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https://issues.apache.org/jira/browse/CASSANDRA-21070?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18083111#comment-18083111
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Pranav Shenoy commented on CASSANDRA-21070:
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Update: Made changes to store and search prefixes queries via SAI in SSTable.
[https://github.com/apache/cassandra/compare/trunk...pranavshenoy:cassandra:sai-prefix]
This will need more refining. will continue working on this
> Prefix queries on SSTable-attached index
> ----------------------------------------
>
> Key: CASSANDRA-21070
> URL: https://issues.apache.org/jira/browse/CASSANDRA-21070
> Project: Apache Cassandra
> Issue Type: Improvement
> Components: Feature/SAI
> Reporter: Caleb Rackliffe
> Assignee: Pranav Shenoy
> Priority: Normal
>
> If the current on-disk trie supports payloads on internal nodes of the trie,
> we may be able to support prefix queries reasonably efficiently. However,
> given that would not give us perfect coverage of the postings space, we
> should probably still start by building a "slow" version of this that just
> gathers and sorts matches from leaf nodes.
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