On Feb 5, 2012, at 11:10 PM, Anthony Foglia wrote: > > If I do shut off the outputtypehandler on the connection, will that > cause any other problems as I start adding Table objects with the > appropriate Columns? Will the connection outputtypehandler be reset > when it goes back into the pool? Or should I just keep one connection > from returning to the pool solely for these old style queries?
The outputtypehandler should only be set on the Connection by SQLAlchemy using the same event I gave you, the "connect" event, and it should occur before your handler would get to it. So whatever state you set on it should remain. Without the handler, you get back datatypes like str instead of unicode, and float instead of Decimal. The only area that there would be some dependency on the type returned is when a TypeEngine, like String, Unicode, or Numeric are in use. The String type should be fine. The cx_oracle-specific implementation of numeric here, which is sqlalchemy.dialects.oracle.cx_oracle._OracleNumeric, looks like it might assume it's getting a Decimal or string back if that supports_native_decimal flag is turned on, so if you're using that type you might need to flip that flag off, or do an outputtypehandler similar to the one that's there which just returns decimals as strings. Attached is a patch that allows "coerce_to_decimal" to be passed to create_engine() and will disable the output handling if passed as False. Do you want to give it a try, I can commit it for 0.7.6 if it does the trick.
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2399.patch
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