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List:       postgis-users
Subject:    Re: [postgis-users] Postgis 2.0 Topology TopoGeo_AddPolygon very slow
From:       Christophe Vergon <christophevergon-girtec () orange ! fr>
Date:       2014-01-16 7:44:53
Message-ID: 52D78DF5.80700 () orange ! fr
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Hello,

Sorry to not follow this on postgis-devel list, but we want first to 
thank Remi Cura for his advice on "auto-explain" mode.
Yesterday evening we arrived at the same conclusion as Sandro's. We 
maked a test with adding a face who's not touch any other faces and 
_staddfacesplit was the slowest function.
Our first idea is to replace st_contains in the WHERE clause by
edge_id in (SELECT edge_id FROM toposchemaname.edge_id WHERE 
edgedata.geom && newface.mbr)

We maked a second experience with addingg a face who touch other faces, 
the compression point seams to be not the same ... (?)
Too tired to go further we leaved our office, and we found at home the 
Sandro Santilli's message.
Yesterday was a topology day ;)

Christophe

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