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From "Dmitry Petrashko (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-3994) Allow indexes for comparisons other than equal
Date Mon, 05 Mar 2012 11:00:03 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13222269#comment-13222269
] 

Dmitry Petrashko commented on CASSANDRA-3994:
---------------------------------------------

Yes, but it allows only equals filter.
It uses ThriftValidation.validateFilterClauses that requires at least one EQ operation
isIndexed |= (expression.op == IndexOperator.EQ) && indexedColumns.contains(expression.column_name);

Currently we've developed index that can efficiently work with LT GT operations, this patch
provides support for requests with filters that use index on operations other than equals.
                
> Allow indexes for comparisons other than equal
> ----------------------------------------------
>
>                 Key: CASSANDRA-3994
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3994
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Dmitry Petrashko
>         Attachments: Validation_fix_for_filters_other_than_EQuals.patch
>
>
> As for now, validation marks filters with operations other than equal as invalid.
> This is also gives initial support for indexes other than KEYS

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