| Bug #79031 | Make ST_SymDifference(gc, gc) more numerically robust | ||
|---|---|---|---|
| Submitted: | 30 Oct 2015 7:50 | Modified: | 3 Nov 2015 16:01 |
| Reporter: | Norvald Ryeng | Email Updates: | |
| Status: | Closed | Impact on me: | |
| Category: | MySQL Server: GIS | Severity: | S3 (Non-critical) |
| Version: | 5.7.9 | OS: | Any |
| Assigned to: | CPU Architecture: | Any | |
[3 Nov 2015 16:01]
Paul DuBois
Noted in 5.7.10, 5.8.0 changelogs. ST_SymDifference() could raise an assertion for polygons with self-intersection points.
Description: Rewrite symmetric difference of geometry collections from difference(union(A, B), intersection(A, B)) to union(difference(A, B), difference(B, A)) in order to make the algorithm more numerically robust. How to repeat: Code inspection.