226032 typedef struct sqlite3rbu sqlite3rbu;  typedef
226702 struct sqlite3rbu {  struct
226703   int eStage;                     /* Value of RBU_STATE_STAGE field */
226704   sqlite3 *dbMain;                /* target database handle */
226705   sqlite3 *dbRbu;                 /* rbu database handle */
226706   char *zTarget;                  /* Path to target db */
226707   char *zRbu;                     /* Path to rbu db */
226708   char *zState;                   /* Path to state db (or NULL if zRbu) */
226709   char zStateDb[5];               /* Db name for state ("stat" or "main") */
226710   int rc;                         /* Value returned by last rbu_step() call */
226711   char *zErrmsg;                  /* Error message if rc!=SQLITE_OK */
226712   int nStep;                      /* Rows processed for current object */
226713   sqlite3_int64 nProgress;        /* Rows processed for all objects */
226714   RbuObjIter objiter;             /* Iterator for skipping through tbl/idx */
226715   const char *zVfsName;           /* Name of automatically created rbu vfs */
226716   rbu_file *pTargetFd;            /* File handle open on target db */
226717   int nPagePerSector;             /* Pages per sector for pTargetFd */
226718   i64 iOalSz;
226719   i64 nPhaseOneStep;
226720   void *pRenameArg;
226721   int (*xRename)(void*, const char*, const char*);
226747 ** sqlite3rbu_create_vfs(). It is used to track the total amount of temp  argument
226754   sqlite3rbu *pRbu;               /* Owner RBU object */  argument