This commit was manufactured by cvs2git to create branch 'ecpg_big_bison'.

Sprout from master 2002-06-20 20:29:54 UTC Bruce Momjian <bruce@momjian.us> 'Update copyright to 2002.'
Delete:
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    src/test/regress/sql/euc_jp.sql
    src/test/regress/sql/euc_kr.sql
    src/test/regress/sql/euc_tw.sql
    src/test/regress/sql/float4.sql
    src/test/regress/sql/float8.sql
    src/test/regress/sql/foreign_key.sql
    src/test/regress/sql/geometry.sql
    src/test/regress/sql/hash_index.sql
    src/test/regress/sql/horology.sql
    src/test/regress/sql/inet.sql
    src/test/regress/sql/inherit.sql
    src/test/regress/sql/insert.sql
    src/test/regress/sql/int2.sql
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    src/test/regress/sql/int8.sql
    src/test/regress/sql/interval.sql
    src/test/regress/sql/join.sql
    src/test/regress/sql/limit.sql
    src/test/regress/sql/lseg.sql
    src/test/regress/sql/mule_internal.sql
    src/test/regress/sql/name.sql
    src/test/regress/sql/numeric.sql
    src/test/regress/sql/numeric_big.sql
    src/test/regress/sql/numerology.sql
    src/test/regress/sql/oid.sql
    src/test/regress/sql/oidjoins.sql
    src/test/regress/sql/opr_sanity.sql
    src/test/regress/sql/path.sql
    src/test/regress/sql/plpgsql.sql
    src/test/regress/sql/point.sql
    src/test/regress/sql/polygon.sql
    src/test/regress/sql/portals.sql
    src/test/regress/sql/portals_p2.sql
    src/test/regress/sql/privileges.sql
    src/test/regress/sql/random.sql
    src/test/regress/sql/reltime.sql
    src/test/regress/sql/rules.sql
    src/test/regress/sql/sanity_check.sql
    src/test/regress/sql/select.sql
    src/test/regress/sql/select_distinct.sql
    src/test/regress/sql/select_distinct_on.sql
    src/test/regress/sql/select_having.sql
    src/test/regress/sql/select_implicit.sql
    src/test/regress/sql/select_into.sql
    src/test/regress/sql/select_views.sql
    src/test/regress/sql/sql_ascii.sql
    src/test/regress/sql/strings.sql
    src/test/regress/sql/subselect.sql
    src/test/regress/sql/temp.sql
    src/test/regress/sql/text.sql
    src/test/regress/sql/time.sql
    src/test/regress/sql/timestamp.sql
    src/test/regress/sql/timestamptz.sql
    src/test/regress/sql/timetz.sql
    src/test/regress/sql/tinterval.sql
    src/test/regress/sql/transactions.sql
    src/test/regress/sql/triggers.sql
    src/test/regress/sql/type_sanity.sql
    src/test/regress/sql/union.sql
    src/test/regress/sql/varchar.sql
    src/tools/RELEASE_CHANGES
    src/tools/backend/README
    src/tools/backend/backend_dirs.html
    src/tools/backend/flow.fig
    src/tools/backend/flow.gif
    src/tools/backend/index.html
    src/tools/ccsym
    src/tools/copyright
    src/tools/entab/Makefile
    src/tools/entab/entab.c
    src/tools/entab/entab.man
    src/tools/entab/halt.c
    src/tools/find_badmacros
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    src/tools/find_typedef
    src/tools/make_ctags
    src/tools/make_diff/README
    src/tools/make_diff/cporig
    src/tools/make_diff/difforig
    src/tools/make_diff/rmorig
    src/tools/make_etags
    src/tools/make_keywords
    src/tools/make_mkid
    src/tools/pgcvslog
    src/tools/pginclude/README
    src/tools/pginclude/pgcompinclude
    src/tools/pginclude/pgdefine
    src/tools/pginclude/pgfixinclude
    src/tools/pginclude/pgrminclude
    src/tools/pgindent/README
    src/tools/pgindent/indent.bsd.patch
    src/tools/pgindent/pgcppindent
    src/tools/pgindent/pgindent
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    src/tutorial/Makefile
    src/tutorial/README
    src/tutorial/advanced.source
    src/tutorial/basics.source
    src/tutorial/beard.c
    src/tutorial/complex.c
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    src/tutorial/funcs.c
    src/tutorial/funcs.source
    src/tutorial/funcs_new.c
    src/tutorial/syscat.source
    src/utils/Makefile
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    src/utils/getopt.c
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diff --git a/src/backend/access/gist/Makefile b/src/backend/access/gist/Makefile
deleted file mode 100644
index 7f982d0dfd8..00000000000
--- a/src/backend/access/gist/Makefile
+++ /dev/null
@@ -1,30 +0,0 @@
-#-------------------------------------------------------------------------
-#
-# Makefile--
-#    Makefile for access/gist
-#
-# IDENTIFICATION
-#    $Header: /cvsroot/pgsql/src/backend/access/gist/Makefile,v 1.10 2000/08/31 16:09:31 petere Exp $
-#
-#-------------------------------------------------------------------------
-
-subdir = src/backend/access/gist
-top_builddir = ../../../..
-include $(top_builddir)/src/Makefile.global
-
-OBJS = gist.o gistget.o gistscan.o giststrat.o
-
-all: SUBSYS.o
-
-SUBSYS.o: $(OBJS)
-	$(LD) $(LDREL) $(LDOUT) SUBSYS.o $(OBJS)
-
-depend dep:
-	$(CC) -MM $(CFLAGS) *.c >depend
-
-clean: 
-	rm -f SUBSYS.o $(OBJS)
-
-ifeq (depend,$(wildcard depend))
-include depend
-endif
diff --git a/src/backend/access/gist/gist.c b/src/backend/access/gist/gist.c
deleted file mode 100644
index 2849ca31ecb..00000000000
--- a/src/backend/access/gist/gist.c
+++ /dev/null
@@ -1,1966 +0,0 @@
-/*-------------------------------------------------------------------------
- *
- * gist.c
- *	  interface routines for the postgres GiST index access method.
- *
- *
- * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/access/gist/gist.c,v 1.95 2002/06/20 20:29:24 momjian Exp $
- *
- *-------------------------------------------------------------------------
- */
-#include "postgres.h"
-
-#include "access/genam.h"
-#include "access/gist.h"
-#include "access/gistscan.h"
-#include "access/heapam.h"
-#include "catalog/index.h"
-#include "miscadmin.h"
-
-
-#undef GIST_PAGEADDITEM
-
-#define ATTSIZE( datum, TupDesc, i, isnull ) \
-	( \
-		( isnull ) ? 0 : \
-			att_addlength(0, (TupDesc)->attrs[(i)-1]->attlen, (datum)) \
-	)
-
-/* result's status */
-#define INSERTED	0x01
-#define SPLITED		0x02
-
-/* group flags ( in gistSplit ) */
-#define LEFT_ADDED	0x01
-#define RIGHT_ADDED 0x02
-#define BOTH_ADDED	( LEFT_ADDED | RIGHT_ADDED )
-
-/*
- * This defines only for shorter code, used in gistgetadjusted
- * and gistadjsubkey only
- */
-#define FILLITEM(evp, isnullkey, okey, okeyb, rkey, rkeyb)	 do { \
-		if ( isnullkey ) {										  \
-				gistentryinit((evp), rkey, r, (Page) NULL ,		  \
-						(OffsetNumber) 0, rkeyb, FALSE);		  \
-		} else {												  \
-				gistentryinit((evp), okey, r, (Page) NULL,		  \
-						(OffsetNumber) 0, okeyb, FALSE);		  \
-		}														  \
-} while(0)
-
-#define FILLEV(isnull1, key1, key1b, isnull2, key2, key2b) do { \
-	FILLITEM(*ev0p, isnull1, key1, key1b, key2, key2b);		\
-	FILLITEM(*ev1p, isnull2, key2, key2b, key1, key1b);		\
-} while(0);
-
-/* Working state for gistbuild and its callback */
-typedef struct
-{
-	GISTSTATE	giststate;
-	int			numindexattrs;
-	double		indtuples;
-} GISTBuildState;
-
-
-/* non-export function prototypes */
-static void gistbuildCallback(Relation index,
-				  HeapTuple htup,
-				  Datum *attdata,
-				  char *nulls,
-				  bool tupleIsAlive,
-				  void *state);
-static void gistdoinsert(Relation r,
-			 IndexTuple itup,
-			 InsertIndexResult *res,
-			 GISTSTATE *GISTstate);
-static int gistlayerinsert(Relation r, BlockNumber blkno,
-				IndexTuple **itup,
-				int *len,
-				InsertIndexResult *res,
-				GISTSTATE *giststate);
-static OffsetNumber gistwritebuffer(Relation r,
-				Page page,
-				IndexTuple *itup,
-				int len,
-				OffsetNumber off);
-static int gistnospace(Page page,
-			IndexTuple *itvec, int len);
-static IndexTuple *gistreadbuffer(Buffer buffer, int *len);
-static IndexTuple *gistjoinvector(
-			   IndexTuple *itvec, int *len,
-			   IndexTuple *additvec, int addlen);
-static IndexTuple gistunion(Relation r, IndexTuple *itvec,
-		  int len, GISTSTATE *giststate);
-
-static IndexTuple gistgetadjusted(Relation r,
-				IndexTuple oldtup,
-				IndexTuple addtup,
-				GISTSTATE *giststate);
-static int gistfindgroup(GISTSTATE *giststate,
-			  GISTENTRY *valvec, GIST_SPLITVEC *spl);
-static void gistadjsubkey(Relation r,
-			  IndexTuple *itup, int *len,
-			  GIST_SPLITVEC *v,
-			  GISTSTATE *giststate);
-static IndexTuple gistFormTuple(GISTSTATE *giststate,
-			Relation r, Datum attdata[], int datumsize[], bool isnull[]);
-static IndexTuple *gistSplit(Relation r,
-		  Buffer buffer,
-		  IndexTuple *itup,
-		  int *len,
-		  GISTSTATE *giststate,
-		  InsertIndexResult *res);
-static void gistnewroot(Relation r,
-			IndexTuple *itup, int len);
-static void GISTInitBuffer(Buffer b, uint32 f);
-static OffsetNumber gistchoose(Relation r, Page p,
-		   IndexTuple it,
-		   GISTSTATE *giststate);
-static void gistdelete(Relation r, ItemPointer tid);
-
-#ifdef GIST_PAGEADDITEM
-static IndexTuple gist_tuple_replacekey(Relation r,
-					  GISTENTRY entry, IndexTuple t);
-#endif
-static void gistcentryinit(GISTSTATE *giststate, int nkey,
-			   GISTENTRY *e, Datum k,
-			   Relation r, Page pg,
-			   OffsetNumber o, int b, bool l, bool isNull);
-static void gistDeCompressAtt(GISTSTATE *giststate, Relation r,
-				  IndexTuple tuple, Page p, OffsetNumber o,
-				  GISTENTRY attdata[], bool decompvec[], bool isnull[]);
-static void gistFreeAtt(Relation r, GISTENTRY attdata[], bool decompvec[]);
-static void gistpenalty(GISTSTATE *giststate, int attno,
-			GISTENTRY *key1, bool isNull1,
-			GISTENTRY *key2, bool isNull2,
-			float *penalty);
-
-#undef GISTDEBUG
-
-#ifdef GISTDEBUG
-static void gist_dumptree(Relation r, int level, BlockNumber blk, OffsetNumber coff);
-#endif
-
-/*
- * routine to build an index.  Basically calls insert over and over
- */
-Datum
-gistbuild(PG_FUNCTION_ARGS)
-{
-	Relation	heap = (Relation) PG_GETARG_POINTER(0);
-	Relation	index = (Relation) PG_GETARG_POINTER(1);
-	IndexInfo  *indexInfo = (IndexInfo *) PG_GETARG_POINTER(2);
-	double		reltuples;
-	GISTBuildState buildstate;
-	Buffer		buffer;
-
-	/* no locking is needed */
-
-	initGISTstate(&buildstate.giststate, index);
-
-	/*
-	 * We expect to be called exactly once for any index relation. If
-	 * that's not the case, big trouble's what we have.
-	 */
-	if (RelationGetNumberOfBlocks(index) != 0)
-		elog(ERROR, "%s already contains data",
-			 RelationGetRelationName(index));
-
-	/* initialize the root page */
-	buffer = ReadBuffer(index, P_NEW);
-	GISTInitBuffer(buffer, F_LEAF);
-	WriteBuffer(buffer);
-
-	/* build the index */
-	buildstate.numindexattrs = indexInfo->ii_NumIndexAttrs;
-	buildstate.indtuples = 0;
-
-	/* do the heap scan */
-	reltuples = IndexBuildHeapScan(heap, index, indexInfo,
-								gistbuildCallback, (void *) &buildstate);
-
-	/* okay, all heap tuples are indexed */
-
-	/*
-	 * Since we just counted the tuples in the heap, we update its stats
-	 * in pg_class to guarantee that the planner takes advantage of the
-	 * index we just created.  But, only update statistics during normal
-	 * index definitions, not for indices on system catalogs created
-	 * during bootstrap processing.  We must close the relations before
-	 * updating statistics to guarantee that the relcache entries are
-	 * flushed when we increment the command counter in UpdateStats(). But
-	 * we do not release any locks on the relations; those will be held
-	 * until end of transaction.
