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https://issues.apache.org/jira/browse/CASSANDRA-6706?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14141266#comment-14141266
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Philip Thompson commented on CASSANDRA-6706:
--------------------------------------------
IRC discussion shows a desire to fix this in 3.0, but not in any minor releases.
> Duplicate rows returned when in clause has repeated values
> ----------------------------------------------------------
>
> Key: CASSANDRA-6706
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6706
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Environment: Found on
> [cqlsh 4.1.0 | Cassandra 2.0.3-SNAPSHOT | CQL spec 3.0.0 | Thrift protocol
> 19.38.0]
> Reporter: Gavin Casey
> Labels: cql
> Fix For: 3.0
>
>
> If a value is repeated within an IN clause then repeated rows are returned
> for the repeats:
> cqlsh> create table t1(c1 text primary key);
> cqlsh> insert into t1(c1) values ('A');
> cqlsh> select * from t1;
> c1
> ----
> A
> cqlsh> select * from t1 where c1 = 'A';
> c1
> ----
> A
> cqlsh> select * from t1 where c1 in( 'A');
> c1
> ----
> A
> cqlsh:dslog> select * from t1 where c1 in( 'A','A');
> c1
> ----
> A
> A
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