greenplumn appendonly_visimap_store 源码
greenplumn appendonly_visimap_store 代码
文件路径：/src/include/access/appendonly_visimap_store.h
/*------------------------------------------------------------------------------
*
* appendonly_visimap_store
* responsible for storing and finding visimap entries.
*
* Copyright (c) 2013-Present VMware, Inc. or its affiliates.
*
*
* IDENTIFICATION
* src/include/access/appendonly_visimap_store.h
*
*------------------------------------------------------------------------------
*/
#ifndef APPENDONLY_VISIMAP_STORE_H
#define APPENDONLY_VISIMAP_STORE_H
#include "access/genam.h"
#include "access/skey.h"
#include "access/relscan.h"
#include "access/sdir.h"
#include "access/appendonly_visimap_entry.h"
#include "storage/lock.h"
#include "utils/rel.h"
#include "utils/snapshot.h"
/*
* The visimap store is responsible for all
* storage and scanning related activities of the visibility map.
*/
typedef struct AppendOnlyVisimapStore
{
ScanKey scanKeys;
/*
* Visibility map relation for the ao table.
*/
Relation visimapRelation;
/*
* Index on the visibility map relation
*/
Relation visimapIndex;
/*
* Snapshot to use for meta data operations. No ownership
*/
Snapshot snapshot;
/*
* Memory context to use for allocations. No ownership of memory context.
*/
MemoryContext memoryContext;
} AppendOnlyVisimapStore;
void AppendOnlyVisimapStore_Init(
AppendOnlyVisimapStore *visiMapStore,
Oid visimapRelId,
Oid visimapIdxId,
LOCKMODE lockmode,
Snapshot snapshot,
MemoryContext memoryContext);
void AppendOnlyVisimapStore_Finish(
AppendOnlyVisimapStore *visiMapStore,
LOCKMODE lockmode);
bool AppendOnlyVisimapStore_Find(
AppendOnlyVisimapStore *visiMapStore,
int32 segmentFileNum,
int64 firstRowNum,
AppendOnlyVisimapEntry *visiMapEntry);
void AppendOnlyVisimapStore_Store(
AppendOnlyVisimapStore *visiMapStore,
AppendOnlyVisimapEntry *visiMapEntry);
void AppendOnlyVisimapStore_DeleteSegmentFile(
AppendOnlyVisimapStore *visiMapStore,
int segno);
int64 AppendOnlyVisimapStore_GetSegmentFileHiddenTupleCount(
AppendOnlyVisimapStore *visiMapStore,
AppendOnlyVisimapEntry *visiMapEntry,
int segno);
int64 AppendOnlyVisimapStore_GetRelationHiddenTupleCount(
AppendOnlyVisimapStore *visiMapStore,
AppendOnlyVisimapEntry *visiMapEntry);
/* Scan related functions */
extern SysScanDesc AppendOnlyVisimapStore_BeginScan(AppendOnlyVisimapStore *visiMapStore,
int nkeys, ScanKey keys);
extern void AppendOnlyVisimapStore_EndScan(AppendOnlyVisimapStore *visiMapStore,
SysScanDesc indexScan);
extern bool AppendOnlyVisimapStore_GetNext(AppendOnlyVisimapStore *visiMapStore,
SysScanDesc indexScan,
ScanDirection scanDirection,
AppendOnlyVisimapEntry *visiMapEntry,
ItemPointerData *tupleTid);
#endif
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