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From "Krzysztof Zarzycki (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (CASSANDRA-7636) Data is not filtered out when using WHERE clause on cluster column on Column Family with row cache on.
Date Thu, 31 Jul 2014 08:23:40 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-7636?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14080640#comment-14080640
] 

Krzysztof Zarzycki edited comment on CASSANDRA-7636 at 7/31/14 8:23 AM:
------------------------------------------------------------------------

I confirm that the patch works! Thank you:)

Now I understand it has to go through review and then you'll add it to the new RC, right?


was (Author: zarzyk):
I confirm that the patch works! 

> Data is not filtered out when using WHERE clause on cluster column on Column Family with
row cache on.
> ------------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-7636
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7636
>             Project: Cassandra
>          Issue Type: Bug
>         Environment: Cassandra 2.1.0-rc4
>            Reporter: Krzysztof Zarzycki
>            Assignee: Marcus Eriksson
>             Fix For: 2.1.0
>
>         Attachments: 0001-actually-filter-the-cached-result.patch
>
>
> My pretty simplified case looks like the following:
> I create a table with partition and cluster column. I set key caching to NONE and row
caching to ALL.  
> When I'm running some SELECTs with WHERE clause filtering on cluster columns, the rows
sometimes are not getting filtered out. When? Probably when the row gets loaded to row cache
(By some previous query).
> Look at this scenario: 
> {code}
> cqlsh:xxx> create KEYSPACE test_keyspace WITH replication = {'class': 'SimpleStrategy',
'replication_factor': 1};
> cqlsh:xxx> use test_keyspace ;
> cqlsh:test_keyspace> CREATE TABLE test (p1 bigint, c1 int, PRIMARY KEY (p1, c1) )
 WITH caching = '{"keys":"NONE", "rows_per_partition":"ALL"}';
> cqlsh:test_keyspace> insert into test (p1, c1 ) values ( 123, 10);
> cqlsh:test_keyspace> select * from test where p1 = 123 and c1 > 10;
> (0 rows)
> cqlsh:test_keyspace> select * from test where p1 = 123 and c1 > 9;
>  p1  | c1
> -----+----
>  123 | 10
> (1 rows)
> cqlsh:test_keyspace> select * from test where p1 = 123 and c1 > 10;
>  p1  | c1
> -----+----
>  123 | 10
> (1 rows)
> {code}
> Running the same scenario, but with row cache turned OFF works fine. 
> The filtering on other (partition) columns runs fine. Only the clustering column is somewhat
malfunctioning. 



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