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https://issues.apache.org/jira/browse/CASSANDRA-3249?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis updated CASSANDRA-3249:
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Fix Version/s: (was: 1.1)
> Index search in provided set of rows (support of sub query)
> -----------------------------------------------------------
>
> Key: CASSANDRA-3249
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3249
> Project: Cassandra
> Issue Type: New Feature
> Components: API, Core
> Affects Versions: 0.8.6
> Reporter: Evgeny Ryabitskiy
> Attachments: CASSANDRA-3249-draft1.patch
>
>
> This issue is related to discussion on mailing list:
> http://www.mail-archive.com/[email protected]/msg17135.html
> Idea is to support Cassandra build-in index search over specified set of rows.
> From API view:
> It can be extension of get_indexed_slices, for example:
> {quote}
> List<byte[]> rowKys = ... ; //list of row keys
> IndexClause indexClause = new IndexClause();
> indexClause.setKeys(keys); //required API to set list of keys
> indexClause.setExpressions(someFilteringExpressions);
> List finalResult = get_indexed_slices(colParent, indexClause, colPredicate,
> cLevel);
> {quote}
> or create specified API method.
> From conceptual view it was noticed:
> That would be implementation of sub query.
> {quote}
> The index clause is applied to the set of all rows in the database, not a sub
> set, applying them to a sub set is implicitly supporting a sub query
> {quote}
> Benefits of this feature is that search can be split in 2 stages:
> 1) Search over external engine (for example full text search)
> 2) Cassandra build-in index search over result from first stage
> This combination could solve most of limitations that came with solution
> based only on external search engine.
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