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/*
* 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.arrow.algorithm.sort;
import static org.apache.arrow.vector.complex.BaseRepeatedValueVector.OFFSET_WIDTH;
import static org.junit.Assert.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertTrue;
import org.apache.arrow.memory.BufferAllocator;
import org.apache.arrow.memory.RootAllocator;
import org.apache.arrow.vector.BigIntVector;
import org.apache.arrow.vector.IntVector;
import org.apache.arrow.vector.SmallIntVector;
import org.apache.arrow.vector.TinyIntVector;
import org.apache.arrow.vector.UInt1Vector;
import org.apache.arrow.vector.UInt2Vector;
import org.apache.arrow.vector.UInt4Vector;
import org.apache.arrow.vector.UInt8Vector;
import org.apache.arrow.vector.complex.ListVector;
import org.apache.arrow.vector.testing.ValueVectorDataPopulator;
import org.apache.arrow.vector.types.Types;
import org.apache.arrow.vector.types.pojo.ArrowType;
import org.apache.arrow.vector.types.pojo.FieldType;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
/**
* Test cases for {@link DefaultVectorComparators}.
*/
public class TestDefaultVectorComparator {
private BufferAllocator allocator;
@Before
public void prepare() {
allocator = new RootAllocator(1024 * 1024);
}
@After
public void shutdown() {
allocator.close();
}
private ListVector createListVector(int count) {
ListVector listVector = ListVector.empty("list vector", allocator);
Types.MinorType type = Types.MinorType.INT;
listVector.addOrGetVector(FieldType.nullable(type.getType()));
listVector.allocateNew();
IntVector dataVector = (IntVector) listVector.getDataVector();
for (int i = 0; i < count; i++) {
dataVector.set(i, i);
}
dataVector.setValueCount(count);
listVector.setNotNull(0);
listVector.getOffsetBuffer().setInt(0, 0);
listVector.getOffsetBuffer().setInt(OFFSET_WIDTH, count);
listVector.setLastSet(0);
listVector.setValueCount(1);
return listVector;
}
@Test
public void testCompareLists() {
try (ListVector listVector1 = createListVector(10);
ListVector listVector2 = createListVector(11)) {
VectorValueComparator<ListVector> comparator =
DefaultVectorComparators.createDefaultComparator(listVector1);
comparator.attachVectors(listVector1, listVector2);
// prefix is smaller
assertTrue(comparator.compare(0, 0) < 0);
}
try (ListVector listVector1 = createListVector(11);
ListVector listVector2 = createListVector(11)) {
((IntVector) listVector2.getDataVector()).set(10, 110);
VectorValueComparator<ListVector> comparator =
DefaultVectorComparators.createDefaultComparator(listVector1);
comparator.attachVectors(listVector1, listVector2);
// breaking tie by the last element
assertTrue(comparator.compare(0, 0) < 0);
}
try (ListVector listVector1 = createListVector(10);
ListVector listVector2 = createListVector(10)) {
VectorValueComparator<ListVector> comparator =
DefaultVectorComparators.createDefaultComparator(listVector1);
comparator.attachVectors(listVector1, listVector2);
// list vector elements equal
assertTrue(comparator.compare(0, 0) == 0);
}
}
@Test
public void testCopiedComparatorForLists() {
for (int i = 1; i < 10; i++) {
for (int j = 1; j < 10; j++) {
try (ListVector listVector1 = createListVector(10);
ListVector listVector2 = createListVector(11)) {
