Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/905#discussion_r34626753
--- Diff: flink-java/src/main/java/org/apache/flink/api/java/DataSet.java
---
@@ -618,9 +620,9 @@ public long count() throws Exception {
}
/**
- * Returns a distinct set of a {@link Tuple} {@link DataSet} using all
fields of the tuple.
+ * Returns a distinct set of a {@link DataSet} using all fields of the
tuple.
* <p>
- * Note: This operator can only be applied to Tuple DataSets.
+ * If the input is a {@link Tuple} {@link DataSet}, uses all fields of
the tuple.
--- End diff --
Can you change this to "If the input is a composite type (Tuple or Pojo
type), distinct is performed on all fields and each field must be a key type."
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