| Bug #1771 | GIS: issimple() return incorrect value | ||
|---|---|---|---|
| Submitted: | 6 Nov 2003 10:57 | Modified: | 7 Aug 2012 13:01 |
| Reporter: | Oleksandr Byelkin | Email Updates: | |
| Status: | Closed | Impact on me: | |
| Category: | MySQL Server: GIS | Severity: | S4 (Feature request) |
| Version: | 4.1 | OS: | Any (any) |
| Assigned to: | Assigned Account | CPU Architecture: | Any |
[8 Nov 2003 7:17]
Alexey Botchkov
This function isn't really implemented yet It will be implemented along with the exact spatial functions
[7 Aug 2012 13:01]
Alexander Barkov
This bug was earlier fixed in mysql-5.6.0.
Description: issimple() return incorrect value or description in manual is wrong: @findex IsSimple() @c description_for_help_topic IsSimple @item IsSimple(g) Returns 1 if the geometry value @code{g} has no anomalous geometric points, such as self intersection or self tangency. @code{IsSimple()} returns 0 if the argument is not simple, and @minus{}1 if it is @code{NULL}. (may be I incorectly understand simplicity, but I think point should be simple) How to repeat: ! select issimple(MultiPoint(Point(3, 6), Point(4, 10))), issimple(Point(3, 6)), ! issimple(PolygonFromText('POLYGON((10 10,20 10,20 20,10 20,10 10))')),issimple(GeometryFromText('POINT(1 4)')), issimple(AsWKB(GeometryFromText('POINT(1 4)'))); ! issimple(MultiPoint(Point(3, 6), Point(4, 10))) issimple(Point(3, 6)) issimple(PolygonFromText('POLYGON((10 10,20 10,20 20,10 20,10 10))')) issimple(GeometryFromText('POINT(1 4)')) issimple(AsWKB(GeometryFromText('POINT(1 4)'))) ! 0 0 0 0 0