Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/1848#discussion_r60071991
--- Diff:
flink-java/src/main/java/org/apache/flink/api/java/operators/PartitionOperator.java
---
@@ -98,6 +102,23 @@ public PartitionOperator(DataSet<T> input, Keys<T>
pKeys, Partitioner<?> customP
this.customPartitioner = customPartitioner;
this.distribution = distribution;
}
+
+ /**
+ * Sets the order of keys for range partitioning.
+ * NOTE: Only valid for {@link PartitionMethod.RANGE}.
+ *
+ * @param orders array of orders for each specified partition key
+ * @return The partitioneOperator with properly set orders for given
keys
+ */
+ @PublicEvolving
+ public PartitionOperator<T> withOrders(Order... orders) {
+ Preconditions.checkState(pMethod == PartitionMethod.RANGE,
"Orders cannot be applied for %s partition " +
+ "method", pMethod);
+
Preconditions.checkArgument(pKeys.getOriginalKeyFieldTypes().length ==
orders.length);
--- End diff --
Can you add a descriptive error message here?
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