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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/ltree/ltree_gist.c
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@ -1,7 +1,7 @@
/*
* GiST support for ltree
* Teodor Sigaev <teodor@stack.net>
* $PostgreSQL: pgsql/contrib/ltree/ltree_gist.c,v 1.14 2006/03/11 04:38:29 momjian Exp $
* $PostgreSQL: pgsql/contrib/ltree/ltree_gist.c,v 1.15 2006/06/28 11:59:59 teodor Exp $
*/
#include "ltree.h"
@ -81,7 +81,7 @@ ltree_compress(PG_FUNCTION_ARGS)
retval = (GISTENTRY *) palloc(sizeof(GISTENTRY));
gistentryinit(*retval, PointerGetDatum(key),
entry->rel, entry->page,
entry->offset, key->len, FALSE);
entry->offset, FALSE);
}
PG_RETURN_POINTER(retval);
}
@ -98,7 +98,7 @@ ltree_decompress(PG_FUNCTION_ARGS)
gistentryinit(*retval, PointerGetDatum(key),
entry->rel, entry->page,
entry->offset, key->len, FALSE);
entry->offset, FALSE);
PG_RETURN_POINTER(retval);
}
PG_RETURN_POINTER(entry);