Thanks for the reply. Isn't the addColumn(IColumn col) method in the writer private though? I know what to do now in order to construct a column with a TTL now. Thanks. On Sep 26, 2013 9:00 PM, "Aaron Morton" <aa...@thelastpickle.com> wrote:
> > org.apache.cassandra.thrift.Column column; // initialize this with name, > value, timestamp, TTL > This is the wrong object to use. > > one overload of addColumn() accepts IColumn which is from > org.apache.cassanda.db . The thrift classes are only use for the thrift API. > > > What is the difference between calling writer.addColumn() on the > column's name, value and timestamp, and writer.addExpiringColumn() on the > column's name, value, TTL, timestamp and expiration timestamp ? > They both add an column to the row. addExpiringColumn() adds an expiring > column, and addColumn adds a normal one. > > only addExpiringColumn accepts a TTL (in seconds) for the column. > > > > Does the former result in the column expiring still , in cassandra 1.2.x > (i.e. does setting the TTL on a Column object change the name or value in a > way so as to ensure the column will expire as required) ? > No. > An expiring column must be an ExpiringColumn column instance. > The base IColumn interface does not have a TTL, only expiring columns do. > > > If not , what is the TTL attribute used for in the Column object ? > The org.apache.cassandra.db.Column class does not have a TTL. > > Cheers > > > ----------------- > Aaron Morton > New Zealand > @aaronmorton > > Co-Founder & Principal Consultant > Apache Cassandra Consulting > http://www.thelastpickle.com > > On 26/09/2013, at 12:44 AM, Jayadev Jayaraman <jdisal...@gmail.com> wrote: > > > Can someone answer this doubt reg. SSTableSimpleWriter ? I'd asked about > this earlier but it probably missed. Apologies for repeating the question > (with minor additions) : > > > > """ > > Let's say I've initialized a SSTableSimpleWriter instance and a new > column with TTL set : > > > > org.apache.cassandra.io.sstable.SSTableSimpleWriter writer = new > SSTableSimpleWriter( ... /* params here */); > > org.apache.cassandra.thrift.Column column; // initialize this with name, > value, timestamp, TTL > > > > What is the difference between calling writer.addColumn() on the > column's name, value and timestamp, and writer.addExpiringColumn() on the > column's name, value, TTL, timestamp and expiration timestamp ? Does the > former result in the column expiring still , in cassandra 1.2.x (i.e. does > setting the TTL on a Column object change the name or value in a way so as > to ensure the column will expire as required) ? If not , what is the TTL > attribute used for in the Column object ? > > """ > > > > Thanks, > > Jayadev > > > > > > On Tue, Sep 24, 2013 at 2:48 PM, Jayadev Jayaraman <jdisal...@gmail.com> > wrote: > > Let's say I've initialized a SSTableSimpleWriter instance and a new > column with TTL set : > > > > SSTableSimpleWriter writer = new SSTableSimpleWriter( ... /* params here > */); > > Column column; > > > > What is the difference between calling writer.addColumn() on the > column's name and value, and writer.addExpiringColumn() on the column and > its TTL ? Does the former result in the column expiring still , in > cassandra 1.2.x ? Or does it not ? > > > > > > > >
