I want to extract nodes from polygon in Postgis like it QGIS "extract nodes" tool does. I've red the answered question about this in What's the PostGIS equivalent to Extract Nodes in fTools and used ST_DumpPoints(geom) function. But the result contains both the geometry and a path telling where in the polygon the point belongs. (ST_DumpPoints(the_geom)).geom gives the geometry (points), OK. The problem is that I can't address to single node from geometries, because tool ST_DumpPoints return integer indexes (path) of the polygon the point belongs to. In short, when I visualize my dump points in QGIS, I have no possibility to select one single node - all nodes of polygon have been filtered (picture 2), but selected is only one. As a consequence, I can't implement any spatial analysis with every separate node (e.g. verification about other layer contains any of this nodes).
How I can simply get the points without connection to the polygons?