dbcommands_xlog.h

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/*-------------------------------------------------------------------------
 *
 * dbcommands_xlog.h
 *      Database resource manager XLOG definitions (create/drop database).
 *
 *
 * Portions Copyright (c) 1996-2022, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/commands/dbcommands_xlog.h
 *
 *-------------------------------------------------------------------------
 */
#ifndef DBCOMMANDS_XLOG_H
#define DBCOMMANDS_XLOG_H
 
#include "access/xlogreader.h"
#include "lib/stringinfo.h"
 
/* record types */
#define XLOG_DBASE_CREATE_FILE_COPY     0x00
#define XLOG_DBASE_CREATE_WAL_LOG       0x10
#define XLOG_DBASE_DROP                 0x20
 
/*
 * Single WAL record for an entire CREATE DATABASE operation. This is used
 * by the FILE_COPY strategy.
 */
typedef struct xl_dbase_create_file_copy_rec
{
    Oid         db_id;
    Oid         tablespace_id;
    Oid         src_db_id;
    Oid         src_tablespace_id;
} xl_dbase_create_file_copy_rec;
 
/*
 * WAL record for the beginning of a CREATE DATABASE operation, when the
 * WAL_LOG strategy is used. Each individual block will be logged separately
 * afterward.
 */
typedef struct xl_dbase_create_wal_log_rec
{
    Oid         db_id;
    Oid         tablespace_id;
} xl_dbase_create_wal_log_rec;
 
typedef struct xl_dbase_drop_rec
{
    Oid         db_id;
    int         ntablespaces;   /* number of tablespace IDs */
    Oid         tablespace_ids[FLEXIBLE_ARRAY_MEMBER];
} xl_dbase_drop_rec;
#define MinSizeOfDbaseDropRec offsetof(xl_dbase_drop_rec, tablespace_ids)
 
extern void dbase_redo(XLogReaderState *rptr);
extern void dbase_desc(StringInfo buf, XLogReaderState *rptr);
extern const char *dbase_identify(uint8 info);
 
#endif                          /* DBCOMMANDS_XLOG_H */