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Posted to dev@cassandra.apache.org by sridhar nemani <sr...@gmail.com> on 2016/10/07 21:19:49 UTC

Question regd CDC in cassandra 3.7+

Hi,



I am fairly new to Cassandra. I have a requirement to be able to read any
changes to tables, as in inserts deletes or updates from a given timestamp
onwards. I believe the new implementation of CDC should help me with this.
However, with CDC enabled, I want to know if there is yet a way to read the
data inserts,updates or deletes to a table through CQL. I do see
implementations of CommitLogReader. But, I want to know if it is possible
to read the changes using CQL. If yes, how?

Please advise.



Thank you,
Sridhar

Re: Question regd CDC in cassandra 3.7+

Posted by Sridhar Nemani <sr...@whamtech.com>.

Thanks for clarifying that. 
How can I use commitlogreader? Are there any examples for it? Does this mean I can only use through Java?

-Sridhar

> On Oct 8, 2016, at 3:17 AM, DuyHai Doan <do...@gmail.com> wrote:
> 
> You need to use the CommitLogReader, there is no way to access CDC data
> using CQL. I'm not even sure it will be possible one day
> 
> On Fri, Oct 7, 2016 at 11:19 PM, sridhar nemani <sr...@gmail.com>
> wrote:
> 
>> Hi,
>> 
>> 
>> 
>> I am fairly new to Cassandra. I have a requirement to be able to read any
>> changes to tables, as in inserts deletes or updates from a given timestamp
>> onwards. I believe the new implementation of CDC should help me with this.
>> However, with CDC enabled, I want to know if there is yet a way to read the
>> data inserts,updates or deletes to a table through CQL. I do see
>> implementations of CommitLogReader. But, I want to know if it is possible
>> to read the changes using CQL. If yes, how?
>> 
>> Please advise.
>> 
>> 
>> 
>> Thank you,
>> Sridhar
>>

Re: Question regd CDC in cassandra 3.7+

Posted by DuyHai Doan <do...@gmail.com>.

You need to use the CommitLogReader, there is no way to access CDC data
using CQL. I'm not even sure it will be possible one day

On Fri, Oct 7, 2016 at 11:19 PM, sridhar nemani <sr...@gmail.com>
wrote:

> Hi,
>
>
>
> I am fairly new to Cassandra. I have a requirement to be able to read any
> changes to tables, as in inserts deletes or updates from a given timestamp
> onwards. I believe the new implementation of CDC should help me with this.
> However, with CDC enabled, I want to know if there is yet a way to read the
> data inserts,updates or deletes to a table through CQL. I do see
> implementations of CommitLogReader. But, I want to know if it is possible
> to read the changes using CQL. If yes, how?
>
> Please advise.
>
>
>
> Thank you,
> Sridhar
>