1interpolate point - Invalid BLOB second geometry 2:memory: #use in-memory database 3SELECT ST_InterpolatePoint(GeomFromText('LINESTRING M(0 0 0, 10 0 20)'), zeroblob(10)); 41 # rows (not including the header row) 51 # columns 6ST_InterpolatePoint(GeomFromText('LINESTRING M(0 0 0, 10 0 20)'), zeroblob(10)) 7(NULL) 8