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/*-------------------------------------------------------------------------
*
* brin_xlog.h
* POSTGRES BRIN access XLOG definitions.
*
*
* Portions Copyright (c) 1996-2014, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/access/brin_xlog.h
*
*-------------------------------------------------------------------------
*/
#ifndef BRIN_XLOG_H
#define BRIN_XLOG_H
#include "access/xlogrecord.h"
#include "lib/stringinfo.h"
#include "storage/bufpage.h"
#include "storage/itemptr.h"
#include "storage/relfilenode.h"
#include "utils/relcache.h"
/*
* WAL record definitions for BRIN's WAL operations
*
* XLOG allows to store some information in high 4 bits of log
* record xl_info field.
*/
#define XLOG_BRIN_CREATE_INDEX 0x00
#define XLOG_BRIN_INSERT 0x10
#define XLOG_BRIN_UPDATE 0x20
#define XLOG_BRIN_SAMEPAGE_UPDATE 0x30
#define XLOG_BRIN_REVMAP_EXTEND 0x40
#define XLOG_BRIN_REVMAP_VACUUM 0x50
#define XLOG_BRIN_OPMASK 0x70
/*
* When we insert the first item on a new page, we restore the entire page in
* redo.
*/
#define XLOG_BRIN_INIT_PAGE 0x80
/* This is what we need to know about a BRIN index create */
typedef struct xl_brin_createidx
{
BlockNumber pagesPerRange;
RelFileNode node;
uint16 version;
} xl_brin_createidx;
#define SizeOfBrinCreateIdx (offsetof(xl_brin_createidx, version) + sizeof(uint16))
/*
* This is what we need to know about a BRIN tuple insert
*/
typedef struct xl_brin_insert
{
RelFileNode node;
BlockNumber heapBlk;
/* extra information needed to update the revmap */
BlockNumber revmapBlk;
BlockNumber pagesPerRange;
uint16 tuplen;
ItemPointerData tid;
/* tuple data follows at end of struct */
} xl_brin_insert;
#define SizeOfBrinInsert (offsetof(xl_brin_insert, tid) + sizeof(ItemPointerData))
/*
* A cross-page update is the same as an insert, but also store the old tid.
*/
typedef struct xl_brin_update
{
ItemPointerData oldtid;
xl_brin_insert insert;
} xl_brin_update;
#define SizeOfBrinUpdate (offsetof(xl_brin_update, insert) + SizeOfBrinInsert)
/* This is what we need to know about a BRIN tuple samepage update */
typedef struct xl_brin_samepage_update
{
RelFileNode node;
ItemPointerData tid;
/* tuple data follows at end of struct */
} xl_brin_samepage_update;
#define SizeOfBrinSamepageUpdate (offsetof(xl_brin_samepage_update, tid) + sizeof(ItemPointerData))
/* This is what we need to know about a revmap extension */
typedef struct xl_brin_revmap_extend
{
RelFileNode node;
BlockNumber targetBlk;
} xl_brin_revmap_extend;
#define SizeOfBrinRevmapExtend (offsetof(xl_brin_revmap_extend, targetBlk) + \
sizeof(BlockNumber))
extern void brin_desc(StringInfo buf, XLogRecord *record);
extern void brin_redo(XLogRecPtr lsn, XLogRecord *record);
extern const char *brin_identify(uint8 info);
#endif /* BRIN_XLOG_H */
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