On Feb 26, 2009, at 3:55 PM, phrrn...@googlemail.com wrote: > > I am doing some work on a SA engine for Sybase Adaptive Server > Enterprise (ASE) on top of both pyodbc and the Sybase DB-API driver. > The existing sybase engine for SA only works with Sybase Anywhere > (ASA).
that is correct ; I've recently had to take a look at this driver and realized that it was not really written for Sybase at all, and the original author is whereabouts unknown. To that end I would like it to be replaced with an actual Sybase driver. > There is a problem with named parameters with the Sybase driver in > that the placeholders are prepended with an '@' *and* the execute > method expects any dict paramers to have have keys that also have an > '@'. I was able to get the placeholders generated correctly by > subclassing the compiler. Any suggestions on how to get the execute > method to work nicely or do I have to do some much around with copying > parameters or monkeypatching the Sybase module with an implementation > of execute that will work with 'ordinary' dictionaries? the attached patch, which represents my partial progress, addresses this. Unfortuantely I was not able to continue since I was developing from a Mac to a development server, and it turns out that connecting with the Sybase driver using FreeTDS renders bind parameters inoperable. After several days of attempting to get the developer edition of sybase ASE running in a virtual linux environment (apparently only works on older versions of ubuntu/fedora, but even after installing those, I was unsuccessful), I gave up. If you have access to a working Sybase ASE environment, you can have full reign over the sybase.py dialect - anything specific to SQL Anywhere can be removed, since its an obsolete product and if it were supported, it would be in its own dialect. The Sybase driver may be targeted towards the 0.6 release of SQLAlchemy. Version 0.6 is oriented around a dialect refactor and schema expression refactor (there are no ORM changes) and would be a much better place to start building out new drivers - there are some significant differences in how dialects are constructed between 0.5 versus 0.6. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
sybase.patch
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