Paulo Roberto wrote: > I need some help to do a simple operation, increment a counter and get its > former value. > I could have some race condition, so the transaction must be atomic. > > I also would like to use prepared statements to accomplish that, so I have > less effort sanitizing inputs.
Integer numbers would not need to be sanitized. > "BEGIN EXCLUSIVE TRANSACTION;" > "SELECT counter FROM mytable WHERE counterid = ?;" > "UPDATE mytable SET counter=? WHERE counterid = ?;" > "COMMIT TRANSACTION;" > My question is: Preparing 4 statements, binding then and calling *sqlite3_step > *for each one of then in order, would have the expected atomic operation > behavior? Yes; that is what transactions are for. (You have to ensure that errors in the middle statements are handled correctly.) Regards, Clemens _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
