/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.datasketches.hive.quantiles;
import java.util.Comparator;
import org.apache.datasketches.ArrayOfStringsSerDe;
import org.apache.hadoop.hive.ql.exec.Description;
import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator;
@Description(name = "Union", value = "_FUNC_(sketch) - "
+ "Returns an ItemsSketch<String> in a serialized form as a binary blob."
+ " Input values must also be serialized sketches.")
@SuppressWarnings("javadoc")
public class UnionStringsSketchUDAF extends UnionItemsSketchUDAF<String> {
@Override
public GenericUDAFEvaluator createEvaluator() {
return new UnionStringsSketchEvaluator();
}
static class UnionStringsSketchEvaluator extends UnionEvaluator<String> {
UnionStringsSketchEvaluator() {
super(Comparator.naturalOrder(), new ArrayOfStringsSerDe());
}
}
}
