1 files changed, 87 insertions, 0 deletions
diff --git a/src/backend/access/relscan.h b/src/backend/access/relscan.h
new file mode 100644
index 00000000000..7899e9d945f
--- /dev/null
+++ b/src/backend/access/relscan.h
@@ -0,0 +1,87 @@
+/*-------------------------------------------------------------------------
+ *
+ * relscan.h--
+ *    POSTGRES internal relation scan descriptor definitions.
+ *
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ * $Id: relscan.h,v 1.1.1.1 1996/07/09 06:21:08 scrappy Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef	RELSCAN_H
+#define RELSCAN_H
+
+#include "c.h"
+
+#include "access/skey.h"
+#include "storage/buf.h"
+#include "access/htup.h"
+#include "storage/itemptr.h"
+
+#include "utils/tqual.h"
+#include "utils/rel.h"
+
+
+typedef ItemPointerData	MarkData;
+
+typedef struct HeapScanDescData {
+	Relation	rs_rd;		/* pointer to relation descriptor */
+	HeapTuple	rs_ptup;	/* previous tuple in scan */
+	HeapTuple	rs_ctup;	/* current tuple in scan */
+	HeapTuple	rs_ntup;	/* next tuple in scan */
+	Buffer		rs_pbuf;	/* previous buffer in scan */
+	Buffer		rs_cbuf;	/* current buffer in scan */
+	Buffer		rs_nbuf;	/* next buffer in scan */
+	ItemPointerData	rs_mptid;	/* marked previous tid */
+	ItemPointerData	rs_mctid;	/* marked current tid */
+	ItemPointerData	rs_mntid;	/* marked next tid */
+	ItemPointerData	rs_mcd;		/* marked current delta XXX ??? */
+	bool		rs_atend;	/* restart scan at end? */
+	TimeQual	rs_tr;		/* time qualification */
+	uint16		rs_cdelta;	/* current delta in chain */
+	uint16		rs_nkeys;	/* number of attributes in keys */
+	ScanKey		rs_key;		/* key descriptors */
+} HeapScanDescData;
+
+typedef HeapScanDescData *HeapScanDesc;
+
+typedef struct IndexScanDescData {
+	Relation	relation;		/* relation descriptor */
+	void		*opaque;		/* am-specific slot */
+	ItemPointerData	previousItemData;	/* previous index pointer */
+	ItemPointerData	currentItemData;	/* current index pointer */
+	ItemPointerData	nextItemData;		/* next index pointer */
+	MarkData	previousMarkData;	/* marked previous pointer */
+	MarkData	currentMarkData;	/* marked current  pointer */
+	MarkData	nextMarkData;		/* marked next pointer */
+	uint8		flags;			/* scan position flags */
+	bool		scanFromEnd;		/* restart scan at end? */
+	uint16		numberOfKeys;		/* number of key attributes */
+	ScanKey		keyData;		/* key descriptor */
+} IndexScanDescData;
+
+typedef IndexScanDescData	*IndexScanDesc;
+
+/* ----------------
+ *	IndexScanDescPtr is used in the executor where we have to
+ *	keep track of several index scans when using several indices
+ *	- cim 9/10/89
+ * ----------------
+ */
+typedef IndexScanDesc		*IndexScanDescPtr;
+
+/*
+ * HeapScanIsValid --
+ *	True iff the heap scan is valid.
+ */
+#define	HeapScanIsValid(scan) PointerIsValid(scan)
+
+/*
+ * IndexScanIsValid --
+ *	True iff the index scan is valid.
+ */
+#define IndexScanIsValid(scan) PointerIsValid(scan)
+
+#endif	/* RELSCAN_H */