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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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2
myisam/rt_index.h
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@ -23,7 +23,7 @@
(nod_flag ? nod_flag : info->s->base.rec_reflength))
#define rt_PAGE_END(page) (page + mi_getint(page))
#define rt_PAGE_MIN_SIZE(block_length) ((uint)(block_length) / 2)
#define rt_PAGE_MIN_SIZE(block_length) ((uint)(block_length) / 3)
int rtree_insert(MI_INFO *info, uint keynr, uchar *key, uint key_length);
int rtree_delete(MI_INFO *info, uint keynr, uchar *key, uint key_length);