[postgis-tickets] [PostGIS] #4684: concurrent topology construction routine may result in invalid topology

[PostGIS]

#4684: concurrent topology construction routine may result in invalid topology
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  Reporter:  laopsahl  |      Owner:  strk
      Type:  defect    |     Status:  new
  Priority:  medium    |  Milestone:  PostGIS 3.0.4
 Component:  topology  |    Version:  3.0.x
Resolution:            |   Keywords:
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Comment (by laopsahl):

 I had big problems to get spatial locks that worked with out errors and OK
 performance so that's way I ended up using grid on grid where I added
 lines crossing cell borders in a controlled way by merging grid cells and
 at end I merged the last cells in a single thread. But this solution where
 add cell crossing lines as final step only works when pumping data into a
 empty layer. When doing locks I tried use a meta table where each thread
 updated the spatial to be effected,

 Yes so I agree with you that we need a kind of spatial lock for updating.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/4684#comment:22>
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