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Posted to derby-dev@db.apache.org by "Rick Hillegas (JIRA)" <ji...@apache.org> on 2013/11/04 14:32:21 UTC

[jira] [Created] (DERBY-6402) Investigate using the Java 8 java.util.stream.Collector interface for user-defined aggregates

Rick Hillegas created DERBY-6402:
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             Summary: Investigate using the Java 8 java.util.stream.Collector interface for user-defined aggregates
                 Key: DERBY-6402
                 URL: https://issues.apache.org/jira/browse/DERBY-6402
             Project: Derby
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 10.11.0.0
            Reporter: Rick Hillegas


Java 8 introduces a parallel aggregation interface: http://download.java.net/jdk8/docs/api/java/util/stream/Collector.html. We should investigate how we can use this interface to help developers write user-defined aggregates. It may also help us improve the throughput of Derby aggregation in general.



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