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/*-------------------------------------------------------------------------
*
* heapam.h
* POSTGRES heap access method definitions.
*
*
* Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/access/heapam.h
*
*-------------------------------------------------------------------------
*/
#ifndef HEAPAM_H
#define HEAPAM_H
#include "access/sdir.h"
#include "access/skey.h"
#include "access/xlog.h"
#include "nodes/primnodes.h"
#include "storage/lock.h"
#include "utils/relcache.h"
#include "utils/snapshot.h"
/* "options" flag bits for heap_insert */
#define HEAP_INSERT_SKIP_WAL 0x0001
#define HEAP_INSERT_SKIP_FSM 0x0002
typedef struct BulkInsertStateData *BulkInsertState;
typedef enum
{
LockTupleShared,
LockTupleExclusive
} LockTupleMode;
/* ----------------
* function prototypes for heap access method
*
* heap_create, heap_create_with_catalog, and heap_drop_with_catalog
* are declared in catalog/heap.h
* ----------------
*/
/* in heap/heapam.c */
extern Relation relation_open(Oid relationId, LOCKMODE lockmode);
extern Relation try_relation_open(Oid relationId, LOCKMODE lockmode);
extern Relation relation_openrv(const RangeVar *relation, LOCKMODE lockmode);
extern Relation relation_openrv_extended(const RangeVar *relation,
LOCKMODE lockmode, bool missing_ok);
extern void relation_close(Relation relation, LOCKMODE lockmode);
extern Relation heap_open(Oid relationId, LOCKMODE lockmode);
extern Relation heap_openrv(const RangeVar *relation, LOCKMODE lockmode);
extern Relation heap_openrv_extended(const RangeVar *relation,
LOCKMODE lockmode, bool missing_ok);
#define heap_close(r,l) relation_close(r,l)
/* struct definition appears in relscan.h */
typedef struct HeapScanDescData *HeapScanDesc;
/*
* HeapScanIsValid
* True iff the heap scan is valid.
*/
#define HeapScanIsValid(scan) PointerIsValid(scan)
extern HeapScanDesc heap_beginscan(Relation relation, Snapshot snapshot,
int nkeys, ScanKey key);
extern HeapScanDesc heap_beginscan_strat(Relation relation, Snapshot snapshot,
int nkeys, ScanKey key,
bool allow_strat, bool allow_sync);
extern HeapScanDesc heap_beginscan_bm(Relation relation, Snapshot snapshot,
int nkeys, ScanKey key);
extern void heap_rescan(HeapScanDesc scan, ScanKey key);
extern void heap_endscan(HeapScanDesc scan);
extern HeapTuple heap_getnext(HeapScanDesc scan, ScanDirection direction);
extern bool heap_fetch(Relation relation, Snapshot snapshot,
HeapTuple tuple, Buffer *userbuf, bool keep_buf,
Relation stats_relation);
extern bool heap_hot_search_buffer(ItemPointer tid, Relation relation,
Buffer buffer, Snapshot snapshot, HeapTuple heapTuple,
bool *all_dead, bool first_call);
extern bool heap_hot_search(ItemPointer tid, Relation relation,
Snapshot snapshot, bool *all_dead);
extern void heap_get_latest_tid(Relation relation, Snapshot snapshot,
ItemPointer tid);
extern void setLastTid(const ItemPointer tid);
extern BulkInsertState GetBulkInsertState(void);
extern void FreeBulkInsertState(BulkInsertState);
extern Oid heap_insert(Relation relation, HeapTuple tup, CommandId cid,
int options, BulkInsertState bistate);
extern void heap_multi_insert(Relation relation, HeapTuple *tuples, int ntuples,
CommandId cid, int options, BulkInsertState bistate);
extern HTSU_Result heap_delete(Relation relation, ItemPointer tid,
ItemPointer ctid, TransactionId *update_xmax,
CommandId cid, Snapshot crosscheck, bool wait);
extern HTSU_Result heap_update(Relation relation, ItemPointer otid,
HeapTuple newtup,
ItemPointer ctid, TransactionId *update_xmax,
CommandId cid, Snapshot crosscheck, bool wait);
extern HTSU_Result heap_lock_tuple(Relation relation, HeapTuple tuple,
Buffer *buffer, ItemPointer ctid,
TransactionId *update_xmax, CommandId cid,
LockTupleMode mode, bool nowait);
extern void heap_inplace_update(Relation relation, HeapTuple tuple);
extern bool heap_freeze_tuple(HeapTupleHeader tuple, TransactionId cutoff_xid);
extern bool heap_tuple_needs_freeze(HeapTupleHeader tuple, TransactionId cutoff_xid,
Buffer buf);
extern Oid simple_heap_insert(Relation relation, HeapTuple tup);
extern void simple_heap_delete(Relation relation, ItemPointer tid);
extern void simple_heap_update(Relation relation, ItemPointer otid,
HeapTuple tup);
extern void heap_markpos(HeapScanDesc scan);
extern void heap_restrpos(HeapScanDesc scan);
extern void heap_sync(Relation relation);
extern void heap_redo(XLogRecPtr lsn, XLogRecord *rptr);
extern void heap_desc(StringInfo buf, uint8 xl_info, char *rec);
extern void heap2_redo(XLogRecPtr lsn, XLogRecord *rptr);
extern void heap2_desc(StringInfo buf, uint8 xl_info, char *rec);
extern XLogRecPtr log_heap_cleanup_info(RelFileNode rnode,
TransactionId latestRemovedXid);
extern XLogRecPtr log_heap_clean(Relation reln, Buffer buffer,
OffsetNumber *redirected, int nredirected,
OffsetNumber *nowdead, int ndead,
OffsetNumber *nowunused, int nunused,
TransactionId latestRemovedXid);
extern XLogRecPtr log_heap_freeze(Relation reln, Buffer buffer,
TransactionId cutoff_xid,
OffsetNumber *offsets, int offcnt);
extern XLogRecPtr log_heap_visible(RelFileNode rnode, BlockNumber block,
Buffer vm_buffer, TransactionId cutoff_xid);
extern XLogRecPtr log_newpage(RelFileNode *rnode, ForkNumber forkNum,
BlockNumber blk, Page page);
extern XLogRecPtr log_newpage_buffer(Buffer buffer);
/* in heap/pruneheap.c */
extern void heap_page_prune_opt(Relation relation, Buffer buffer,
TransactionId OldestXmin);
extern int heap_page_prune(Relation relation, Buffer buffer,
TransactionId OldestXmin,
bool report_stats, TransactionId *latestRemovedXid);
extern void heap_page_prune_execute(Buffer buffer,
OffsetNumber *redirected, int nredirected,
OffsetNumber *nowdead, int ndead,
OffsetNumber *nowunused, int nunused);
extern void heap_get_root_tuples(Page page, OffsetNumber *root_offsets);
/* in heap/syncscan.c */
extern void ss_report_location(Relation rel, BlockNumber location);
extern BlockNumber ss_get_location(Relation rel, BlockNumber relnblocks);
extern void SyncScanShmemInit(void);
extern Size SyncScanShmemSize(void);
#endif /* HEAPAM_H */