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