After test,it do will insert a new record.



------------------ Original ------------------
From:  "????????????";<2535...@qq.com>;
Date:  Mon, Dec 4, 2017 11:13 AM
To:  "user"<user@cassandra.apache.org>;

Subject:  update a record which does not exists



Dear All,If we update a record which actually does not exist in Cassandra,will 
it generate a new record or exit?


UPDATE columnfamily SET data = 'test data' WHERE key = 'row1';

as in CQL Update and insert are semantically the same.Could anyone please 
advise?


Thanks,
Peng Xiao

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