[postgis-users] union operation

[Nathan Widmyer]

I have many polygons I'm trying to make a union of.  The polygons have
a high possibility of shared vertices which causes the "NOTICE:
TopologyException: found non-noded intersection between ..." error.

How can I avoid this error?

I did find a reasonable query that used linework which solved that
problem, but was problematic in other ways I think (I forgot those
other circumstances).