database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-10-27 00:12:01 +03:00
Code Activity

Restructure indexscan API (index_beginscan, index_getnext) per

Browse Source 
yesterday's proposal to pghackers.  Also remove unnecessary parameters
to heap_beginscan, heap_rescan.  I modified pg_proc.h to reflect the
new numbers of parameters for the AM interface routines, but did not
force an initdb because nothing actually looks at those fields.
This commit is contained in:
Tom Lane
2002-05-20 23:51:44 +00:00
parent c961474c96
commit 44fbe20d62
59 changed files with 834 additions and 1283 deletions
Download Patch File Download Diff File Expand all files Collapse all files

40
src/include/access/genam.h
View File

@@ -1,13 +1,13 @@
/*-------------------------------------------------------------------------
*
* genam.h
* POSTGRES general access method definitions.
* POSTGRES generalized index access method definitions.
*
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: genam.h,v 1.33 2002/03/26 19:16:17 tgl Exp $
* $Id: genam.h,v 1.34 2002/05/20 23:51:43 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -36,12 +36,9 @@ typedef bool (*IndexBulkDeleteCallback) (ItemPointer itemptr, void *state);
typedef struct SysScanDescData
{
Relation heap_rel; /* catalog being scanned */
Snapshot snapshot; /* time qual (normally SnapshotNow) */
Relation irel; /* NULL if doing heap scan */
HeapScanDesc scan; /* only valid in heap-scan case */
IndexScanDesc iscan; /* only valid in index-scan case */
HeapTupleData tuple; /* workspace for indexscan */
Buffer buffer; /* working state for indexscan */
} SysScanDescData;
typedef SysScanDescData *SysScanDesc;
@@ -54,22 +51,27 @@ extern Relation index_open(Oid relationId);
extern Relation index_openrv(const RangeVar *relation);
extern Relation index_openr(const char *sysRelationName);
extern void index_close(Relation relation);
extern InsertIndexResult index_insert(Relation relation,
Datum *datum, char *nulls,
extern InsertIndexResult index_insert(Relation indexRelation,
Datum *datums, char *nulls,
ItemPointer heap_t_ctid,
Relation heapRel);
extern IndexScanDesc index_beginscan(Relation relation, bool scanFromEnd,
uint16 numberOfKeys, ScanKey key);
extern void index_rescan(IndexScanDesc scan, bool scanFromEnd, ScanKey key);
Relation heapRelation);
extern IndexScanDesc index_beginscan(Relation heapRelation,
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);
extern void index_restrpos(IndexScanDesc scan);
extern RetrieveIndexResult index_getnext(IndexScanDesc scan,
ScanDirection direction);
extern IndexBulkDeleteResult *index_bulk_delete(Relation relation,
extern HeapTuple index_getnext(IndexScanDesc scan, ScanDirection direction);
extern bool index_getnext_indexitem(IndexScanDesc scan,
ScanDirection direction);
extern IndexBulkDeleteResult *index_bulk_delete(Relation indexRelation,
IndexBulkDeleteCallback callback,
void *callback_state);
extern RegProcedure index_cost_estimator(Relation relation);
extern RegProcedure index_cost_estimator(Relation indexRelation);
extern RegProcedure index_getprocid(Relation irel, AttrNumber attnum,
uint16 procnum);
extern struct FmgrInfo *index_getprocinfo(Relation irel, AttrNumber attnum,
@@ -78,18 +80,18 @@ extern struct FmgrInfo *index_getprocinfo(Relation irel, AttrNumber attnum,
/*
* index access method support routines (in genam.c)
*/
extern IndexScanDesc RelationGetIndexScan(Relation relation, bool scanFromEnd,
uint16 numberOfKeys, ScanKey key);
extern IndexScanDesc RelationGetIndexScan(Relation indexRelation,
int nkeys, ScanKey key);
extern void IndexScanEnd(IndexScanDesc scan);
/*
* heap-or-index access to system catalogs (in genam.c)
*/
extern SysScanDesc systable_beginscan(Relation rel,
extern SysScanDesc systable_beginscan(Relation heapRelation,
const char *indexRelname,
bool indexOK,
Snapshot snapshot,
unsigned nkeys, ScanKey key);
int nkeys, ScanKey key);
extern HeapTuple systable_getnext(SysScanDesc sysscan);
extern void systable_endscan(SysScanDesc sysscan);