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Jonathan Ellis commented on CASSANDRA-7826:
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bq. complex data types (set and map) can (or should) be reasonably supported
only as values. This would also mean that nesting map inside of set (since set
elements are serialized into the cell path) would also not be supported
Agreed. (I wouldn't mind supporting *frozen* collections as map keys / set
elements, but it's not a priority for me either.)
> support non-frozen, nested collections
> --------------------------------------
>
> Key: CASSANDRA-7826
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7826
> Project: Cassandra
> Issue Type: Improvement
> Components: CQL
> Reporter: Tupshin Harper
> Assignee: Alex Petrov
> Labels: ponies
> Fix For: 3.x
>
>
> The inability to nest collections is one of the bigger data modelling
> limitations we have right now.
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