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/*-------------------------------------------------------------------------
*
* genam.h
* POSTGRES general 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 1.26 2001/07/15 22:48:18 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef GENAM_H
#define GENAM_H
#include "access/itup.h"
#include "access/relscan.h"
#include "access/sdir.h"
/* Struct for statistics returned by bulk-delete operation */
typedef struct IndexBulkDeleteResult
{
BlockNumber num_pages; /* pages remaining in index */
double tuples_removed; /* # removed by bulk-delete operation */
double num_index_tuples; /* # remaining */
} IndexBulkDeleteResult;
/* Typedef for callback function to determine if a tuple is bulk-deletable */
typedef bool (*IndexBulkDeleteCallback) (ItemPointer itemptr, void *state);
/* ----------------
* generalized index_ interface routines (in indexam.c)
* ----------------
*/
extern Relation index_open(Oid relationId);
extern Relation index_openr(char *relationName);
extern void index_close(Relation relation);
extern InsertIndexResult index_insert(Relation relation,
Datum *datum, 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);
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,
IndexBulkDeleteCallback callback,
void *callback_state);
extern RegProcedure index_cost_estimator(Relation relation);
extern RegProcedure index_getprocid(Relation irel, AttrNumber attnum,
uint16 procnum);
/* in genam.c */
extern IndexScanDesc RelationGetIndexScan(Relation relation, bool scanFromEnd,
uint16 numberOfKeys, ScanKey key);
extern void IndexScanEnd(IndexScanDesc scan);
#endif /* GENAM_H */
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