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Flip around field/table aliases, do joins a bit differently. They're my main
aims at the moment! I'll also add a preprocessor for the compiler to massage it
into a nicer form there.
I discovered that joins can be done with a pretty sweet syntax in SQL:
(tableA LEFT JOIN tableB) RIGHT JOIN tableC
This is pretty much perfect for my purposes.
Flipping alias maps just makes more sense and removes a whole bunch of
`flip-map` calls that would be unnecessary if the aliases were the other way
around. The user-facing side of the DSL will be left unchanged, though. The
user provides an `{old-name new-name}` map and internally we convert that into
`{new-name old-name}`. Like magic.
I'm also adding a bunch more tests. Hopefully that will make things more likely
to work for long periods of time.
Peace out!
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