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Add metadata classes for map statistics
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94 changes: 94 additions & 0 deletions
94
...to-orc/src/main/java/com/facebook/presto/orc/metadata/statistics/MapColumnStatistics.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| /* | ||
| * 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.orc.metadata.statistics; | ||
|
|
||
| import com.google.common.base.MoreObjects.ToStringHelper; | ||
| import org.openjdk.jol.info.ClassLayout; | ||
|
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| import java.util.Objects; | ||
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| import static java.util.Objects.requireNonNull; | ||
|
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| public class MapColumnStatistics | ||
| extends ColumnStatistics | ||
| { | ||
| private static final int INSTANCE_SIZE = ClassLayout.parseClass(MapColumnStatistics.class).instanceSize(); | ||
| private final MapStatistics mapStatistics; | ||
|
|
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| public MapColumnStatistics(Long numberOfValues, HiveBloomFilter bloomFilter, MapStatistics mapStatistics) | ||
| { | ||
| super(numberOfValues, bloomFilter); | ||
| this.mapStatistics = requireNonNull(mapStatistics, "mapStatistics is null"); | ||
| } | ||
|
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| @Override | ||
| public MapStatistics getMapStatistics() | ||
| { | ||
| return mapStatistics; | ||
| } | ||
|
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| @Override | ||
| public long getTotalValueSizeInBytes() | ||
| { | ||
| long size = 0; | ||
| for (MapStatisticsEntry entry : mapStatistics.getEntries()) { | ||
| size += entry.getColumnStatistics().getTotalValueSizeInBytes(); | ||
| } | ||
| return size; | ||
| } | ||
|
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| @Override | ||
| public ColumnStatistics withBloomFilter(HiveBloomFilter bloomFilter) | ||
| { | ||
| return new MapColumnStatistics(getNumberOfValues(), bloomFilter, mapStatistics); | ||
| } | ||
|
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| @Override | ||
| public long getRetainedSizeInBytes() | ||
| { | ||
| return INSTANCE_SIZE + getMembersSizeInBytes() + mapStatistics.getRetainedSizeInBytes(); | ||
| } | ||
|
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| @Override | ||
| public void addHash(StatisticsHasher hasher) | ||
| { | ||
| super.addHash(hasher); | ||
| hasher.putOptionalHashable(mapStatistics); | ||
| } | ||
|
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| @Override | ||
| protected ToStringHelper getToStringHelper() | ||
| { | ||
| return super.getToStringHelper() | ||
| .add("mapStatistics", mapStatistics); | ||
| } | ||
|
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| @Override | ||
| public boolean equals(Object o) | ||
| { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (o == null || getClass() != o.getClass()) { | ||
| return false; | ||
| } | ||
| MapColumnStatistics that = (MapColumnStatistics) o; | ||
| return equalsInternal(that) && Objects.equals(mapStatistics, that.mapStatistics); | ||
| } | ||
|
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| public int hashCode() | ||
| { | ||
| return Objects.hash(super.hashCode(), mapStatistics); | ||
| } | ||
| } |
102 changes: 102 additions & 0 deletions
102
...src/main/java/com/facebook/presto/orc/metadata/statistics/MapColumnStatisticsBuilder.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| /* | ||
| * 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.orc.metadata.statistics; | ||
|
|
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| import com.facebook.presto.common.block.Block; | ||
| import com.facebook.presto.common.type.Type; | ||
| import com.facebook.presto.orc.proto.DwrfProto; | ||
| import com.google.common.collect.ImmutableList; | ||
|
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| import java.util.ArrayList; | ||
| import java.util.LinkedHashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Optional; | ||
|
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| import static com.facebook.presto.orc.metadata.statistics.ColumnStatistics.mergeColumnStatistics; | ||
| import static java.util.Objects.requireNonNull; | ||
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| public class MapColumnStatisticsBuilder | ||
| implements StatisticsBuilder | ||
| { | ||
| private long nonNullValueCount; | ||
| private boolean hasEntries; | ||
| private final ImmutableList.Builder<MapStatisticsEntry> entries = new ImmutableList.Builder<>(); | ||
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| @Override | ||
| public void addBlock(Type type, Block block) | ||
| { | ||
| throw new UnsupportedOperationException(); | ||
| } | ||
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| // Note: MapColumnStatisticsBuilder doesn't check the uniqueness of the keys | ||
| public void addMapStatistics(DwrfProto.KeyInfo key, ColumnStatistics columnStatistics) | ||
| { | ||
| requireNonNull(key, "key is null"); | ||
| requireNonNull(columnStatistics, "columnStatistics is null"); | ||
| nonNullValueCount += columnStatistics.getNumberOfValues(); | ||
