* 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 1.62 2000/07/14 22:17:28 tgl Exp $
+ * $Header: /cvsroot/pgsql/src/backend/access/gist/gist.c,v 1.96 2002/09/04 20:31:09 momjian Exp $
*
*-------------------------------------------------------------------------
*/
-
#include "postgres.h"
#include "access/genam.h"
#include "access/gistscan.h"
#include "access/heapam.h"
#include "catalog/index.h"
-#include "catalog/pg_index.h"
-#include "executor/executor.h"
#include "miscadmin.h"
-#include "utils/syscache.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 InsertIndexResult gistdoinsert(Relation r, IndexTuple itup,
+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 InsertIndexResult gistentryinsert(Relation r, GISTSTACK *stk,
- IndexTuple tup,
+static int gistlayerinsert(Relation r, BlockNumber blkno,
+ IndexTuple **itup,
+ int *len,
+ InsertIndexResult *res,
GISTSTATE *giststate);
-static void gistentryinserttwo(Relation r, GISTSTACK *stk, IndexTuple ltup,
- IndexTuple rtup, GISTSTATE *giststate);
-static void gistAdjustKeys(Relation r, GISTSTACK *stk, BlockNumber blk,
- char *datum, int att_size, GISTSTATE *giststate);
-static void gistintinsert(Relation r, GISTSTACK *stk, IndexTuple ltup,
- IndexTuple rtup, GISTSTATE *giststate);
-static InsertIndexResult gistSplit(Relation r, Buffer buffer,
- GISTSTACK *stack, IndexTuple itup,
- GISTSTATE *giststate);
-static void gistnewroot(GISTSTATE *giststate, Relation r, IndexTuple lt,
- IndexTuple rt);
+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 BlockNumber gistChooseSubtree(Relation r, IndexTuple itup, int level,
- GISTSTATE *giststate,
- GISTSTACK **retstack, Buffer *leafbuf);
-static OffsetNumber gistchoose(Relation r, Page p, IndexTuple it,
+static OffsetNumber gistchoose(Relation r, Page p,
+ IndexTuple it,
GISTSTATE *giststate);
-static int gistnospace(Page p, IndexTuple it);
-static IndexTuple gist_tuple_replacekey(Relation r, GISTENTRY entry, IndexTuple t);
-static void gistcentryinit(GISTSTATE *giststate, GISTENTRY *e, char *pr,
- Relation r, Page pg, OffsetNumber o, int b, bool l);
+static void gistdelete(Relation r, ItemPointer tid);
-#ifdef GISTDEBUG
-static char *int_range_out(INTRANGE *r);
+#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
-*/
+ * 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);
- Node *oldPred = (Node *) PG_GETARG_POINTER(3);
-#ifdef NOT_USED
- IndexStrategy istrat = (IndexStrategy) PG_GETARG_POINTER(4);
-#endif
- HeapScanDesc hscan;
- HeapTuple htup;
- IndexTuple itup;
- TupleDesc htupdesc,
- itupdesc;
- Datum attdata[INDEX_MAX_KEYS];
- char nulls[INDEX_MAX_KEYS];
- int nhtups,
- nitups;
- Node *pred = indexInfo->ii_Predicate;
-#ifndef OMIT_PARTIAL_INDEX
- TupleTable tupleTable;
- TupleTableSlot *slot;
-#endif
- ExprContext *econtext;
- InsertIndexResult res = NULL;
- GISTSTATE giststate;
- GISTENTRY tmpcentry;
- Buffer buffer = InvalidBuffer;
- bool *compvec;
- int i;
+ 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(&giststate, index);
+ 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 (oldPred == NULL && RelationGetNumberOfBlocks(index) != 0)
- elog(ERROR, "%s already contains data", RelationGetRelationName(index));
-
- /* initialize the root page (if this is a new index) */
- if (oldPred == NULL)
- {
- buffer = ReadBuffer(index, P_NEW);
- GISTInitBuffer(buffer, F_LEAF);
- WriteBuffer(buffer);
- }
-
- /* get tuple descriptors for heap and index relations */
- htupdesc = RelationGetDescr(heap);
- itupdesc = RelationGetDescr(index);
+ if (RelationGetNumberOfBlocks(index) != 0)
+ elog(ERROR, "%s already contains data",
+ RelationGetRelationName(index));
- /*
- * If this is a predicate (partial) index, we will need to evaluate
- * the predicate using ExecQual, which requires the current tuple to
- * be in a slot of a TupleTable. In addition, ExecQual must have an
- * ExprContext referring to that slot. Here, we initialize dummy
- * TupleTable and ExprContext objects for this purpose. --Nels, Feb 92
- *
- * We construct the ExprContext anyway since we need a per-tuple
- * temporary memory context for function evaluation -- tgl July 00
- */
-#ifndef OMIT_PARTIAL_INDEX
- if (pred != NULL || oldPred != NULL)
- {
- tupleTable = ExecCreateTupleTable(1);
- slot = ExecAllocTableSlot(tupleTable);
- ExecSetSlotDescriptor(slot, htupdesc);
- }
- else
- {
- tupleTable = NULL;
- slot = NULL;
- }
- econtext = MakeExprContext(slot, TransactionCommandContext);
-#else
- econtext = MakeExprContext(NULL, TransactionCommandContext);
-#endif /* OMIT_PARTIAL_INDEX */
+ /* initialize the root page */
+ buffer = ReadBuffer(index, P_NEW);
+ GISTInitBuffer(buffer, F_LEAF);
+ WriteBuffer(buffer);
/* build the index */
- nhtups = nitups = 0;
-
- compvec = (bool *) palloc(sizeof(bool) * indexInfo->ii_NumIndexAttrs);
-
- /* start a heap scan */
- hscan = heap_beginscan(heap, 0, SnapshotNow, 0, (ScanKey) NULL);
-
- while (HeapTupleIsValid(htup = heap_getnext(hscan, 0)))
- {
- MemoryContextReset(econtext->ecxt_per_tuple_memory);
-
- nhtups++;
+ buildstate.numindexattrs = indexInfo->ii_NumIndexAttrs;
+ buildstate.indtuples = 0;
-#ifndef OMIT_PARTIAL_INDEX
- /*
- * If oldPred != NULL, this is an EXTEND INDEX command, so skip
- * this tuple if it was already in the existing partial index
- */
- if (oldPred != NULL)
- {
- slot->val = htup;
- if (ExecQual((List *) oldPred, econtext, false))
- {
- nitups++;
- continue;
- }
- }
-
- /*
- * Skip this tuple if it doesn't satisfy the partial-index
- * predicate
- */
- if (pred != NULL)
- {
- slot->val = htup;
- if (!ExecQual((List *) pred, econtext, false))
- continue;
- }
-#endif /* OMIT_PARTIAL_INDEX */
-
- nitups++;
-
- /*
- * For the current heap tuple, extract all the attributes we use
- * in this index, and note which are null.
