> whom to trust? Trust Kees. Borgan's thought about keeping the lock and transaction management inside sqlite3_exec is incorrect.
> as for Kees Nuyt reply, did you toke int account that "select > last_insert_rowid() " > and insert query combined in single query and executed via single call > of sqlite3_exec()? Actually it depends on particular implementation of sqlite3_exec. Kees' reply is general and it would stand if sqlite3_exec didn't acquire connection's mutex and let individual statements acquire mutex as necessary. But as I see in SQLite sources sqlite3_exec does acquire connection's mutex, so nothing can be executed in between statements. Thus if you execute this line as one call to sqlite3_exec then it won't suffer from threading. Pavel On Tue, Nov 16, 2010 at 8:08 AM, Ruslan Mullakhmetov <r.mullakhme...@tools4brokers.com> wrote: > i got following contradictory replies to my question > >> if i execute query like " insert into tbl( filed ) VALUES ( 1 ); Select >> last_insert_rowid() as li;" would be it atomic? or it anyway would suffer >> from threads? > > from borgan: >> Hi, i think this will probably be "atomic". >> What i mean is the transaction will aquire EXCLUSIVE lock (because of >> the insert command) and it will keep this lock until commit, which >> takes place after the last select and last semicolon. >> >> So i believe no other threads should be able to do anything with your >> db until the whole query finishes. > and from Kees Nuyt: >> The last_insert_rowid() function returns the ROWID of the last row >> insert from the database connection which invoked the function. >> So, yes, it suffers from threads if the threads use the same >> database connection. > > whom to trust? > > as for Kees Nuyt reply, did you toke int account that "select > last_insert_rowid() " > and insert query combined in single query and executed via single call > of sqlite3_exec()? > > BR, RM > _______________________________________________ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
