The fun thing about maintaining something like jOOQ is that I keep running into *every* edge case, and *every* unsupported feature of some RDBMS
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At the same time, so far, PostgreSQL is the only RDBMS I've seen so far that lifts the arbitrary restriction of requiring at least one column in a table.
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Accepting 0 column tables simplifies the implementation of various internal Postgres subsystems, too
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Oh really? Intriguing! What would be an example of such a simplification?
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Not supporting zero column tables necessitates weird special cases for ALTER TABLE DROP COLUMN