Hi, I found that polygons created with "Avoid intersections" on a Postgis layer will sometimes over lap their neighbors. As I don't want overlapping polygons on my Postgis layer, I implemented a trigger function using ST_Overlaps to automatically detect and reject them. Because the mismatch behavior between Qgis and Postgis as stated above, a simple check like that won't work. To achieve the same result, I would have to re-shape newly created polygons with ST_Union and ST_Difference in my trigger function, which is a lot of work to do - since I am a newbie and finding my way through GIS and database world.
My question is: Is there an easier way to make Qgis "Avoid intersections" plays well with Postgis "st_overlaps" so I can avoid the other dreaded way? Thanks! My same question on gis.stackexchange<http://gis.stackexchange.com/q/64177/5901>
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