Thank you for your reply Wichert, I already used the Inspector method get_table_names(), but using that I'd have to check if a table name is present in a vector which can have 100.000 elements. This can be even slower if done for lots of times. Maybe I can perform a binary search, but I'm not sure that the resulting vector is ordered. Am I wrong? Other Ideas?
On 25 Apr, 16:11, Wichert Akkerman <wich...@wiggy.net> wrote: > On 04/25/2012 03:57 PM, Massi wrote: > > > > > > > > > > > Hi everyone, > > > in my script I have to deal with a huge database with thousands of > > tables. Given a table name (a python string) I would have to now if > > such a table exists or not. Up to now I have written this function: > > > def DBGetTableByName(table_name) : > > metadata = MetaData(engine) > > try : > > table = Table(table_name, metadata, autoload=True) > > return table > > except NoSuchTableError : > > return None > > > I use its return value to check if the table exists, but the problem > > is that it is too slow. Since I have to repeat this operation several > > times I wonder if there is a faster (and smarter) way to perform this > > control. > > Any hints? > > Use the inspector: > > from sqlalchemy.engine.reflection import Inspector > > inspector = Inspector.from_engine(engine) > print table_name in inspector.get_table_names() > > You can find the documentation > here:http://docs.sqlalchemy.org/en/rel_0_7/core/schema.html?highlight=insp... > > Wichert. -- 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.
