Handle SMALLINT and FLOAT oracle db types

[sashabaranov]

cx_Oracle 5.x does not handle SMALLINT and FLOAT db types. I am unsure about v6, but fix for 5.x is in #3

[anthony-tuininga]

Thanks. Can you provide a test case that doesn't work before your patch but does afterwards? Thanks.

[sashabaranov]

Sorry, I cant really reproduce this now, but basically I've experienced inability to query SMALLINT and FLOAT columns via SQLAlchemy and this fix helped.

[anthony-tuininga]

Both 5.x and 6.x patches have now been applied.

[sashabaranov]

I'm still getting error message cx_Oracle.NotSupportedError: Object_ConvertToPython(): unhandled data type 246 from branch v5.x

[anthony-tuininga]

That seems rather strange. The test suite was updated to include smallint and float types and it passes. Please make sure that you are running the updated code!