/**
* 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.hadoop.hive.ql.exec.vector;
import java.util.Arrays;
import junit.framework.Assert;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.ql.exec.vector.util.FakeVectorRowBatchFromObjectIterables;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.ql.plan.LimitDesc;
import org.junit.Test;
/**
* Unit test for the vectorized LIMIT operator.
*/
public class TestVectorLimitOperator {
@Test
public void testLimitLessThanBatchSize() throws HiveException {
validateVectorLimitOperator(2, 5, 2);
}
@Test
public void testLimitGreaterThanBatchSize() throws HiveException {
validateVectorLimitOperator(100, 3, 3);
}
@Test
public void testLimitWithZeroBatchSize() throws HiveException {
validateVectorLimitOperator(5, 0, 0);
}
private void validateVectorLimitOperator(int limit, int batchSize, int expectedBatchSize)
throws HiveException {
@SuppressWarnings("unchecked")
FakeVectorRowBatchFromObjectIterables frboi = new FakeVectorRowBatchFromObjectIterables(
batchSize,
new String[] {"tinyint", "double"},
Arrays.asList(new Object[] {1, 2, 3, 4}),
Arrays.asList(new Object[] {323.0, 34.5, null, 89.3}));
// Get next batch
VectorizedRowBatch vrb = frboi.produceNextBatch();
// Create limit desc with limit value
LimitDesc ld = new LimitDesc(limit);
VectorLimitOperator lo = new VectorLimitOperator(null, ld);
lo.initialize(new Configuration(), null);
// Process the batch
lo.processOp(vrb, 0);
// Verify batch size
Assert.assertEquals(vrb.size, expectedBatchSize);
}
}