63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
/*-------------------------------------------------------------------------
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*
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* hio.h
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* POSTGRES heap access method input/output definitions.
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*
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*
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* Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/access/hio.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef HIO_H
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#define HIO_H
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#include "access/htup.h"
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#include "storage/buf.h"
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#include "utils/relcache.h"
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/*
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* state for bulk inserts --- private to heapam.c and hio.c
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*
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* If current_buf isn't InvalidBuffer, then we are holding an extra pin
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* on that buffer.
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*
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* "typedef struct BulkInsertStateData *BulkInsertState" is in heapam.h
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*/
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typedef struct BulkInsertStateData
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{
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BufferAccessStrategy strategy; /* our BULKWRITE strategy object */
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Buffer current_buf; /* current insertion target page */
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/*
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* State for bulk extensions.
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*
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* last_free..next_free are further pages that were unused at the time of
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* the last extension. They might be in use by the time we use them
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* though, so rechecks are needed.
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*
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* XXX: Eventually these should probably live in RelationData instead,
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* alongside targetblock.
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*
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* already_extended_by is the number of pages that this bulk inserted
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* extended by. If we already extended by a significant number of pages,
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* we can be more aggressive about extending going forward.
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*/
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BlockNumber next_free;
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BlockNumber last_free;
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uint32 already_extended_by;
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} BulkInsertStateData;
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extern void RelationPutHeapTuple(Relation relation, Buffer buffer,
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HeapTuple tuple, bool token);
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extern Buffer RelationGetBufferForTuple(Relation relation, Size len,
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Buffer otherBuffer, int options,
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BulkInsertStateData *bistate,
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Buffer *vmbuffer, Buffer *vmbuffer_other,
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int num_pages);
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#endif /* HIO_H */
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