64 lines
2.5 KiB
C
64 lines
2.5 KiB
C
/* -------------------------------------------------------------------------
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*
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* predicate.h
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* POSTGRES public predicate locking definitions.
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*
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*
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* Portions Copyright (c) 1996-2012, 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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* src/include/storage/predicate.h
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*
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* -------------------------------------------------------------------------
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*/
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#ifndef PREDICATE_H
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#define PREDICATE_H
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#include "utils/relcache.h"
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#include "utils/snapshot.h"
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/* Number of SLRU buffers to use for predicate locking */
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#define NUM_OLDSERXID_BUFFERS 16
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/*
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* function prototypes
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*/
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/* housekeeping for shared memory predicate lock structures */
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extern void InitPredicateLocks(void);
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extern Size PredicateLockShmemSize(void);
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extern void CheckPointPredicate(void);
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/* predicate lock reporting */
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extern bool PageIsPredicateLocked(Relation relation, BlockNumber blkno);
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/* predicate lock maintenance */
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extern Snapshot GetSerializableTransactionSnapshot(Snapshot snapshot);
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extern void SetSerializableTransactionSnapshot(Snapshot snapshot, TransactionId sourcexid);
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extern void RegisterPredicateLockingXid(TransactionId xid);
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extern void PredicateLockRelation(Relation relation, Snapshot snapshot);
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extern void PredicateLockPage(Relation relation, BlockNumber blkno, Snapshot snapshot);
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extern void PredicateLockTuple(Relation relation, HeapTuple tuple, Snapshot snapshot);
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extern void PredicateLockPageSplit(Relation relation, BlockNumber oldblkno, BlockNumber newblkno);
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extern void PredicateLockPageCombine(Relation relation, BlockNumber oldblkno, BlockNumber newblkno);
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extern void TransferPredicateLocksToHeapRelation(Relation relation);
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extern void ReleasePredicateLocks(bool isCommit);
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/* conflict detection (may also trigger rollback) */
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extern void CheckForSerializableConflictOut(
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bool valid, Relation relation, HeapTuple tuple, Buffer buffer, Snapshot snapshot);
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extern void CheckForSerializableConflictIn(Relation relation, HeapTuple tuple, Buffer buffer);
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extern void CheckTableForSerializableConflictIn(Relation relation);
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/* final rollback checking */
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extern void PreCommit_CheckForSerializationFailure(void);
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/* two-phase commit support */
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extern void AtPrepare_PredicateLocks(void);
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extern void PostPrepare_PredicateLocks(TransactionId xid);
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extern void PredicateLockTwoPhaseFinish(TransactionId xid, bool isCommit);
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extern void predicatelock_twophase_recover(TransactionId xid, uint16 info, void* recdata, uint32 len);
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#endif /* PREDICATE_H */
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