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An actual relational database not bound to the SQL nightmare would be something interesting indeed.

I haven't been that impressed with Tutorial D. I spent some time thinking about better ways to query relational and graph data; http://canonical.org/~kragen/binary-relations.html are some unfinished notes from that time.

Datalog is an existing thing in that space that's pretty sane.

What "SQL nightmare" is this?

For the record, I mostly work on "NoSQL" databases now (am an HBase committer). But I have no qualms with SQL, and it is certainly not a nightmare.

The godawful syntax (UPDATE vs INSERT). The godawful semantics -- it's not closed under composition, for instance; too, it is not set based, which means all kinds of hideous contortions with DISTINCT and whatnot.

I don't have much time for the K/V stores (save Redis) but I'm also sick like unto death with SQL.

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