrote:

> Rajarshi Guha wrote:
>> Hi, I am trying to write a PL/pgsql function that will take a CUBE
>> variable (which will be a 1D point) and a double precision variable.
>> If the input CUBE is defined as
>> '(x,y,z)'::cube
>> the function would then return a CUBE value of the form
>> '(x+R,y+R,z+R),(x-R,y-R,z-R)'::cube
>> where R is the second argument.
>> The problem I'm having is to actually add R to the individual
>> components of the CUBE variable. I can't cast CUBE to float[] and
>> I don't see anyway to get at the individual components of the CUBE.
>
> I haven't tested this, but it looks like you can use cube_subset()
> to do that.
>
> From [0]:
>
> cube_subset(cube, int[]) returns cube
>
> Further, it looks like you're actually trying to create a function
> that will do precisely what cube_enlarge() does.

Indeed! sorry for not giving the docs a thorough a reading

Thanks for the pointer

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Rajarshi Guha <rguha(at)indiana(dot)edu>
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...but there was no one in it.......
- RG