- */
- FormIndexDatum(indexInfo,
- htup,
- htupdesc,
- econtext->ecxt_per_tuple_memory,
- attdata,
- nulls);
-
- /* immediately compress keys to normalize */
- for (i = 0; i < indexInfo->ii_NumIndexAttrs; i++)
- {
- gistcentryinit(&giststate, &tmpcentry, (char *) attdata[i],
- (Relation) NULL, (Page) NULL, (OffsetNumber) 0,
- -1 /* size is currently bogus */ , TRUE);
- if (attdata[i] != (Datum) tmpcentry.pred &&
- !(giststate.keytypbyval))
- compvec[i] = TRUE;
- else
- compvec[i] = FALSE;
- attdata[i] = (Datum) tmpcentry.pred;
- }
-
- /* form an index tuple and point it at the heap tuple */
- itup = index_formtuple(itupdesc, 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.
- */
-
- res = gistdoinsert(index, itup, &giststate);
-
- for (i = 0; i < indexInfo->ii_NumIndexAttrs; i++)
- if (compvec[i])
- pfree(DatumGetPointer(attdata[i]));
-
- pfree(itup);
- pfree(res);
- }
+ /* do the heap scan */
+ reltuples = IndexBuildHeapScan(heap, index, indexInfo,
+ gistbuildCallback, (void *) &buildstate);
/* okay, all heap tuples are indexed */
- heap_endscan(hscan);
-
- pfree(compvec);
-
-#ifndef OMIT_PARTIAL_INDEX
- if (pred != NULL || oldPred != NULL)
- {
- ExecDropTupleTable(tupleTable, true);
- }
-#endif /* OMIT_PARTIAL_INDEX */
- FreeExprContext(econtext);
/*
* Since we just counted the tuples in the heap, we update its stats
{
Oid hrelid = RelationGetRelid(heap);
Oid irelid = RelationGetRelid(index);
- bool inplace = IsReindexProcessing();
heap_close(heap, NoLock);
index_close(index);
- UpdateStats(hrelid, nhtups, inplace);
- UpdateStats(irelid, nitups, inplace);
- if (oldPred != NULL && !inplace)
+ 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')
{
- if (nitups == nhtups)
- pred = NULL;
- UpdateIndexPredicate(irelid, oldPred, pred);
+ 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;
}
}
- PG_RETURN_VOID();
+ /* 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);
}
/*
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);
+ 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);
+ 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;
+ 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 */
- compvec = (bool *) palloc(sizeof(bool) * r->rd_att->natts);
for (i = 0; i < r->rd_att->natts; i++)
{
- gistcentryinit(&giststate, &tmpentry, (char *) datum[i],
- (Relation) NULL, (Page) NULL, (OffsetNumber) 0,
- -1 /* size is currently bogus */ , TRUE);
- if (datum[i] != (Datum) tmpentry.pred && !(giststate.keytypbyval))
- compvec[i] = TRUE;
- else
+ if (nulls[i] == 'n')
+ {
+ datum[i] = (Datum) 0;
compvec[i] = FALSE;
- datum[i] = (Datum) tmpentry.pred;
+ }
+ 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(RelationGetDescr(r), datum, nulls);
+ itup = index_formtuple(giststate.tupdesc, datum, nulls);
itup->t_tid = *ht_ctid;
- /*
- * Notes in ExecUtils:ExecOpenIndices()
- *
- * RelationSetLockForWrite(r);
- */
+ res = (InsertIndexResult) palloc(sizeof(InsertIndexResultData));
+ gistdoinsert(r, itup, &res, &giststate);
- res = gistdoinsert(r, itup, &giststate);
for (i = 0; i < r->rd_att->natts; i++)
if (compvec[i] == TRUE)
- pfree((char *) datum[i]);
+ pfree(DatumGetPointer(datum[i]));
pfree(itup);
- pfree(compvec);
+ 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.)
-*/
+ * 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,
{
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
*/
- gistdentryinit(giststate, dentry,
- (((char *) itup) + sizeof(IndexTupleData)),
- (Relation) 0, (Page) 0, (OffsetNumber) InvalidOffsetNumber,
- IndexTupleSize(itup) - sizeof(IndexTupleData), FALSE);
- gistcentryinit(giststate, &tmpcentry, dentry->pred, r, page,
+ 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, *dentry, itup);
+ *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 (tmpcentry.pred != dentry->pred
- && tmpcentry.pred != (((char *) itup) + sizeof(IndexTupleData)))
- pfree(tmpcentry.pred);
-
- return (PageAddItem(page, (Item) *newtup, IndexTupleSize(*newtup),
- offsetNumber, flags));
+ if (DatumGetPointer(tmpcentry.key) != NULL &&
+ tmpcentry.key != dentry->key &&
+ tmpcentry.key != datum)
+ pfree(DatumGetPointer(tmpcentry.key));
+ return (retval);
}
+#endif
-
-static InsertIndexResult
+static void
gistdoinsert(Relation r,
- IndexTuple itup, /* itup contains compressed entry */
+ IndexTuple itup,
+ InsertIndexResult *res,
GISTSTATE *giststate)
{
- GISTENTRY tmpdentry;
- InsertIndexResult res;
- OffsetNumber l;
- GISTSTACK *stack;
+ 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;
- BlockNumber blk;
Page page;
- OffsetNumber off;
- IndexTuple newtup;
+ OffsetNumber child;
+ int ret;
+ GISTPageOpaque opaque;
- /* 3rd arg is ignored for now */
- blk = gistChooseSubtree(r, itup, 0, giststate, &stack, &buffer);
+ buffer = ReadBuffer(r, blkno);
page = (Page) BufferGetPage(buffer);
+ opaque = (GISTPageOpaque) PageGetSpecialPointer(page);
- if (gistnospace(page, itup))
+ if (!(opaque->flags & F_LEAF))
{
- /* need to do a split */
- res = gistSplit(r, buffer, stack, itup, giststate);
- gistfreestack(stack);
- WriteBuffer(buffer); /* don't forget to release buffer! */
- return res;
+ /* 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);
}
- if (PageIsEmpty(page))
- off = FirstOffsetNumber;
+ 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
- off = OffsetNumberNext(PageGetMaxOffsetNumber(page));
+ {
+ /* enogth space */
+ OffsetNumber off,
+ l;
+
+ off = (PageIsEmpty(page)) ?
