1996-08-28 03:59:28 +02:00
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/*-------------------------------------------------------------------------
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*
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* tqual.h--
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1997-09-07 07:04:48 +02:00
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* POSTGRES time qualification definitions.
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1996-08-28 03:59:28 +02:00
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*
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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1997-09-08 04:41:22 +02:00
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* $Id: tqual.h,v 1.8 1997/09/08 02:39:59 momjian Exp $
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1996-08-28 03:59:28 +02:00
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*
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* NOTE
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1997-09-07 07:04:48 +02:00
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* It may be desirable to allow time qualifications to indicate
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* relative times.
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1996-08-28 03:59:28 +02:00
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*
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*-------------------------------------------------------------------------
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*/
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1997-09-07 07:04:48 +02:00
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#ifndef TQUAL_H
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1996-08-28 03:59:28 +02:00
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#define TQUAL_H
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1996-11-04 08:18:46 +01:00
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#include <access/htup.h>
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1996-08-28 03:59:28 +02:00
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1997-09-07 07:04:48 +02:00
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typedef struct TimeQualSpace
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{
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1997-09-08 04:41:22 +02:00
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char data[12];
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} TimeQualSpace;
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1996-08-28 03:59:28 +02:00
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1997-09-07 07:04:48 +02:00
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typedef Pointer TimeQual;
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1996-08-28 03:59:28 +02:00
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/* Tuples valid as of StartTransactionCommand */
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1997-09-07 07:04:48 +02:00
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#define NowTimeQual ((TimeQual) NULL)
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1996-08-28 03:59:28 +02:00
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/* As above, plus updates in this command */
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1997-09-07 07:04:48 +02:00
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extern TimeQual SelfTimeQual;
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1996-08-28 03:59:28 +02:00
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1997-09-08 04:41:22 +02:00
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extern void setheapoverride(bool on);
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extern bool heapisoverride(void);
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1996-08-28 03:59:28 +02:00
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extern TimeQual TimeFormSnapshotTimeQual(AbsoluteTime time);
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1997-09-08 04:41:22 +02:00
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extern TimeQual
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TimeFormRangedTimeQual(AbsoluteTime startTime,
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AbsoluteTime endTime);
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1997-09-08 04:41:22 +02:00
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extern bool HeapTupleSatisfiesTimeQual(HeapTuple tuple, TimeQual qual);
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1996-08-28 03:59:28 +02:00
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1997-09-07 07:04:48 +02:00
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#endif /* TQUAL_H */
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