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Posted to commits@cassandra.apache.org by "Dmitry Petrashko (Issue Comment Edited) (JIRA)" <ji...@apache.org> on 2012/03/05 12:05:57 UTC
[jira] [Issue Comment Edited] (CASSANDRA-3994) Allow indexes for
comparisons other than equal
[ https://issues.apache.org/jira/browse/CASSANDRA-3994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13222269#comment-13222269 ]
Dmitry Petrashko edited comment on CASSANDRA-3994 at 3/5/12 11:04 AM:
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As of current trunk, get_range_slices uses ThriftValidation.validateKeyRange that uses validateFilterClauses.
It requires at least one EQ operation, especially it goes thought expressions applying
isIndexed |= (expression.op == IndexOperator.EQ) && indexedColumns.contains(expression.column_name);
Thus it requires at least one EQ operation. And marks requests with filters containing only > < comparisons on columns as invalid.
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.
was (Author: darkdimius):
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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