SQL query logging for SQLite?

I ne开发者_开发问答ed to log queries, not only inserts/updates/deletes but also selects and other queries, from a number of applications that use SQLite. Introducing logging to the applications would in this case not be a feasible solution in practice. So how can I enable query logging in SQLite itself?

Take a look at the sqlite Trace API. You have to implement the callback yourself.

void *sqlite3_trace(sqlite3*, void(*xTrace)(void*,const char*), void*);

The callback function registered by sqlite3_trace() is invoked at various times when an SQL statement is being run by sqlite3_step(). The callback returns a UTF-8 rendering of the SQL statement text as the statement first begins executing. Additional callbacks occur as each triggered subprogram is entered.