-	 */
-	if (IsNormalProcessingMode())
-	{
-		Oid			hrelid = RelationGetRelid(heap);
-		Oid			irelid = RelationGetRelid(index);
-
-		heap_close(heap, NoLock);
-		index_close(index);
-		UpdateStats(hrelid, reltuples);
-		UpdateStats(irelid, buildstate.indtuples);
-	}
-
-	freeGISTstate(&buildstate.giststate);
-#ifdef GISTDEBUG
-	gist_dumptree(index, 0, GISTP_ROOT, 0);
-#endif
-
-	PG_RETURN_VOID();
-}
-
-/*
- * Per-tuple callback from IndexBuildHeapScan
- */
-static void
-gistbuildCallback(Relation index,
-				  HeapTuple htup,
-				  Datum *attdata,
-				  char *nulls,
-				  bool tupleIsAlive,
-				  void *state)
-{
-	GISTBuildState *buildstate = (GISTBuildState *) state;
-	IndexTuple	itup;
-	bool		compvec[INDEX_MAX_KEYS];
-	GISTENTRY	tmpcentry;
-	int			i;
-
-	/* GiST cannot index tuples with leading NULLs */
-	if (nulls[0] == 'n')
-		return;
-
-	/* immediately compress keys to normalize */
-	for (i = 0; i < buildstate->numindexattrs; i++)
-	{
-		if (nulls[i] == 'n')
-		{
-			attdata[i] = (Datum) 0;
-			compvec[i] = FALSE;
-		}
-		else
-		{
-			gistcentryinit(&buildstate->giststate, i, &tmpcentry, attdata[i],
-						   (Relation) NULL, (Page) NULL, (OffsetNumber) 0,
-						 -1 /* size is currently bogus */ , TRUE, FALSE);
-			if (attdata[i] != tmpcentry.key &&
-				!(isAttByVal(&buildstate->giststate, i)))
-				compvec[i] = TRUE;
-			else
-				compvec[i] = FALSE;
-			attdata[i] = tmpcentry.key;
-		}
-	}
-
-	/* form an index tuple and point it at the heap tuple */
-	itup = index_formtuple(buildstate->giststate.tupdesc, attdata, nulls);
-	itup->t_tid = htup->t_self;
-
-	/*
-	 * Since we already have the index relation locked, we call
-	 * gistdoinsert directly.  Normal access method calls dispatch through
-	 * gistinsert, which locks the relation for write.	This is the right
-	 * thing to do if you're inserting single tups, but not when you're
-	 * initializing the whole index at once.
-	 */
-	gistdoinsert(index, itup, NULL, &buildstate->giststate);
-
-	buildstate->indtuples += 1;
-
-	for (i = 0; i < buildstate->numindexattrs; i++)
-		if (compvec[i])
-			pfree(DatumGetPointer(attdata[i]));
-
-	pfree(itup);
-}
-
-/*
- *	gistinsert -- wrapper for GiST tuple insertion.
- *
- *	  This is the public interface routine for tuple insertion in GiSTs.
- *	  It doesn't do any work; just locks the relation and passes the buck.
- */
-Datum
-gistinsert(PG_FUNCTION_ARGS)
-{
-	Relation	r = (Relation) PG_GETARG_POINTER(0);
-	Datum	   *datum = (Datum *) PG_GETARG_POINTER(1);
-	char	   *nulls = (char *) PG_GETARG_POINTER(2);
-	ItemPointer ht_ctid = (ItemPointer) PG_GETARG_POINTER(3);
-#ifdef NOT_USED
-	Relation	heapRel = (Relation) PG_GETARG_POINTER(4);
-	bool		checkUnique = PG_GETARG_BOOL(5);
-#endif
-	InsertIndexResult res;
-	IndexTuple	itup;
-	GISTSTATE	giststate;
-	GISTENTRY	tmpentry;
-	int			i;
-	bool		compvec[INDEX_MAX_KEYS];
-
-	/*
-	 * Since GIST is not marked "amconcurrent" in pg_am, caller should
-	 * have acquired exclusive lock on index relation.	We need no locking
-	 * here.
-	 */
-
-	/* GiST cannot index tuples with leading NULLs */
-	if (nulls[0] == 'n')
-	{
-		res = NULL;
-		PG_RETURN_POINTER(res);
-	}
-
-	initGISTstate(&giststate, r);
-
-	/* immediately compress keys to normalize */
-	for (i = 0; i < r->rd_att->natts; i++)
-	{
-		if (nulls[i] == 'n')
-		{
-			datum[i] = (Datum) 0;
-			compvec[i] = FALSE;
-		}
-		else
-		{
-			gistcentryinit(&giststate, i, &tmpentry, datum[i],
-						   (Relation) NULL, (Page) NULL, (OffsetNumber) 0,
-						 -1 /* size is currently bogus */ , TRUE, FALSE);
-			if (datum[i] != tmpentry.key && !(isAttByVal(&giststate, i)))
-				compvec[i] = TRUE;
-			else
-				compvec[i] = FALSE;
-			datum[i] = tmpentry.key;
-		}
-	}
-	itup = index_formtuple(giststate.tupdesc, datum, nulls);
-	itup->t_tid = *ht_ctid;
-
-	res = (InsertIndexResult) palloc(sizeof(InsertIndexResultData));
-	gistdoinsert(r, itup, &res, &giststate);
-
-	for (i = 0; i < r->rd_att->natts; i++)
-		if (compvec[i] == TRUE)
-			pfree(DatumGetPointer(datum[i]));
-	pfree(itup);
-	freeGISTstate(&giststate);
-
-	PG_RETURN_POINTER(res);
-}
-
-#ifdef GIST_PAGEADDITEM
-/*
- * Take a compressed entry, and install it on a page.  Since we now know
- * where the entry will live, we decompress it and recompress it using
- * that knowledge (some compression routines may want to fish around
- * on the page, for example, or do something special for leaf nodes.)
- */
-static OffsetNumber
-gistPageAddItem(GISTSTATE *giststate,
-				Relation r,
-				Page page,
-				Item item,
-				Size size,
-				OffsetNumber offsetNumber,
-				ItemIdFlags flags,
-				GISTENTRY *dentry,
-				IndexTuple *newtup)
-{
-	GISTENTRY	tmpcentry;
-	IndexTuple	itup = (IndexTuple) item;
-	OffsetNumber retval;
-	Datum		datum;
-	bool		IsNull;
-
-	/*
-	 * recompress the item given that we now know the exact page and
-	 * offset for insertion
-	 */
-	datum = index_getattr(itup, 1, r->rd_att, &IsNull);
-	gistdentryinit(giststate, 0, dentry, datum,
-				   (Relation) 0, (Page) 0,
-				   (OffsetNumber) InvalidOffsetNumber,
-				   ATTSIZE(datum, r, 1, IsNull),
-				   FALSE, IsNull);
-	gistcentryinit(giststate, 0, &tmpcentry, dentry->key, r, page,
-				   offsetNumber, dentry->bytes, FALSE);
-	*newtup = gist_tuple_replacekey(r, tmpcentry, itup);
-	retval = PageAddItem(page, (Item) *newtup, IndexTupleSize(*newtup),
-						 offsetNumber, flags);
-	if (retval == InvalidOffsetNumber)
-		elog(ERROR, "gist: failed to add index item to %s",
-			 RelationGetRelationName(r));
-	/* be tidy */
-	if (DatumGetPointer(tmpcentry.key) != NULL &&
-		tmpcentry.key != dentry->key &&
-		tmpcentry.key != datum)
-		pfree(DatumGetPointer(tmpcentry.key));
-	return (retval);
-}
-#endif
-
-static void
-gistdoinsert(Relation r,
-			 IndexTuple itup,
-			 InsertIndexResult *res,
-			 GISTSTATE *giststate)
-{
-	IndexTuple *instup;
-	int			i,
-				ret,
-				len = 1;
-
-	instup = (IndexTuple *) palloc(sizeof(IndexTuple));
-	instup[0] = (IndexTuple) palloc(IndexTupleSize(itup));
-	memcpy(instup[0], itup, IndexTupleSize(itup));
-
-	ret = gistlayerinsert(r, GISTP_ROOT, &instup, &len, res, giststate);
-	if (ret & SPLITED)
-		gistnewroot(r, instup, len);
-
-	for (i = 0; i < len; i++)
-		pfree(instup[i]);
-	pfree(instup);
-}
-
-static int
-gistlayerinsert(Relation r, BlockNumber blkno,
-				IndexTuple **itup,		/* in - out, has compressed entry */
-				int *len,		/* in - out */
-				InsertIndexResult *res, /* out */
-				GISTSTATE *giststate)
-{
-	Buffer		buffer;
-	Page		page;
-	OffsetNumber child;
-	int			ret;
-	GISTPageOpaque opaque;
-
-	buffer = ReadBuffer(r, blkno);
-	page = (Page) BufferGetPage(buffer);
-	opaque = (GISTPageOpaque) PageGetSpecialPointer(page);
-
-	if (!(opaque->flags & F_LEAF))
-	{
-		/* internal page, so we must walk on tree */
-		/* len IS equal 1 */
-		ItemId		iid;
-		BlockNumber nblkno;
-		ItemPointerData oldtid;
-		IndexTuple	oldtup;
-
-		child = gistchoose(r, page, *(*itup), giststate);
-		iid = PageGetItemId(page, child);
-		oldtup = (IndexTuple) PageGetItem(page, iid);
-		nblkno = ItemPointerGetBlockNumber(&(oldtup->t_tid));
-
-		/*
-		 * After this call: 1. if child page was splited, then itup
-		 * contains keys for each page 2. if  child page wasn't splited,
-		 * then itup contains additional for adjustement of current key
-		 */
-		ret = gistlayerinsert(r, nblkno, itup, len, res, giststate);
-
-		/* nothing inserted in child */
-		if (!(ret & INSERTED))
-		{
-			ReleaseBuffer(buffer);
-			return 0x00;
-		}
-
-		/* child does not splited */
-		if (!(ret & SPLITED))
-		{
-			IndexTuple	newtup = gistgetadjusted(r, oldtup, (*itup)[0], giststate);
-
-			if (!newtup)
-			{
-				/* not need to update key */
-				ReleaseBuffer(buffer);
-				return 0x00;
-			}
-
-			pfree((*itup)[0]);	/* !!! */
-			(*itup)[0] = newtup;
-		}
-
-		/* key is modified, so old version must be deleted */
-		ItemPointerSet(&oldtid, blkno, child);
-		gistdelete(r, &oldtid);
-	
-		/*
-		 * if child was splitted, new key for child will be inserted
-		 * in the end list of child, so we must say to any scans
-		 * that page is changed beginning from 'child' offset
-		 */
-		if ( ret & SPLITED )
-			gistadjscans(r, GISTOP_SPLIT, blkno, child);
-	}
-
-	ret = INSERTED;
-
-	if (gistnospace(page, (*itup), *len))
-	{
-		/* no space for insertion */
-		IndexTuple *itvec,
-				   *newitup;
-		int			tlen,
-					oldlen;
-
-		ret |= SPLITED;
-		itvec = gistreadbuffer(buffer, &tlen);
-		itvec = gistjoinvector(itvec, &tlen, (*itup), *len);
-		oldlen = *len;
-		newitup = gistSplit(r, buffer, itvec, &tlen, giststate,
-							(opaque->flags & F_LEAF) ? res : NULL);		/* res only for
-																		 * inserting in leaf */
-		ReleaseBuffer(buffer);
-		do
-			pfree((*itup)[oldlen - 1]);
-		while ((--oldlen) > 0);
-		pfree((*itup));
-		pfree(itvec);
-		*itup = newitup;
-		*len = tlen;			/* now tlen >= 2 */
-	}
-	else
-	{
-		/* enogth space */
-		OffsetNumber off,
-					l;
-
-		off = (PageIsEmpty(page)) ?
