Nested queries

[Liam Fisk]

Hi,
I'm wrapping my head around Calcite at the moment - was wondering if somebody 
could clarify something for me.
I've got serialised javabeans in a cassandra DB - can I use the pushdown 
feature to query the cassandra indices first, find a subset of relevant java 
beans, deserialise them, and then query the java bean fields?
Cheers,
Liam