[postgis-users] Is st_isvalidreason singular for any polygon, or can multiple errors be returned?

[Ben Madin]

Thanks strk,

Either way is fine, but maybe for now we could put a line into the documentation to that effect:

"Note: By design only the first invalidity in a polygon is reported. After correcting errors identified by st_isvalidreason it should be run again to check that there are no further errors."

cheers

Ben

On 19/12/2011, at 9:52 PM, Sandro Santilli wrote:

> On Mon, Dec 19, 2011 at 09:20:09PM +0800, Ben Madin wrote:
> 
>> So my question is - when running st_isvalidreason does it just return
>> the first invalid problem it finds, or do I need a more sophisticated
>> query to return all the problem points? 
> 
> Only the first one. By design. It's being discussed on JTS list if this
> will change in the future. For now it is assumed that first invalidity
> would render later ones hard to detect.
> 
> --strk; 
> 
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