How to retrieve data from cassandra

[Ashu Gupta]

I am working on cassandra 1.2.3 and using hector 1.1-3 When I fetch columns using SliceQuery, it returns me all the columns with the same datatype. Is there any way that QueryResult have object as the datatype of column values? If I use bytebuffer , So if I want to return multiple columns containing different data types(as a wrapper method over Hector), what data type do I return from my wrapper method?? I obviously won't know which column will have which data type & I can't return ByteBuffer as a generic column value type. Can anyone help me out with this?

[Nate McCall]

You will need to store a marker of some sort denoting the type either
on the column name of the column value. Using composites for this
would be a good idea. DynamicComposite would effectively give you this
for free, but they are slightly more complicated.

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[Ashu Gupta]

Thanx Nate

Is this the only way? because I have already ported my sql database to cassandra. Do I need to run the complete procedure again after storing that extra marker to denote the type? And suppose I have done that ,now how should I check that extra byte while retrieving rows?