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* new split algorithm (as proposed in http://archives.postgresql.org/pgsql-hackers/2006-06/msg00254.php)
  * possible call pickSplit() for second and below columns
  * add spl_(l|r)datum_exists to GIST_SPLITVEC -
    pickSplit should check its values to use already defined
    spl_(l|r)datum for splitting. pickSplit should set
    spl_(l|r)datum_exists to 'false' (if they was 'true') to
    signal to caller about using spl_(l|r)datum.
  * support for old pickSplit(): not very optimal
    but correct split
* remove 'bytes' field from GISTENTRY: in any case size of
  value is defined by it's type.
* split GIST_SPLITVEC to two structures: one for using in picksplit
  and second - for internal use.
* some code refactoring
* support of subsplit to rtree opclasses

TODO: add support of subsplit to contrib modules
This commit is contained in:
Teodor Sigaev
2006-06-28 12:00:14 +00:00
parent a1dc5c60bc
commit 1f7ef548ec
23 changed files with 266 additions and 645 deletions
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6
contrib/cube/cube.c
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@ -1,5 +1,5 @@
/******************************************************************************
$PostgreSQL: pgsql/contrib/cube/cube.c,v 1.25 2006/05/30 22:12:12 tgl Exp $
$PostgreSQL: pgsql/contrib/cube/cube.c,v 1.26 2006/06/28 11:59:59 teodor Exp $
This file contains routines that can be bound to a Postgres backend and
called by the backend in the process of processing queries. The calling
@ -300,8 +300,8 @@ g_cube_picksplit(GistEntryVector *entryvec,
double size_l,
size_r;
int nbytes;
OffsetNumber seed_1 = 0,
seed_2 = 0;
OffsetNumber seed_1 = 1,
seed_2 = 2;
OffsetNumber *left,
*right;
OffsetNumber maxoff;