VectorValueComparator<ListVector> comparator =
DefaultVectorComparators.createDefaultComparator(listVector1);
comparator.attachVectors(listVector1, listVector2);
VectorValueComparator<ListVector> copyComparator = comparator.createNew();
copyComparator.attachVectors(listVector1, listVector2);
assertEquals(comparator.compare(0, 0), copyComparator.compare(0, 0));
}
}
}
}
@Test
public void testCompareUInt1() {
try (UInt1Vector vec = new UInt1Vector("", allocator)) {
vec.allocateNew(10);
vec.setValueCount(10);
vec.setNull(0);
vec.set(1, -2);
vec.set(2, -1);
vec.set(3, 0);
vec.set(4, 1);
vec.set(5, 2);
vec.set(6, -2);
vec.setNull(7);
vec.set(8, Byte.MAX_VALUE);
vec.set(9, Byte.MIN_VALUE);
VectorValueComparator<UInt1Vector> comparator =
DefaultVectorComparators.createDefaultComparator(vec);
comparator.attachVector(vec);
assertTrue(comparator.compare(0, 1) < 0);
assertTrue(comparator.compare(1, 2) < 0);
assertTrue(comparator.compare(1, 3) > 0);
assertTrue(comparator.compare(2, 5) > 0);
assertTrue(comparator.compare(4, 5) < 0);
assertTrue(comparator.compare(1, 6) == 0);
assertTrue(comparator.compare(0, 7) == 0);
assertTrue(comparator.compare(8, 9) < 0);
assertTrue(comparator.compare(4, 8) < 0);
assertTrue(comparator.compare(5, 9) < 0);
assertTrue(comparator.compare(2, 9) > 0);
}
}
@Test
public void testCompareUInt2() {
try (UInt2Vector vec = new UInt2Vector("", allocator)) {
vec.allocateNew(10);
ValueVectorDataPopulator.setVector(
vec, null, (char) -2, (char) -1, (char) 0, (char) 1, (char) 2, (char) -2, null,
'\u7FFF', // value for the max 16-byte signed integer
'\u8000' // value for the min 16-byte signed integer
);
VectorValueComparator<UInt2Vector> comparator =
DefaultVectorComparators.createDefaultComparator(vec);
comparator.attachVector(vec);
assertTrue(comparator.compare(0, 1) < 0);
assertTrue(comparator.compare(1, 2) < 0);
assertTrue(comparator.compare(1, 3) > 0);
assertTrue(comparator.compare(2, 5) > 0);
assertTrue(comparator.compare(4, 5) < 0);
assertTrue(comparator.compare(1, 6) == 0);
assertTrue(comparator.compare(0, 7) == 0);
assertTrue(comparator.compare(8, 9) < 0);
assertTrue(comparator.compare(4, 8) < 0);
assertTrue(comparator.compare(5, 9) < 0);
assertTrue(comparator.compare(2, 9) > 0);
}
}
@Test
public void testCompareUInt4() {
try (UInt4Vector vec = new UInt4Vector("", allocator)) {
vec.allocateNew(10);
vec.setValueCount(10);
vec.setNull(0);
vec.set(1, -2);
vec.set(2, -1);
vec.set(3, 0);
vec.set(4, 1);
vec.set(5, 2);
vec.set(6, -2);
vec.setNull(7);
vec.set(8, Integer.MAX_VALUE);
vec.set(9, Integer.MIN_VALUE);
VectorValueComparator<UInt4Vector> comparator =
DefaultVectorComparators.createDefaultComparator(vec);
comparator.attachVector(vec);
assertTrue(comparator.compare(0, 1) < 0);
assertTrue(comparator.compare(1, 2) < 0);
assertTrue(comparator.compare(1, 3) > 0);
assertTrue(comparator.compare(2, 5) > 0);
assertTrue(comparator.compare(4, 5) < 0);
assertTrue(comparator.compare(1, 6) == 0);
assertTrue(comparator.compare(0, 7) == 0);
assertTrue(comparator.compare(8, 9) < 0);
assertTrue(comparator.compare(4, 8) < 0);
assertTrue(comparator.compare(5, 9) < 0);
assertTrue(comparator.compare(2, 9) > 0);
}
}
@Test
public void testCompareUInt8() {
try (UInt8Vector vec = new UInt8Vector("", allocator)) {
vec.allocateNew(10);
vec.setValueCount(10);
