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/*-------------------------------------------------------------------------
*
* psort.h
* Polyphase merge sort.
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: psort.h,v 1.23 1999/10/16 19:49:28 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef PSORT_H
#define PSORT_H
#include "access/htup.h"
#include "access/skey.h"
#include "nodes/plannodes.h"
extern bool psort_begin(Sort *node, int nkeys, ScanKey key);
extern HeapTuple psort_grabtuple(Sort *node, bool *should_free);
extern void psort_markpos(Sort *node);
extern void psort_restorepos(Sort *node);
extern void psort_end(Sort *node);
extern void psort_rescan(Sort *node);
#endif /* PSORT_H */
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