Timo Walther created FLINK-970:
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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}
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