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/*-------------------------------------------------------------------------
*
* hio.h
* POSTGRES heap access method input/output definitions.
*
*
* Portions Copyright (c) 1996-2023, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/access/hio.h
*
*-------------------------------------------------------------------------
*/
#ifndef HIO_H
#define HIO_H
#include "access/htup.h"
#include "storage/buf.h"
#include "utils/relcache.h"
/*
* state for bulk inserts --- private to heapam.c and hio.c
*
* If current_buf isn't InvalidBuffer, then we are holding an extra pin
* on that buffer.
*
* "typedef struct BulkInsertStateData *BulkInsertState" is in heapam.h
*/
typedef struct BulkInsertStateData
{
BufferAccessStrategy strategy; /* our BULKWRITE strategy object */
Buffer current_buf; /* current insertion target page */
/*
* State for bulk extensions.
*
* last_free..next_free are further pages that were unused at the time of
* the last extension. They might be in use by the time we use them
* though, so rechecks are needed.
*
* XXX: Eventually these should probably live in RelationData instead,
* alongside targetblock.
*
* already_extended_by is the number of pages that this bulk inserted
* extended by. If we already extended by a significant number of pages,
* we can be more aggressive about extending going forward.
*/
BlockNumber next_free;
BlockNumber last_free;
uint32 already_extended_by;
} BulkInsertStateData;
extern void RelationPutHeapTuple(Relation relation, Buffer buffer,
HeapTuple tuple, bool token);
extern Buffer RelationGetBufferForTuple(Relation relation, Size len,
Buffer otherBuffer, int options,
BulkInsertStateData *bistate,
Buffer *vmbuffer, Buffer *vmbuffer_other,
int num_pages);
#endif /* HIO_H */
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