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162bd08b3f
indexes. Replace all heap_openr and index_openr calls by heap_open and index_open. Remove runtime lookups of catalog OID numbers in various places. Remove relcache's support for looking up system catalogs by name. Bulky but mostly very boring patch ...
129 lines
4.6 KiB
C
129 lines
4.6 KiB
C
/*-------------------------------------------------------------------------
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*
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* genam.h
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* POSTGRES generalized index access method definitions.
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*
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*
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* Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $PostgreSQL: pgsql/src/include/access/genam.h,v 1.50 2005/04/14 20:03:27 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef GENAM_H
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#define GENAM_H
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#include "access/itup.h"
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#include "access/relscan.h"
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#include "access/sdir.h"
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#include "nodes/primnodes.h"
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/*
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* Struct for statistics returned by bulk-delete operation
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*
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* This is now also passed to the index AM's vacuum-cleanup operation,
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* if it has one, which can modify the results as needed. Note that
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* an index AM could choose to have bulk-delete return a larger struct
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* of which this is just the first field; this provides a way for bulk-delete
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* to communicate additional private data to vacuum-cleanup.
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*
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* Note: pages_removed is the amount by which the index physically shrank,
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* if any (ie the change in its total size on disk). pages_deleted and
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* pages_free refer to free space within the index file.
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*/
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typedef struct IndexBulkDeleteResult
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{
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BlockNumber num_pages; /* pages remaining in index */
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BlockNumber pages_removed; /* # removed by bulk-delete operation */
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double num_index_tuples; /* tuples remaining */
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double tuples_removed; /* # removed by bulk-delete operation */
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BlockNumber pages_deleted; /* # unused pages in index */
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BlockNumber pages_free; /* # pages available for reuse */
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} IndexBulkDeleteResult;
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/* Typedef for callback function to determine if a tuple is bulk-deletable */
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typedef bool (*IndexBulkDeleteCallback) (ItemPointer itemptr, void *state);
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/* Struct for additional arguments passed to vacuum-cleanup operation */
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typedef struct IndexVacuumCleanupInfo
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{
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bool vacuum_full; /* VACUUM FULL (we have exclusive lock) */
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int message_level; /* ereport level for progress messages */
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} IndexVacuumCleanupInfo;
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/* Struct for heap-or-index scans of system tables */
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typedef struct SysScanDescData
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{
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Relation heap_rel; /* catalog being scanned */
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Relation irel; /* NULL if doing heap scan */
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HeapScanDesc scan; /* only valid in heap-scan case */
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IndexScanDesc iscan; /* only valid in index-scan case */
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} SysScanDescData;
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typedef SysScanDescData *SysScanDesc;
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/*
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* generalized index_ interface routines (in indexam.c)
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*/
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extern Relation index_open(Oid relationId);
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extern Relation index_openrv(const RangeVar *relation);
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extern void index_close(Relation relation);
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extern bool index_insert(Relation indexRelation,
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Datum *values, bool *isnull,
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ItemPointer heap_t_ctid,
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Relation heapRelation,
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bool check_uniqueness);
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extern IndexScanDesc index_beginscan(Relation heapRelation,
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Relation indexRelation,
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Snapshot snapshot,
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int nkeys, ScanKey key);
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extern IndexScanDesc index_beginscan_multi(Relation indexRelation,
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Snapshot snapshot,
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int nkeys, ScanKey key);
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extern void index_rescan(IndexScanDesc scan, ScanKey key);
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extern void index_endscan(IndexScanDesc scan);
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extern void index_markpos(IndexScanDesc scan);
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extern void index_restrpos(IndexScanDesc scan);
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extern HeapTuple index_getnext(IndexScanDesc scan, ScanDirection direction);
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extern bool index_getnext_indexitem(IndexScanDesc scan,
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ScanDirection direction);
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extern bool index_getmulti(IndexScanDesc scan,
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ItemPointer tids, int32 max_tids,
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int32 *returned_tids);
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extern IndexBulkDeleteResult *index_bulk_delete(Relation indexRelation,
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IndexBulkDeleteCallback callback,
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void *callback_state);
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extern IndexBulkDeleteResult *index_vacuum_cleanup(Relation indexRelation,
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IndexVacuumCleanupInfo *info,
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IndexBulkDeleteResult *stats);
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extern RegProcedure index_cost_estimator(Relation indexRelation);
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extern RegProcedure index_getprocid(Relation irel, AttrNumber attnum,
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uint16 procnum);
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extern struct FmgrInfo *index_getprocinfo(Relation irel, AttrNumber attnum,
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uint16 procnum);
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/*
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* index access method support routines (in genam.c)
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*/
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extern IndexScanDesc RelationGetIndexScan(Relation indexRelation,
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int nkeys, ScanKey key);
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extern void IndexScanEnd(IndexScanDesc scan);
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/*
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* heap-or-index access to system catalogs (in genam.c)
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*/
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extern SysScanDesc systable_beginscan(Relation heapRelation,
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Oid indexId,
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bool indexOK,
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Snapshot snapshot,
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int nkeys, ScanKey key);
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extern HeapTuple systable_getnext(SysScanDesc sysscan);
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extern void systable_endscan(SysScanDesc sysscan);
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#endif /* GENAM_H */
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