I'm trying to work on a universal table generator based on in-memory table 
objects. The code is based on the work from the pandas to_sql.

I'll be targeting Oracle, Postgres, MySQL, and SQLite for sure.

It seems like making sure to use Float(53) is the best way to guarantee that a 
column will be generated with a double-precision Floating point in all of these 
database backends without introspecting the engine at runtime.

Pandas does that here:
https://github.com/pandas-dev/pandas/blob/master/pandas/io/sql.py#L879

Is this generally true?

Also, should I use the generic Float type, or the SQL FLOAT type? It doesn't 
seem like there's a huge functional difference.

Brian

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