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Jun 25, 2018 at 19:40 comment added Andy That's unfortunate...for all intents and purposes, shouldn't IS DISTINCT FROM be an operator? Seems like just a technical limitation of the parser rather than a semantic issue.
Mar 7, 2014 at 19:45 comment added Erwin Brandstetter @JackDouglas: I added an alternative solution with standard operators.
Mar 7, 2014 at 16:16 comment added Jack Douglas This answer and @Erwin's suggested tweaks are really excellent. I'm accepting Andriy's but it is just a case of personal preference: I'm sure many will prefer the elegance of yours.
Mar 7, 2014 at 7:47 comment added Andriy M This is definitely much superior to the workaround I suggested, especially with @Erwin's improvement.
Mar 7, 2014 at 5:40 comment added Erwin Brandstetter Excellent, insightful answer.
Mar 6, 2014 at 22:30 history answered Daniel Vérité CC BY-SA 3.0