+ FirstOffsetNumber
+ :
+ OffsetNumberNext(PageGetMaxOffsetNumber(page));
+ l = gistwritebuffer(r, page, (*itup), *len, off);
+ WriteBuffer(buffer);
- /* add the item and write the buffer */
- l = gistPageAddItem(giststate, r, page, (Item) itup, IndexTupleSize(itup),
- off, LP_USED, &tmpdentry, &newtup);
- 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);
- /* now expand the page boundary in the parent to include the new child */
- gistAdjustKeys(r, stack, blk, tmpdentry.pred, tmpdentry.bytes, giststate);
- gistfreestack(stack);
+ if (*len > 1)
+ { /* previos insert ret & SPLITED != 0 */
+ int i;
- /* be tidy */
- if (itup != newtup)
- pfree(newtup);
- if (tmpdentry.pred != (((char *) itup) + sizeof(IndexTupleData)))
- pfree(tmpdentry.pred);
+ /*
+ * child was splited, so we must form union for insertion in
+ * parent
+ */
+ IndexTuple newtup = gistunion(r, (*itup), *len, giststate);
- /* build and return an InsertIndexResult for this insertion */
- res = (InsertIndexResult) palloc(sizeof(InsertIndexResultData));
- ItemPointerSet(&(res->pointerData), blk, l);
+ ItemPointerSet(&(newtup->t_tid), blkno, 1);
- return res;
+ 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;
-static BlockNumber
-gistChooseSubtree(Relation r, IndexTuple itup, /* itup has compressed
- * entry */
- int level,
- GISTSTATE *giststate,
- GISTSTACK **retstack /* out */ ,
- Buffer *leafbuf /* out */ )
+#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)
{
- Buffer buffer;
- BlockNumber blk;
- GISTSTACK *stack;
- Page page;
- GISTPageOpaque opaque;
- IndexTuple which;
+ unsigned int size = 0;
+ int i;
+
+ for (i = 0; i < len; i++)
+ size += IndexTupleSize(itvec[i]) + sizeof(ItemIdData);
+
+ return (PageGetFreeSpace(page) < size);
+}
- blk = GISTP_ROOT;
- buffer = InvalidBuffer;
- stack = (GISTSTACK *) NULL;
+/*
+ * Read buffer into itup vector
+ */
+static IndexTuple *
+gistreadbuffer(Buffer buffer, int *len /* out */ )
+{
+ OffsetNumber i,
+ maxoff;
+ IndexTuple *itvec;
+ Page p = (Page) BufferGetPage(buffer);
- do
+ 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++)
{
- /* let go of current buffer before getting next */
- if (buffer != InvalidBuffer)
- ReleaseBuffer(buffer);
+ reallen = 0;
+ for (i = 0; i < len; i++)
+ {
+ datum = index_getattr(itvec[i], j + 1, giststate->tupdesc, &IsNull);
+ if (IsNull)
+ continue;
- /* get next buffer */
- buffer = ReadBuffer(r, blk);
- page = (Page) BufferGetPage(buffer);
+ 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++;
+ }
- opaque = (GISTPageOpaque) PageGetSpecialPointer(page);
- if (!(opaque->flags & F_LEAF))
+ if (reallen == 0)
{
- GISTSTACK *n;
- ItemId iid;
-
- n = (GISTSTACK *) palloc(sizeof(GISTSTACK));
- n->gs_parent = stack;
- n->gs_blk = blk;
- n->gs_child = gistchoose(r, page, itup, giststate);
- stack = n;
-
- iid = PageGetItemId(page, n->gs_child);
- which = (IndexTuple) PageGetItem(page, iid);
- blk = ItemPointerGetBlockNumber(&(which->t_tid));
+ attr[j] = (Datum) 0;
+ isnull[j] = 'n';
+ whatfree[j] = FALSE;
}
- } while (!(opaque->flags & F_LEAF));
+ 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, ¢ry[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);
- *retstack = stack;
- *leafbuf = buffer;
+ 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 blk;
+ return newtup;
}
-static void
-gistAdjustKeys(Relation r,
- GISTSTACK *stk,
- BlockNumber blk,
- char *datum, /* datum is uncompressed */
- int att_size,
- GISTSTATE *giststate)
+/*
+ * Forms union of oldtup and addtup, if union == oldtup then return NULL
+ */
+static IndexTuple
+gistgetadjusted(Relation r, IndexTuple oldtup, IndexTuple addtup, GISTSTATE *giststate)
{
- char *oldud;
- Page p;
- Buffer b;
- bool result;
bytea *evec;
- GISTENTRY centry,
+ 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;
- int size,
- datumsize;
- IndexTuple tid;
+ 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];
- if (stk == (GISTSTACK *) NULL)
- return;
+ gistDeCompressAtt(giststate, r, oldtup, (Page) NULL,
+ (OffsetNumber) 0, oldatt, olddec, oldisnull);
- b = ReadBuffer(r, stk->gs_blk);
- p = BufferGetPage(b);
+ gistDeCompressAtt(giststate, r, addtup, (Page) NULL,
+ (OffsetNumber) 0, addatt, adddec, addisnull);
- oldud = (char *) PageGetItem(p, PageGetItemId(p, stk->gs_child));
- tid = (IndexTuple) oldud;
- size = IndexTupleSize((IndexTuple) oldud) - sizeof(IndexTupleData);
- oldud += sizeof(IndexTupleData);
- evec = (bytea *) palloc(2 * sizeof(GISTENTRY) + VARHDRSZ);
- VARATT_SIZEP(evec) = 2 * sizeof(GISTENTRY) + VARHDRSZ;
+ 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
+ );
- /* insert decompressed oldud into entry vector */
- gistdentryinit(giststate, &((GISTENTRY *) VARDATA(evec))[0],
- oldud, r, p, stk->gs_child,
- size, FALSE);
- ev0p = &((GISTENTRY *) VARDATA(evec))[0];
+ datum = FunctionCall2(&giststate->unionFn[j],
+ PointerGetDatum(evec),
+ PointerGetDatum(&datumsize));
- /* insert datum entry into entry vector */
- gistentryinit(((GISTENTRY *) VARDATA(evec))[1], datum,
- (Relation) NULL, (Page) NULL, (OffsetNumber) 0, att_size, FALSE);
- ev1p = &((GISTENTRY *) VARDATA(evec))[1];
+ 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, ¢ry[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;
+ }
- /* form union of decompressed entries */
- datum = (char *)
- DatumGetPointer(FunctionCall2(&giststate->unionFn,
+ 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)));
-
- /* did union leave decompressed version of oldud unchanged? */
- FunctionCall3(&giststate->equalFn,
- PointerGetDatum(ev0p->pred),
- PointerGetDatum(datum),
- PointerGetDatum(&result));
- if (!result)
+ 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++)
{
- TupleDesc td = RelationGetDescr(r);
+ 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)
+ {
- /* compress datum for storage on page */
- gistcentryinit(giststate, ¢ry, datum, ev0p->rel, ev0p->page,
- ev0p->offset, datumsize, FALSE);
- if (td->attrs[0]->attlen >= 0)
+ /* force last in group */
+ rpenalty = 1.0;
+ lpenalty = (v->spl_grpflag[v->spl_idgrp[i + 1]] & LEFT_ADDED) ? 2.0 : 0.0;
+ }
+ else
{
- memmove(oldud, centry.pred, att_size);
- gistAdjustKeys(r, stk->gs_parent, stk->gs_blk, datum, att_size,
- giststate);
+ /* 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;
+ }
}
- else if (VARSIZE(centry.pred) == VARSIZE(oldud))
+ /* add */
+ if (lpenalty < rpenalty)
{
- memmove(oldud, centry.pred, VARSIZE(centry.pred));
- gistAdjustKeys(r, stk->gs_parent, stk->gs_blk, datum, att_size,
- giststate);
+ 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;
+ }
+ }
- /*
- * * new datum is not the same size as the old. * We have to
- * delete the old entry and insert the new * one. Note that
- * this may cause a split here!
