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I have an ETL problem that's small enough to live in memory but complex enough to be managed by a team of SQL devs. What's the best way to get very fast standard-compliant SQL where concurrency isn't needed? SQLite is out, as Full Outer Join is absent and we use it. I haven't been having good luck with Ignite so far, as SQL in it really isn't that fast.

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    Note that you can simulate FULL JOIN with SQLite with some modifications. Otherwise, it fills every other criteria. – Alejandro Feb 23 '18 at 14:02
  • HSQLDB and H2 come to mind – a_horse_with_no_name Mar 1 '18 at 11:29
  • I'm basically landing with a local spark process at this point. It seems to work well, despite lack of indexes. – Carbon Mar 1 '18 at 14:28

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