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First steps towards index scans with heap access decoupled from index

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access: define new index access method functions 'amgetmulti' that can
fetch multiple TIDs per call.  (The functions exist but are totally
untested as yet.)  Since I was modifying pg_am anyway, remove the
no-longer-needed 'rel' parameter from amcostestimate functions, and
also remove the vestigial amowner column that was creating useless
work for Alvaro's shared-object-dependencies project.
Initdb forced due to changes in pg_am.
This commit is contained in:
Tom Lane
2005-03-27 23:53:05 +00:00
parent 351519affc
commit bf3dbb5881
20 changed files with 535 additions and 174 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
src/include/access/genam.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/genam.h,v 1.48 2005/03/21 01:24:04 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/genam.h,v 1.49 2005/03/27 23:53:04 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -82,6 +82,9 @@ extern IndexScanDesc index_beginscan(Relation heapRelation,
Relation indexRelation,
Snapshot snapshot,
int nkeys, ScanKey key);
extern IndexScanDesc index_beginscan_multi(Relation indexRelation,
Snapshot snapshot,
int nkeys, ScanKey key);
extern void index_rescan(IndexScanDesc scan, ScanKey key);
extern void index_endscan(IndexScanDesc scan);
extern void index_markpos(IndexScanDesc scan);
@@ -89,6 +92,9 @@ extern void index_restrpos(IndexScanDesc scan);
extern HeapTuple index_getnext(IndexScanDesc scan, ScanDirection direction);
extern bool index_getnext_indexitem(IndexScanDesc scan,
ScanDirection direction);
extern bool index_getmulti(IndexScanDesc scan,
ItemPointer tids, int32 max_tids,
int32 *returned_tids);
extern IndexBulkDeleteResult *index_bulk_delete(Relation indexRelation,
IndexBulkDeleteCallback callback,

3
src/include/access/gist.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/gist.h,v 1.43 2004/12/31 22:03:21 pgsql Exp $
* $PostgreSQL: pgsql/src/include/access/gist.h,v 1.44 2005/03/27 23:53:04 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -196,5 +196,6 @@ extern void gist_desc(char *buf, uint8 xl_info, char *rec);
/* gistget.c */
extern Datum gistgettuple(PG_FUNCTION_ARGS);
extern Datum gistgetmulti(PG_FUNCTION_ARGS);
#endif /* GIST_H */

5
src/include/access/hash.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/hash.h,v 1.60 2005/03/21 01:24:04 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/hash.h,v 1.61 2005/03/27 23:53:04 tgl Exp $
*
* NOTES
* modeled after Margo Seltzer's hash implementation for unix.
@@ -232,8 +232,9 @@ typedef HashItemData *HashItem;
extern Datum hashbuild(PG_FUNCTION_ARGS);
extern Datum hashinsert(PG_FUNCTION_ARGS);
extern Datum hashgettuple(PG_FUNCTION_ARGS);
extern Datum hashbeginscan(PG_FUNCTION_ARGS);
extern Datum hashgettuple(PG_FUNCTION_ARGS);
extern Datum hashgetmulti(PG_FUNCTION_ARGS);
extern Datum hashrescan(PG_FUNCTION_ARGS);
extern Datum hashendscan(PG_FUNCTION_ARGS);
extern Datum hashmarkpos(PG_FUNCTION_ARGS);

5
src/include/access/nbtree.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/nbtree.h,v 1.84 2005/03/21 01:24:04 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/nbtree.h,v 1.85 2005/03/27 23:53:04 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -404,8 +404,9 @@ typedef BTScanOpaqueData *BTScanOpaque;
*/
extern Datum btbuild(PG_FUNCTION_ARGS);
extern Datum btinsert(PG_FUNCTION_ARGS);
extern Datum btgettuple(PG_FUNCTION_ARGS);
extern Datum btbeginscan(PG_FUNCTION_ARGS);
extern Datum btgettuple(PG_FUNCTION_ARGS);
extern Datum btgetmulti(PG_FUNCTION_ARGS);
extern Datum btrescan(PG_FUNCTION_ARGS);
extern Datum btendscan(PG_FUNCTION_ARGS);
extern Datum btmarkpos(PG_FUNCTION_ARGS);

10
src/include/access/relscan.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/relscan.h,v 1.37 2004/12/31 22:03:21 pgsql Exp $
* $PostgreSQL: pgsql/src/include/access/relscan.h,v 1.38 2005/03/27 23:53:04 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -38,7 +38,12 @@ typedef struct HeapScanDescData
typedef HeapScanDescData *HeapScanDesc;
/*
* We use the same IndexScanDescData structure for both amgettuple-based
* and amgetmulti-based index scans. Which one is being used can be told
* by looking at fn_getnext and fn_getmulti, only one of which will be
* initialized. Some fields are only relevant in amgettuple-based scans.
*/
typedef struct IndexScanDescData
{
/* scan parameters */
@@ -71,6 +76,7 @@ typedef struct IndexScanDescData
/* NB: if xs_cbuf is not InvalidBuffer, we hold a pin on that buffer */
FmgrInfo fn_getnext; /* cached lookup info for AM's getnext fn */
FmgrInfo fn_getmulti; /* cached lookup info for AM's getmulti fn */
/*
* If keys_are_unique and got_tuple are both true, we stop calling the

7
src/include/access/rtree.h
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@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/rtree.h,v 1.37 2005/01/18 23:25:55 neilc Exp $
* $PostgreSQL: pgsql/src/include/access/rtree.h,v 1.38 2005/03/27 23:53:04 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -116,10 +116,9 @@ extern void freestack(RTSTACK *s);
*/
extern Datum rtinsert(PG_FUNCTION_ARGS);
extern Datum rtbulkdelete(PG_FUNCTION_ARGS);
extern Datum rtgettuple(PG_FUNCTION_ARGS);
extern Datum rtbeginscan(PG_FUNCTION_ARGS);
extern Datum rtgettuple(PG_FUNCTION_ARGS);
extern Datum rtgetmulti(PG_FUNCTION_ARGS);
extern Datum rtendscan(PG_FUNCTION_ARGS);
extern Datum rtmarkpos(PG_FUNCTION_ARGS);
extern Datum rtrestrpos(PG_FUNCTION_ARGS);