Define precisely what you mean by "high cardinality columns". Do you mean:

1) a single indexed value is present in a lot of rows
2) a single indexed value has only a few (if not just one) matching row

On Sat, Oct 15, 2016 at 8:37 AM, Kant Kodali <> wrote:

> I understand Secondary Indexes in general are inefficient on high
> cardinality columns but since SASI is built from scratch I wonder if the
> same argument applies there? If not, Why? Because I believe primary keys in
> Cassandra are indeed indexed and since Primary key is supposed to be the
> column with highest cardinality why not do the same for secondary indexes?

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