619 struct Pager {  struct
620   sqlite3_vfs *pVfs;          /* OS functions to use for IO */
644   u8 eState;                  /* Pager state (OPEN, READER, WRITER_LOCKED..) */  argument
667   PagerSavepoint *aSavepoint; /* Array of active savepoints */  argument
668   int nSavepoint;             /* Number of elements in aSavepoint[] */
669   u32 iDataVersion;           /* Changes whenever database content changes */
670   char dbFileVers[16];        /* Changes whenever database file changes */
672   int nMmapOut;               /* Number of mmap pages currently outstanding */
696   int (*xGet)(Pager*,Pgno,DbPage**,int); /* Routine to fetch a patch */  argument
697   char *pTmpSpace;            /* Pager.pageSize bytes of space for tmp use */  argument
706 ** Indexes for use with Pager.aStat[]. The Pager.aStat[] array contains  argument