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* new split algorithm (as proposed in http://archives.postgresql.org/pgsql-hackers/2006-06/msg00254.php)
  * possible call pickSplit() for second and below columns
  * add spl_(l|r)datum_exists to GIST_SPLITVEC -
    pickSplit should check its values to use already defined
    spl_(l|r)datum for splitting. pickSplit should set
    spl_(l|r)datum_exists to 'false' (if they was 'true') to
    signal to caller about using spl_(l|r)datum.
  * support for old pickSplit(): not very optimal
    but correct split
* remove 'bytes' field from GISTENTRY: in any case size of
  value is defined by it's type.
* split GIST_SPLITVEC to two structures: one for using in picksplit
  and second - for internal use.
* some code refactoring
* support of subsplit to rtree opclasses

TODO: add support of subsplit to contrib modules
This commit is contained in:
Teodor Sigaev
2006-06-28 12:00:14 +00:00
parent a1dc5c60bc
commit 1f7ef548ec
23 changed files with 266 additions and 645 deletions
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67
src/include/access/gist_private.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2006, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/gist_private.h,v 1.17 2006/05/29 12:50:06 teodor Exp $
* $PostgreSQL: pgsql/src/include/access/gist_private.h,v 1.18 2006/06/28 12:00:14 teodor Exp $
*
*-------------------------------------------------------------------------
*/
@ -180,6 +180,21 @@ typedef struct GISTInsertStack
struct GISTInsertStack *next;
} GISTInsertStack;
typedef struct GistSplitVector {
GIST_SPLITVEC splitVector; /* to/from PickSplit method */
Datum spl_lattr[INDEX_MAX_KEYS]; /* Union of subkeys in spl_left */
bool spl_lisnull[INDEX_MAX_KEYS];
bool spl_leftvalid;
Datum spl_rattr[INDEX_MAX_KEYS]; /* Union of subkeys in spl_right */
bool spl_risnull[INDEX_MAX_KEYS];
bool spl_rightvalid;
bool *spl_equiv; /* equivalent tuples which can be freely
* distributed between left and right pages */
} GistSplitVector;
#define XLogRecPtrIsInvalid( r ) ( (r).xlogid == 0 && (r).xrecoff == 0 )
typedef struct
@ -206,12 +221,6 @@ typedef struct
/* root page of a gist index */
#define GIST_ROOT_BLKNO 0
#define ATTSIZE(datum, tupdesc, i, isnull) \
( \
(isnull) ? 0 : \
att_addlength(0, (tupdesc)->attrs[(i)-1]->attlen, (datum)) \
)
/*
* mark tuples on inner pages during recovery
*/
@ -281,7 +290,7 @@ extern IndexTuple gistgetadjusted(Relation r,
IndexTuple addtup,
GISTSTATE *giststate);
extern IndexTuple gistFormTuple(GISTSTATE *giststate,
Relation r, Datum *attdata, int *datumsize, bool *isnull);
Relation r, Datum *attdata, bool *isnull, bool newValues);
extern OffsetNumber gistchoose(Relation r, Page p,
IndexTuple it,
@ -289,34 +298,34 @@ extern OffsetNumber gistchoose(Relation r, Page p,
extern void gistcentryinit(GISTSTATE *giststate, int nkey,
GISTENTRY *e, Datum k,
Relation r, Page pg,
OffsetNumber o, int b, bool l, bool isNull);
extern void gistDeCompressAtt(GISTSTATE *giststate, Relation r,
IndexTuple tuple, Page p, OffsetNumber o,
GISTENTRY *attdata, bool *isnull);
typedef struct {
int *attrsize;
Datum *attr;
int len;
OffsetNumber *entries;
bool *isnull;
int *idgrp;
} GistSplitVec;
extern void gistunionsubkeyvec(GISTSTATE *giststate,
IndexTuple *itvec, GistSplitVec *gsvp, int startkey);
extern void gistunionsubkey(GISTSTATE *giststate, IndexTuple *itvec,
GIST_SPLITVEC *spl, int attno);
OffsetNumber o, bool l, bool isNull);
extern void GISTInitBuffer(Buffer b, uint32 f);
extern void gistdentryinit(GISTSTATE *giststate, int nkey, GISTENTRY *e,
Datum k, Relation r, Page pg, OffsetNumber o,
int b, bool l, bool isNull);
bool gistUserPicksplit(Relation r, GistEntryVector *entryvec, int attno, GIST_SPLITVEC *v,
IndexTuple *itup, int len, GISTSTATE *giststate);
bool l, bool isNull);
extern float gistpenalty(GISTSTATE *giststate, int attno,
GISTENTRY *key1, bool isNull1,
GISTENTRY *key2, bool isNull2);
extern bool gistMakeUnionItVec(GISTSTATE *giststate, IndexTuple *itvec, int len, int startkey,
Datum *attr, bool *isnull );
extern bool gistKeyIsEQ(GISTSTATE *giststate, int attno, Datum a, Datum b);
extern void gistDeCompressAtt(GISTSTATE *giststate, Relation r, IndexTuple tuple, Page p,
OffsetNumber o, GISTENTRY *attdata, bool *isnull);
extern void gistMakeUnionKey( GISTSTATE *giststate, int attno,
GISTENTRY *entry1, bool isnull1,
GISTENTRY *entry2, bool isnull2,
Datum *dst, bool *dstisnull );
/* gistvacuum.c */
extern Datum gistbulkdelete(PG_FUNCTION_ARGS);
extern Datum gistvacuumcleanup(PG_FUNCTION_ARGS);
/* gistsplit.c */
extern void gistSplitByKey(Relation r, Page page, IndexTuple *itup,
int len, GISTSTATE *giststate,
GistSplitVector *v, GistEntryVector *entryvec,
int attno);
#endif /* GIST_PRIVATE_H */