greenplumn aomd 源码
greenplumn aomd 代码
文件路径：/src/include/access/aomd.h
/*-------------------------------------------------------------------------
*
* aomd.h
* Declarations and functions for supporting aomd.c
*
* Portions Copyright (c) 2008, Greenplum Inc.
* Portions Copyright (c) 2012-Present VMware, Inc. or its affiliates.
*
*
* IDENTIFICATION
* src/include/access/aomd.h
*
*-------------------------------------------------------------------------
*/
#ifndef AOMD_H
#define AOMD_H
#include "htup_details.h"
#include "storage/fd.h"
#include "utils/rel.h"
extern int AOSegmentFilePathNameLen(Relation rel);
extern void FormatAOSegmentFileName(
char *basepath,
int segno,
int col,
int32 *fileSegNo,
char *filepathname);
extern void MakeAOSegmentFileName(
Relation rel,
int segno,
int col,
int32 *fileSegNo,
char *filepathname);
extern File OpenAOSegmentFile(char *filepathname, int64 logicalEof);
extern void CloseAOSegmentFile(File fd);
extern void
TruncateAOSegmentFile(File fd,
Relation rel,
int32 segmentFileNum,
int64 offset);
extern void ao_truncate_one_rel(Relation rel);
extern void
mdunlink_ao(RelFileNodeBackend rnode, ForkNumber forkNumber, bool isRedo);
extern void
copy_append_only_data(RelFileNode src, RelFileNode dst, BackendId backendid, char relpersistence);
/*
* return value should be true if the callback was able to find the given
* segment number on disk and false otherwise. Failures during operation should
* be handled out of band, either with a PG_THROW/elog/etc., or through the
* passed user context.
*/
typedef bool (*ao_extent_callback)(int segno, void *ctx);
extern void ao_foreach_extent_file(ao_extent_callback callback, void *ctx);
extern void register_dirty_segment_ao(RelFileNode rnode, int segno, File vfd);
#endif /* AOMD_H */
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