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/*-------------------------------------------------------------------------
*
* tuptoaster.h
* POSTGRES definitions for external and compressed storage
* of variable size attributes.
*
* Copyright (c) 2000, PostgreSQL Development Team
*
* $Id: tuptoaster.h,v 1.5 2000/07/04 06:11:50 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef TUPTOASTER_H
#define TUPTOASTER_H
#ifdef TUPLE_TOASTER_ACTIVE
#include "access/heapam.h"
#include "access/htup.h"
#include "access/tupmacs.h"
#include "utils/rel.h"
#define TOAST_MAX_CHUNK_SIZE ((MaxTupleSize - \
MAXALIGN( \
MAXALIGN(offsetof(HeapTupleHeaderData, t_bits)) + \
MAXALIGN(sizeof(Oid)) + \
MAXALIGN(sizeof(int32)) + \
MAXALIGN(VARHDRSZ))) / 4)
extern void heap_tuple_toast_attrs(Relation rel,
HeapTuple newtup, HeapTuple oldtup);
extern varattrib *heap_tuple_untoast_attr(varattrib * attr);
#endif /* TUPLE_TOASTER_ACTIVE */
#endif /* TUPTOASTER_H */
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