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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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4
contrib/btree_gist/btree_utils_var.c
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@ -19,7 +19,7 @@ gbt_var_decompress(PG_FUNCTION_ARGS)
gistentryinit(*retval, PointerGetDatum(key),
entry->rel, entry->page,
entry->offset, VARSIZE(key), FALSE);
entry->offset, FALSE);
PG_RETURN_POINTER(retval);
}
@ -292,7 +292,7 @@ gbt_var_compress(GISTENTRY *entry, const gbtree_vinfo * tinfo)
retval = palloc(sizeof(GISTENTRY));
gistentryinit(*retval, PointerGetDatum(r),
entry->rel, entry->page,
entry->offset, VARSIZE(r), TRUE);
entry->offset, TRUE);
}
else
retval = entry;