60 lines
1.9 KiB
C
60 lines
1.9 KiB
C
/*
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* xlogutils.h
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*
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* Utilities for replaying WAL records.
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*
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* Portions Copyright (c) 1996-2020, 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/xlogutils.h
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*/
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#ifndef XLOG_UTILS_H
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#define XLOG_UTILS_H
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#include "access/xlogreader.h"
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#include "storage/bufmgr.h"
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extern bool XLogHaveInvalidPages(void);
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extern void XLogCheckInvalidPages(void);
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extern void XLogDropRelation(RelFileNode rnode, ForkNumber forknum);
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extern void XLogDropDatabase(Oid dbid);
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extern void XLogTruncateRelation(RelFileNode rnode, ForkNumber forkNum,
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BlockNumber nblocks);
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/* Result codes for XLogReadBufferForRedo[Extended] */
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typedef enum
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{
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BLK_NEEDS_REDO, /* changes from WAL record need to be applied */
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BLK_DONE, /* block is already up-to-date */
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BLK_RESTORED, /* block was restored from a full-page image */
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BLK_NOTFOUND /* block was not found (and hence does not
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* need to be replayed) */
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} XLogRedoAction;
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extern XLogRedoAction XLogReadBufferForRedo(XLogReaderState *record,
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uint8 buffer_id, Buffer *buf);
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extern Buffer XLogInitBufferForRedo(XLogReaderState *record, uint8 block_id);
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extern XLogRedoAction XLogReadBufferForRedoExtended(XLogReaderState *record,
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uint8 buffer_id,
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ReadBufferMode mode, bool get_cleanup_lock,
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Buffer *buf);
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extern Buffer XLogReadBufferExtended(RelFileNode rnode, ForkNumber forknum,
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BlockNumber blkno, ReadBufferMode mode);
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extern Relation CreateFakeRelcacheEntry(RelFileNode rnode);
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extern void FreeFakeRelcacheEntry(Relation fakerel);
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extern int read_local_xlog_page(XLogReaderState *state,
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XLogRecPtr targetPagePtr, int reqLen,
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XLogRecPtr targetRecPtr, char *cur_page);
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extern void XLogReadDetermineTimeline(XLogReaderState *state,
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XLogRecPtr wantPage, uint32 wantLength);
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extern void WALReadRaiseError(WALReadError *errinfo);
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#endif
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