[joseph gao]

Hi, All.

     Here is a strange problem, I'm using datasta java driver 3.0.0-beta1. In one of my client, I can't update a column which already has a value in cassandra. But in other of my client the same column could be updated. I'm curious about how does this happen?

     Could any one give me some suggestion, this is my code:

     PreparedStatement preparedStatement = getPreparedStatement(session, sql);

BoundStatement boundStatement = new BoundStatement(preparedStatement);

session.execute(boundStatement.bind(values.toArray()));

  sql : UPDATE xxx.xxx set columnA=?, columnB=? where id = ?;

values：someStringA,  someStringB, someUUID.

the columnA changed, but columnB not changed.  the difference is A is null and B is not before update. Thank you guys. 

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Joseph Gao

PhoneNum:15210513582

QQ: 409343351

[Olivier Michallat]

Hi,

How do you initially insert the row (before running the update)? This could be a timestamp ordering issue if you execute both queries in a short time. One way you could check is by selecting writeTime(columnA) and writeTime(columnB) from the row, normally it should be higher for columnA.

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Olivier Michallat

Driver & tools engineer, DataStax

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[Olivier Michallat]

Nevermind, I just saw your other thread.

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Olivier Michallat

Driver & tools engineer, DataStax