Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/2169#discussion_r69043528
--- Diff: flink-java/src/main/java/org/apache/flink/api/java/DataSet.java
---
@@ -1193,21 +1196,46 @@ public long count() throws Exception {
operation.setInput(this);
return operation.createResult();
}
-
+
//
--------------------------------------------------------------------------------------------
// Union
//
--------------------------------------------------------------------------------------------
/**
* Creates a union of this DataSet with an other DataSet. The other
DataSet must be of the same data type.
- *
+ *
* @param other The other DataSet which is unioned with the current
DataSet.
* @return The resulting DataSet.
*/
public UnionOperator<T> union(DataSet<T> other){
return new UnionOperator<>(this, other,
Utils.getCallLocationName());
}
+ /**
+ * Creates a set minus of this DataSet with an other DataSet. The other
DataSet must be of the same data type.
+ *
+ * @param other The other DataSet which is set minus with the current
DataSet.
+ * @return The resulting DataSet.
+ */
+ public CoGroupOperator<T, T, T> minus(DataSet<T> other){
--- End diff --
This issue is about adding `EXCEPT` to the Table. The DataSet API which is
touched here is a rather low level API and we are quite careful about adding
new operators. Therefore, changes to the DataSet API should go through a
separate JIRA issue. Please move this code to `DataSetMinus` class and revert
the changes to this file. You can open a JIRA issue to discuss adding a `minus`
operator to the DataSet API. Thank you.
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