greenplumn hio 源码
greenplumn hio 代码
文件路径：/src/include/access/hio.h
/*-------------------------------------------------------------------------
*
* hio.h
* POSTGRES heap access method input/output definitions.
*
*
* Portions Copyright (c) 1996-2019, 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 "utils/relcache.h"
#include "storage/buf.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 */
} 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);
#endif /* HIO_H */
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