morningman commented on issue #2911: Support not_empty function and empty function URL: https://github.com/apache/incubator-doris/pull/2911#issuecomment-587005666 > I think is necessary ,length(null) == null and empty(null) == 1. And empty(array) is necessary when we implement complex type so maybe `null_or_empty` is better? like `Strings.isNullOrEmpty(xxx)` in Guava lib ?
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