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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