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📄 aclchk_internal.h(1.42 KB)
📄 array.h(18.84 KB)
📄 arrayaccess.h(2.97 KB)
📄 ascii.h(579 B)
📄 attoptcache.h(725 B)
📄 builtins.h(56.08 KB)
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📄 cash.h(2.07 KB)
📄 catcache.h(7.4 KB)
📄 combocid.h(870 B)
📄 date.h(7.77 KB)
📄 datetime.h(10.59 KB)
📄 datum.h(1.88 KB)
📄 dynahash.h(498 B)
📄 dynamic_loader.h(648 B)
📄 elog.h(14.74 KB)
📄 errcodes.h(20.1 KB)
📄 evtcache.h(934 B)
📄 expandeddatum.h(6.89 KB)
📄 fmgroids.h(72.24 KB)
📄 fmgrtab.h(1.15 KB)
📄 formatting.h(1.41 KB)
📄 geo_decls.h(16.22 KB)
📄 guc.h(15.6 KB)
📄 guc_tables.h(7.22 KB)
📄 help_config.h(457 B)
📄 hsearch.h(5.97 KB)
📄 index_selfuncs.h(2.16 KB)
📄 inet.h(4.6 KB)
📄 int8.h(4.12 KB)
📄 inval.h(1.71 KB)
📄 json.h(3.26 KB)
📄 jsonapi.h(4.19 KB)
📄 jsonb.h(16.13 KB)
📄 logtape.h(1.5 KB)
📄 lsyscache.h(6.91 KB)
📄 memdebug.h(1.25 KB)
📄 memutils.h(6.16 KB)
📄 nabstime.h(5.79 KB)
📄 numeric.h(1.92 KB)
📄 palloc.h(5.04 KB)
📄 pg_crc.h(3.42 KB)
📄 pg_locale.h(2.63 KB)
📄 pg_lsn.h(1.29 KB)
📄 pg_rusage.h(847 B)
📄 plancache.h(8.36 KB)
📄 portal.h(9.64 KB)
📄 probes.h(6.54 KB)
📄 ps_status.h(668 B)
📄 rangetypes.h(8.31 KB)
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📄 relcache.h(3.79 KB)
📄 relfilenodemap.h(561 B)
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📄 resowner.h(2.52 KB)
📄 resowner_private.h(3.42 KB)
📄 rls.h(1.73 KB)
📄 ruleutils.h(1.2 KB)
📄 sampling.h(1.96 KB)
📄 selfuncs.h(9.39 KB)
📄 snapmgr.h(4.13 KB)
📄 snapshot.h(4.2 KB)
📄 sortsupport.h(10.81 KB)
📄 spccache.h(604 B)
📄 syscache.h(5.91 KB)
📄 timeout.h(2.48 KB)
📄 timestamp.h(10.34 KB)
📄 tqual.h(4.11 KB)
📄 tuplesort.h(4.86 KB)
📄 tuplestore.h(3.23 KB)
📄 typcache.h(5.71 KB)
📄 tzparser.h(1.13 KB)
📄 uuid.h(861 B)
📄 varbit.h(4.31 KB)
📄 xml.h(3.89 KB)

Editing: tqual.h

/*-------------------------------------------------------------------------
 *
 * tqual.h
 *	  POSTGRES "time qualification" definitions, ie, tuple visibility rules.
 *
 *	  Should be moved/renamed...    - vadim 07/28/98
 *
 * Portions Copyright (c) 1996-2016, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/utils/tqual.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef TQUAL_H
#define TQUAL_H

#include "utils/snapshot.h"
#include "access/xlogdefs.h"

/* Static variables representing various special snapshot semantics */
extern PGDLLIMPORT SnapshotData SnapshotSelfData;
extern PGDLLIMPORT SnapshotData SnapshotAnyData;
extern PGDLLIMPORT SnapshotData CatalogSnapshotData;

#define SnapshotSelf		(&SnapshotSelfData)
#define SnapshotAny			(&SnapshotAnyData)

