Get the current value FROM Cassandra - Update USING TIMESTAMP?

Question

I create a simple table with timestamp how to insert on it the timestampvalue also i want to use the current valueoftimestamp to do UPDATE later !

I used this instruction:

UPDATE users SET   timestampid =  dateof(now())  WHERE id= userID  ;

got this value on my table:

2016-04-14 11:18:12+0200

now want to do UPDATE USING This value

 UPDATE users USING TIMESTAMP '2016-04-14 11:18:12+0200' SET   timestampid =  dateof(now())  WHERE id= userID  ;

Invalid null value of timestamp ?

How to get the current timestampValue from Cassandra when using:

Update USING TIMESTAMP valueoftimestamp

to check if there's Modification or not using timestamp.

Answer 1

you should specify TIMESTAMP input in microseconds like this:

USING TIMESTAMP 1460634494030