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WL#1562 (Improving spatial code)

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A set of changes improving our RTree indexes and fixed few bugs
found during the tests


myisam/rt_index.c:
  Algorythm for picking the branch to insert was fixed.
  pick_by_perimeter version of the algorythm added (mostly for testing
  purposes)
myisam/rt_index.h:
  minimal size of the page set to 1/3
  It noticeable increases searching performance
myisam/rt_key.c:
  counting of the size of the filled part of the page fixed
  rtree_choose_key moved to rt_index.c
myisam/rt_key.h:
  no need to make rtree_choose_key global
myisam/rt_mbr.c:
  operations for counting the perimeter of MBR added
myisam/rt_mbr.h:
  interface for rtree_perimeter_increase
myisam/rt_split.c:
  my_multi_malloc changed with my_alloca
sql/spatial.cc:
  LINESTRING object can consist of single point
This commit is contained in:
unknown
2004-05-25 15:06:32 +05:00
parent de861db3e7
commit c690204c70
8 changed files with 207 additions and 57 deletions
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myisam/rt_key.h
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@ -26,6 +26,4 @@ int rtree_delete_key(MI_INFO *info, uchar *page, uchar *key,
uint key_length, uint nod_flag);
int rtree_set_key_mbr(MI_INFO *info, MI_KEYDEF *keyinfo, uchar *key,
uint key_length, my_off_t child_page);
uchar *rtree_choose_key(MI_INFO *info, MI_KEYDEF *keyinfo, uchar *key,
uint key_length, uchar *page_buf, uint nod_flag);
#endif /* _rt_key_h */