Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/1585#discussion_r52099909
--- Diff:
flink-java/src/main/java/org/apache/flink/api/java/operators/SortPartitionOperator.java
---
@@ -79,16 +112,33 @@ public SortPartitionOperator(DataSet<T> dataSet,
String sortField, Order sortOrd
* local partition sorting of the DataSet.
*
* @param field The field expression referring to the field of the
additional sort order of
- * the local partition sorting.
- * @param order The order of the additional sort order of the local
partition sorting.
+ * the local partition sorting.
+ * @param order The order of the additional sort order of the local
partition sorting.
* @return The DataSet with sorted local partitions.
*/
public SortPartitionOperator<T> sortPartition(String field, Order
order) {
+ if (useKeySelector) {
+ throw new InvalidProgramException("Expression keys
cannot be appended after selector function keys");
+ }
+
int[] flatOrderKeys = getFlatFields(field);
this.appendSorting(flatOrderKeys, order);
return this;
}
+ /**
+ * Appends an additional sort order with the specified field in the
specified order to the
+ * local partition sorting of the DataSet.
+ *
+ * @param keyExtractor The KeySelector function which extracts the key
value of the additional
+ * sort order of the local partition sorting.
+ * @param order The order of the additional sort order of the
local partition sorting.
+ * @return The DataSet with sorted local partitions.
+ */
+ public <K> SortPartitionOperator<T> sortPartition(KeySelector<T, K>
keyExtractor, Order order) {
--- End diff --
Oh yes, you are right!
Can you update the JavaDocs of this method and explain that chaining is not
possible and how to work around it?
Thanks
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