[jira] [Assigned] (CASSANDRA-6748) If null is explicitly set to a column, paging_state will not work

["Sylvain Lebresne (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-6748?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sylvain Lebresne reassigned CASSANDRA-6748:
-------------------------------------------

    Assignee: Sylvain Lebresne

> If null is explicitly set to a column, paging_state will not work
> -----------------------------------------------------------------
>
>                 Key: CASSANDRA-6748
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6748
>             Project: Cassandra
>          Issue Type: Bug
>         Environment: Cassandra 2.0.5
> Ubuntu 12.04
>            Reporter: Katsutoshi Nagaoka
>            Assignee: Sylvain Lebresne
>
> If null is explicitly set to a column, paging_state will not work. My test procedure is as follows:
> ------
> Create a table and insert 10 records using cqlsh. The query is as follows:
> {code}
> CREATE TABLE mytable (id int, range int, value text, PRIMARY KEY (id, range));
> INSERT INTO mytable (id, range) VALUES (0, 0);
> INSERT INTO mytable (id, range) VALUES (0, 1);
> INSERT INTO mytable (id, range) VALUES (0, 2);
> INSERT INTO mytable (id, range) VALUES (0, 3);
> INSERT INTO mytable (id, range) VALUES (0, 4);
> INSERT INTO mytable (id, range, value) VALUES (0, 5, null);
> INSERT INTO mytable (id, range, value) VALUES (0, 6, null);
> INSERT INTO mytable (id, range, value) VALUES (0, 7, null);
> INSERT INTO mytable (id, range, value) VALUES (0, 8, null);
> INSERT INTO mytable (id, range, value) VALUES (0, 9, null);
> {code}
> Select 10 records using datastax driver. The pseudocode is as follows:
> {code}
> Statement statement = QueryBuilder.select().from("mytable").setFetchSize(1);
> ResultSet rs = session.execute(statement);
> for(Row row : rs){
>     System.out.println(String.format("id=%d, range=%d, value=%s",
>         row.getInt("id"), row.getInt("range"), row.getString("value")));
> }
> {code}
> The result is as follows:
> {code}
> id=0, range=0, value=null
> id=0, range=1, value=null
> id=0, range=2, value=null
> id=0, range=3, value=null
> id=0, range=4, value=null
> id=0, range=5, value=null
> id=0, range=7, value=null
> id=0, range=9, value=null
> {code}
> ------
> Result is 8 records although 10 records were expected. I originally raised this issue in the mailing lists: http://www.mail-archive.com/user@cassandra.apache.org/msg34752.html



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