Bug #117048 ST_Buffer gives unexpected reuslt using end_flat strategy with closed Linestring
| Submitted: | 26 Dec 2024 9:06 | Modified: | 30 Dec 2024 13:44 |
|---|---|---|---|
| Reporter: | shijie li | Email Updates: | |
| Status: | Verified | Impact on me: | |
| Category: | MySQL Server: GIS | Severity: | S2 (Serious) |
| Version: | 8.0.40 | OS: | Any |
| Assigned to: | CPU Architecture: | Any |
[26 Dec 2024 11:43]
MySQL Verification Team
Hello shijie li, Thank you for the report and feedback. regards, Umesh
[30 Dec 2024 13:44]
shijie li
If possible, please let me know the reason for the bug and whether you will fix this bug. Thank you.
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Description: A closed Linestring is actually a LinearRing, when we ask for a buffer using end_flat strategy with on a LineaRing, ST_Buffer() still flattens the declared ending point, which is also the starting point. How to repeat: SELECT ST_AsText(ST_Buffer(ST_GeomFromText('LINESTRING (-20 0, 0 20, 20 0, 0 -20, -20 0)'), 50, ST_Buffer_Strategy("end_flat")));