-			FirstOffsetNumber
-			:
-			OffsetNumberNext(PageGetMaxOffsetNumber(page));
-		l = gistwritebuffer(r, page, (*itup), *len, off);
-		WriteBuffer(buffer);
-
-		/*
-		 * set res if insert into leaf page, in this case, len = 1 always
-		 */
-		if (res && (opaque->flags & F_LEAF))
-			ItemPointerSet(&((*res)->pointerData), blkno, l);
-
-		if (*len > 1)
-		{						/* previos insert ret & SPLITED != 0 */
-			int			i;
-
-			/*
-			 * child was splited, so we must form union for insertion in
-			 * parent
-			 */
-			IndexTuple	newtup = gistunion(r, (*itup), *len, giststate);
-
-			ItemPointerSet(&(newtup->t_tid), blkno, 1);
-
-			for (i = 0; i < *len; i++)
-				pfree((*itup)[i]);
-			(*itup)[0] = newtup;
-			*len = 1;
-		}
-	}
-
-	return ret;
-}
-
-/*
- * Write itup vector to page, has no control of free space
- */
-static OffsetNumber
-gistwritebuffer(Relation r, Page page, IndexTuple *itup,
-				int len, OffsetNumber off)
-{
-	OffsetNumber l = InvalidOffsetNumber;
-	int			i;
-
-#ifdef GIST_PAGEADDITEM
-	GISTENTRY	tmpdentry;
-	IndexTuple	newtup;
-	bool		IsNull;
-#endif
-	for (i = 0; i < len; i++)
-	{
-#ifdef GIST_PAGEADDITEM
-		l = gistPageAddItem(giststate, r, page,
-							(Item) itup[i], IndexTupleSize(itup[i]),
-							off, LP_USED, &tmpdentry, &newtup);
-		off = OffsetNumberNext(off);
-		if (DatumGetPointer(tmpdentry.key) != NULL &&
-		  tmpdentry.key != index_getattr(itup[i], 1, r->rd_att, &IsNull))
-			pfree(DatumGetPointer(tmpdentry.key));
-		if (itup[i] != newtup)
-			pfree(newtup);
-#else
-		l = PageAddItem(page, (Item) itup[i], IndexTupleSize(itup[i]),
-						off, LP_USED);
-		if (l == InvalidOffsetNumber)
-			elog(ERROR, "gist: failed to add index item to %s",
-				 RelationGetRelationName(r));
-#endif
-	}
-	return l;
-}
-
-/*
- * Check space for itup vector on page
- */
-static int
-gistnospace(Page page, IndexTuple *itvec, int len)
-{
-	unsigned int			size = 0;
-	int			i;
-
-	for (i = 0; i < len; i++)
-		size += IndexTupleSize(itvec[i]) + sizeof(ItemIdData);
-
-	return (PageGetFreeSpace(page) < size);
-}
-
-/*
- * Read buffer into itup vector
- */
-static IndexTuple *
-gistreadbuffer(Buffer buffer, int *len /* out */ )
-{
-	OffsetNumber i,
-				maxoff;
-	IndexTuple *itvec;
-	Page		p = (Page) BufferGetPage(buffer);
-
-	maxoff = PageGetMaxOffsetNumber(p);
-	*len = maxoff;
-	itvec = palloc(sizeof(IndexTuple) * maxoff);
-	for (i = FirstOffsetNumber; i <= maxoff; i = OffsetNumberNext(i))
-		itvec[i - 1] = (IndexTuple) PageGetItem(p, PageGetItemId(p, i));
-
-	return itvec;
-}
-
-/*
- * join two vectors into one
- */
-static IndexTuple *
-gistjoinvector(IndexTuple *itvec, int *len, IndexTuple *additvec, int addlen)
-{
-	itvec = (IndexTuple *) repalloc((void *) itvec, sizeof(IndexTuple) * ((*len) + addlen));
-	memmove(&itvec[*len], additvec, sizeof(IndexTuple) * addlen);
-	*len += addlen;
-	return itvec;
-}
-
-/*
- * return union of itup vector
- */
-static IndexTuple
-gistunion(Relation r, IndexTuple *itvec, int len, GISTSTATE *giststate)
-{
-	Datum		attr[INDEX_MAX_KEYS];
-	bool		whatfree[INDEX_MAX_KEYS];
-	char		isnull[INDEX_MAX_KEYS];
-	char	   *storage;
-	bytea	   *evec;
-	Datum		datum;
-	int			datumsize,
-				i,
-				j;
-	GISTENTRY	centry[INDEX_MAX_KEYS];
-	bool	   *needfree;
-	IndexTuple	newtup;
-	bool		IsNull;
-	int			reallen;
-
-	needfree = (bool *) palloc(((len == 1) ? 2 : len) * sizeof(bool));
-	/* workaround for 64-bit: ensure GISTENTRY array is maxaligned */
-	storage = (char*)palloc( ((len == 1) ? 2 : len) * sizeof(GISTENTRY) + MAXALIGN(VARHDRSZ));
-	evec = (bytea *) (storage + MAXALIGN(VARHDRSZ) - VARHDRSZ);
-
-	for (j = 0; j < r->rd_att->natts; j++)
-	{
-		reallen = 0;
-		for (i = 0; i < len; i++)
-		{
-			datum = index_getattr(itvec[i], j + 1, giststate->tupdesc, &IsNull);
-			if (IsNull)
-				continue;
-
-			gistdentryinit(giststate, j,
-						   &((GISTENTRY *) VARDATA(evec))[reallen],
-						   datum,
-					   (Relation) NULL, (Page) NULL, (OffsetNumber) NULL,
-						   ATTSIZE(datum, giststate->tupdesc, j + 1, IsNull), FALSE, IsNull);
-			if ((!isAttByVal(giststate, j)) &&
-				((GISTENTRY *) VARDATA(evec))[reallen].key != datum)
-				needfree[reallen] = TRUE;
-			else
-				needfree[reallen] = FALSE;
-			reallen++;
-		}
-
-		if (reallen == 0)
-		{
-			attr[j] = (Datum) 0;
-			isnull[j] = 'n';
-			whatfree[j] = FALSE;
-		}
-		else
-		{
-			if (reallen == 1)
-			{
-				VARATT_SIZEP(evec) = 2 * sizeof(GISTENTRY) + VARHDRSZ;
-				gistentryinit(((GISTENTRY *) VARDATA(evec))[1],
-					((GISTENTRY *) VARDATA(evec))[0].key, r, (Page) NULL,
-							  (OffsetNumber) 0, ((GISTENTRY *) VARDATA(evec))[0].bytes, FALSE);
-
-			}
-			else
-				VARATT_SIZEP(evec) = reallen * sizeof(GISTENTRY) + VARHDRSZ;
-			datum = FunctionCall2(&giststate->unionFn[j],
-								  PointerGetDatum(evec),
-								  PointerGetDatum(&datumsize));
-
-			for (i = 0; i < reallen; i++)
-				if (needfree[i])
-					pfree(DatumGetPointer(((GISTENTRY *) VARDATA(evec))[i].key));
-
-			gistcentryinit(giststate, j, &centry[j], datum,
-					   (Relation) NULL, (Page) NULL, (OffsetNumber) NULL,
-						   datumsize, FALSE, FALSE);
-			isnull[j] = ' ';
-			attr[j] = centry[j].key;
-			if (!isAttByVal(giststate, j))
-			{
-				whatfree[j] = TRUE;
-				if (centry[j].key != datum)
-					pfree(DatumGetPointer(datum));
-			}
-			else
-				whatfree[j] = FALSE;
-		}
-	}
-
-	pfree(storage);				/* pfree(evec); */
-	pfree(needfree);
-
-	newtup = (IndexTuple) index_formtuple(giststate->tupdesc, attr, isnull);
-	for (j = 0; j < r->rd_att->natts; j++)
-		if (whatfree[j])
-			pfree(DatumGetPointer(attr[j]));
-
-	return newtup;
-}
-
-
-/*
- * Forms union of oldtup and addtup, if union == oldtup then return NULL
- */
-static IndexTuple
-gistgetadjusted(Relation r, IndexTuple oldtup, IndexTuple addtup, GISTSTATE *giststate)
-{
-	bytea	   *evec;
-	Datum		datum;
-	int			datumsize;
-	bool		result,
-				neednew = false;
-	char		isnull[INDEX_MAX_KEYS],
-				whatfree[INDEX_MAX_KEYS];
-	Datum		attr[INDEX_MAX_KEYS];
-	GISTENTRY	centry[INDEX_MAX_KEYS],
-				oldatt[INDEX_MAX_KEYS],
-				addatt[INDEX_MAX_KEYS],
-			   *ev0p,
-			   *ev1p;
-	bool		olddec[INDEX_MAX_KEYS],
-				adddec[INDEX_MAX_KEYS];
-	bool		oldisnull[INDEX_MAX_KEYS],
-				addisnull[INDEX_MAX_KEYS];
-	IndexTuple	newtup = NULL;
-	char	   *storage;
-	int			j;
-
-	/* workaround for 64-bit: ensure GISTENTRY array is maxaligned */
-	storage = (char*) palloc( 2 * sizeof(GISTENTRY) + MAXALIGN(VARHDRSZ));
-	evec = (bytea *) (storage + MAXALIGN(VARHDRSZ) - VARHDRSZ);
-	VARATT_SIZEP(evec) = 2 * sizeof(GISTENTRY) + VARHDRSZ;
-	ev0p = &((GISTENTRY *) VARDATA(evec))[0];
-	ev1p = &((GISTENTRY *) VARDATA(evec))[1];
-
-	gistDeCompressAtt(giststate, r, oldtup, (Page) NULL,
-					  (OffsetNumber) 0, oldatt, olddec, oldisnull);
-
-	gistDeCompressAtt(giststate, r, addtup, (Page) NULL,
-					  (OffsetNumber) 0, addatt, adddec, addisnull);
-
-
-	for (j = 0; j < r->rd_att->natts; j++)
-	{
-		if (oldisnull[j] && addisnull[j])
-		{
-			isnull[j] = 'n';
-			attr[j] = (Datum) 0;
-			whatfree[j] = FALSE;
-		}
-		else
-		{
-			FILLEV(
-				   oldisnull[j], oldatt[j].key, oldatt[j].bytes,
-				   addisnull[j], addatt[j].key, addatt[j].bytes
-				);
-
-			datum = FunctionCall2(&giststate->unionFn[j],
-								  PointerGetDatum(evec),
-								  PointerGetDatum(&datumsize));
-
-			if (oldisnull[j] || addisnull[j])
-			{
-				if (oldisnull[j])
-					neednew = true;
-			}
-			else
-			{
-				FunctionCall3(&giststate->equalFn[j],
-							  ev0p->key,
-							  datum,
-							  PointerGetDatum(&result));
-
-				if (!result)
-					neednew = true;
-			}
-
-			if (olddec[j])
-				pfree(DatumGetPointer(oldatt[j].key));
-			if (adddec[j])
-				pfree(DatumGetPointer(addatt[j].key));
-
-			gistcentryinit(giststate, j, &centry[j], datum,
-					   (Relation) NULL, (Page) NULL, (OffsetNumber) NULL,
-						   datumsize, FALSE, FALSE);
-
-			isnull[j] = ' ';
-			attr[j] = centry[j].key;
-			if ((!isAttByVal(giststate, j)))
-			{
-				whatfree[j] = TRUE;
-				if (centry[j].key != datum)
-					pfree(DatumGetPointer(datum));
-			}
-			else
-				whatfree[j] = FALSE;
-		}
-	}
-	pfree(storage);				/* pfree(evec); */
-
-	if (neednew)
-	{
-		/* need to update key */
-		newtup = (IndexTuple) index_formtuple(giststate->tupdesc, attr, isnull);
-		newtup->t_tid = oldtup->t_tid;
-	}
-
-	for (j = 0; j < r->rd_att->natts; j++)
-		if (whatfree[j])
-			pfree(DatumGetPointer(attr[j]));
-
-	return newtup;
-}
-
-static void
-gistunionsubkey(Relation r, GISTSTATE *giststate, IndexTuple *itvec, GIST_SPLITVEC *spl)
-{
-	int			i,
-				j,
-				lr;
-	Datum	   *attr;
-	bool	   *needfree,
-				IsNull;
-	int			len,
-			   *attrsize;
-	OffsetNumber *entries;
-	bytea	   *evec;
-	char	   *storage;
-	Datum		datum;
-	int			datumsize;
-	int			reallen;
-	bool	   *isnull;
-
-	for (lr = 0; lr <= 1; lr++)
-	{
-		if (lr)
-		{
-			attrsize = spl->spl_lattrsize;
-			attr = spl->spl_lattr;
-			len = spl->spl_nleft;
-			entries = spl->spl_left;
-			isnull = spl->spl_lisnull;
-		}
-		else
-		{
-			attrsize = spl->spl_rattrsize;
-			attr = spl->spl_rattr;
-			len = spl->spl_nright;
-			entries = spl->spl_right;
-			isnull = spl->spl_risnull;
-		}
-
-		needfree = (bool *) palloc(((len == 1) ? 2 : len) * sizeof(bool));
-		/* workaround for 64-bit: ensure GISTENTRY array is maxaligned */
-		storage = (char*)palloc( ((len == 1) ? 2 : len) * sizeof(GISTENTRY) + MAXALIGN(VARHDRSZ));
-		evec = (bytea *) (storage + MAXALIGN(VARHDRSZ) - VARHDRSZ);
-
-		for (j = 1; j < r->rd_att->natts; j++)
-		{
-			reallen = 0;
-			for (i = 0; i < len; i++)
-			{
-				if (spl->spl_idgrp[entries[i]])
-					continue;
