Moved from backend/access to include/access

2025-10-25 13:17:41 +03:00 · 1996-08-27 21:50:29 +00:00
parent 9247b29228
commit 5a8820efcd
28 changed files with 2418 additions and 0 deletions
--- a/src/include/access/itup.h
+++ b/src/include/access/itup.h
@@ -0,0 +1,104 @@
+/*-------------------------------------------------------------------------
+ *
+ * itup.h--
+ *    POSTGRES index tuple definitions.
+ *
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ * $Id: itup.h,v 1.1 1996/08/27 21:50:18 scrappy Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef ITUP_H
+#define ITUP_H
+
+#include "c.h"
+#include "access/ibit.h"
+#include "access/tupdesc.h"	/* for TupleDesc */
+#include "storage/itemptr.h"
+
+#define MaxIndexAttributeNumber	7
+
+typedef struct IndexTupleData {
+    ItemPointerData		t_tid; /* reference TID to base tuple */
+
+    /*
+     * t_info is layed out in the following fashion:
+     *
+     * 15th (leftmost) bit: "has nulls" bit
+     * 14th bit: "has varlenas" bit
+     * 13th bit: "has rules" bit - (removed ay 11/94)
+     * bits 12-0 bit: size of tuple.
+     */
+
+    unsigned short		t_info; /* various info about tuple */
+
+    /*
+     * please make sure sizeof(IndexTupleData) is MAXALIGN'ed.
+     * See IndexInfoFindDataOffset() for the reason.
+     */
+    
+} IndexTupleData;		/* MORE DATA FOLLOWS AT END OF STRUCT */
+
+typedef IndexTupleData	*IndexTuple;
+
+
+typedef struct InsertIndexResultData {
+    ItemPointerData	pointerData;
+} InsertIndexResultData;
+
+typedef InsertIndexResultData *InsertIndexResult;
+
+
+typedef struct RetrieveIndexResultData {
+    ItemPointerData	index_iptr;
+    ItemPointerData	heap_iptr;
+} RetrieveIndexResultData;
+
+typedef RetrieveIndexResultData	*RetrieveIndexResult;
+
+
+/*-----------------
+ * PredInfo -
+ *    used for partial indices
+ *-----------------
+ */
+typedef struct PredInfo {
+    Node		*pred;
+    Node		*oldPred;
+} PredInfo;
+
+
+/* ----------------
+ *	externs 
+ * ----------------
+ */
+
+#define INDEX_SIZE_MASK 0x1FFF
+#define INDEX_NULL_MASK 0x8000
+#define INDEX_VAR_MASK  0x4000
+
+#define IndexTupleSize(itup)       (((IndexTuple) (itup))->t_info & 0x1FFF)
+#define IndexTupleDSize(itup)                      ((itup).t_info & 0x1FFF)
+#define IndexTupleNoNulls(itup)  (!(((IndexTuple) (itup))->t_info & 0x8000))
+#define IndexTupleAllFixed(itup) (!(((IndexTuple) (itup))->t_info & 0x4000))
+
+#define IndexTupleHasMinHeader(itup) (IndexTupleNoNulls(itup))
+
+
+/* indextuple.h */
+extern IndexTuple index_formtuple(TupleDesc tupleDescriptor,
+				  Datum value[], char null[]);
+extern char *fastgetiattr(IndexTuple tup, int attnum,
+	TupleDesc att, bool *isnull);
+extern Datum index_getattr(IndexTuple tuple, AttrNumber attNum,
+	TupleDesc tupDesc, bool *isNullOutP);
+extern RetrieveIndexResult
+FormRetrieveIndexResult(ItemPointer indexItemPointer,
+			ItemPointer heapItemPointer);
+extern void CopyIndexTuple(IndexTuple source, IndexTuple *target);
+
+
+#endif	/* ITUP_H */
+