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* Add support NULL to GiST.

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* some refactoring and simplify code int gistutil.c and gist.c
* now in some cases it can be called used-defined
  picksplit method for non-first column in index, but here
	is a place to do more.
* small fix of docs related to support NULL.
This commit is contained in:
Teodor Sigaev
2006-05-24 11:01:39 +00:00
parent 86722057fd
commit d2158b0281
8 changed files with 375 additions and 430 deletions
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19
src/backend/access/gist/gistget.c
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@@ -8,7 +8,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/gist/gistget.c,v 1.56 2006/03/05 15:58:20 momjian Exp $
* $PostgreSQL: pgsql/src/backend/access/gist/gistget.c,v 1.57 2006/05/24 11:01:39 teodor Exp $
*
*-------------------------------------------------------------------------
*/
@@ -361,7 +361,7 @@ gistindex_keytest(IndexTuple tuple,
IncrIndexProcessed();
/*
* Tuple doesn't restore after crash recovery because of inclomplete
* Tuple doesn't restore after crash recovery because of incomplete
* insert
*/
if (!GistPageIsLeaf(p) && GistTupleIsInvalid(tuple))
@@ -378,14 +378,15 @@ gistindex_keytest(IndexTuple tuple,
key->sk_attno,
giststate->tupdesc,
&isNull);
/* is the index entry NULL? */
if (isNull)
{
/* XXX eventually should check if SK_ISNULL */
if ( key->sk_flags & SK_ISNULL ) {
/* is the compared-to datum NULL? on non-leaf page it's possible
to have nulls in childs :( */
if ( isNull || !GistPageIsLeaf(p) )
return true;
return false;
}
/* is the compared-to datum NULL? */
if (key->sk_flags & SK_ISNULL)
} else if ( isNull )
return false;
gistdentryinit(giststate, key->sk_attno - 1, &de,