SQLITE_FCNTL_DB_UNCHANGED 27937 ext/sqlite3/libsqlite/sqlite3.c     case SQLITE_FCNTL_DB_UNCHANGED: {
SQLITE_FCNTL_DB_UNCHANGED 39534 ext/sqlite3/libsqlite/sqlite3.c     sqlite3OsFileControl(pPager->fd,SQLITE_FCNTL_DB_UNCHANGED,0)>=SQLITE_OK