id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
1116	Topology: ST_ModEdgeHeal return undocumented	aperi2007	strk	"Hi.
try-ing to use the ST_ModEdgeHeal I notice the function return wrong idedge.

More precisely it seem to do the correct work assigning also the correct value (idedge), but not always retrun that value.

So I to some tests.
This is the result:

calling EdgeA (with value id1) the first edge and EdgeB (with value id2) the second edge, the function should merge the two edges and assign it the value of the first edge passed (""id1"").

There are 4 possible case:
(the character > < show the direction of the edge)

Case 1)

*-(EdgeA)->--* *-(EdgeB)->--* 

The Function correctly produce a edge (EdgeC) like this:

*-(EdgeC)-->-----* having id=id1.

But the query
select STModEdgeHeal(..);
will return the value ""id2"" instead of ""id1"".

Case 2)

*-(EdgeA)-<--* *-(EdgeB)->--* 

The Function correctly produce a edge (EdgeC) like this:

*-(EdgeC)-->-----* having id=id1.
 
In this case the function ST_ModEdgeHeal will return the right value (id1)

Case 3)

*-(EdgeA)->--* *-(EdgeB)-<--* 

The Function correctly produce a edge (EdgeC) like this:

*-(EdgeC)-->-----* having id=id1.

But the query will return a value different from ""id1""

Case 4)

*-(EdgeA)-<--* *-(EdgeB)-<--* 

The Function correctly produce a edge (EdgeC) like this:

*-(EdgeC)--<-----* having id=id1.

In this case the function ST_ModEdgeHeal will return the right value (id1)

Regards,
"	defect	closed	medium	PostGIS 2.0.0	documentation	trunk	fixed