On 12/11/17, advancenOO <[email protected]> wrote: > > At the same time, Mmap() is only used for reading by default, not writing. > But why?
If the database is memory-mapped writable, then a stray pointer or array overrun in the application (NB: not in SQLite - in the application that uses SQLite) could easily overwrite part of the database file and corrupt the database file. It is also possible for this to happen without the use of writable memory-maps, if the application corrupts internal SQLite data structures and a subsequent COMMIT occurs. But that is much less likely, as SQLite would probably detect the situation before the COMMIT completes, thus leaving the database intact. -- D. Richard Hipp [email protected] _______________________________________________ sqlite-users mailing list [email protected] http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
