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Posted to commits@cassandra.apache.org by "Sam Tunnicliffe (JIRA)" <ji...@apache.org> on 2019/01/07 11:46:00 UTC

[jira] [Created] (CASSANDRA-14956) Paged Range Slice queries with DISTINCT can drop rows from results

Sam Tunnicliffe created CASSANDRA-14956:
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             Summary: Paged Range Slice queries with DISTINCT can drop rows from results
                 Key: CASSANDRA-14956
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-14956
             Project: Cassandra
          Issue Type: Bug
          Components: CQL/Interpreter
            Reporter: Sam Tunnicliffe
            Assignee: Sam Tunnicliffe
             Fix For: 2.2.14


If we have a partition where the first CQL row is fully deleted (possibly via TTLs), and that partition happens to fall on the page boundary of a paged range query which is using SELECT DISTINCT, the next live partition *after* it is omitted from the result set. This is due to over fetching of the pages and a bug in trimming those pages where overlap occurs.

This does not affect 3.0+.



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