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* Add "like" filter. * Addressed some PR comments. * Slight simplifications to LikeFilter. * Additional simplifications. * Fix comment in LikeFilter. * Clarify comment in LikeFilter. * Simplify LikeMatcher a bit. * No use going through the optimized path if prefix is empty. * Add more tests.
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benchmarks/src/main/java/io/druid/benchmark/LikeFilterBenchmark.java
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| /* | ||
| * Licensed to Metamarkets Group Inc. (Metamarkets) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. Metamarkets 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 io.druid.benchmark; | ||
|
|
||
| import com.google.common.base.Function; | ||
| import com.google.common.collect.FluentIterable; | ||
| import com.metamx.collections.bitmap.BitmapFactory; | ||
| import com.metamx.collections.bitmap.ImmutableBitmap; | ||
| import com.metamx.collections.bitmap.MutableBitmap; | ||
| import com.metamx.collections.bitmap.RoaringBitmapFactory; | ||
| import com.metamx.collections.spatial.ImmutableRTree; | ||
| import io.druid.query.filter.BitmapIndexSelector; | ||
| import io.druid.query.filter.BoundDimFilter; | ||
| import io.druid.query.filter.Filter; | ||
| import io.druid.query.filter.LikeDimFilter; | ||
| import io.druid.query.filter.RegexDimFilter; | ||
| import io.druid.query.filter.SelectorDimFilter; | ||
| import io.druid.query.ordering.StringComparators; | ||
| import io.druid.segment.column.BitmapIndex; | ||
| import io.druid.segment.data.BitmapSerdeFactory; | ||
| import io.druid.segment.data.GenericIndexed; | ||
| import io.druid.segment.data.Indexed; | ||
| import io.druid.segment.data.RoaringBitmapSerdeFactory; | ||
| import io.druid.segment.serde.BitmapIndexColumnPartSupplier; | ||
| 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.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.infra.Blackhole; | ||
|
|
||
| import java.io.IOException; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.concurrent.TimeUnit; | ||
|
|
||
| @State(Scope.Benchmark) | ||
| @Fork(value = 1) | ||
| @Warmup(iterations = 10) | ||
| @Measurement(iterations = 10) | ||
| public class LikeFilterBenchmark | ||
| { | ||
| private static final int START_INT = 1_000_000; | ||
| private static final int END_INT = 9_999_999; | ||
|
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| private static final Filter SELECTOR_EQUALS = new SelectorDimFilter( | ||
| "foo", | ||
| "1000000", | ||
| null | ||
| ).toFilter(); | ||
|
|
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| private static final Filter LIKE_EQUALS = new LikeDimFilter( | ||
| "foo", | ||
| "1000000", | ||
| null, | ||
| null | ||
| ).toFilter(); | ||
|
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| private static final Filter BOUND_PREFIX = new BoundDimFilter( | ||
| "foo", | ||
| "50", | ||
| "50\uffff", | ||
| false, | ||
| false, | ||
| null, | ||
| null, | ||
| StringComparators.LEXICOGRAPHIC | ||
| ).toFilter(); | ||
|
|
||
| private static final Filter REGEX_PREFIX = new RegexDimFilter( | ||
| "foo", | ||
| "^50.*", | ||
| null | ||
| ).toFilter(); | ||
|
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| private static final Filter LIKE_PREFIX = new LikeDimFilter( | ||
| "foo", | ||
| "50%", | ||
| null, | ||
| null | ||
| ).toFilter(); | ||
|
|
||
| // cardinality, the dictionary will contain evenly spaced integers | ||
| @Param({"1000", "100000", "1000000"}) | ||
| int cardinality; | ||
|
|
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| int step; | ||
|
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| // selector will contain a cardinality number of bitmaps; each one contains a single int: 0 | ||
| BitmapIndexSelector selector; | ||
|
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||
| @Setup | ||
| public void setup() throws IOException | ||
| { | ||
| step = (END_INT - START_INT) / cardinality; | ||