-				datum = index_getattr(itvec[entries[i] - 1], j + 1,
-									  giststate->tupdesc, &IsNull);
-				if (IsNull)
-					continue;
-				gistdentryinit(giststate, j,
-							   &((GISTENTRY *) VARDATA(evec))[reallen],
-							   datum,
-							   (Relation) NULL, (Page) NULL,
-							   (OffsetNumber) NULL,
-							   ATTSIZE(datum, giststate->tupdesc, j + 1, IsNull), FALSE, IsNull);
-				if ((!isAttByVal(giststate, j)) &&
-					((GISTENTRY *) VARDATA(evec))[reallen].key != datum)
-					needfree[reallen] = TRUE;
-				else
-					needfree[reallen] = FALSE;
-				reallen++;
-
-			}
-			if (reallen == 0)
-			{
-				datum = (Datum) 0;
-				datumsize = 0;
-				isnull[j] = true;
-			}
-			else
-			{
-				/*
-				 * ((GISTENTRY *) VARDATA(evec))[0].bytes may be not
-				 * defined, so form union with itself
-				 */
-				if (reallen == 1)
-				{
-					VARATT_SIZEP(evec) = 2 * sizeof(GISTENTRY) + VARHDRSZ;
-					memcpy((void *) &((GISTENTRY *) VARDATA(evec))[1],
-						   (void *) &((GISTENTRY *) VARDATA(evec))[0],
-						   sizeof(GISTENTRY));
-				}
-				else
-					VARATT_SIZEP(evec) = reallen * sizeof(GISTENTRY) + VARHDRSZ;
-				datum = FunctionCall2(&giststate->unionFn[j],
-									  PointerGetDatum(evec),
-									  PointerGetDatum(&datumsize));
-				isnull[j] = false;
-			}
-
-			for (i = 0; i < reallen; i++)
-				if (needfree[i])
-					pfree(DatumGetPointer(((GISTENTRY *) VARDATA(evec))[i].key));
-
-			attr[j] = datum;
-			attrsize[j] = datumsize;
-		}
-		pfree(storage);			/* pfree(evec); */
-		pfree(needfree);
-	}
-}
-
-/*
- * find group in vector with equial value
- */
-static int
-gistfindgroup(GISTSTATE *giststate, GISTENTRY *valvec, GIST_SPLITVEC *spl)
-{
-	int			i,
-				j,
-				len;
-	int			curid = 1;
-	bool		result;
-
-	/*
-	 * first key is always not null (see gistinsert), so we may not check
-	 * for nulls
-	 */
-
-	for (i = 0; i < spl->spl_nleft; i++)
-	{
-		if (spl->spl_idgrp[spl->spl_left[i]])
-			continue;
-		len = 0;
-		/* find all equal value in right part */
-		for (j = 0; j < spl->spl_nright; j++)
-		{
-			if (spl->spl_idgrp[spl->spl_right[j]])
-				continue;
-			FunctionCall3(&giststate->equalFn[0],
-						  valvec[spl->spl_left[i]].key,
-						  valvec[spl->spl_right[j]].key,
-						  PointerGetDatum(&result));
-			if (result)
-			{
-				spl->spl_idgrp[spl->spl_right[j]] = curid;
-				len++;
-			}
-		}
-		/* find all other equal value in left part */
-		if (len)
-		{
-			/* add current val to list of equial values */
-			spl->spl_idgrp[spl->spl_left[i]] = curid;
-			/* searching .. */
-			for (j = i + 1; j < spl->spl_nleft; j++)
-			{
-				if (spl->spl_idgrp[spl->spl_left[j]])
-					continue;
-				FunctionCall3(&giststate->equalFn[0],
-							  valvec[spl->spl_left[i]].key,
-							  valvec[spl->spl_left[j]].key,
-							  PointerGetDatum(&result));
-				if (result)
-				{
-					spl->spl_idgrp[spl->spl_left[j]] = curid;
-					len++;
-				}
-			}
-			spl->spl_ngrp[curid] = len + 1;
-			curid++;
-		}
-	}
-
-	return curid;
-}
-
-/*
- * Insert equivalent tuples to left or right page
- * with minimize penalty
- */
-static void
-gistadjsubkey(Relation r,
-			  IndexTuple *itup, /* contains compressed entry */
-			  int *len,
-			  GIST_SPLITVEC *v,
-			  GISTSTATE *giststate
-)
-{
-	int			curlen;
-	OffsetNumber *curwpos;
-	bool		decfree[INDEX_MAX_KEYS];
-	GISTENTRY	entry,
-				identry[INDEX_MAX_KEYS],
-			   *ev0p,
-			   *ev1p;
-	float		lpenalty,
-				rpenalty;
-	bytea	   *evec;
-	char	   *storage;
-	int			datumsize;
-	bool		isnull[INDEX_MAX_KEYS];
-	int			i,
-				j;
-	Datum		datum;
-
-	/* clear vectors */
-	curlen = v->spl_nleft;
-	curwpos = v->spl_left;
-	for (i = 0; i < v->spl_nleft; i++)
-		if (v->spl_idgrp[v->spl_left[i]] == 0)
-		{
-			*curwpos = v->spl_left[i];
-			curwpos++;
-		}
-		else
-			curlen--;
-	v->spl_nleft = curlen;
-
-	curlen = v->spl_nright;
-	curwpos = v->spl_right;
-	for (i = 0; i < v->spl_nright; i++)
-		if (v->spl_idgrp[v->spl_right[i]] == 0)
-		{
-			*curwpos = v->spl_right[i];
-			curwpos++;
-		}
-		else
-			curlen--;
-	v->spl_nright = curlen;
-
-	/* workaround for 64-bit: ensure GISTENTRY array is maxaligned */
-	storage = (char*)palloc( 2 * sizeof(GISTENTRY) + MAXALIGN(VARHDRSZ));
-	evec = (bytea *) (storage + MAXALIGN(VARHDRSZ) - VARHDRSZ);
-	VARATT_SIZEP(evec) = 2 * sizeof(GISTENTRY) + VARHDRSZ;
-	ev0p = &((GISTENTRY *) VARDATA(evec))[0];
-	ev1p = &((GISTENTRY *) VARDATA(evec))[1];
-
-	/* add equivalent tuple */
-	for (i = 0; i < *len; i++)
-	{
-		if (v->spl_idgrp[i + 1] == 0)	/* already inserted */
-			continue;
-		gistDeCompressAtt(giststate, r, itup[i], (Page) NULL, (OffsetNumber) 0,
-						  identry, decfree, isnull);
-
-		v->spl_ngrp[v->spl_idgrp[i + 1]]--;
-		if (v->spl_ngrp[v->spl_idgrp[i + 1]] == 0 &&
-		(v->spl_grpflag[v->spl_idgrp[i + 1]] & BOTH_ADDED) != BOTH_ADDED)
-		{
-
-			/* force last in group */
-			rpenalty = 1.0;
-			lpenalty = (v->spl_grpflag[v->spl_idgrp[i + 1]] & LEFT_ADDED) ? 2.0 : 0.0;
-		}
-		else
-		{
-			/* where? */
-			for (j = 1; j < r->rd_att->natts; j++)
-			{
-				gistentryinit(entry, v->spl_lattr[j], r, (Page) NULL,
-						   (OffsetNumber) 0, v->spl_lattrsize[j], FALSE);
-				gistpenalty(giststate, j, &entry, v->spl_lisnull[j],
-							&identry[j], isnull[j], &lpenalty);
-
-				gistentryinit(entry, v->spl_rattr[j], r, (Page) NULL,
-						   (OffsetNumber) 0, v->spl_rattrsize[j], FALSE);
-				gistpenalty(giststate, j, &entry, v->spl_risnull[j],
-							&identry[j], isnull[j], &rpenalty);
-
-				if (lpenalty != rpenalty)
-					break;
-			}
-		}
-		/* add */
-		if (lpenalty < rpenalty)
-		{
-			v->spl_grpflag[v->spl_idgrp[i + 1]] |= LEFT_ADDED;
-			v->spl_left[v->spl_nleft] = i + 1;
-			v->spl_nleft++;
-			for (j = 1; j < r->rd_att->natts; j++)
-			{
-				if (isnull[j] && v->spl_lisnull[j])
-				{
-					v->spl_lattr[j] = (Datum) 0;
-					v->spl_lattrsize[j] = 0;
-				}
-				else
-				{
-					FILLEV(
-						   v->spl_lisnull[j], v->spl_lattr[j], v->spl_lattrsize[j],
-						   isnull[j], identry[j].key, identry[j].bytes
-						);
-
-					datum = FunctionCall2(&giststate->unionFn[j],
-										  PointerGetDatum(evec),
-										  PointerGetDatum(&datumsize));
-
-					if ((!isAttByVal(giststate, j)) && !v->spl_lisnull[j])
-						pfree(DatumGetPointer(v->spl_lattr[j]));
-					v->spl_lattr[j] = datum;
-					v->spl_lattrsize[j] = datumsize;
-					v->spl_lisnull[j] = false;
-				}
-			}
-		}
-		else
-		{
-			v->spl_grpflag[v->spl_idgrp[i + 1]] |= RIGHT_ADDED;
-			v->spl_right[v->spl_nright] = i + 1;
-			v->spl_nright++;
-			for (j = 1; j < r->rd_att->natts; j++)
-			{
-				if (isnull[j] && v->spl_risnull[j])
-				{
-					v->spl_rattr[j] = (Datum) 0;
-					v->spl_rattrsize[j] = 0;
-				}
-				else
-				{
-					FILLEV(
-						   v->spl_risnull[j], v->spl_rattr[j], v->spl_rattrsize[j],
-						   isnull[j], identry[j].key, identry[j].bytes
-						);
-
-					datum = FunctionCall2(&giststate->unionFn[j],
-										  PointerGetDatum(evec),
-										  PointerGetDatum(&datumsize));
-
-					if ((!isAttByVal(giststate, j)) && !v->spl_risnull[j])
-						pfree(DatumGetPointer(v->spl_rattr[j]));
-
-					v->spl_rattr[j] = datum;
-					v->spl_rattrsize[j] = datumsize;
-					v->spl_risnull[j] = false;
-				}
-			}
-
-		}
-		gistFreeAtt(r, identry, decfree);
-	}
-	pfree(storage);				/* pfree(evec); */
-}
-
-/*
- *	gistSplit -- split a page in the tree.
- */
-static IndexTuple *
-gistSplit(Relation r,
-		  Buffer buffer,
-		  IndexTuple *itup,		/* contains compressed entry */
-		  int *len,
-		  GISTSTATE *giststate,
-		  InsertIndexResult *res)
-{
-	Page		p;
-	Buffer		leftbuf,
-				rightbuf;
-	Page		left,
-				right;
-	IndexTuple *lvectup,
-			   *rvectup,
-			   *newtup;
-	BlockNumber lbknum,
-				rbknum;
-	GISTPageOpaque opaque;
-	GIST_SPLITVEC v;
-	bytea	   *entryvec;
-	char	   *storage;
-	bool	   *decompvec;
-	int			i,
-				j,
-				nlen;
-	int			MaxGrpId = 1;
-	Datum		datum;
-	bool		IsNull;
-
-	p = (Page) BufferGetPage(buffer);
-	opaque = (GISTPageOpaque) PageGetSpecialPointer(p);
-
-	/*
-	 * The root of the tree is the first block in the relation.  If we're
-	 * about to split the root, we need to do some hocus-pocus to enforce
-	 * this guarantee.
-	 */
-
-	if (BufferGetBlockNumber(buffer) == GISTP_ROOT)
-	{
-		leftbuf = ReadBuffer(r, P_NEW);
-		GISTInitBuffer(leftbuf, opaque->flags);
-		lbknum = BufferGetBlockNumber(leftbuf);
-		left = (Page) BufferGetPage(leftbuf);
-	}
-	else
-	{
-		leftbuf = buffer;
-		IncrBufferRefCount(buffer);
-		lbknum = BufferGetBlockNumber(buffer);
-		left = (Page) PageGetTempPage(p, sizeof(GISTPageOpaqueData));
-	}
-
-	rightbuf = ReadBuffer(r, P_NEW);
-	GISTInitBuffer(rightbuf, opaque->flags);
-	rbknum = BufferGetBlockNumber(rightbuf);
-	right = (Page) BufferGetPage(rightbuf);
-
-	/* generate the item array */
-	/* workaround for 64-bit: ensure GISTENTRY array is maxaligned */
-	storage = palloc(MAXALIGN(VARHDRSZ) + (*len + 1) * sizeof(GISTENTRY));
-	entryvec = (bytea *) (storage + MAXALIGN(VARHDRSZ) - VARHDRSZ);
-	decompvec = (bool *) palloc( (*len + 1) * sizeof(bool));
-	VARATT_SIZEP(entryvec) = (*len + 1) * sizeof(GISTENTRY) + VARHDRSZ;
-	for (i = 1; i <= *len; i++)
-	{
-		datum = index_getattr(itup[i - 1], 1, giststate->tupdesc, &IsNull);
-		gistdentryinit(giststate, 0, &((GISTENTRY *) VARDATA(entryvec))[i],
-					   datum, r, p, i,
-		   ATTSIZE(datum, giststate->tupdesc, 1, IsNull), FALSE, IsNull);
-		if ((!isAttByVal(giststate, 0)) && ((GISTENTRY *) VARDATA(entryvec))[i].key != datum)
-			decompvec[i] = TRUE;
-		else
-			decompvec[i] = FALSE;
-	}
-
-	/*
-	 * now let the user-defined picksplit function set up the split
-	 * vector; in entryvec have no null value!!
