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From "Tyler Hobbs (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-11310) Allow filtering on clustering columns for queries without secondary indexes
Date Wed, 16 Mar 2016 16:05:33 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-11310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15197574#comment-15197574
] 

Tyler Hobbs commented on CASSANDRA-11310:
-----------------------------------------

bq.  In processClusteringColumnsRestrictions the fact that we set useSecondaryIndex to true
if we allow filtering does not make sense. I am also not sure why we do it for views (Tyler
Hobbs is there a good reason?).

I think you're just asking me about views here, so I'll answer that.  The {{forView}} flag
here indicates that it's a internal query used to populate a view (or subsequently filter
individual rows).  We're more lenient about what we'll accept for these internal queries,
because the normal performance implications don't really apply.

> Allow filtering on clustering columns for queries without secondary indexes
> ---------------------------------------------------------------------------
>
>                 Key: CASSANDRA-11310
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-11310
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: CQL
>            Reporter: Benjamin Lerer
>            Assignee: Alex Petrov
>              Labels: doc-impacting
>             Fix For: 3.x
>
>
> Since CASSANDRA-6377 queries without index filtering non-primary key columns are fully
supported.
> It makes sense to also support filtering on clustering-columns.
> {code}
> CREATE TABLE emp_table2 (
> empID int,
> firstname text,
> lastname text,
> b_mon text,
> b_day text,
> b_yr text,
> PRIMARY KEY (empID, b_yr, b_mon, b_day));
> SELECT b_mon,b_day,b_yr,firstname,lastname FROM emp_table2
> WHERE b_mon='oct' ALLOW FILTERING;
> {code}



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