| final BitmapFactory bitmapFactory = new RoaringBitmapFactory(); | ||
| final BitmapSerdeFactory serdeFactory = new RoaringBitmapSerdeFactory(null); | ||
| final List<Integer> ints = generateInts(); | ||
| final GenericIndexed<String> dictionary = GenericIndexed.fromIterable( | ||
| FluentIterable.from(ints) | ||
| .transform( | ||
| new Function<Integer, String>() | ||
| { | ||
| @Override | ||
| public String apply(Integer i) | ||
| { | ||
| return i.toString(); | ||
| } | ||
| } | ||
| ), | ||
| GenericIndexed.STRING_STRATEGY | ||
| ); | ||
| final BitmapIndex bitmapIndex = new BitmapIndexColumnPartSupplier( | ||
| bitmapFactory, | ||
| GenericIndexed.fromIterable( | ||
| FluentIterable.from(ints) | ||
| .transform( | ||
| new Function<Integer, ImmutableBitmap>() | ||
| { | ||
| @Override | ||
| public ImmutableBitmap apply(Integer i) | ||
| { | ||
| final MutableBitmap mutableBitmap = bitmapFactory.makeEmptyMutableBitmap(); | ||
| mutableBitmap.add((i - START_INT) / step); | ||
| return bitmapFactory.makeImmutableBitmap(mutableBitmap); | ||
| } | ||
| } | ||
| ), | ||
| serdeFactory.getObjectStrategy() | ||
| ), | ||
| dictionary | ||
| ).get(); | ||
| selector = new BitmapIndexSelector() | ||
| { | ||
| @Override | ||
| public Indexed<String> getDimensionValues(String dimension) | ||
| { | ||
| return dictionary; | ||
| } | ||
|
|
||
| @Override | ||
| public int getNumRows() | ||
| { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
|
|
||
| @Override | ||
| public BitmapFactory getBitmapFactory() | ||
| { | ||
| return bitmapFactory; | ||
| } | ||
|
|
||
| @Override | ||
| public ImmutableBitmap getBitmapIndex(String dimension, String value) | ||
| { | ||
| return bitmapIndex.getBitmap(bitmapIndex.getIndex(value)); | ||
| } | ||
|
|
||
| @Override | ||
| public BitmapIndex getBitmapIndex(String dimension) | ||
| { | ||
| return bitmapIndex; | ||
| } | ||
|
|
||
| @Override | ||
| public ImmutableRTree getSpatialIndex(String dimension) | ||
| { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
| }; | ||
| } | ||
|
|
||
| @Benchmark | ||
| @BenchmarkMode(Mode.AverageTime) | ||
| @OutputTimeUnit(TimeUnit.MICROSECONDS) | ||
| public void matchLikeEquals(Blackhole blackhole) | ||
| { | ||
| final ImmutableBitmap bitmapIndex = LIKE_EQUALS.getBitmapIndex(selector); | ||
| blackhole.consume(bitmapIndex); | ||
| } | ||
|
|
||
| @Benchmark | ||
| @BenchmarkMode(Mode.AverageTime) | ||
| @OutputTimeUnit(TimeUnit.MICROSECONDS) | ||
| public void matchSelectorEquals(Blackhole blackhole) | ||
| { | ||
| final ImmutableBitmap bitmapIndex = SELECTOR_EQUALS.getBitmapIndex(selector); | ||
| blackhole.consume(bitmapIndex); | ||
| } | ||
|
|
||
| @Benchmark | ||
| @BenchmarkMode(Mode.AverageTime) | ||
| @OutputTimeUnit(TimeUnit.MICROSECONDS) | ||
| public void matchLikePrefix(Blackhole blackhole) | ||
| { | ||
| final ImmutableBitmap bitmapIndex = LIKE_PREFIX.getBitmapIndex(selector); | ||
| blackhole.consume(bitmapIndex); | ||
| } | ||
|
|
||
| @Benchmark | ||
| @BenchmarkMode(Mode.AverageTime) | ||
| @OutputTimeUnit(TimeUnit.MICROSECONDS) | ||
| public void matchBoundPrefix(Blackhole blackhole) | ||
| { | ||
| final ImmutableBitmap bitmapIndex = BOUND_PREFIX.getBitmapIndex(selector); | ||
| blackhole.consume(bitmapIndex); | ||
| } | ||
|
|
||
| @Benchmark | ||
| @BenchmarkMode(Mode.AverageTime) | ||
| @OutputTimeUnit(TimeUnit.MICROSECONDS) | ||
| public void matchRegexPrefix(Blackhole blackhole) | ||
| { | ||
| final ImmutableBitmap bitmapIndex = REGEX_PREFIX.getBitmapIndex(selector); | ||
| blackhole.consume(bitmapIndex); | ||
| } | ||
|
|
||
| private List<Integer> generateInts() | ||
| { | ||
| final List<Integer> ints = new ArrayList<>(cardinality); | ||
|
|
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| for (int i = 0; i < cardinality; i++) { | ||
| ints.add(START_INT + step * i); | ||
| } | ||
|
|
||
| return ints; | ||
| } | ||
| } |
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