org.apache.pinot.tools.scan.query.DistinctCountFunction Maven / Gradle / Ivy
/**
* 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.pinot.tools.scan.query;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.Set;
import org.apache.pinot.spi.utils.Pair;
public class DistinctCountFunction extends AggregationFunc {
private static final String NAME = "distinctcount";
public DistinctCountFunction(ResultTable rows, String column) {
super(rows, column);
}
@Override
public ResultTable run() {
Set distinctSet = new HashSet<>();
for (ResultTable.Row row : _rows) {
Object object = row.get(_column, NAME);
if (object instanceof HashSet) {
Set existingSet = (HashSet) object;
distinctSet.addAll(existingSet);
} else {
String value = row.get(_column, NAME).toString();
if (!distinctSet.contains(value)) {
distinctSet.add(value);
}
}
}
ResultTable resultTable = new ResultTable(new ArrayList(), 1);
resultTable.add(0, distinctSet);
return resultTable;
}
}