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https://issues.apache.org/jira/browse/CASSANDRA-16431?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sam Tunnicliffe updated CASSANDRA-16431:
----------------------------------------
Reviewers: Sam Tunnicliffe
> Group By breaks range tombstone closer
> --------------------------------------
>
> Key: CASSANDRA-16431
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16431
> Project: Cassandra
> Issue Type: Bug
> Components: Consistency/Coordination
> Reporter: Alex Petrov
> Assignee: Alex Petrov
> Priority: Normal
>
> This is caused by the same piece of GROUP BY code that has caused
> CASSANDRA-16307: counting. Since we have to look one row ahead in order to
> “finish” the group, we’ll check out the next row but will return null to
> transformations (including RT closer one). RT Closer will not see the row
> and, since the iterator is considered done, it’ll complain that that’s not
> right.
> Similar result can be achieved without paging, but with LIMIT 1.
> Minimal repro:
> {code:java}
> try (Cluster cluster = init(builder().withNodes(1).start()))
> {
> cluster.schemaChange("CREATE TABLE
> distributed_test_keyspace.table_5 " +
> "(pk0 bigint,pk1 bigint,ck0 bigint,ck1
> bigint, PRIMARY KEY ((pk0,pk1), ck0, ck1)) " +
> "WITH CLUSTERING ORDER BY (ck0 ASC,ck1
> ASC);");
> long pk1 = 1;
> long pk2 = 1;
> cluster.coordinator(1).execute("DELETE FROM
> distributed_test_keyspace.table_5 USING TIMESTAMP 100000 WHERE pk0=? AND
> pk1=? AND ck0>?;", ConsistencyLevel.QUORUM, pk1, pk2, 2L);
> cluster.coordinator(1).execute("INSERT INTO
> distributed_test_keyspace.table_5 (pk0,pk1,ck0,ck1) VALUES (?,?,?,?) USING
> TIMESTAMP 100001;", ConsistencyLevel.QUORUM, pk1, pk2, 1L, 1L);
> cluster.coordinator(1).execute("INSERT INTO
> distributed_test_keyspace.table_5 (pk0,pk1,ck0,ck1) VALUES (?,?,?,?) USING
> TIMESTAMP 100001;", ConsistencyLevel.QUORUM, pk1, pk2, 3L, 1L);
> cluster.coordinator(1).executeWithPaging("SELECT pk0,pk1,ck0,ck1
> FROM distributed_test_keyspace.table_5 WHERE pk0=? AND pk1=? GROUP BY
> pk0,pk1,ck0;",
> ConsistencyLevel.QUORUM,
> 1,
> pk1, pk2);
> }
> {code}
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