vec.setNull(0);
vec.set(1, -2);
vec.set(2, -1);
vec.set(3, 0);
vec.set(4, 1);
vec.set(5, 2);
vec.set(6, -2);
vec.setNull(7);
vec.set(8, Long.MAX_VALUE);
vec.set(9, Long.MIN_VALUE);
VectorValueComparator<UInt8Vector> comparator =
DefaultVectorComparators.createDefaultComparator(vec);
comparator.attachVector(vec);
assertTrue(comparator.compare(0, 1) < 0);
assertTrue(comparator.compare(1, 2) < 0);
assertTrue(comparator.compare(1, 3) > 0);
assertTrue(comparator.compare(2, 5) > 0);
assertTrue(comparator.compare(4, 5) < 0);
assertTrue(comparator.compare(1, 6) == 0);
assertTrue(comparator.compare(0, 7) == 0);
assertTrue(comparator.compare(8, 9) < 0);
assertTrue(comparator.compare(4, 8) < 0);
assertTrue(comparator.compare(5, 9) < 0);
assertTrue(comparator.compare(2, 9) > 0);
}
}
@Test
public void testCompareLong() {
try (BigIntVector vec = new BigIntVector("", allocator)) {
vec.allocateNew(8);
ValueVectorDataPopulator.setVector(
vec, -1L, 0L, 1L, null, 1L, 5L, Long.MIN_VALUE + 1L, Long.MAX_VALUE);
VectorValueComparator<BigIntVector> comparator =
DefaultVectorComparators.createDefaultComparator(vec);
comparator.attachVector(vec);
assertTrue(comparator.compare(0, 1) < 0);
assertTrue(comparator.compare(0, 2) < 0);
assertTrue(comparator.compare(2, 1) > 0);
// test equality
assertTrue(comparator.compare(5, 5) == 0);
assertTrue(comparator.compare(2, 4) == 0);
// null first
assertTrue(comparator.compare(3, 4) < 0);
assertTrue(comparator.compare(5, 3) > 0);
// potential overflow
assertTrue(comparator.compare(6, 7) < 0);
assertTrue(comparator.compare(7, 6) > 0);
assertTrue(comparator.compare(7, 7) == 0);
}
}
@Test
public void testCompareInt() {
try (IntVector vec = new IntVector("", allocator)) {
vec.allocateNew(8);
ValueVectorDataPopulator.setVector(
vec, -1, 0, 1, null, 1, 5, Integer.MIN_VALUE + 1, Integer.MAX_VALUE);
VectorValueComparator<IntVector> comparator =
DefaultVectorComparators.createDefaultComparator(vec);
comparator.attachVector(vec);
assertTrue(comparator.compare(0, 1) < 0);
assertTrue(comparator.compare(0, 2) < 0);
assertTrue(comparator.compare(2, 1) > 0);
// test equality
assertTrue(comparator.compare(5, 5) == 0);
assertTrue(comparator.compare(2, 4) == 0);
// null first
assertTrue(comparator.compare(3, 4) < 0);
assertTrue(comparator.compare(5, 3) > 0);
// potential overflow
assertTrue(comparator.compare(6, 7) < 0);
assertTrue(comparator.compare(7, 6) > 0);
assertTrue(comparator.compare(7, 7) == 0);
}
}
@Test
public void testCompareShort() {
try (SmallIntVector vec = new SmallIntVector("", allocator)) {
vec.allocateNew(8);
ValueVectorDataPopulator.setVector(
vec, (short) -1, (short) 0, (short) 1, null, (short) 1, (short) 5,
(short) (Short.MIN_VALUE + 1), Short.MAX_VALUE);
VectorValueComparator<SmallIntVector> comparator =
DefaultVectorComparators.createDefaultComparator(vec);
comparator.attachVector(vec);
assertTrue(comparator.compare(0, 1) < 0);
assertTrue(comparator.compare(0, 2) < 0);
assertTrue(comparator.compare(2, 1) > 0);
// test equality
assertTrue(comparator.compare(5, 5) == 0);
assertTrue(comparator.compare(2, 4) == 0);
// null first
assertTrue(comparator.compare(3, 4) < 0);
assertTrue(comparator.compare(5, 3) > 0);
// potential overflow
assertTrue(comparator.compare(6, 7) < 0);
assertTrue(comparator.compare(7, 6) > 0);
