What do you like about prepared statements? Since you can't access them, they provide you no external benefit as a caller, but give you a quantifiable performance degradation. The only reason I can think to like them is it allows the oursql implementation to avoid writing code to handle string interpolation of SQL arguments. This feels like a pretty expensive way to avoid client-side string interpolation.
Prepared statements can add some substantial overhead to each individual transaction, so are really only used when you plan to retain the statement for frequent use. I'd suggest we default to a dynamic interface like most other sql libraries, but make available the option to use prepared statements. -- You received this bug notification because you are a member of Agesys Team, which is subscribed to oursql. https://bugs.launchpad.net/bugs/1046706 Title: Prepared statements used for all queries Status in oursql: New Bug description: I am new to Python and oursql. In diagnosing why queries were so much slower in a Python vs. Ruby application, I noticed you are creating, using and then discarding prepared statements for EVERY query (see cursor.execute). As best as I can tell, this is to avoid dealing with the string interpolation of SQL arguments (e.g. which seems to be handled with varying degrees of success in MySQLdb module). It seems though this is a defect, since the two step process of a prepared statement adds overhead that can be substantial in some use cases. This overhead is typically only of use if you plan on actually re- using the prepared statement. Assuming my understanding above is correct, I would suggest the current interface should always be dynamic, since you do not intend to cache statements. I suspect most Python programmers who switched from MySQLdb do not realize the additional overhead they incur for executing a query, since this module defaults to dynamic SQL. To manage notifications about this bug go to: https://bugs.launchpad.net/oursql/+bug/1046706/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~agesys-dev Post to : [email protected] Unsubscribe : https://launchpad.net/~agesys-dev More help : https://help.launchpad.net/ListHelp