- */
- IndexTuple newtup;
- ItemPointerData oldtid;
- char *isnull;
- TupleDesc tupDesc;
- InsertIndexResult res;
-
- /* delete old tuple */
- ItemPointerSet(&oldtid, stk->gs_blk, stk->gs_child);
- DirectFunctionCall2(gistdelete,
- PointerGetDatum(r),
- PointerGetDatum(&oldtid));
-
- /* generate and insert new tuple */
- tupDesc = r->rd_att;
- isnull = (char *) palloc(r->rd_rel->relnatts);
- MemSet(isnull, ' ', r->rd_rel->relnatts);
- newtup = (IndexTuple) index_formtuple(tupDesc,
- (Datum *) ¢ry.pred, isnull);
- pfree(isnull);
- /* set pointer in new tuple to point to current child */
- ItemPointerSet(&oldtid, blk, 1);
- newtup->t_tid = oldtid;
-
- /* inserting the new entry also adjust keys above */
- res = gistentryinsert(r, stk, newtup, giststate);
-
- /* in stack, set info to point to new tuple */
- stk->gs_blk = ItemPointerGetBlockNumber(&(res->pointerData));
- stk->gs_child = ItemPointerGetOffsetNumber(&(res->pointerData));
-
- pfree(res);
}
- WriteBuffer(b);
-
- if (centry.pred != datum)
- pfree(datum);
+ gistFreeAtt(r, identry, decfree);
}
- else
- ReleaseBuffer(b);
- pfree(evec);
+ pfree(storage); /* pfree(evec); */
}
/*
* gistSplit -- split a page in the tree.
- *
*/
-static InsertIndexResult
+static IndexTuple *
gistSplit(Relation r,
Buffer buffer,
- GISTSTACK *stack,
- IndexTuple itup, /* contains compressed entry */
- GISTSTATE *giststate)
+ IndexTuple *itup, /* contains compressed entry */
+ int *len,
+ GISTSTATE *giststate,
+ InsertIndexResult *res)
{
Page p;
Buffer leftbuf,
rightbuf;
Page left,
right;
- ItemId itemid;
- IndexTuple item;
- IndexTuple ltup,
- rtup,
- newtup;
- OffsetNumber maxoff;
- OffsetNumber i;
- OffsetNumber leftoff,
- rightoff;
+ IndexTuple *lvectup,
+ *rvectup,
+ *newtup;
BlockNumber lbknum,
rbknum;
- BlockNumber bufblock;
GISTPageOpaque opaque;
- int blank;
- InsertIndexResult res;
- char *isnull;
GIST_SPLITVEC v;
- TupleDesc tupDesc;
bytea *entryvec;
+ char *storage;
bool *decompvec;
- IndexTuple item_1;
- GISTENTRY tmpdentry,
- tmpentry;
+ int i,
+ j,
+ nlen;
+ int MaxGrpId = 1;
+ Datum datum;
+ bool IsNull;
- isnull = (char *) palloc(r->rd_rel->relnatts);
- for (blank = 0; blank < r->rd_rel->relnatts; blank++)
- isnull[blank] = ' ';
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
right = (Page) BufferGetPage(rightbuf);
/* generate the item array */
- maxoff = PageGetMaxOffsetNumber(p);
- entryvec = (bytea *) palloc(VARHDRSZ + (maxoff + 2) * sizeof(GISTENTRY));
- decompvec = (bool *) palloc(VARHDRSZ + (maxoff + 2) * sizeof(bool));
- for (i = FirstOffsetNumber; i <= maxoff; i = OffsetNumberNext(i))
+ /* 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++)
{
- item_1 = (IndexTuple) PageGetItem(p, PageGetItemId(p, i));
- gistdentryinit(giststate, &((GISTENTRY *) VARDATA(entryvec))[i],
- (((char *) item_1) + sizeof(IndexTupleData)),
- r, p, i,
- IndexTupleSize(item_1) - sizeof(IndexTupleData), FALSE);
- if ((char *) (((GISTENTRY *) VARDATA(entryvec))[i].pred)
- == (((char *) item_1) + sizeof(IndexTupleData)))
- decompvec[i] = FALSE;
- else
+ 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;
}
- /* add the new datum as the last entry */
- gistdentryinit(giststate, &(((GISTENTRY *) VARDATA(entryvec))[maxoff + 1]),
- (((char *) itup) + sizeof(IndexTupleData)),
- (Relation) NULL, (Page) NULL,
- (OffsetNumber) 0, tmpentry.bytes, FALSE);
- if ((char *) (((GISTENTRY *) VARDATA(entryvec))[maxoff + 1]).pred !=
- (((char *) itup) + sizeof(IndexTupleData)))
- decompvec[maxoff + 1] = TRUE;
- else
- decompvec[maxoff + 1] = FALSE;
-
- VARATT_SIZEP(entryvec) = (maxoff + 2) * sizeof(GISTENTRY) + VARHDRSZ;
-
- /* now let the user-defined picksplit function set up the split vector */
- FunctionCall2(&giststate->picksplitFn,
+ /*
+ * 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));
- /* compress ldatum and rdatum */
- gistcentryinit(giststate, &tmpentry, v.spl_ldatum, (Relation) NULL,
- (Page) NULL, (OffsetNumber) 0,
- ((GISTENTRY *) VARDATA(entryvec))[i].bytes, FALSE);
- if (v.spl_ldatum != tmpentry.pred)
- pfree(v.spl_ldatum);
- v.spl_ldatum = tmpentry.pred;
-
- gistcentryinit(giststate, &tmpentry, v.spl_rdatum, (Relation) NULL,
- (Page) NULL, (OffsetNumber) 0,
- ((GISTENTRY *) VARDATA(entryvec))[i].bytes, FALSE);
- if (v.spl_rdatum != tmpentry.pred)
- pfree(v.spl_rdatum);
- v.spl_rdatum = tmpentry.pred;
-
- /* clean up the entry vector: its preds need to be deleted, too */
- for (i = FirstOffsetNumber; i <= maxoff + 1; i = OffsetNumberNext(i))
- if (decompvec[i])
