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From "Aleksey Yeschenko (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-9181) Improve index versus secondary index selection
Date Sun, 05 Feb 2017 16:35:42 GMT


Aleksey Yeschenko updated CASSANDRA-9181:
    Fix Version/s:     (was: 3.x)

> Improve index versus secondary index selection
> ----------------------------------------------
>                 Key: CASSANDRA-9181
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Jeremy Hanna
>              Labels: 2i
> There is a special case for secondary indexes if you always supply the partition key.
 For example, if you have a family with ID "a456" which has 6 family members and I have a
secondary index on first name.  Currently, if I do a query like this "select * from families
where id = 'a456' and firstname = 'alowishus';" you can see from a query trace, that it will
first scan the entire cluster based on the firstname, then look for the key within that.
> If it's not terribly invasive, I think this would be a valid use case to narrow down
the results by key first.

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