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ST_DelaunayTriangulation XYM - (only_edges=yes)
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:memory: #use in-memory database
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SELECT ST_Equals(ST_DelaunayTriangulation(GeomFromText('MULTIPOINTM(0 0 10, 1 1 11, 2 2 12, 0 1 13, 2 1 14)'), 1), GeomFromText('MULTILINESTRINGM((0 1 0, 2 2 0), (0 0 0, 0 1 0), (0 0 0, 2 1 0), (2 1 0, 2 2 0), (1 1 0, 2 1 0), (1 1 0, 2 2 0), (0 1 0, 1 1 0), (0 0 0, 1 1 0)) '));
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1 # rows (not including the header row)
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ST_Equals(ST_DelaunayTriangulation(GeomFromText('MULTIPOINTM(0 0 10, 1 1 11, 2 2 12, 0 1 13, 2 1 14)'), 1), GeomFromText('MULTILINESTRINGM((0 1 0, 2 2 0), (0 0 0, 0 1 0), (0 0 0, 2 1 0), (2 1 0, 2 2 0), (1 1 0, 2 1 0), (1 1 0, 2 2 0), (0 1 0, 1 1 0), (0 0 0, 1 1 0)) '))