[jira] [Created] (FLINK-970) Implement a first(n) operator

Posted by Shang Yuanchun (Jira) on
URL: http://deprecated-apache-flink-mailing-list-archive.368.s1.nabble.com/jira-Created-FLINK-970-Implement-a-first-n-operator-tp687.html

Timo Walther created FLINK-970:
----------------------------------

             Summary: Implement a first(n) operator
                 Key: FLINK-970
                 URL: https://issues.apache.org/jira/browse/FLINK-970
             Project: Flink
          Issue Type: New Feature
            Reporter: Timo Walther
            Assignee: Timo Walther
            Priority: Minor


It is only syntactic sugar, but I had many cases where I just needed the first element  or the first 2 elements in a GroupReduce.

E.g. Instead of

{code:java}
.reduceGroup(new GroupReduceFunction<String, String>() {
                                        @Override
                                        public void reduce(Iterator<String> values, Collector<String> out) throws Exception {
                                                out.collect(values.next());
                                        }
                                })
{code}

{code:java}
.first()
{code}



--
This message was sent by Atlassian JIRA
(v6.2#6252)