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heapam.h
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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 */