- pfree(((GISTENTRY *) VARDATA(entryvec))[i].pred);
- pfree(entryvec);
- pfree(decompvec);
-
- leftoff = rightoff = FirstOffsetNumber;
- maxoff = PageGetMaxOffsetNumber(p);
- for (i = FirstOffsetNumber; i <= maxoff; i = OffsetNumberNext(i))
- {
- itemid = PageGetItemId(p, i);
- item = (IndexTuple) PageGetItem(p, itemid);
-
- if (i == *(v.spl_left))
- {
- gistPageAddItem(giststate, r, left, (Item) item,
- IndexTupleSize(item),
- leftoff, LP_USED, &tmpdentry, &newtup);
- leftoff = OffsetNumberNext(leftoff);
- v.spl_left++; /* advance in left split vector */
- /* be tidy */
- if (tmpdentry.pred != (((char *) item) + sizeof(IndexTupleData)))
- pfree(tmpdentry.pred);
- if ((IndexTuple) item != newtup)
- pfree(newtup);
- }
- else
- {
- gistPageAddItem(giststate, r, right, (Item) item,
- IndexTupleSize(item),
- rightoff, LP_USED, &tmpdentry, &newtup);
- rightoff = OffsetNumberNext(rightoff);
- v.spl_right++; /* advance in right split vector */
- /* be tidy */
- if (tmpdentry.pred != (((char *) item) + sizeof(IndexTupleData)))
- pfree(tmpdentry.pred);
- if (item != newtup)
- pfree(newtup);
- }
- }
-
- /* build an InsertIndexResult for this insertion */
- res = (InsertIndexResult) palloc(sizeof(InsertIndexResultData));
-
- /* now insert the new index tuple */
- if (*(v.spl_left) != FirstOffsetNumber)
- {
- gistPageAddItem(giststate, r, left, (Item) itup,
- IndexTupleSize(itup),
- leftoff, LP_USED, &tmpdentry, &newtup);
- leftoff = OffsetNumberNext(leftoff);
- ItemPointerSet(&(res->pointerData), lbknum, leftoff);
- /* be tidy */
- if (tmpdentry.pred != (((char *) itup) + sizeof(IndexTupleData)))
- pfree(tmpdentry.pred);
- if (itup != newtup)
- pfree(newtup);
- }
- else
- {
- gistPageAddItem(giststate, r, right, (Item) itup,
- IndexTupleSize(itup),
- rightoff, LP_USED, &tmpdentry, &newtup);
- rightoff = OffsetNumberNext(rightoff);
- ItemPointerSet(&(res->pointerData), rbknum, rightoff);
- /* be tidy */
- if (tmpdentry.pred != (((char *) itup) + sizeof(IndexTupleData)))
- pfree(tmpdentry.pred);
- if (itup != newtup)
- pfree(newtup);
- }
+ /* 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;
- if ((bufblock = BufferGetBlockNumber(buffer)) != GISTP_ROOT)
- PageRestoreTempPage(left, p);
- WriteBuffer(leftbuf);
- WriteBuffer(rightbuf);
+ v.spl_lattr[0] = v.spl_ldatum;
+ v.spl_rattr[0] = v.spl_rdatum;
+ v.spl_lisnull[0] = false;
+ v.spl_risnull[0] = false;
/*
- * Okay, the page is split. We have three things left to do:
- *
- * 1) Adjust any active scans on this index to cope with changes we
- * introduced in its structure by splitting this page.
- *
- * 2) "Tighten" the bounding box of the pointer to the left page in the
- * parent node in the tree, if any. Since we moved a bunch of stuff
- * off the left page, we expect it to get smaller. This happens in
- * the internal insertion routine.
- *
- * 3) Insert a pointer to the right page in the parent. This may cause
- * the parent to split. If it does, we need to repeat steps one and
- * two for each split node in the tree.
+ * 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);
- /* adjust active scans */
- gistadjscans(r, GISTOP_SPLIT, bufblock, FirstOffsetNumber);
+ /* form union of sub keys for each page (l,p) */
+ gistunionsubkey(r, giststate, itup, &v);
- tupDesc = r->rd_att;
+ /*
+ * if possible, we insert equivalent tuples with control by
+ * penalty for a subkey(s)
+ */
+ if (MaxGrpId > 1)
+ gistadjsubkey(r, itup, len, &v, giststate);
- ltup = (IndexTuple) index_formtuple(tupDesc,
- (Datum *) &(v.spl_ldatum), isnull);
- rtup = (IndexTuple) index_formtuple(tupDesc,
- (Datum *) &(v.spl_rdatum), isnull);
- pfree(isnull);
+ pfree(v.spl_idgrp);
+ pfree(v.spl_grpflag);
+ pfree(v.spl_ngrp);
+ }
- /* set pointers to new child pages in the internal index tuples */
- ItemPointerSet(&(ltup->t_tid), lbknum, 1);
- ItemPointerSet(&(rtup->t_tid), rbknum, 1);
+ /* 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);
- gistintinsert(r, stack, ltup, rtup, giststate);
+ /* form left and right vector */
+ lvectup = (IndexTuple *) palloc(sizeof(IndexTuple) * v.spl_nleft);
+ rvectup = (IndexTuple *) palloc(sizeof(IndexTuple) * v.spl_nright);
- pfree(ltup);
- pfree(rtup);
+ for (i = 0; i < v.spl_nleft; i++)
+ lvectup[i] = itup[v.spl_left[i] - 1];
- return res;
-}
+ for (i = 0; i < v.spl_nright; i++)
+ rvectup[i] = itup[v.spl_right[i] - 1];
-/*
-** After a split, we need to overwrite the old entry's key in the parent,
-** and install install an entry for the new key into the parent.
