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acl.h	12.79 KB	-rw-r--r--
array.h	10.97 KB	-rw-r--r--
ascii.h	579 B	-rw-r--r--
attoptcache.h	725 B	-rw-r--r--
builtins.h	47.77 KB	-rw-r--r--
bytea.h	1.58 KB	-rw-r--r--
cash.h	2.07 KB	-rw-r--r--
catcache.h	7.51 KB	-rw-r--r--
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date.h	7.73 KB	-rw-r--r--
datetime.h	9.92 KB	-rw-r--r--
datum.h	1.48 KB	-rw-r--r--
dynahash.h	498 B	-rw-r--r--
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elog.h	12.56 KB	-rw-r--r--
errcodes.h	19.61 KB	-rw-r--r--
fmgroids.h	61.09 KB	-rw-r--r--
fmgrtab.h	1.15 KB	-rw-r--r--
formatting.h	1.41 KB	-rw-r--r--
geo_decls.h	15.86 KB	-rw-r--r--
guc.h	13.19 KB	-rw-r--r--
guc_tables.h	7.15 KB	-rw-r--r--
help_config.h	432 B	-rw-r--r--
hsearch.h	5.51 KB	-rw-r--r--
inet.h	2.66 KB	-rw-r--r--
int8.h	4.03 KB	-rw-r--r--
inval.h	1.81 KB	-rw-r--r--
json.h	916 B	-rw-r--r--
logtape.h	1.5 KB	-rw-r--r--
lsyscache.h	6.51 KB	-rw-r--r--
memutils.h	5.2 KB	-rw-r--r--
nabstime.h	5.79 KB	-rw-r--r--
numeric.h	1.88 KB	-rw-r--r--
palloc.h	3.92 KB	-rw-r--r--
pg_crc.h	4.36 KB	-rw-r--r--
pg_crc_tables.h	19.73 KB	-rw-r--r--
pg_locale.h	2.59 KB	-rw-r--r--
pg_lzcompress.h	2.97 KB	-rw-r--r--
pg_rusage.h	847 B	-rw-r--r--
plancache.h	8.02 KB	-rw-r--r--
portal.h	9.22 KB	-rw-r--r--
probes.h	37.93 KB	-rw-r--r--
ps_status.h	668 B	-rw-r--r--
rangetypes.h	7.4 KB	-rw-r--r--
rbtree.h	2.26 KB	-rw-r--r--
rel.h	12.27 KB	-rw-r--r--
relcache.h	3.17 KB	-rw-r--r--
relmapper.h	1.68 KB	-rw-r--r--
reltrigger.h	1.95 KB	-rw-r--r--
resowner.h	5.07 KB	-rw-r--r--
selfuncs.h	7.5 KB	-rw-r--r--
snapmgr.h	1.59 KB	-rw-r--r--
snapshot.h	2.59 KB	-rw-r--r--
sortsupport.h	5.3 KB	-rw-r--r--
spccache.h	556 B	-rw-r--r--
syscache.h	5.51 KB	-rw-r--r--
timestamp.h	9.5 KB	-rw-r--r--
tqual.h	3.5 KB	-rw-r--r--
tuplesort.h	4.62 KB	-rw-r--r--
tuplestore.h	3.14 KB	-rw-r--r--
typcache.h	4.26 KB	-rw-r--r--
tzparser.h	1.13 KB	-rw-r--r--
uuid.h	861 B	-rw-r--r--
varbit.h	4.27 KB	-rw-r--r--
xml.h	3.89 KB	-rw-r--r--

Code Editor : tqual.h

/*-------------------------------------------------------------------------
 *
 * tqual.h
 *	  POSTGRES "time qualification" definitions, ie, tuple visibility rules.
 *
 *	  Should be moved/renamed...    - vadim 07/28/98
 *
 * Portions Copyright (c) 1996-2012, 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"

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

#define SnapshotNow			(&SnapshotNowData)
#define SnapshotSelf		(&SnapshotSelfData)
#define SnapshotAny			(&SnapshotAnyData)
#define SnapshotToast		(&SnapshotToastData)

/*
 * 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)

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

/*
 * 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)->t_data, 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(HeapTupleHeader tuple,
					   Snapshot snapshot, Buffer buffer);
extern bool HeapTupleSatisfiesNow(HeapTupleHeader tuple,
					  Snapshot snapshot, Buffer buffer);
extern bool HeapTupleSatisfiesSelf(HeapTupleHeader tuple,
					   Snapshot snapshot, Buffer buffer);
extern bool HeapTupleSatisfiesAny(HeapTupleHeader tuple,
					  Snapshot snapshot, Buffer buffer);
extern bool HeapTupleSatisfiesToast(HeapTupleHeader tuple,
						Snapshot snapshot, Buffer buffer);
extern bool HeapTupleSatisfiesDirty(HeapTupleHeader tuple,
						Snapshot snapshot, Buffer buffer);

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

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

#endif   /* TQUAL_H */

${this.title}

Code Editor : tqual.h