Postgres95 1.01 Distribution - Virgin SourcesPG95-1_01

1 files changed, 55 insertions, 0 deletions

diff --git a/src/backend/utils/tqual.h b/src/backend/utils/tqual.h
new file mode 100644
index 00000000000..294fb18a3e6
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+++ b/src/backend/utils/tqual.h
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+/*-------------------------------------------------------------------------
+ *
+ * tqual.h--
+ *    POSTGRES time qualification definitions.
+ *
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ * $Id: tqual.h,v 1.1.1.1 1996/07/09 06:22:02 scrappy Exp $
+ *
+ * NOTE
+ *    It may be desirable to allow time qualifications to indicate
+ *    relative times.
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef	TQUAL_H
+#define TQUAL_H
+
+#include "postgres.h"
+#include "utils/nabstime.h"
+#include "access/htup.h"
+
+typedef struct TimeQualSpace {
+    char	data[12];
+} TimeQualSpace;
+
+typedef Pointer	TimeQual;
+
+/* Tuples valid as of StartTransactionCommand */
+#define	NowTimeQual	((TimeQual) NULL)
+
+/* As above, plus updates in this command */
+extern TimeQual	SelfTimeQual;
+
+extern void setheapoverride(bool on);
+extern bool heapisoverride(void);
+
+extern bool TimeQualIsValid(TimeQual qual);
+extern bool TimeQualIsLegal(TimeQual qual);
+extern bool TimeQualIncludesNow(TimeQual qual);
+extern bool TimeQualIncludesPast(TimeQual qual);
+extern bool TimeQualIsSnapshot(TimeQual qual);
+extern bool TimeQualIsRanged(TimeQual qual);
+extern bool TimeQualIndicatesDisableValidityChecking(TimeQual qual);
+extern AbsoluteTime TimeQualGetSnapshotTime(TimeQual qual);
+extern AbsoluteTime TimeQualGetStartTime(TimeQual qual);
+extern AbsoluteTime TimeQualGetEndTime(TimeQual qual);
+extern TimeQual TimeFormSnapshotTimeQual(AbsoluteTime time);
+extern TimeQual TimeFormRangedTimeQual(AbsoluteTime startTime,
+				       AbsoluteTime endTime);
+extern bool HeapTupleSatisfiesTimeQual(HeapTuple tuple, TimeQual qual);
+
+
+#endif	/* TQUAL_H */