-*/
-static void
-gistintinsert(Relation r,
- GISTSTACK *stk,
- IndexTuple ltup, /* new version of entry for old page */
- IndexTuple rtup, /* entry for new page */
- GISTSTATE *giststate)
-{
- ItemPointerData ltid;
- if (stk == (GISTSTACK *) NULL)
+ /* write on disk (may be need another split) */
+ if (gistnospace(right, rvectup, v.spl_nright))
{
- gistnewroot(giststate, r, ltup, rtup);
- return;
+ 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;
- /* remove old left pointer, insert the 2 new entries */
- ItemPointerSet(<id, stk->gs_blk, stk->gs_child);
- DirectFunctionCall2(gistdelete,
- PointerGetDatum(r),
- PointerGetDatum(<id));
- gistentryinserttwo(r, stk, ltup, rtup, giststate);
-}
+ l = gistwritebuffer(r, right, rvectup, v.spl_nright, FirstOffsetNumber);
+ WriteBuffer(rightbuf);
+ if (res)
+ ItemPointerSet(&((*res)->pointerData), rbknum, l);
-/*
-** Insert two entries onto one page, handling a split for either one!
-*/
-static void
-gistentryinserttwo(Relation r, GISTSTACK *stk, IndexTuple ltup,
- IndexTuple rtup, GISTSTATE *giststate)
-{
- Buffer b;
- Page p;
- InsertIndexResult res;
- GISTENTRY tmpentry;
- IndexTuple newtup;
+ 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);
+ }
- b = ReadBuffer(r, stk->gs_blk);
- p = BufferGetPage(b);
- if (gistnospace(p, ltup))
+ if (gistnospace(left, lvectup, v.spl_nleft))
{
- res = gistSplit(r, b, stk->gs_parent, ltup, giststate);
- WriteBuffer(b); /* don't forget to release buffer! -
- * 01/31/94 */
- pfree(res);
- gistdoinsert(r, rtup, giststate);
+ 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
{
- gistPageAddItem(giststate, r, p, (Item) ltup,
- IndexTupleSize(ltup), InvalidOffsetNumber,
- LP_USED, &tmpentry, &newtup);
- WriteBuffer(b);
- gistAdjustKeys(r, stk->gs_parent, stk->gs_blk, tmpentry.pred,
- tmpentry.bytes, giststate);
- /* be tidy */
- if (tmpentry.pred != (((char *) ltup) + sizeof(IndexTupleData)))
- pfree(tmpentry.pred);
- if (ltup != newtup)
- pfree(newtup);
- gistentryinsert(r, stk, rtup, giststate);
- }
-}
+ OffsetNumber l;
+ l = gistwritebuffer(r, left, lvectup, v.spl_nleft, FirstOffsetNumber);
+ if (BufferGetBlockNumber(buffer) != GISTP_ROOT)
+ PageRestoreTempPage(left, p);
-/*
-** Insert an entry onto a page
-*/
-static InsertIndexResult
-gistentryinsert(Relation r, GISTSTACK *stk, IndexTuple tup,
- GISTSTATE *giststate)
-{
- Buffer b;
- Page p;
- InsertIndexResult res;
- OffsetNumber off;
- GISTENTRY tmpentry;
- IndexTuple newtup;
+ WriteBuffer(leftbuf);
- b = ReadBuffer(r, stk->gs_blk);
- p = BufferGetPage(b);
+ if (res)
+ ItemPointerSet(&((*res)->pointerData), lbknum, l);
- if (gistnospace(p, tup))
- {
- res = gistSplit(r, b, stk->gs_parent, tup, giststate);
- WriteBuffer(b); /* don't forget to release buffer! -
- * 01/31/94 */
- return res;
+ 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);
}
- else
- {
- res = (InsertIndexResult) palloc(sizeof(InsertIndexResultData));
- off = gistPageAddItem(giststate, r, p, (Item) tup, IndexTupleSize(tup),
- InvalidOffsetNumber, LP_USED, &tmpentry, &newtup);
- WriteBuffer(b);
- ItemPointerSet(&(res->pointerData), stk->gs_blk, off);
- gistAdjustKeys(r, stk->gs_parent, stk->gs_blk, tmpentry.pred,
- tmpentry.bytes, giststate);
- /* be tidy */
- if (tmpentry.pred != (((char *) tup) + sizeof(IndexTupleData)))
- pfree(tmpentry.pred);
- if (tup != newtup)
- pfree(newtup);
- return res;
- }
-}
+ /* !!! pfree */
+ pfree(rvectup);
+ pfree(lvectup);
+ pfree(v.spl_left);
+ pfree(v.spl_right);
+
+ *len = nlen;
+ return newtup;
+}
static void
-gistnewroot(GISTSTATE *giststate, Relation r, IndexTuple lt, IndexTuple rt)
+gistnewroot(Relation r, IndexTuple *itup, int len)
{
Buffer b;
Page p;
- GISTENTRY tmpentry;
- IndexTuple newtup;
b = ReadBuffer(r, GISTP_ROOT);
GISTInitBuffer(b, 0);
p = BufferGetPage(b);
- gistPageAddItem(giststate, r, p, (Item) lt, IndexTupleSize(lt),
- FirstOffsetNumber,
- LP_USED, &tmpentry, &newtup);
- /* be tidy */
- if (tmpentry.pred != (((char *) lt) + sizeof(IndexTupleData)))
- pfree(tmpentry.pred);
- if (lt != newtup)
- pfree(newtup);
- gistPageAddItem(giststate, r, p, (Item) rt, IndexTupleSize(rt),
- OffsetNumberNext(FirstOffsetNumber), LP_USED,
- &tmpentry, &newtup);
- /* be tidy */
- if (tmpentry.pred != (((char *) rt) + sizeof(IndexTupleData)))
- pfree(tmpentry.pred);
- if (rt != newtup)
- pfree(newtup);
+
+ gistwritebuffer(r, p, itup, len, FirstOffsetNumber);
WriteBuffer(b);
}
pageSize = BufferGetPageSize(b);
page = BufferGetPage(b);
- MemSet(page, 0, (int) pageSize);
+
PageInit(page, pageSize, sizeof(GISTPageOpaqueData));
opaque = (GISTPageOpaque) PageGetSpecialPointer(page);
{
OffsetNumber maxoff;
OffsetNumber i;
- char *id;
- char *datum;
+ Datum datum;
float usize;
OffsetNumber which;
- float which_grow;
+ float sum_grow,
+ which_grow[INDEX_MAX_KEYS];
GISTENTRY entry,
- identry;
- int size,
- idsize;
+ identry[INDEX_MAX_KEYS];
+ bool IsNull,
+ decompvec[INDEX_MAX_KEYS],
+ isnull[INDEX_MAX_KEYS];
