mirror/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2026-05-16 11:57:38 +02:00
Code Issues Projects Releases Packages Wiki Activity

Bug #30286 spatial index cause corruption and server crash!

Browse source 
As the result of DOUBLE claculations can be bigger
than DBL_MAX constant we use in code, we shouldn't use this constatn
as a biggest possible value.
Particularly the rtree_pick_key function set 'min_area= DBL_MAX' relying
that any rtree_area_increase result will be less so we return valid
key. Though in rtree_area_increase function we calculate the area
of the rectangle, so the result can be 'inf' if the rectangle is
huge enough, which is bigger than DBL_MAX.

Code of the rtree_pick_key modified so we always return a valid key.


myisam/rt_index.c:
  Bug #30286 spatial index cause corruption and server crash!
  
  always set the best_key with the first key we get, so we always return
  somthing valid.
myisam/rt_mbr.c:
  Bug #30286 spatial index cause corruption and server crash!
  
  function comment extended
mysql-test/r/gis-rtree.result:
  Bug #30286 spatial index cause corruption and server crash!
  test result
mysql-test/t/gis-rtree.test:
  Bug #30286 spatial index cause corruption and server crash!
  test case
This commit is contained in:
unknown 2007-10-05 15:40:32 +05:00
commit 6d54b5771b
4 changed files with 76 additions and 14 deletions
Download patch file Download diff file Expand all files Collapse all files

5
myisam/rt_mbr.c
View file

@ -525,7 +525,10 @@ double rtree_overlapping_area(HA_KEYSEG *keyseg, uchar* a, uchar* b,
}
/*
Calculates MBR_AREA(a+b) - MBR_AREA(a)
Calculates MBR_AREA(a+b) - MBR_AREA(a)
Note: when 'a' and 'b' objects are far from each other,
the area increase can be really big, so this function
can return 'inf' as a result.
*/
double rtree_area_increase(HA_KEYSEG *keyseg, uchar* a, uchar* b,
uint key_length, double *ab_area)