[pgrouting-users] assign_vertex_id usage in Workshop

[Luís de Sousa]

Hello again,

In section 5 of the Workshop the assign_vertex_id function is used on a
MULTILINESTRING column:

http://workshop.pgrouting.org/chapters/topology.html#calculate-topology

This function makes use of the st_startpoint function that can only take as
input a LINESTRING. I worked around this by creating an extra column in the
ways table, but I wonder what can be the usage may be of a network composed
by MULTILINESTRING objects. Perhaps it would be better to simply change the
data type used in this example.

Regards,

Luís
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