| hasEntries = true; | ||
| entries.add(new MapStatisticsEntry(key, columnStatistics)); | ||
| } | ||
|
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| private Optional<MapStatistics> buildMapStatistics() | ||
| { | ||
| if (hasEntries) { | ||
| MapStatistics mapStatistics = new MapStatistics(entries.build()); | ||
| return Optional.of(mapStatistics); | ||
| } | ||
| return Optional.empty(); | ||
| } | ||
|
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| @Override | ||
| public ColumnStatistics buildColumnStatistics() | ||
| { | ||
| if (hasEntries) { | ||
| MapStatistics mapStatistics = new MapStatistics(entries.build()); | ||
| return new MapColumnStatistics(nonNullValueCount, null, mapStatistics); | ||
| } | ||
| return new ColumnStatistics(nonNullValueCount, null); | ||
| } | ||
|
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| public static Optional<MapStatistics> mergeMapStatistics(List<ColumnStatistics> stats) | ||
| { | ||
| Map<DwrfProto.KeyInfo, List<ColumnStatistics>> columnStatisticsByKey = new LinkedHashMap<>(); | ||
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| for (ColumnStatistics columnStatistics : stats) { | ||
| if (columnStatistics.getNumberOfValues() > 0) { | ||
| MapStatistics partialStatistics = columnStatistics.getMapStatistics(); | ||
| if (partialStatistics == null) { | ||
| // there are non-null values but no statistics, so we can not say anything about the data | ||
| return Optional.empty(); | ||
| } | ||
|
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| // collect column stats for each key for merging later | ||
| for (MapStatisticsEntry entry : partialStatistics.getEntries()) { | ||
| List<ColumnStatistics> allKeyStats = columnStatisticsByKey.computeIfAbsent(entry.getKey(), (k) -> new ArrayList<>()); | ||
| allKeyStats.add(entry.getColumnStatistics()); | ||
| } | ||
| } | ||
| } | ||
|
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| // merge all column stats for each key | ||
| MapColumnStatisticsBuilder mapStatisticsBuilder = new MapColumnStatisticsBuilder(); | ||
| for (Map.Entry<DwrfProto.KeyInfo, List<ColumnStatistics>> entry : columnStatisticsByKey.entrySet()) { | ||
| ColumnStatistics mergedColumnStatistics = mergeColumnStatistics(entry.getValue()); | ||
| DwrfProto.KeyInfo key = entry.getKey(); | ||
| mapStatisticsBuilder.addMapStatistics(key, mergedColumnStatistics); | ||
| } | ||
|
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| return mapStatisticsBuilder.buildMapStatistics(); | ||
| } | ||
| } |
82 changes: 82 additions & 0 deletions
82
presto-orc/src/main/java/com/facebook/presto/orc/metadata/statistics/MapStatistics.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,82 @@ | ||
| /* | ||
| * 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.orc.metadata.statistics; | ||
|
|
||
| import org.openjdk.jol.info.ClassLayout; | ||
|
|
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| import java.util.List; | ||
| import java.util.Objects; | ||
|
|
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| import static com.facebook.presto.orc.metadata.statistics.StatisticsHasher.Hashable; | ||
| import static com.google.common.base.MoreObjects.toStringHelper; | ||
| import static java.util.Objects.requireNonNull; | ||
|
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| public class MapStatistics | ||
| implements Hashable | ||
| { | ||
| private static final int INSTANCE_SIZE = ClassLayout.parseClass(MapStatistics.class).instanceSize(); | ||
| private final List<MapStatisticsEntry> entries; | ||
|
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| public MapStatistics(List<MapStatisticsEntry> entries) | ||
| { | ||
| this.entries = requireNonNull(entries, "entries is null"); | ||
| } | ||
|
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| public List<MapStatisticsEntry> getEntries() | ||
| { | ||
| return entries; | ||
| } | ||
|
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| public long getRetainedSizeInBytes() | ||
| { | ||
| long entriesSize = 0; | ||
| for (MapStatisticsEntry entry : entries) { | ||
| entriesSize += entry.getRetainedSizeInBytes(); | ||
| } | ||
| return INSTANCE_SIZE + entriesSize; | ||
| } | ||
|
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| @Override | ||
| public boolean equals(Object o) | ||
| { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (o == null || getClass() != o.getClass()) { | ||
| return false; | ||
| } | ||
| MapStatistics that = (MapStatistics) o; | ||
| return Objects.equals(entries, that.entries); | ||
| } | ||
|
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| @Override | ||
| public int hashCode() | ||
| { | ||
| return Objects.hash(entries); | ||
| } | ||
|
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| @Override | ||
| public String toString() | ||
| { | ||
| return toStringHelper(this) | ||
| .add("entries", entries) | ||
| .toString(); | ||
| } | ||
|
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| @Override | ||
| public void addHash(StatisticsHasher hasher) | ||
| { | ||
| entries.forEach(hasher::putOptionalHashable); | ||
| } | ||
| } |
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