relmapper.h

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/*-------------------------------------------------------------------------
 *
 * relmapper.h
 *    Catalog-to-filenumber mapping
 *
 *
 * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/utils/relmapper.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef RELMAPPER_H
#define RELMAPPER_H
 
#include "access/xlogreader.h"
#include "lib/stringinfo.h"
 
/* ----------------
 *      relmap-related XLOG entries
 * ----------------
 */
 
#define XLOG_RELMAP_UPDATE      0x00
 
typedef struct xl_relmap_update
{
    Oid         dbid;           /* database ID, or 0 for shared map */
    Oid         tsid;           /* database's tablespace, or pg_global */
    int32       nbytes;         /* size of relmap data */
    char        data[FLEXIBLE_ARRAY_MEMBER];
} xl_relmap_update;
 
#define MinSizeOfRelmapUpdate offsetof(xl_relmap_update, data)
 
 
extern RelFileNumber RelationMapOidToFilenumber(Oid relationId, bool shared);
 
extern Oid  RelationMapFilenumberToOid(RelFileNumber filenumber, bool shared);
extern RelFileNumber RelationMapOidToFilenumberForDatabase(char *dbpath,
                                                           Oid relationId);
extern void RelationMapCopy(Oid dbid, Oid tsid, char *srcdbpath,
                            char *dstdbpath);
extern void RelationMapUpdateMap(Oid relationId, RelFileNumber fileNumber,
                                 bool shared, bool immediate);
 
extern void RelationMapRemoveMapping(Oid relationId);
 
extern void RelationMapInvalidate(bool shared);
extern void RelationMapInvalidateAll(void);
 
extern void AtCCI_RelationMap(void);
extern void AtEOXact_RelationMap(bool isCommit, bool isParallelWorker);
extern void AtPrepare_RelationMap(void);
 
extern void CheckPointRelationMap(void);
 
extern void RelationMapFinishBootstrap(void);
 
extern void RelationMapInitialize(void);
extern void RelationMapInitializePhase2(void);
extern void RelationMapInitializePhase3(void);
 
extern Size EstimateRelationMapSpace(void);
extern void SerializeRelationMap(Size maxSize, char *startAddress);
extern void RestoreRelationMap(char *startAddress);
 
extern void relmap_redo(XLogReaderState *record);
extern void relmap_desc(StringInfo buf, XLogReaderState *record);
extern const char *relmap_identify(uint8 info);
 
#endif                          /* RELMAPPER_H */