Thank you KlausG,
I'm been able to execute read/write query on the DB
from command line following your instructions.

Using -- require 'odbc_utf8' -- I've UTF-8 result that can be converted 
in iconv.

Same way, translating the string before the prepare statement it is 
...the right string! :-)


Now,
can I suppose that rails use -- require 'odbc_utf8' -- ?
I don't think so!

Let's go looking for this switch...

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