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I have a CF, its PK is an UUID, I also have a column like regNum, it's a natural key. I do have an index on regNum.

Currently, whenever I try to insert a new record, I do a query on regNum to make sure there is no duplicate before generating an UUID for insertion.

However, I found out I do have duplicate regNum in this CF. Any idea how to prevent this? Thanks.

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UUID の代わりに regNum をキーとして設定できますか。それはあなたの問題を解決します

于 2013-03-16T13:10:45.417 に答える