It took me some time to find out a way to perform mirroring between two
tables, and I'm not sure what I've come up with is the best way.
Here's how I'm doing it:

1. Get all rows from source
2. Get all rows from destination
3. full outer join them on the primary key
4. mark each row with flags "delete", "update", "insert"
5. branch on these flags and send each group of rows to an operation which
either, deletes, updates or inserts on the destination table.

Ideas?

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