[postgis-users] postgis topology question

[Absurd]

Hi. I’m trying to use postgis topology. And I have a question. 
I have 3 nodes N1, N2, N3 and 2 edges E1 (with start_node = N1; end_node =
N2) and E2 (with start_node = N2; end_node = N3). I want to move node N2. 
Do I have to select all edges, connected to node N2 (E1 and E2) and change
their geometry too or there is such functionality in postgis topology?

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