/* This macro encodes the knowledge of which snapshots are MVCC-safe */
#define IsMVCCSnapshot(snapshot)  \
	((snapshot)->satisfies == HeapTupleSatisfiesMVCC || \
	 (snapshot)->satisfies == HeapTupleSatisfiesHistoricMVCC)

/*
 * HeapTupleSatisfiesVisibility
 *		True iff heap tuple satisfies a time qual.
 *
 * Notes:
 *	Assumes heap tuple is valid.
 *	Beware of multiple evaluations of snapshot argument.
 *	Hint bits in the HeapTuple's t_infomask may be updated as a side effect;
 *	if so, the indicated buffer is marked dirty.
 */
#define HeapTupleSatisfiesVisibility(tuple, snapshot, buffer) \
	((*(snapshot)->satisfies) (tuple, snapshot, buffer))

/* Result codes for HeapTupleSatisfiesVacuum */
typedef enum
{
	HEAPTUPLE_DEAD,				/* tuple is dead and deletable */
	HEAPTUPLE_LIVE,				/* tuple is live (committed, no deleter) */
	HEAPTUPLE_RECENTLY_DEAD,	/* tuple is dead, but not deletable yet */
	HEAPTUPLE_INSERT_IN_PROGRESS,		/* inserting xact is still in progress */
	HEAPTUPLE_DELETE_IN_PROGRESS	/* deleting xact is still in progress */
} HTSV_Result;

/* These are the "satisfies" test routines for the various snapshot types */
extern bool HeapTupleSatisfiesMVCC(HeapTuple htup,
					   Snapshot snapshot, Buffer buffer);
extern bool HeapTupleSatisfiesSelf(HeapTuple htup,
					   Snapshot snapshot, Buffer buffer);
extern bool HeapTupleSatisfiesAny(HeapTuple htup,
					  Snapshot snapshot, Buffer buffer);
extern bool HeapTupleSatisfiesToast(HeapTuple htup,
						Snapshot snapshot, Buffer buffer);
extern bool HeapTupleSatisfiesDirty(HeapTuple htup,
						Snapshot snapshot, Buffer buffer);
extern bool HeapTupleSatisfiesHistoricMVCC(HeapTuple htup,
							   Snapshot snapshot, Buffer buffer);

/* Special "satisfies" routines with different APIs */
extern HTSU_Result HeapTupleSatisfiesUpdate(HeapTuple htup,
						 CommandId curcid, Buffer buffer);
extern HTSV_Result HeapTupleSatisfiesVacuum(HeapTuple htup,
						 TransactionId OldestXmin, Buffer buffer);
extern bool HeapTupleIsSurelyDead(HeapTuple htup,
					  TransactionId OldestXmin);
extern bool XidInMVCCSnapshot(TransactionId xid, Snapshot snapshot);

extern void HeapTupleSetHintBits(HeapTupleHeader tuple, Buffer buffer,
					 uint16 infomask, TransactionId xid);
extern bool HeapTupleHeaderIsOnlyLocked(HeapTupleHeader tuple);

/*
 * To avoid leaking too much knowledge about reorderbuffer implementation
 * details this is implemented in reorderbuffer.c not tqual.c.
 */
struct HTAB;
extern bool ResolveCminCmaxDuringDecoding(struct HTAB *tuplecid_data,
							  Snapshot snapshot,
							  HeapTuple htup,
							  Buffer buffer,
							  CommandId *cmin, CommandId *cmax);

/*
 * We don't provide a static SnapshotDirty variable because it would be
 * non-reentrant.  Instead, users of that snapshot type should declare a
 * local variable of type SnapshotData, and initialize it with this macro.
 */
#define InitDirtySnapshot(snapshotdata)  \
	((snapshotdata).satisfies = HeapTupleSatisfiesDirty)

/*
 * Similarly, some initialization is required for SnapshotToast.  We need
 * to set lsn and whenTaken correctly to support snapshot_too_old.
 */
#define InitToastSnapshot(snapshotdata, l, w)  \
	((snapshotdata).satisfies = HeapTupleSatisfiesToast, \
	 (snapshotdata).lsn = (l),					\
	 (snapshotdata).whenTaken = (w))

#endif   /* TQUAL_H */

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Editing: tqual.h

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