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From "Hudson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-2717) duplicate rows returned from SELECT where KEY term is duplicated
Date Tue, 19 Jul 2011 18:04:59 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2717?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13067869#comment-13067869
] 

Hudson commented on CASSANDRA-2717:
-----------------------------------

Integrated in Cassandra-0.8 #224 (See [https://builds.apache.org/job/Cassandra-0.8/224/])
    CQL: include only one row per unique keyfor IN queries
patch by Jim Ancona; reviewed by pyaskevich for CASSANDRA-2717

jbellis : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1148425
Files : 
* /cassandra/branches/cassandra-0.8/test/system/test_cql.py
* /cassandra/branches/cassandra-0.8/CHANGES.txt
* /cassandra/branches/cassandra-0.8/src/java/org/apache/cassandra/cql/Term.java
* /cassandra/branches/cassandra-0.8/src/java/org/apache/cassandra/cql/QueryProcessor.java
* /cassandra/branches/cassandra-0.8/src/java/org/apache/cassandra/cql/Cql.g
* /cassandra/branches/cassandra-0.8/src/java/org/apache/cassandra/cql/WhereClause.java
* /cassandra/branches/cassandra-0.8/src/java/org/apache/cassandra/cql/SelectStatement.java


> duplicate rows returned from SELECT where KEY term is duplicated
> ----------------------------------------------------------------
>
>                 Key: CASSANDRA-2717
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2717
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 0.8.0 beta 2
>            Reporter: Aaron Morton
>            Assignee: Jim Ancona
>            Priority: Minor
>              Labels: cql, lhf
>             Fix For: 0.8.2
>
>         Attachments: v1-0001-CASSANDRA-2717-Prevent-multiple-KEY-terms-properly-han.txt,
v2-0001-CASSANDRA-2717-Prevent-multiple-KEY-terms-properly-han.txt, v2-0002-Set-multiKey-state-from-within-grammar.txt
>
>
> Noticed while working on CASSANDRA-2268 when random keys generated during a mutli_get
test contain duplicate keys. 
> The thrift multiget_slice() returns only the unique rows because of the map generated
for the result. 
> CQL will return a row for each KEY term in the SELECT. 
> I could make QueryProcessor.getSlice() only create commands for the unique keys if we
wanted to. 
> Not sure it's a bug and it's definitely not something that should come up to often, reporting
it because it's different to the thrift mutli_get operation. 
> Happy to close if it's by design. 

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