[quote="andrew"]I am attempting some extensions to TinyERP.
Does cr.execute return the SQL error code?
Am I thinking at too low a level and worrying needlessly?
I don't see "official" code checking, so can I assume that any SQL errors will 
be handled gracefully by the core code?[/quote]

I think you are missing the fact that 'cr' is just the connection to the 
database. This is done using the psycopg database connector. The docs for that 
are here:
http://www.initd.org/tracker/psycopg/wiki/psycopg2_documentation

There's a lot going on -- I too am struggling to learn how terp is put 
together, so I can write what I need. I'm lucky that I've been using psycopg 
for years and get to skip that part of the learning curve, that's all.





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