Hi,
We are using Cassandra 2.0.9 and we currently have "using timestamp" clause in 
all our update queries. We did this to fix occasional issues with ntp drift on 
AWS. We recently introduced conditional update in couple of our API and we 
realized that I can't have "using timestamp" and "if column1=?" in the same 
query.

com.datastax.driver.core.exceptions.InvalidQueryException: Cannot provide 
custom timestamp for conditional update

How do I achieve this if I want to override timestamp in a query with 
conditional update? Also, does anyone know the reason behind not supporting 
"using timestamp" for conditional update? I am trying to understand the 
problems this would cause.

Thanks
Praveen

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