-	 */
-	FunctionCall2(&giststate->picksplitFn[0],
-				  PointerGetDatum(entryvec),
-				  PointerGetDatum(&v));
-
-	/* compatibility with old code */
-	if (v.spl_left[v.spl_nleft - 1] == InvalidOffsetNumber)
-		v.spl_left[v.spl_nleft - 1] = (OffsetNumber) *len;
-	if (v.spl_right[v.spl_nright - 1] == InvalidOffsetNumber)
-		v.spl_right[v.spl_nright - 1] = (OffsetNumber) *len;
-
-	v.spl_lattr[0] = v.spl_ldatum;
-	v.spl_rattr[0] = v.spl_rdatum;
-	v.spl_lisnull[0] = false;
-	v.spl_risnull[0] = false;
-
-	/*
-	 * if index is multikey, then we must to try get smaller bounding box
-	 * for subkey(s)
-	 */
-	if (r->rd_att->natts > 1)
-	{
-		v.spl_idgrp = (int *) palloc(sizeof(int) * (*len + 1));
-		MemSet((void *) v.spl_idgrp, 0, sizeof(int) * (*len + 1));
-		v.spl_grpflag = (char *) palloc(sizeof(char) * (*len + 1));
-		MemSet((void *) v.spl_grpflag, 0, sizeof(char) * (*len + 1));
-		v.spl_ngrp = (int *) palloc(sizeof(int) * (*len + 1));
-
-		MaxGrpId = gistfindgroup(giststate, (GISTENTRY *) VARDATA(entryvec), &v);
-
-		/* form union of sub keys for each page (l,p) */
-		gistunionsubkey(r, giststate, itup, &v);
-
-		/*
-		 * if possible, we insert equivalent tuples with control by
-		 * penalty for a subkey(s)
-		 */
-		if (MaxGrpId > 1)
-			gistadjsubkey(r, itup, len, &v, giststate);
-
-		pfree(v.spl_idgrp);
-		pfree(v.spl_grpflag);
-		pfree(v.spl_ngrp);
-	}
-
-	/* clean up the entry vector: its keys need to be deleted, too */
-	for (i = 1; i <= *len; i++)
-		if (decompvec[i])
-			pfree(DatumGetPointer(((GISTENTRY *) VARDATA(entryvec))[i].key));
-	pfree(storage);				/* pfree(entryvec); */
-	pfree(decompvec);
-
-	/* form left and right vector */
-	lvectup = (IndexTuple *) palloc(sizeof(IndexTuple) * v.spl_nleft);
-	rvectup = (IndexTuple *) palloc(sizeof(IndexTuple) * v.spl_nright);
-
-	for (i = 0; i < v.spl_nleft; i++)
-		lvectup[i] = itup[v.spl_left[i] - 1];
-
-	for (i = 0; i < v.spl_nright; i++)
-		rvectup[i] = itup[v.spl_right[i] - 1];
-
-
-	/* write on disk (may be need another split) */
-	if (gistnospace(right, rvectup, v.spl_nright))
-	{
-		nlen = v.spl_nright;
-		newtup = gistSplit(r, rightbuf, rvectup, &nlen, giststate,
-			  (res && rvectup[nlen - 1] == itup[*len - 1]) ? res : NULL);
-		ReleaseBuffer(rightbuf);
-		for (j = 1; j < r->rd_att->natts; j++)
-			if ((!isAttByVal(giststate, j)) && !v.spl_risnull[j])
-				pfree(DatumGetPointer(v.spl_rattr[j]));
-	}
-	else
-	{
-		OffsetNumber l;
-
-		l = gistwritebuffer(r, right, rvectup, v.spl_nright, FirstOffsetNumber);
-		WriteBuffer(rightbuf);
-
-		if (res)
-			ItemPointerSet(&((*res)->pointerData), rbknum, l);
-
-		nlen = 1;
-		newtup = (IndexTuple *) palloc(sizeof(IndexTuple) * 1);
-		newtup[0] = gistFormTuple(giststate, r, v.spl_rattr, v.spl_rattrsize, v.spl_risnull);
-		ItemPointerSet(&(newtup[0]->t_tid), rbknum, 1);
-	}
-
-
-	if (gistnospace(left, lvectup, v.spl_nleft))
-	{
-		int			llen = v.spl_nleft;
-		IndexTuple *lntup;
-
-		lntup = gistSplit(r, leftbuf, lvectup, &llen, giststate,
-			  (res && lvectup[llen - 1] == itup[*len - 1]) ? res : NULL);
-		ReleaseBuffer(leftbuf);
-
-		for (j = 1; j < r->rd_att->natts; j++)
-			if ((!isAttByVal(giststate, j)) && !v.spl_lisnull[j])
-				pfree(DatumGetPointer(v.spl_lattr[j]));
-
-		newtup = gistjoinvector(newtup, &nlen, lntup, llen);
-		pfree(lntup);
-	}
-	else
-	{
-		OffsetNumber l;
-
-		l = gistwritebuffer(r, left, lvectup, v.spl_nleft, FirstOffsetNumber);
-		if (BufferGetBlockNumber(buffer) != GISTP_ROOT)
-			PageRestoreTempPage(left, p);
-
-		WriteBuffer(leftbuf);
-
-		if (res)
-			ItemPointerSet(&((*res)->pointerData), lbknum, l);
-
-		nlen += 1;
-		newtup = (IndexTuple *) repalloc((void *) newtup, sizeof(IndexTuple) * nlen);
-		newtup[nlen - 1] = gistFormTuple(giststate, r, v.spl_lattr, v.spl_lattrsize, v.spl_lisnull);
-		ItemPointerSet(&(newtup[nlen - 1]->t_tid), lbknum, 1);
-	}
-
-	/* !!! pfree */
-	pfree(rvectup);
-	pfree(lvectup);
-	pfree(v.spl_left);
-	pfree(v.spl_right);
-
-	*len = nlen;
-	return newtup;
-}
-
-static void
-gistnewroot(Relation r, IndexTuple *itup, int len)
-{
-	Buffer		b;
-	Page		p;
-
-	b = ReadBuffer(r, GISTP_ROOT);
-	GISTInitBuffer(b, 0);
-	p = BufferGetPage(b);
-
-	gistwritebuffer(r, p, itup, len, FirstOffsetNumber);
-	WriteBuffer(b);
-}
-
-static void
-GISTInitBuffer(Buffer b, uint32 f)
-{
-	GISTPageOpaque opaque;
-	Page		page;
-	Size		pageSize;
-
-	pageSize = BufferGetPageSize(b);
-
-	page = BufferGetPage(b);
-
-	PageInit(page, pageSize, sizeof(GISTPageOpaqueData));
-
-	opaque = (GISTPageOpaque) PageGetSpecialPointer(page);
-	opaque->flags = f;
-}
-
-
-/*
-** find entry with lowest penalty
-*/
-static OffsetNumber
-gistchoose(Relation r, Page p, IndexTuple it,	/* it has compressed entry */
-		   GISTSTATE *giststate)
-{
-	OffsetNumber maxoff;
-	OffsetNumber i;
-	Datum		datum;
-	float		usize;
-	OffsetNumber which;
-	float		sum_grow,
-				which_grow[INDEX_MAX_KEYS];
-	GISTENTRY	entry,
-				identry[INDEX_MAX_KEYS];
-	bool		IsNull,
-				decompvec[INDEX_MAX_KEYS],
-				isnull[INDEX_MAX_KEYS];
-	int			j;
-
-	maxoff = PageGetMaxOffsetNumber(p);
-	*which_grow = -1.0;
-	which = -1;
-	sum_grow = 1;
-	gistDeCompressAtt(giststate, r,
-					  it, (Page) NULL, (OffsetNumber) 0,
-					  identry, decompvec, isnull);
-
-	for (i = FirstOffsetNumber; i <= maxoff && sum_grow; i = OffsetNumberNext(i))
-	{
-		IndexTuple	itup = (IndexTuple) PageGetItem(p, PageGetItemId(p, i));
-
-		sum_grow = 0;
-		for (j = 0; j < r->rd_att->natts; j++)
-		{
-			datum = index_getattr(itup, j + 1, giststate->tupdesc, &IsNull);
-			gistdentryinit(giststate, j, &entry, datum, r, p, i, ATTSIZE(datum, giststate->tupdesc, j + 1, IsNull), FALSE, IsNull);
-			gistpenalty(giststate, j, &entry, IsNull, &identry[j], isnull[j], &usize);
-
-			if ((!isAttByVal(giststate, j)) && entry.key != datum)
-				pfree(DatumGetPointer(entry.key));
-
-			if (which_grow[j] < 0 || usize < which_grow[j])
-			{
-				which = i;
-				which_grow[j] = usize;
-				if (j < r->rd_att->natts - 1 && i == FirstOffsetNumber)
-					which_grow[j + 1] = -1;
-				sum_grow += which_grow[j];
-			}
-			else if (which_grow[j] == usize)
-				sum_grow += usize;
-			else
-			{
-				sum_grow = 1;
-				break;
-			}
-		}
-	}
-
-	gistFreeAtt(r, identry, decompvec);
-	return which;
-}
-
-void
-gistfreestack(GISTSTACK *s)
-{
-	GISTSTACK  *p;
-
-	while (s != (GISTSTACK *) NULL)
-	{
-		p = s->gs_parent;
-		pfree(s);
-		s = p;
-	}
-}
-
-
-/*
- * Retail deletion of a single tuple.
- *
- * NB: this is no longer called externally, but is still needed by
- * gistlayerinsert().  That dependency will have to be fixed if GIST
- * is ever going to allow concurrent insertions.
- */
-static void
-gistdelete(Relation r, ItemPointer tid)
-{
-	BlockNumber blkno;
-	OffsetNumber offnum;
-	Buffer		buf;
-	Page		page;
-
-	/*
-	 * Since GIST is not marked "amconcurrent" in pg_am, caller should
-	 * have acquired exclusive lock on index relation.	We need no locking
-	 * here.
-	 */
-
-	blkno = ItemPointerGetBlockNumber(tid);
-	offnum = ItemPointerGetOffsetNumber(tid);
-
-	/* adjust any scans that will be affected by this deletion */
-	/* NB: this works only for scans in *this* backend! */
-	gistadjscans(r, GISTOP_DEL, blkno, offnum);
-
-	/* delete the index tuple */
-	buf = ReadBuffer(r, blkno);
-	page = BufferGetPage(buf);
-
-	PageIndexTupleDelete(page, offnum);
-
-	WriteBuffer(buf);
-}
-
-/*
- * Bulk deletion of all index entries pointing to a set of heap tuples.
- * The set of target tuples is specified via a callback routine that tells
- * whether any given heap tuple (identified by ItemPointer) is being deleted.
- *
- * Result: a palloc'd struct containing statistical info for VACUUM displays.
- */
-Datum
-gistbulkdelete(PG_FUNCTION_ARGS)
-{
-	Relation	rel = (Relation) PG_GETARG_POINTER(0);
-	IndexBulkDeleteCallback callback = (IndexBulkDeleteCallback) PG_GETARG_POINTER(1);
-	void	   *callback_state = (void *) PG_GETARG_POINTER(2);
-	IndexBulkDeleteResult *result;
-	BlockNumber num_pages;
-	double		tuples_removed;
-	double		num_index_tuples;
-	IndexScanDesc iscan;
-
-	tuples_removed = 0;
-	num_index_tuples = 0;
-
-	/*
-	 * Since GIST is not marked "amconcurrent" in pg_am, caller should
-	 * have acquired exclusive lock on index relation.	We need no locking
-	 * here.
-	 */
-
-	/*
-	 * XXX generic implementation --- should be improved!
-	 */
-
-	/* walk through the entire index */
-	iscan = index_beginscan(NULL, rel, SnapshotAny, 0, (ScanKey) NULL);
-	/* including killed tuples */
-	iscan->ignore_killed_tuples = false;
-
-	while (index_getnext_indexitem(iscan, ForwardScanDirection))
-	{
-		if (callback(&iscan->xs_ctup.t_self, callback_state))
-		{
-			ItemPointerData indextup = iscan->currentItemData;
-			BlockNumber blkno;
-			OffsetNumber offnum;
-			Buffer		buf;
-			Page		page;
-
-			blkno = ItemPointerGetBlockNumber(&indextup);
-			offnum = ItemPointerGetOffsetNumber(&indextup);
-
-			/* adjust any scans that will be affected by this deletion */
-			gistadjscans(rel, GISTOP_DEL, blkno, offnum);
-
-			/* delete the index tuple */
-			buf = ReadBuffer(rel, blkno);
-			page = BufferGetPage(buf);
-
-			PageIndexTupleDelete(page, offnum);
-
-			WriteBuffer(buf);
-
-			tuples_removed += 1;
-		}
-		else
-			num_index_tuples += 1;
-	}
-
-	index_endscan(iscan);
-
-	/* return statistics */
-	num_pages = RelationGetNumberOfBlocks(rel);
-
-	result = (IndexBulkDeleteResult *) palloc(sizeof(IndexBulkDeleteResult));
-	result->num_pages = num_pages;
-	result->tuples_removed = tuples_removed;
-	result->num_index_tuples = num_index_tuples;
-
-	PG_RETURN_POINTER(result);
-}
-
-
-void
-initGISTstate(GISTSTATE *giststate, Relation index)
-{
-	int			i;
-
-	if (index->rd_att->natts > INDEX_MAX_KEYS)
-		elog(ERROR, "initGISTstate: numberOfAttributes %d > %d",
-			 index->rd_att->natts, INDEX_MAX_KEYS);
-
-	giststate->tupdesc = index->rd_att;
-
-	for (i = 0; i < index->rd_att->natts; i++)
-	{
-		fmgr_info_copy(&(giststate->consistentFn[i]),
-				   index_getprocinfo(index, i + 1, GIST_CONSISTENT_PROC),
-					   CurrentMemoryContext);
-		fmgr_info_copy(&(giststate->unionFn[i]),
-					   index_getprocinfo(index, i + 1, GIST_UNION_PROC),
-					   CurrentMemoryContext);
-		fmgr_info_copy(&(giststate->compressFn[i]),
-					 index_getprocinfo(index, i + 1, GIST_COMPRESS_PROC),
-					   CurrentMemoryContext);
-		fmgr_info_copy(&(giststate->decompressFn[i]),
-				   index_getprocinfo(index, i + 1, GIST_DECOMPRESS_PROC),
-					   CurrentMemoryContext);
-		fmgr_info_copy(&(giststate->penaltyFn[i]),
-					   index_getprocinfo(index, i + 1, GIST_PENALTY_PROC),
-					   CurrentMemoryContext);
-		fmgr_info_copy(&(giststate->picksplitFn[i]),
-					index_getprocinfo(index, i + 1, GIST_PICKSPLIT_PROC),
-					   CurrentMemoryContext);
-		fmgr_info_copy(&(giststate->equalFn[i]),
-					   index_getprocinfo(index, i + 1, GIST_EQUAL_PROC),
-					   CurrentMemoryContext);
-	}
-}
-
-void
-freeGISTstate(GISTSTATE *giststate)
-{
-	/* no work */
-}
-
-#ifdef GIST_PAGEADDITEM
-/*
-** Given an IndexTuple to be inserted on a page, this routine replaces
-** the key with another key, which may involve generating a new IndexTuple
-** if the sizes don't match or if the null status changes.