+ int j;
- idsize = IndexTupleSize(it) - sizeof(IndexTupleData);
- id = ((char *) it) + sizeof(IndexTupleData);
maxoff = PageGetMaxOffsetNumber(p);
- which_grow = -1.0;
+ *which_grow = -1.0;
which = -1;
+ sum_grow = 1;
+ gistDeCompressAtt(giststate, r,
+ it, (Page) NULL, (OffsetNumber) 0,
+ identry, decompvec, isnull);
- gistdentryinit(giststate, &identry, id, (Relation) NULL, (Page) NULL,
- (OffsetNumber) 0, idsize, FALSE);
-
- for (i = FirstOffsetNumber; i <= maxoff; i = OffsetNumberNext(i))
+ for (i = FirstOffsetNumber; i <= maxoff && sum_grow; i = OffsetNumberNext(i))
{
- datum = (char *) PageGetItem(p, PageGetItemId(p, i));
- size = IndexTupleSize(datum) - sizeof(IndexTupleData);
- datum += sizeof(IndexTupleData);
- gistdentryinit(giststate, &entry, datum, r, p, i, size, FALSE);
- FunctionCall3(&giststate->penaltyFn,
- PointerGetDatum(&entry),
- PointerGetDatum(&identry),
- PointerGetDatum(&usize));
- if (which_grow < 0 || usize < which_grow)
+ IndexTuple itup = (IndexTuple) PageGetItem(p, PageGetItemId(p, i));
+
+ sum_grow = 0;
+ for (j = 0; j < r->rd_att->natts; j++)
{
- which = i;
- which_grow = usize;
- if (which_grow == 0)
+ 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;
+ }
}
- if (entry.pred != datum)
- pfree(entry.pred);
}
- if (identry.pred != id)
- pfree(identry.pred);
+ gistFreeAtt(r, identry, decompvec);
return which;
}
-static int
-gistnospace(Page p, IndexTuple it)
-{
- return PageGetFreeSpace(p) < IndexTupleSize(it);
-}
-
void
gistfreestack(GISTSTACK *s)
{
/*
-** remove an entry from a page
-*/
-Datum
-gistdelete(PG_FUNCTION_ARGS)
+ * 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)
{
- Relation r = (Relation) PG_GETARG_POINTER(0);
- ItemPointer tid = (ItemPointer) PG_GETARG_POINTER(1);
BlockNumber blkno;
OffsetNumber offnum;
Buffer buf;
Page page;
/*
- * Notes in ExecUtils:ExecOpenIndices() Also note that only vacuum
- * deletes index tuples now...
- *
- * RelationSetLockForWrite(r);
+ * 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 */
PageIndexTupleDelete(page, offnum);
WriteBuffer(buf);
+}
- PG_RETURN_VOID();
+/*
+ * 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)
{
- RegProcedure consistent_proc,
- union_proc,
- compress_proc,
- decompress_proc;
- RegProcedure penalty_proc,
- picksplit_proc,
- equal_proc;
- HeapTuple htup;
- Form_pg_index itupform;
-
- consistent_proc = index_getprocid(index, 1, GIST_CONSISTENT_PROC);
- union_proc = index_getprocid(index, 1, GIST_UNION_PROC);
- compress_proc = index_getprocid(index, 1, GIST_COMPRESS_PROC);
- decompress_proc = index_getprocid(index, 1, GIST_DECOMPRESS_PROC);
- penalty_proc = index_getprocid(index, 1, GIST_PENALTY_PROC);
- picksplit_proc = index_getprocid(index, 1, GIST_PICKSPLIT_PROC);
- equal_proc = index_getprocid(index, 1, GIST_EQUAL_PROC);
- fmgr_info(consistent_proc, &giststate->consistentFn);
- fmgr_info(union_proc, &giststate->unionFn);
- fmgr_info(compress_proc, &giststate->compressFn);
- fmgr_info(decompress_proc, &giststate->decompressFn);
- fmgr_info(penalty_proc, &giststate->penaltyFn);
- fmgr_info(picksplit_proc, &giststate->picksplitFn);
- fmgr_info(equal_proc, &giststate->equalFn);
-
- /* see if key type is different from type of attribute being indexed */
- htup = SearchSysCacheTuple(INDEXRELID,
- ObjectIdGetDatum(RelationGetRelid(index)),
- 0, 0, 0);
- itupform = (Form_pg_index) GETSTRUCT(htup);
- if (!HeapTupleIsValid(htup))
- elog(ERROR, "initGISTstate: index %u not found",
- RelationGetRelid(index));
- giststate->haskeytype = itupform->indhaskeytype;
- if (giststate->haskeytype)
+ 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++)
{
- /* key type is different -- is it byval? */
- htup = SearchSysCacheTuple(ATTNUM,
- ObjectIdGetDatum(itupform->indexrelid),
- UInt16GetDatum(FirstOffsetNumber),
- 0, 0);
- if (!HeapTupleIsValid(htup))
- {
- elog(ERROR, "initGISTstate: no attribute tuple %u %d",
- itupform->indexrelid, FirstOffsetNumber);
- return;
- }
- giststate->keytypbyval = (((Form_pg_attribute) htup)->attbyval);
+ 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);
}
- else
- giststate->keytypbyval = FALSE;
- return;
}
+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
+** 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)
{
- char *datum = (((char *) t) + sizeof(IndexTupleData));
+ bool IsNull;
+ Datum datum = index_getattr(t, 1, r->rd_att, &IsNull);
- /* if new entry fits in index tuple, copy it in */
- if ((Size) entry.bytes < IndexTupleSize(t) - sizeof(IndexTupleData))
+ /*
+ * 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(datum, entry.pred, entry.bytes);
+ memcpy(DatumGetPointer(datum),
+ DatumGetPointer(entry.key),
+ entry.bytes);
/* clear out old size */
- t->t_info &= 0xe000;
+ t->t_info &= ~INDEX_SIZE_MASK;
/* or in new size */
t->t_info |= MAXALIGN(entry.bytes + sizeof(IndexTupleData));
/* generate a new index tuple for the compressed entry */
TupleDesc tupDesc = r->rd_att;
