/*
* Licensed 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 com.facebook.presto.operator.scalar;
import com.facebook.presto.metadata.FunctionKind;
import com.facebook.presto.metadata.MetadataManager;
import com.facebook.presto.metadata.Signature;
import com.facebook.presto.operator.aggregation.TypedSet;
import com.facebook.presto.operator.project.PageProcessor;
import com.facebook.presto.spi.Page;
import com.facebook.presto.spi.block.Block;
import com.facebook.presto.spi.block.BlockBuilder;
import com.facebook.presto.spi.block.BlockBuilderStatus;
import com.facebook.presto.spi.function.ScalarFunction;
import com.facebook.presto.spi.function.SqlType;
import com.facebook.presto.spi.type.Type;
import com.facebook.presto.sql.gen.ExpressionCompiler;
import com.facebook.presto.sql.relational.CallExpression;
import com.facebook.presto.sql.relational.RowExpression;
import com.facebook.presto.type.ArrayType;
import com.google.common.base.Verify;
import com.google.common.collect.ImmutableList;
import io.airlift.slice.Slices;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OperationsPerInvocation;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.Warmup;
import org.openjdk.jmh.runner.Runner;
import org.openjdk.jmh.runner.options.Options;
import org.openjdk.jmh.runner.options.OptionsBuilder;
import org.openjdk.jmh.runner.options.VerboseMode;
import java.util.List;
import java.util.Optional;
import java.util.concurrent.ThreadLocalRandom;
import java.util.concurrent.TimeUnit;
import static com.facebook.presto.metadata.FunctionExtractor.extractFunctions;
import static com.facebook.presto.spi.type.VarcharType.VARCHAR;
import static com.facebook.presto.sql.relational.Expressions.field;
import static com.facebook.presto.testing.TestingConnectorSession.SESSION;
@SuppressWarnings("MethodMayBeStatic")
@State(Scope.Thread)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@Fork(2)
@Warmup(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
@BenchmarkMode(Mode.AverageTime)
public class BenchmarkArrayDistinct
{
private static final int POSITIONS = 100_000;
private static final int ARRAY_SIZE = 2;
private static final int NUM_TYPES = 1;
private static final List<Type> TYPES = ImmutableList.of(VARCHAR);
static {
Verify.verify(NUM_TYPES == TYPES.size());
}
@Benchmark
@OperationsPerInvocation(POSITIONS * ARRAY_SIZE * NUM_TYPES)
public List<Page> arrayDistinct(BenchmarkData data)
throws Throwable
{
return ImmutableList.copyOf(data.getPageProcessor().process(SESSION, data.getPage()));
}
@SuppressWarnings("FieldMayBeFinal")
@State(Scope.Thread)
public static class BenchmarkData
{
@Param({"array_distinct", "old_array_distinct"})
private String name = "array_distinct";
private Page page;
private PageProcessor pageProcessor;
@Setup
public void setup()
{
MetadataManager metadata = MetadataManager.createTestMetadataManager();
metadata.addFunctions(extractFunctions(BenchmarkArrayDistinct.class));
ExpressionCompiler compiler = new ExpressionCompiler(metadata);
ImmutableList.Builder<RowExpression> projectionsBuilder = ImmutableList.builder();
Block[] blocks = new Block[TYPES.size()];
for (int i = 0; i < TYPES.size(); i++) {
Type elementType = TYPES.get(i);
ArrayType arrayType = new ArrayType(elementType);
Signature signature = new Signature(name, FunctionKind.SCALAR, arrayType.getTypeSignature(), arrayType.getTypeSignature());
projectionsBuilder.add(new CallExpression(signature, arrayType, ImmutableList.of(field(i, arrayType))));
blocks[i] = createChannel(POSITIONS, ARRAY_SIZE, arrayType);
}
ImmutableList<RowExpression> projections = projectionsBuilder.build();
pageProcessor = compiler.compilePageProcessor(Optional.empty(), projections).get();
page = new Page(blocks);
}
private static Block createChannel(int positionCount, int arraySize, ArrayType arrayType)
{
BlockBuilder blockBuilder = arrayType.createBlockBuilder(new BlockBuilderStatus(), positionCount);
for (int position = 0; position < positionCount; position++) {
BlockBuilder entryBuilder = blockBuilder.beginBlockEntry();
for (int i = 0; i < arraySize; i++) {
if (arrayType.getElementType().getJavaType() == long.class) {
arrayType.getElementType().writeLong(entryBuilder, ThreadLocalRandom.current().nextLong());
}
else if (arrayType.getElementType().equals(VARCHAR)) {
arrayType.getElementType().writeSlice(entryBuilder, Slices.utf8Slice("test_string"));
}
else {
throw new UnsupportedOperationException();
}
}
blockBuilder.closeEntry();
}
return blockBuilder.build();
}
public PageProcessor getPageProcessor()
{
return pageProcessor;
}
public Page getPage()
{
return page;
}
}
public static void main(String[] args)
throws Throwable
{
// assure the benchmarks are valid before running
BenchmarkData data = new BenchmarkData();
data.setup();
new BenchmarkArrayDistinct().arrayDistinct(data);
Options options = new OptionsBuilder()
.verbosity(VerboseMode.NORMAL)
.include(".*" + BenchmarkArrayDistinct.class.getSimpleName() + ".*")
.build();
new Runner(options).run();
}
@ScalarFunction
@SqlType("array(varchar)")
public static Block oldArrayDistinct(@SqlType("array(varchar)") Block array)
{
if (array.getPositionCount() == 0) {
return array;
}
TypedSet typedSet = new TypedSet(VARCHAR, array.getPositionCount());
BlockBuilder distinctElementBlockBuilder = VARCHAR.createBlockBuilder(new BlockBuilderStatus(), array.getPositionCount());
for (int i = 0; i < array.getPositionCount(); i++) {
if (!typedSet.contains(array, i)) {
typedSet.add(array, i);
VARCHAR.appendTo(array, i, distinctElementBlockBuilder);
}
}
return distinctElementBlockBuilder.build();
}
}