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The fact that this is an enum is actually not a problem (the rest of the technique would work), but if you’re wrapping a different crate you’ll need a newtype wrapper:，更多细节参见新收录的资料
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Фото: Александр Казаков / РИА Новости。业内人士推荐新收录的资料作为进阶阅读
As an additional optimization, we can create a partial GIN index on the predicate severity