assertTrue(comparator.compare(7, 7) == 0);
}
}
@Test
public void testCompareByte() {
try (TinyIntVector vec = new TinyIntVector("", allocator)) {
vec.allocateNew(8);
ValueVectorDataPopulator.setVector(
vec, (byte) -1, (byte) 0, (byte) 1, null, (byte) 1, (byte) 5,
(byte) (Byte.MIN_VALUE + 1), Byte.MAX_VALUE);
VectorValueComparator<TinyIntVector> comparator =
DefaultVectorComparators.createDefaultComparator(vec);
comparator.attachVector(vec);
assertTrue(comparator.compare(0, 1) < 0);
assertTrue(comparator.compare(0, 2) < 0);
assertTrue(comparator.compare(2, 1) > 0);
// test equality
assertTrue(comparator.compare(5, 5) == 0);
assertTrue(comparator.compare(2, 4) == 0);
// null first
assertTrue(comparator.compare(3, 4) < 0);
assertTrue(comparator.compare(5, 3) > 0);
// potential overflow
assertTrue(comparator.compare(6, 7) < 0);
assertTrue(comparator.compare(7, 6) > 0);
assertTrue(comparator.compare(7, 7) == 0);
}
}
@Test
public void testCheckNullsOnCompareIsFalseForNonNullableVector() {
try (IntVector vec = new IntVector("not nullable",
FieldType.notNullable(new ArrowType.Int(32, false)), allocator)) {
ValueVectorDataPopulator.setVector(vec, 1, 2, 3, 4);
final VectorValueComparator<IntVector> comparator = DefaultVectorComparators.createDefaultComparator(vec);
comparator.attachVector(vec);
assertFalse(comparator.checkNullsOnCompare());
}
}
@Test
public void testCheckNullsOnCompareIsTrueForNullableVector() {
try (IntVector vec = new IntVector("nullable", FieldType.nullable(
new ArrowType.Int(32, false)), allocator);
IntVector vec2 = new IntVector("not-nullable", FieldType.notNullable(
new ArrowType.Int(32, false)), allocator)
) {
ValueVectorDataPopulator.setVector(vec, 1, null, 3, 4);
ValueVectorDataPopulator.setVector(vec2, 1, 2, 3, 4);
final VectorValueComparator<IntVector> comparator = DefaultVectorComparators.createDefaultComparator(vec);
comparator.attachVector(vec);
assertTrue(comparator.checkNullsOnCompare());
comparator.attachVectors(vec, vec2);
assertTrue(comparator.checkNullsOnCompare());
}
}
@Test
public void testCheckNullsOnCompareIsFalseWithNoNulls() {
try (IntVector vec = new IntVector("nullable", FieldType.nullable(
new ArrowType.Int(32, false)), allocator);
IntVector vec2 = new IntVector("also-nullable", FieldType.nullable(
new ArrowType.Int(32, false)), allocator)
) {
// no null values
ValueVectorDataPopulator.setVector(vec, 1, 2, 3, 4);
ValueVectorDataPopulator.setVector(vec2, 1, 2, 3, 4);
final VectorValueComparator<IntVector> comparator = DefaultVectorComparators.createDefaultComparator(vec);
comparator.attachVector(vec);
assertFalse(comparator.checkNullsOnCompare());
comparator.attachVectors(vec, vec2);
assertFalse(comparator.checkNullsOnCompare());
}
}
@Test
public void testCheckNullsOnCompareIsTrueWithEmptyVectors() {
try (IntVector vec = new IntVector("nullable", FieldType.nullable(
new ArrowType.Int(32, false)), allocator);
IntVector vec2 = new IntVector("also-nullable", FieldType.nullable(
new ArrowType.Int(32, false)), allocator)
) {
final VectorValueComparator<IntVector> comparator = DefaultVectorComparators.createDefaultComparator(vec);
comparator.attachVector(vec2);
assertTrue(comparator.checkNullsOnCompare());
comparator.attachVectors(vec, vec2);
assertTrue(comparator.checkNullsOnCompare());
}
}
}