IndexTuple newtup;
- char *isnull;
- int blank;
+ char isnull;
- isnull = (char *) palloc(r->rd_rel->relnatts);
- for (blank = 0; blank < r->rd_rel->relnatts; blank++)
- isnull[blank] = ' ';
+ isnull = DatumGetPointer(entry.key) != NULL ? ' ' : 'n';
newtup = (IndexTuple) index_formtuple(tupDesc,
- (Datum *) &(entry.pred),
- isnull);
+ &(entry.key),
+ &isnull);
newtup->t_tid = t->t_tid;
- pfree(isnull);
return newtup;
}
}
-
+#endif
/*
-** initialize a GiST entry with a decompressed version of pred
+** initialize a GiST entry with a decompressed version of key
*/
void
-gistdentryinit(GISTSTATE *giststate, GISTENTRY *e, char *pr, Relation r,
- Page pg, OffsetNumber o, int b, bool l)
+gistdentryinit(GISTSTATE *giststate, int nkey, GISTENTRY *e,
+ Datum k, Relation r, Page pg, OffsetNumber o,
+ int b, bool l, bool isNull)
{
- GISTENTRY *dep;
-
- gistentryinit(*e, pr, r, pg, o, b, l);
- if (giststate->haskeytype)
+ if (b && !isNull)
{
+ GISTENTRY *dep;
+
+ gistentryinit(*e, k, r, pg, o, b, l);
dep = (GISTENTRY *)
- DatumGetPointer(FunctionCall1(&giststate->decompressFn,
+ DatumGetPointer(FunctionCall1(&giststate->decompressFn[nkey],
PointerGetDatum(e)));
- gistentryinit(*e, dep->pred, dep->rel, dep->page, dep->offset, dep->bytes,
- dep->leafkey);
+ /* 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 pred
+** initialize a GiST entry with a compressed version of key
*/
static void
-gistcentryinit(GISTSTATE *giststate, GISTENTRY *e, char *pr, Relation r,
- Page pg, OffsetNumber o, int b, bool l)
+gistcentryinit(GISTSTATE *giststate, int nkey,
+ GISTENTRY *e, Datum k, Relation r,
+ Page pg, OffsetNumber o, int b, bool l, bool isNull)
{
- GISTENTRY *cep;
-
- gistentryinit(*e, pr, r, pg, o, b, l);
- if (giststate->haskeytype)
+ if (!isNull)
{
+ GISTENTRY *cep;
+
+ gistentryinit(*e, k, r, pg, o, b, l);
cep = (GISTENTRY *)
- DatumGetPointer(FunctionCall1(&giststate->compressFn,
+ DatumGetPointer(FunctionCall1(&giststate->compressFn[nkey],
PointerGetDatum(e)));
- gistentryinit(*e, cep->pred, cep->rel, cep->page, cep->offset, cep->bytes,
- cep->leafkey);
+ /* 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, ¢ry[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]));
-#ifdef GISTDEBUG
+ return tup;
+}
-/*
-** sloppy debugging support routine, requires recompilation with appropriate
-** "out" method for the index keys. Could be fixed to find that info
-** in the catalogs...
-*/
-void
-_gistdump(Relation r)
+static void
+gistDeCompressAtt(GISTSTATE *giststate, Relation r, IndexTuple tuple, Page p,
+ OffsetNumber o, GISTENTRY attdata[], bool decompvec[], bool isnull[])
{
- Buffer buf;
- Page page;
- OffsetNumber offnum,
- maxoff;
- BlockNumber blkno;
- BlockNumber nblocks;
- GISTPageOpaque po;
- IndexTuple itup;
- BlockNumber itblkno;
- OffsetNumber itoffno;
- char *datum;
- char *itkey;
+ int i;
+ Datum datum;
- nblocks = RelationGetNumberOfBlocks(r);
- for (blkno = 0; blkno < nblocks; blkno++)
+ for (i = 0; i < r->rd_att->natts; i++)
{
- buf = ReadBuffer(r, blkno);
- page = BufferGetPage(buf);
- po = (GISTPageOpaque) PageGetSpecialPointer(page);
- maxoff = PageGetMaxOffsetNumber(page);
- printf("Page %d maxoff %d <%s>\n", blkno, maxoff,
- (po->flags & F_LEAF ? "LEAF" : "INTERNAL"));
-
- if (PageIsEmpty(page))
+ 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
{
- ReleaseBuffer(buf);
- continue;
+ if (attdata[i].key == datum || isnull[i])
+ decompvec[i] = FALSE;
+ else
+ decompvec[i] = TRUE;
}
+ }
+}
- for (offnum = FirstOffsetNumber;
- offnum <= maxoff;
- offnum = OffsetNumberNext(offnum))
- {
- itup = (IndexTuple) PageGetItem(page, PageGetItemId(page, offnum));
- itblkno = ItemPointerGetBlockNumber(&(itup->t_tid));
- itoffno = ItemPointerGetOffsetNumber(&(itup->t_tid));
- datum = ((char *) itup);
- datum += sizeof(IndexTupleData);
- /* get out function for type of key, and out it! */
- itkey = (char *) int_range_out((INTRANGE *) datum);
- /* itkey = " unable to print"; */
- printf("\t[%d] size %d heap <%d,%d> key:%s\n",
- offnum, IndexTupleSize(itup), itblkno, itoffno, itkey);
- pfree(itkey);
- }
+static void
+gistFreeAtt(Relation r, GISTENTRY attdata[], bool decompvec[])
+{
+ int i;
- ReleaseBuffer(buf);
- }
+ 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));
}
-static char *
-int_range_out(INTRANGE *r)
+#ifdef GISTDEBUG
+static void
+gist_dumptree(Relation r, int level, BlockNumber blk, OffsetNumber coff)
{
- char *result;
+ 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));
- if (r == NULL)
- return NULL;
- result = (char *) palloc(80);
- snprintf(result, 80, "[%d,%d): %d", r->lower, r->upper, r->flag);
+ 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");
+}
- return result;
+void
+gist_undo(XLogRecPtr lsn, XLogRecord *record)
+{
+ elog(PANIC, "gist_undo: unimplemented");
}
-#endif /* defined GISTDEBUG */
+void
+gist_desc(char *buf, uint8 xl_info, char *rec)
+{
+}
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