-**
-** XXX this only works for a single-column index tuple!
-*/
-static IndexTuple
-gist_tuple_replacekey(Relation r, GISTENTRY entry, IndexTuple t)
-{
-	bool		IsNull;
-	Datum		datum = index_getattr(t, 1, r->rd_att, &IsNull);
-
-	/*
-	 * If new entry fits in index tuple, copy it in.  To avoid worrying
-	 * about null-value bitmask, pass it off to the general
-	 * index_formtuple routine if either the previous or new value is
-	 * NULL.
-	 */
-	if (!IsNull && DatumGetPointer(entry.key) != NULL &&
-		(Size) entry.bytes <= ATTSIZE(datum, r, 1, IsNull))
-	{
-		memcpy(DatumGetPointer(datum),
-			   DatumGetPointer(entry.key),
-			   entry.bytes);
-		/* clear out old size */
-		t->t_info &= ~INDEX_SIZE_MASK;
-		/* or in new size */
-		t->t_info |= MAXALIGN(entry.bytes + sizeof(IndexTupleData));
-
-		return t;
-	}
-	else
-	{
-		/* generate a new index tuple for the compressed entry */
-		TupleDesc	tupDesc = r->rd_att;
-		IndexTuple	newtup;
-		char		isnull;
-
-		isnull = DatumGetPointer(entry.key) != NULL ? ' ' : 'n';
-		newtup = (IndexTuple) index_formtuple(tupDesc,
-											  &(entry.key),
-											  &isnull);
-		newtup->t_tid = t->t_tid;
-		return newtup;
-	}
-}
-#endif
-
-/*
-** initialize a GiST entry with a decompressed version of key
-*/
-void
-gistdentryinit(GISTSTATE *giststate, int nkey, GISTENTRY *e,
-			   Datum k, Relation r, Page pg, OffsetNumber o,
-			   int b, bool l, bool isNull)
-{
-	if (b && !isNull)
-	{
-		GISTENTRY  *dep;
-
-		gistentryinit(*e, k, r, pg, o, b, l);
-		dep = (GISTENTRY *)
-			DatumGetPointer(FunctionCall1(&giststate->decompressFn[nkey],
-										  PointerGetDatum(e)));
-		/* decompressFn may just return the given pointer */
-		if (dep != e)
-		{
-			gistentryinit(*e, dep->key, dep->rel, dep->page, dep->offset,
-						  dep->bytes, dep->leafkey);
-			pfree(dep);
-		}
-	}
-	else
-		gistentryinit(*e, (Datum) 0, r, pg, o, 0, l);
-}
-
-
-/*
-** initialize a GiST entry with a compressed version of key
-*/
-static void
-gistcentryinit(GISTSTATE *giststate, int nkey,
-			   GISTENTRY *e, Datum k, Relation r,
-			   Page pg, OffsetNumber o, int b, bool l, bool isNull)
-{
-	if (!isNull)
-	{
-		GISTENTRY  *cep;
-
-		gistentryinit(*e, k, r, pg, o, b, l);
-		cep = (GISTENTRY *)
-			DatumGetPointer(FunctionCall1(&giststate->compressFn[nkey],
-										  PointerGetDatum(e)));
-		/* compressFn may just return the given pointer */
-		if (cep != e)
-		{
-			gistentryinit(*e, cep->key, cep->rel, cep->page, cep->offset,
-						  cep->bytes, cep->leafkey);
-			pfree(cep);
-		}
-	}
-	else
-		gistentryinit(*e, (Datum) 0, r, pg, o, 0, l);
-}
-
-static IndexTuple
-gistFormTuple(GISTSTATE *giststate, Relation r,
-			  Datum attdata[], int datumsize[], bool isnull[])
-{
-	IndexTuple	tup;
-	char		isnullchar[INDEX_MAX_KEYS];
-	bool		whatfree[INDEX_MAX_KEYS];
-	GISTENTRY	centry[INDEX_MAX_KEYS];
-	Datum		compatt[INDEX_MAX_KEYS];
-	int			j;
-
-	for (j = 0; j < r->rd_att->natts; j++)
-	{
-		if (isnull[j])
-		{
-			isnullchar[j] = 'n';
-			compatt[j] = (Datum) 0;
-			whatfree[j] = FALSE;
-		}
-		else
-		{
-			gistcentryinit(giststate, j, &centry[j], attdata[j],
-					   (Relation) NULL, (Page) NULL, (OffsetNumber) NULL,
-						   datumsize[j], FALSE, FALSE);
-			isnullchar[j] = ' ';
-			compatt[j] = centry[j].key;
-			if (!isAttByVal(giststate, j))
-			{
-				whatfree[j] = TRUE;
-				if (centry[j].key != attdata[j])
-					pfree(DatumGetPointer(attdata[j]));
-			}
-			else
-				whatfree[j] = FALSE;
-		}
-	}
-
-	tup = (IndexTuple) index_formtuple(giststate->tupdesc, compatt, isnullchar);
-	for (j = 0; j < r->rd_att->natts; j++)
-		if (whatfree[j])
-			pfree(DatumGetPointer(compatt[j]));
-
-	return tup;
-}
-
-static void
-gistDeCompressAtt(GISTSTATE *giststate, Relation r, IndexTuple tuple, Page p,
-	OffsetNumber o, GISTENTRY attdata[], bool decompvec[], bool isnull[])
-{
-	int			i;
-	Datum		datum;
-
-	for (i = 0; i < r->rd_att->natts; i++)
-	{
-		datum = index_getattr(tuple, i + 1, giststate->tupdesc, &isnull[i]);
-		gistdentryinit(giststate, i, &attdata[i],
-					   datum, r, p, o,
-					   ATTSIZE(datum, giststate->tupdesc, i + 1, isnull[i]), FALSE, isnull[i]);
-		if (isAttByVal(giststate, i))
-			decompvec[i] = FALSE;
-		else
-		{
-			if (attdata[i].key == datum || isnull[i])
-				decompvec[i] = FALSE;
-			else
-				decompvec[i] = TRUE;
-		}
-	}
-}
-
-static void
-gistFreeAtt(Relation r, GISTENTRY attdata[], bool decompvec[])
-{
-	int			i;
-
-	for (i = 0; i < r->rd_att->natts; i++)
-		if (decompvec[i])
-			pfree(DatumGetPointer(attdata[i].key));
-}
-
-static void
-gistpenalty(GISTSTATE *giststate, int attno,
-			GISTENTRY *key1, bool isNull1,
-			GISTENTRY *key2, bool isNull2, float *penalty)
-{
-	if (giststate->penaltyFn[attno].fn_strict && (isNull1 || isNull2))
-		*penalty = 0.0;
-	else
-		FunctionCall3(&giststate->penaltyFn[attno],
-					  PointerGetDatum(key1),
-					  PointerGetDatum(key2),
-					  PointerGetDatum(penalty));
-}
-
-#ifdef GISTDEBUG
-static void
-gist_dumptree(Relation r, int level, BlockNumber blk, OffsetNumber coff)
-{
-	Buffer		buffer;
-	Page		page;
-	GISTPageOpaque opaque;
-	IndexTuple	which;
-	ItemId		iid;
-	OffsetNumber i,
-				maxoff;
-	BlockNumber cblk;
-	char	   *pred;
-
-	pred = (char *) palloc(sizeof(char) * level + 1);
-	MemSet(pred, '\t', level);
-	pred[level] = '\0';
-
-	buffer = ReadBuffer(r, blk);
-	page = (Page) BufferGetPage(buffer);
-	opaque = (GISTPageOpaque) PageGetSpecialPointer(page);
-
-	maxoff = PageGetMaxOffsetNumber(page);
-
-	elog(DEBUG3, "%sPage: %d %s blk: %d maxoff: %d free: %d", pred,
-		 coff, (opaque->flags & F_LEAF) ? "LEAF" : "INTE", (int) blk,
-		 (int) maxoff, PageGetFreeSpace(page));
-
-	for (i = FirstOffsetNumber; i <= maxoff; i = OffsetNumberNext(i))
-	{
-		iid = PageGetItemId(page, i);
-		which = (IndexTuple) PageGetItem(page, iid);
-		cblk = ItemPointerGetBlockNumber(&(which->t_tid));
-#ifdef PRINTTUPLE
-		elog(DEBUG3, "%s  Tuple. blk: %d size: %d", pred, (int) cblk,
-			 IndexTupleSize(which));
-#endif
-
-		if (!(opaque->flags & F_LEAF))
-			gist_dumptree(r, level + 1, cblk, i);
-	}
-	ReleaseBuffer(buffer);
-	pfree(pred);
-}
-#endif   /* defined GISTDEBUG */
-
-void
-gist_redo(XLogRecPtr lsn, XLogRecord *record)
-{
-	elog(PANIC, "gist_redo: unimplemented");
-}
-
-void
-gist_undo(XLogRecPtr lsn, XLogRecord *record)
-{
-	elog(PANIC, "gist_undo: unimplemented");
-}
-
-void
-gist_desc(char *buf, uint8 xl_info, char *rec)
-{
-}
diff --git a/src/backend/access/gist/gistget.c b/src/backend/access/gist/gistget.c
deleted file mode 100644
index aaa26b41d20..00000000000
--- a/src/backend/access/gist/gistget.c
+++ /dev/null
@@ -1,344 +0,0 @@
-/*-------------------------------------------------------------------------
- *
- * gistget.c
- *	  fetch tuples from a GiST scan.
