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bug #901655 ST_BUFFER asserts with a coplicated shape.

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Coinciding nodes can appear as a result of DOUBLE inaccuracy.
        We should test that before we start the loop.

        Also the spatial relations can be calculated faster if we check
        MBR relations first. And we do have the shape's MBR-s now.

per-file comments:
  sql/gcalc_slicescan.cc
        set_extent() method added.
bug #901655 ST_BUFFER asserts with a coplicated shape.
  sql/gcalc_slicescan.h
        set_extent() method declared.
bug #901655 ST_BUFFER asserts with a coplicated shape.
  sql/gcalc_tools.cc
bug #901655 ST_BUFFER asserts with a coplicated shape.
        checks for equal nodes added.
  sql/item_geofunc.cc
bug #901655 ST_BUFFER asserts with a coplicated shape.
        MBR for the shapes calculated, and MBR checks added before we
        start the heavy calculations.
  sql/spatial.h
bug #901655 ST_BUFFER asserts with a coplicated shape.
        MBR::buffer() method implemented.
This commit is contained in:
Alexey Botchkov
2011-12-08 16:29:45 +04:00
parent ae480437ce
commit fc9d34cabf
5 changed files with 132 additions and 192 deletions
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7
sql/spatial.h
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@@ -98,6 +98,13 @@ struct MBR
if (mbr->ymax > ymax)
ymax= mbr->ymax;
}
void buffer(double d)
{
xmin-= d;
ymin-= d;
xmax+= d;
ymax+= d;
}
int equals(const MBR *mbr)
{