pgr_alphashape is returning a geometry collection?

[Dapeng Wang]

I think this is correct, your query statement is 'SELECT
pgr_alphaShape((st_collect(v.the_geom))) as geom FROM ways_vertices_pgr as
v, result as r WHERE r.node = v.id;'.
The return value of the pgr_alphaShape function is a GEOMETRY COLLECTION.

For reference, please seehttps://
docs.pgrouting.org/3.6/en/pgr_alphaShape.html.

Sorry, I went through a long vacation.
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