- *
- *
- * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/access/gist/gistget.c,v 1.34 2002/06/20 20:29:24 momjian Exp $
- *
- *-------------------------------------------------------------------------
- */
-#include "postgres.h"
-
-#include "access/gist.h"
-#include "executor/execdebug.h"
-
-
-static OffsetNumber gistfindnext(IndexScanDesc s, Page p, OffsetNumber n,
-			 ScanDirection dir);
-static bool gistscancache(IndexScanDesc s, ScanDirection dir);
-static bool gistfirst(IndexScanDesc s, ScanDirection dir);
-static bool gistnext(IndexScanDesc s, ScanDirection dir);
-static bool gistindex_keytest(IndexTuple tuple,
-				  int scanKeySize, ScanKey key, GISTSTATE *giststate,
-				  Relation r, Page p, OffsetNumber offset);
-
-
-Datum
-gistgettuple(PG_FUNCTION_ARGS)
-{
-	IndexScanDesc s = (IndexScanDesc) PG_GETARG_POINTER(0);
-	ScanDirection dir = (ScanDirection) PG_GETARG_INT32(1);
-	bool res;
-
-	/* if we have it cached in the scan desc, just return the value */
-	if (gistscancache(s, dir))
-		PG_RETURN_BOOL(true);
-
-	/* not cached, so we'll have to do some work */
-	if (ItemPointerIsValid(&(s->currentItemData)))
-		res = gistnext(s, dir);
-	else
-		res = gistfirst(s, dir);
-	PG_RETURN_BOOL(res);
-}
-
-static bool
-gistfirst(IndexScanDesc s, ScanDirection dir)
-{
-	Buffer		b;
-	Page		p;
-	OffsetNumber n;
-	OffsetNumber maxoff;
-	GISTPageOpaque po;
-	GISTScanOpaque so;
-	GISTSTACK  *stk;
-	BlockNumber blk;
-	IndexTuple	it;
-
-	b = ReadBuffer(s->indexRelation, GISTP_ROOT);
-	p = BufferGetPage(b);
-	po = (GISTPageOpaque) PageGetSpecialPointer(p);
-	so = (GISTScanOpaque) s->opaque;
-
-	for (;;)
-	{
-		maxoff = PageGetMaxOffsetNumber(p);
-		if (ScanDirectionIsBackward(dir))
-			n = gistfindnext(s, p, maxoff, dir);
-		else
-			n = gistfindnext(s, p, FirstOffsetNumber, dir);
-
-		while (n < FirstOffsetNumber || n > maxoff)
-		{
-			ReleaseBuffer(b);
-			if (so->s_stack == (GISTSTACK *) NULL)
-				return false;
-
-			stk = so->s_stack;
-			b = ReadBuffer(s->indexRelation, stk->gs_blk);
-			p = BufferGetPage(b);
-			po = (GISTPageOpaque) PageGetSpecialPointer(p);
-			maxoff = PageGetMaxOffsetNumber(p);
-
-			if (ScanDirectionIsBackward(dir))
-				n = OffsetNumberPrev(stk->gs_child);
-			else
-				n = OffsetNumberNext(stk->gs_child);
-			so->s_stack = stk->gs_parent;
-			pfree(stk);
-
-			n = gistfindnext(s, p, n, dir);
-		}
-		if (po->flags & F_LEAF)
-		{
-			ItemPointerSet(&(s->currentItemData), BufferGetBlockNumber(b), n);
-
-			it = (IndexTuple) PageGetItem(p, PageGetItemId(p, n));
-
-			s->xs_ctup.t_self = it->t_tid;
-
-			ReleaseBuffer(b);
-			return true;
-		}
-		else
-		{
-			stk = (GISTSTACK *) palloc(sizeof(GISTSTACK));
-			stk->gs_child = n;
-			stk->gs_blk = BufferGetBlockNumber(b);
-			stk->gs_parent = so->s_stack;
-			so->s_stack = stk;
-
-			it = (IndexTuple) PageGetItem(p, PageGetItemId(p, n));
-			blk = ItemPointerGetBlockNumber(&(it->t_tid));
-
-			ReleaseBuffer(b);
-			b = ReadBuffer(s->indexRelation, blk);
-			p = BufferGetPage(b);
-			po = (GISTPageOpaque) PageGetSpecialPointer(p);
-		}
-	}
-}
-
-static bool
-gistnext(IndexScanDesc s, ScanDirection dir)
-{
-	Buffer		b;
-	Page		p;
-	OffsetNumber n;
-	OffsetNumber maxoff;
-	GISTPageOpaque po;
-	GISTScanOpaque so;
-	GISTSTACK  *stk;
-	BlockNumber blk;
-	IndexTuple	it;
-
-	blk = ItemPointerGetBlockNumber(&(s->currentItemData));
-	n = ItemPointerGetOffsetNumber(&(s->currentItemData));
-
-	if (ScanDirectionIsForward(dir))
-		n = OffsetNumberNext(n);
-	else
-		n = OffsetNumberPrev(n);
-
-	b = ReadBuffer(s->indexRelation, blk);
-	p = BufferGetPage(b);
-	po = (GISTPageOpaque) PageGetSpecialPointer(p);
-	so = (GISTScanOpaque) s->opaque;
-
-	for (;;)
-	{
-		maxoff = PageGetMaxOffsetNumber(p);
-		n = gistfindnext(s, p, n, dir);
-
-		while (n < FirstOffsetNumber || n > maxoff)
-		{
-			ReleaseBuffer(b);
-			if (so->s_stack == (GISTSTACK *) NULL)
-				return false;
-
-			stk = so->s_stack;
-			b = ReadBuffer(s->indexRelation, stk->gs_blk);
-			p = BufferGetPage(b);
-			maxoff = PageGetMaxOffsetNumber(p);
-			po = (GISTPageOpaque) PageGetSpecialPointer(p);
-
-			if (ScanDirectionIsBackward(dir))
-				n = OffsetNumberPrev(stk->gs_child);
-			else
-				n = OffsetNumberNext(stk->gs_child);
-			so->s_stack = stk->gs_parent;
-			pfree(stk);
-
-			n = gistfindnext(s, p, n, dir);
-		}
-		if (po->flags & F_LEAF)
-		{
-			ItemPointerSet(&(s->currentItemData), BufferGetBlockNumber(b), n);
-
-			it = (IndexTuple) PageGetItem(p, PageGetItemId(p, n));
-
-			s->xs_ctup.t_self = it->t_tid;
-
-			ReleaseBuffer(b);
-			return true;
-		}
-		else
-		{
-			stk = (GISTSTACK *) palloc(sizeof(GISTSTACK));
-			stk->gs_child = n;
-			stk->gs_blk = BufferGetBlockNumber(b);
-			stk->gs_parent = so->s_stack;
-			so->s_stack = stk;
-
-			it = (IndexTuple) PageGetItem(p, PageGetItemId(p, n));
-			blk = ItemPointerGetBlockNumber(&(it->t_tid));
-
-			ReleaseBuffer(b);
-			b = ReadBuffer(s->indexRelation, blk);
-			p = BufferGetPage(b);
-			po = (GISTPageOpaque) PageGetSpecialPointer(p);
-
-			if (ScanDirectionIsBackward(dir))
-				n = PageGetMaxOffsetNumber(p);
-			else
-				n = FirstOffsetNumber;
-		}
-	}
-}
-
-/* Similar to index_keytest, but decompresses the key in the IndexTuple */
-static bool
-gistindex_keytest(IndexTuple tuple,
-				  int scanKeySize,
-				  ScanKey key,
-				  GISTSTATE *giststate,
-				  Relation r,
-				  Page p,
-				  OffsetNumber offset)
-{
-	bool		isNull;
-	Datum		datum;
-	Datum		test;
-	GISTENTRY	de;
-
-	IncrIndexProcessed();
-
-	while (scanKeySize > 0)
-	{
-		datum = index_getattr(tuple,
-							  key[0].sk_attno,
-							  giststate->tupdesc,
-							  &isNull);
-		if (isNull)
-		{
-			/* XXX eventually should check if SK_ISNULL */
-			return false;
-		}
-
-/* this code from backend/access/common/indexvalid.c. But why and what???
-		if (key[0].sk_flags & SK_ISNULL)
-			return false;
-*/
-		gistdentryinit(giststate, key[0].sk_attno - 1, &de,
-					   datum, r, p, offset,
-					   IndexTupleSize(tuple) - sizeof(IndexTupleData),
-					   FALSE, isNull);
-
-		if (key[0].sk_flags & SK_COMMUTE)
-		{
-			test = FunctionCall3(&key[0].sk_func,
-								 key[0].sk_argument,
-								 PointerGetDatum(&de),
-								 ObjectIdGetDatum(key[0].sk_procedure));
-		}
-		else
-		{
-			test = FunctionCall3(&key[0].sk_func,
-								 PointerGetDatum(&de),
-								 key[0].sk_argument,
-								 ObjectIdGetDatum(key[0].sk_procedure));
-		}
-
-		if (de.key != datum && !isAttByVal(giststate, key[0].sk_attno - 1))
-			if (DatumGetPointer(de.key) != NULL)
-				pfree(DatumGetPointer(de.key));
-
-		if (DatumGetBool(test) == !!(key[0].sk_flags & SK_NEGATE))
-			return false;
-
-		scanKeySize--;
-		key++;
-	}
-	return true;
-}
-
-
-static OffsetNumber
-gistfindnext(IndexScanDesc s, Page p, OffsetNumber n, ScanDirection dir)
-{
-	OffsetNumber maxoff;
-	IndexTuple	it;
-	GISTPageOpaque po;
-	GISTScanOpaque so;
-	GISTSTATE  *giststate;
-
-	maxoff = PageGetMaxOffsetNumber(p);
-	po = (GISTPageOpaque) PageGetSpecialPointer(p);
-	so = (GISTScanOpaque) s->opaque;
-	giststate = so->giststate;
-
-	/*
-	 * If we modified the index during the scan, we may have a pointer to
-	 * a ghost tuple, before the scan.	If this is the case, back up one.
-	 */
-
-	if (so->s_flags & GS_CURBEFORE)
-	{
-		so->s_flags &= ~GS_CURBEFORE;
-		n = OffsetNumberPrev(n);
-	}
-
-	while (n >= FirstOffsetNumber && n <= maxoff)
-	{
-		it = (IndexTuple) PageGetItem(p, PageGetItemId(p, n));
-		if (gistindex_keytest(it,
-							  s->numberOfKeys, s->keyData, giststate,
-							  s->indexRelation, p, n))
-			break;
-
-		if (ScanDirectionIsBackward(dir))
-			n = OffsetNumberPrev(n);
-		else
-			n = OffsetNumberNext(n);
-	}
-
-	return n;
-}
-
-static bool
-gistscancache(IndexScanDesc s, ScanDirection dir)
-{
-	Buffer		b;
-	Page		p;
-	OffsetNumber n;
-	IndexTuple	it;
-
-	if (!(ScanDirectionIsNoMovement(dir)
-		  && ItemPointerIsValid(&(s->currentItemData))))
-		return false;
-
-	b = ReadBuffer(s->indexRelation,
-				   ItemPointerGetBlockNumber(&(s->currentItemData)));
-	p = BufferGetPage(b);
-	n = ItemPointerGetOffsetNumber(&(s->currentItemData));
-	it = (IndexTuple) PageGetItem(p, PageGetItemId(p, n));
-	s->xs_ctup.t_self = it->t_tid;
-	ReleaseBuffer(b);
-
-	return true;
-}
diff --git a/src/backend/access/gist/gistscan.c b/src/backend/access/gist/gistscan.c
deleted file mode 100644
index 9c1c92a880a..00000000000
--- a/src/backend/access/gist/gistscan.c
+++ /dev/null
@@ -1,421 +0,0 @@
-/*-------------------------------------------------------------------------
- *
- * gistscan.c
- *	  routines to manage scans on GiST index relations
- *
- *
- * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/access/gist/gistscan.c,v 1.43 2002/06/20 20:29:24 momjian Exp $
- *
- *-------------------------------------------------------------------------
- */
-#include "postgres.h"
-
-#include "access/genam.h"
-#include "access/gist.h"
-#include "access/gistscan.h"
-
-
-/* routines defined and used here */
-static void gistregscan(IndexScanDesc s);
-static void gistdropscan(IndexScanDesc s);
-static void gistadjone(IndexScanDesc s, int op, BlockNumber blkno,
-		   OffsetNumber offnum);
-static void adjuststack(GISTSTACK *stk, BlockNumber blkno);
-static void adjustiptr(IndexScanDesc s, ItemPointer iptr,
-		   int op, BlockNumber blkno, OffsetNumber offnum);
-
-/*
- *	Whenever we start a GiST scan in a backend, we register it in private
- *	space.	Then if the GiST index gets updated, we check all registered
- *	scans and adjust them if the tuple they point at got moved by the
- *	update.  We only need to do this in private space, because when we update
- *	an GiST we have a write lock on the tree, so no other process can have
- *	any locks at all on it.  A single transaction can have write and read
- *	locks on the same object, so that's why we need to handle this case.
- */
-
-typedef struct GISTScanListData
-{
-	IndexScanDesc gsl_scan;
-	struct GISTScanListData *gsl_next;
-} GISTScanListData;
-
-typedef GISTScanListData *GISTScanList;
-
-/* pointer to list of local scans on GiSTs */
-static GISTScanList GISTScans = (GISTScanList) NULL;
-
-Datum
-gistbeginscan(PG_FUNCTION_ARGS)
-{
-	Relation	r = (Relation) PG_GETARG_POINTER(0);
-	int			nkeys = PG_GETARG_INT32(1);
-	ScanKey		key = (ScanKey) PG_GETARG_POINTER(2);
-	IndexScanDesc s;
-
-	s = RelationGetIndexScan(r, nkeys, key);
-
-	gistregscan(s);
-
-	PG_RETURN_POINTER(s);
-}
-
-Datum
-gistrescan(PG_FUNCTION_ARGS)
-{
-	IndexScanDesc s = (IndexScanDesc) PG_GETARG_POINTER(0);
-	ScanKey		key = (ScanKey) PG_GETARG_POINTER(1);
-	GISTScanOpaque p;
-	int			i;
-
-	/*
-	 * Clear all the pointers.
