[jira] [Updated] (CASSANDRA-15082) SASI SPARSE mode 5 limit

["Jeremy Hanna (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-15082?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jeremy Hanna updated CASSANDRA-15082:
-------------------------------------
    Component/s: Feature/SASI

> SASI SPARSE mode 5 limit
> ------------------------
>
>                 Key: CASSANDRA-15082
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-15082
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Feature/SASI
>            Reporter: Edward Capriolo
>            Priority: Normal
>
> I do not know what the "improvement" should be here, but I ran into this:
> [https://github.com/apache/cassandra/blob/cassandra-3.11/src/java/org/apache/cassandra/index/sasi/disk/OnDiskIndexBuilder.java#L585]
> Term '55.3' belongs to more than 5 keys in sparse mode, which is not allowed.
> The only reference I can find to the limit is here:
>  [http://www.doanduyhai.com/blog/?p=2058]
> Why is it 5? Could it be a variable? Could it be an option when creating the table? Why or why not?
> This seems awkward. A user can insert more then 5 rows into a table, and it "works". IE you can write and you can query that table getting more than 5 results, but the index will not flush to disk. It throws an IOException.
> Maybe I am misunderstanding, but this seems impossible to support, if users inserts the same value 5 times, the entire index will not flush to disk?



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