[postgis-devel] ST_Equals, immutable strict

[strk]

On Tue, Aug 31, 2010 at 12:30:39PM +0200, Nicklas Avén wrote:
> Hallo ST_Equals is marked as "immutable strict", other functions like ST_Intersects, ST_Within and so on is only marked "immutable" I guess that is why I have problems getting the index used for ST_Equals. Is there a reason for immutable strict on st_equals or is it a mistake? It is the same in trunk and 1.5.1  /Nicklas

STRICT means that if any argument is NULL, then the result
should also be NULL. Most likely ST_Intersects, ST_Within
and others should be marked as strict too.

--strk; 

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