-	 */
-	ItemPointerSetInvalid(&s->currentItemData);
-	ItemPointerSetInvalid(&s->currentMarkData);
-
-	if (s->numberOfKeys > 0)
-	{
-		memmove(s->keyData,
-				key,
-				s->numberOfKeys * sizeof(ScanKeyData));
-	}
-
-	p = (GISTScanOpaque) s->opaque;
-	if (p != (GISTScanOpaque) NULL)
-	{
-		gistfreestack(p->s_stack);
-		gistfreestack(p->s_markstk);
-		p->s_stack = p->s_markstk = (GISTSTACK *) NULL;
-		p->s_flags = 0x0;
-		for (i = 0; i < s->numberOfKeys; i++)
-		{
-			s->keyData[i].sk_procedure
-				= RelationGetGISTStrategy(s->indexRelation,
-										  s->keyData[i].sk_attno,
-										  s->keyData[i].sk_procedure);
-			s->keyData[i].sk_func = p->giststate->consistentFn[s->keyData[i].sk_attno - 1];
-		}
-	}
-	else
-	{
-		/* initialize opaque data */
-		p = (GISTScanOpaque) palloc(sizeof(GISTScanOpaqueData));
-		p->s_stack = p->s_markstk = (GISTSTACK *) NULL;
-		p->s_flags = 0x0;
-		s->opaque = p;
-		p->giststate = (GISTSTATE *) palloc(sizeof(GISTSTATE));
-		initGISTstate(p->giststate, s->indexRelation);
-		if (s->numberOfKeys > 0)
-
-			/*
-			 * * Play games here with the scan key to use the Consistent *
-			 * function for all comparisons: * 1) the sk_procedure field
-			 * will now be used to hold the *	 strategy number * 2) the
-			 * sk_func field will point to the Consistent function
-			 */
-			for (i = 0; i < s->numberOfKeys; i++)
-			{
-				s->keyData[i].sk_procedure =
-					RelationGetGISTStrategy(s->indexRelation,
-											s->keyData[i].sk_attno,
-											s->keyData[i].sk_procedure);
-				s->keyData[i].sk_func = p->giststate->consistentFn[s->keyData[i].sk_attno - 1];
-			}
-	}
-
-	PG_RETURN_VOID();
-}
-
-Datum
-gistmarkpos(PG_FUNCTION_ARGS)
-{
-	IndexScanDesc s = (IndexScanDesc) PG_GETARG_POINTER(0);
-	GISTScanOpaque p;
-	GISTSTACK  *o,
-			   *n,
-			   *tmp;
-
-	s->currentMarkData = s->currentItemData;
-	p = (GISTScanOpaque) s->opaque;
-	if (p->s_flags & GS_CURBEFORE)
-		p->s_flags |= GS_MRKBEFORE;
-	else
-		p->s_flags &= ~GS_MRKBEFORE;
-
-	o = (GISTSTACK *) NULL;
-	n = p->s_stack;
-
-	/* copy the parent stack from the current item data */
-	while (n != (GISTSTACK *) NULL)
-	{
-		tmp = (GISTSTACK *) palloc(sizeof(GISTSTACK));
-		tmp->gs_child = n->gs_child;
-		tmp->gs_blk = n->gs_blk;
-		tmp->gs_parent = o;
-		o = tmp;
-		n = n->gs_parent;
-	}
-
-	gistfreestack(p->s_markstk);
-	p->s_markstk = o;
-
-	PG_RETURN_VOID();
-}
-
-Datum
-gistrestrpos(PG_FUNCTION_ARGS)
-{
-	IndexScanDesc s = (IndexScanDesc) PG_GETARG_POINTER(0);
-	GISTScanOpaque p;
-	GISTSTACK  *o,
-			   *n,
-			   *tmp;
-
-	s->currentItemData = s->currentMarkData;
-	p = (GISTScanOpaque) s->opaque;
-	if (p->s_flags & GS_MRKBEFORE)
-		p->s_flags |= GS_CURBEFORE;
-	else
-		p->s_flags &= ~GS_CURBEFORE;
-
-	o = (GISTSTACK *) NULL;
-	n = p->s_markstk;
-
-	/* copy the parent stack from the current item data */
-	while (n != (GISTSTACK *) NULL)
-	{
-		tmp = (GISTSTACK *) palloc(sizeof(GISTSTACK));
-		tmp->gs_child = n->gs_child;
-		tmp->gs_blk = n->gs_blk;
-		tmp->gs_parent = o;
-		o = tmp;
-		n = n->gs_parent;
-	}
-
-	gistfreestack(p->s_stack);
-	p->s_stack = o;
-
-	PG_RETURN_VOID();
-}
-
-Datum
-gistendscan(PG_FUNCTION_ARGS)
-{
-	IndexScanDesc s = (IndexScanDesc) PG_GETARG_POINTER(0);
-	GISTScanOpaque p;
-
-	p = (GISTScanOpaque) s->opaque;
-
-	if (p != (GISTScanOpaque) NULL)
-	{
-		gistfreestack(p->s_stack);
-		gistfreestack(p->s_markstk);
-		if (p->giststate != NULL)
-			freeGISTstate(p->giststate);
-		pfree(s->opaque);
-	}
-
-	gistdropscan(s);
-	/* XXX don't unset read lock -- two-phase locking */
-
-	PG_RETURN_VOID();
-}
-
-static void
-gistregscan(IndexScanDesc s)
-{
-	GISTScanList l;
-
-	l = (GISTScanList) palloc(sizeof(GISTScanListData));
-	l->gsl_scan = s;
-	l->gsl_next = GISTScans;
-	GISTScans = l;
-}
-
-static void
-gistdropscan(IndexScanDesc s)
-{
-	GISTScanList l;
-	GISTScanList prev;
-
-	prev = (GISTScanList) NULL;
-
-	for (l = GISTScans;
-		 l != (GISTScanList) NULL && l->gsl_scan != s;
-		 l = l->gsl_next)
-		prev = l;
-
-	if (l == (GISTScanList) NULL)
-		elog(ERROR, "GiST scan list corrupted -- cannot find 0x%p", (void *) s);
-
-	if (prev == (GISTScanList) NULL)
-		GISTScans = l->gsl_next;
-	else
-		prev->gsl_next = l->gsl_next;
-
-	pfree(l);
-}
-
-/*
- * AtEOXact_gist() --- clean up gist subsystem at xact abort or commit.
- *
- * This is here because it needs to touch this module's static var GISTScans.
- */
-void
-AtEOXact_gist(void)
-{
-	/*
-	 * Note: these actions should only be necessary during xact abort; but
-	 * they can't hurt during a commit.
-	 */
-
-	/*
-	 * Reset the active-scans list to empty. We do not need to free the
-	 * list elements, because they're all palloc()'d, so they'll go away
-	 * at end of transaction anyway.
-	 */
-	GISTScans = NULL;
-}
-
-void
-gistadjscans(Relation rel, int op, BlockNumber blkno, OffsetNumber offnum)
-{
-	GISTScanList l;
-	Oid			relid;
-
-	relid = RelationGetRelid(rel);
-	for (l = GISTScans; l != (GISTScanList) NULL; l = l->gsl_next)
-	{
-		if (l->gsl_scan->indexRelation->rd_id == relid)
-			gistadjone(l->gsl_scan, op, blkno, offnum);
-	}
-}
-
-/*
- *	gistadjone() -- adjust one scan for update.
- *
- *		By here, the scan passed in is on a modified relation.	Op tells
- *		us what the modification is, and blkno and offind tell us what
- *		block and offset index were affected.  This routine checks the
- *		current and marked positions, and the current and marked stacks,
- *		to see if any stored location needs to be changed because of the
- *		update.  If so, we make the change here.
- */
-static void
-gistadjone(IndexScanDesc s,
-		   int op,
-		   BlockNumber blkno,
-		   OffsetNumber offnum)
-{
-	GISTScanOpaque so;
-
-	adjustiptr(s, &(s->currentItemData), op, blkno, offnum);
-	adjustiptr(s, &(s->currentMarkData), op, blkno, offnum);
-
-	so = (GISTScanOpaque) s->opaque;
-
-	if (op == GISTOP_SPLIT)
-	{
-		adjuststack(so->s_stack, blkno);
-		adjuststack(so->s_markstk, blkno);
-	}
-}
-
-/*
- *	adjustiptr() -- adjust current and marked item pointers in the scan
- *
- *		Depending on the type of update and the place it happened, we
- *		need to do nothing, to back up one record, or to start over on
- *		the same page.
- */
-static void
-adjustiptr(IndexScanDesc s,
-		   ItemPointer iptr,
-		   int op,
-		   BlockNumber blkno,
-		   OffsetNumber offnum)
-{
-	OffsetNumber curoff;
-	GISTScanOpaque so;
-
-	if (ItemPointerIsValid(iptr))
-	{
-		if (ItemPointerGetBlockNumber(iptr) == blkno)
-		{
-			curoff = ItemPointerGetOffsetNumber(iptr);
-			so = (GISTScanOpaque) s->opaque;
-
-			switch (op)
-			{
-				case GISTOP_DEL:
-					/* back up one if we need to */
-					if (curoff >= offnum)
-					{
-
-						if (curoff > FirstOffsetNumber)
-						{
-							/* just adjust the item pointer */
-							ItemPointerSet(iptr, blkno, OffsetNumberPrev(curoff));
-						}
-						else
-						{
-							/*
-							 * remember that we're before the current
-							 * tuple
-							 */
-							ItemPointerSet(iptr, blkno, FirstOffsetNumber);
-							if (iptr == &(s->currentItemData))
-								so->s_flags |= GS_CURBEFORE;
-							else
-								so->s_flags |= GS_MRKBEFORE;
-						}
-					}
-					break;
-
-				case GISTOP_SPLIT:
-					/* back to start of page on split */
-					ItemPointerSet(iptr, blkno, FirstOffsetNumber);
-					if (iptr == &(s->currentItemData))
-						so->s_flags &= ~GS_CURBEFORE;
-					else
-						so->s_flags &= ~GS_MRKBEFORE;
-					break;
-
-				default:
-					elog(ERROR, "Bad operation in GiST scan adjust: %d", op);
-			}
-		}
-	}
-}
-
-/*
- *	adjuststack() -- adjust the supplied stack for a split on a page in
- *					 the index we're scanning.
- *
- *		If a page on our parent stack has split, we need to back up to the
- *		beginning of the page and rescan it.  The reason for this is that
- *		the split algorithm for GiSTs doesn't order tuples in any useful
- *		way on a single page.  This means on that a split, we may wind up
- *		looking at some heap tuples more than once.  This is handled in the
- *		access method update code for heaps; if we've modified the tuple we
- *		are looking at already in this transaction, we ignore the update
- *		request.
- */
-/*ARGSUSED*/
-static void
-adjuststack(GISTSTACK *stk,
-			BlockNumber blkno)
-{
-	while (stk != (GISTSTACK *) NULL)
-	{
-		if (stk->gs_blk == blkno)
-			stk->gs_child = FirstOffsetNumber;
-
-		stk = stk->gs_parent;
-	}
-}
diff --git a/src/backend/access/gist/giststrat.c b/src/backend/access/gist/giststrat.c
deleted file mode 100644
index 397e3069746..00000000000
--- a/src/backend/access/gist/giststrat.c
+++ /dev/null
@@ -1,125 +0,0 @@
-/*-------------------------------------------------------------------------
- *
- * giststrat.c
- *	  strategy map data for GiSTs.
- *
- *
- * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/access/gist/Attic/giststrat.c,v 1.20 2002/06/20 20:29:24 momjian Exp $
- *
- *-------------------------------------------------------------------------
- */
-#include "postgres.h"
-
-#include "access/gist.h"
-#include "access/istrat.h"
-
-
-/*
- *	Note:  negate, commute, and negatecommute all assume that operators are
- *		   ordered as follows in the strategy map:
- *
- *		contains, contained-by
- *
- *	The negate, commute, and negatecommute arrays are used by the planner
- *	to plan indexed scans over data that appears in the qualificiation in
- *	a boolean negation, or whose operands appear in the wrong order.  For
- *	example, if the operator "<%" means "contains", and the user says
- *
- *		where not rel.box <% "(10,10,20,20)"::box
- *
- *	the planner can plan an index scan by noting that GiST indices have
- *	an operator in their operator class for negating <%.
- *
- *	Similarly, if the user says something like
- *
- *		where "(10,10,20,20)"::box <% rel.box
- *
- *	the planner can see that the GiST index on rel.box has an operator in
- *	its opclass for commuting <%, and plan the scan using that operator.
- *	This added complexity in the access methods makes the planner a lot easier
- *	to write.
- */
-
-/* if a op b, what operator tells us if (not a op b)? */
-static StrategyNumber GISTNegate[GISTNStrategies] = {
-	InvalidStrategy,
-	InvalidStrategy,
-	InvalidStrategy
-};
-
-/* if a op_1 b, what is the operator op_2 such that b op_2 a? */
-static StrategyNumber GISTCommute[GISTNStrategies] = {
-	InvalidStrategy,
-	InvalidStrategy,
-	InvalidStrategy
-};
-
-/* if a op_1 b, what is the operator op_2 such that (b !op_2 a)? */
-static StrategyNumber GISTNegateCommute[GISTNStrategies] = {
-	InvalidStrategy,
-	InvalidStrategy,
-	InvalidStrategy
-};
-
-/*
- * GiSTs do not currently support TermData (see rtree/rtstrat.c for
- * discussion of
- * TermData) -- such logic must be encoded in the user's Consistent function.
- */
-
-static StrategyExpression GISTEvaluationExpressions[GISTNStrategies] = {
-	NULL,
-	NULL,
-	NULL
-};
-
-/*
- *	If you were sufficiently attentive to detail, you would go through
- *	the ExpressionData pain above for every one of the strategies
- *	we defined.  I am not.	Now we declare the StrategyEvaluationData
- *	structure that gets shipped around to help the planner and the access
- *	method decide what sort of scan it should do, based on (a) what the
- *	user asked for, (b) what operators are defined for a particular opclass,
- *	and (c) the reams of information we supplied above.
- *
- *	The idea of all of this initialized data is to make life easier on the
- *	user when he defines a new operator class to use this access method.
- *	By filling in all the data, we let him get away with leaving holes in his
- *	operator class, and still let him use the index.  The added complexity
- *	in the access methods just isn't worth the trouble, though.
- */
-
-static StrategyEvaluationData GISTEvaluationData = {
-	GISTNStrategies,			/* # of strategies */
-	(StrategyTransformMap) GISTNegate,	/* how to do (not qual) */
-	(StrategyTransformMap) GISTCommute, /* how to swap operands */
-	(StrategyTransformMap) GISTNegateCommute,	/* how to do both */
-	GISTEvaluationExpressions
-};
-
-
-StrategyNumber
-RelationGetGISTStrategy(Relation r,
-						AttrNumber attnum,
-						RegProcedure proc)
-{
-	return RelationGetStrategy(r, attnum, &GISTEvaluationData, proc);
-}
-
-#ifdef NOT_USED
-bool
-RelationInvokeGISTStrategy(Relation r,
-						   AttrNumber attnum,
-						   StrategyNumber s,
-						   Datum left,
-						   Datum right)
-{
-	return (RelationInvokeStrategy(r, &GISTEvaluationData, attnum, s,
-								   left, right));
-}
-
-#endif