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Benchmark results: ``` Benchmark (typeSignature) (withNulls) Mode Cnt Score Error Units BenchmarkSelectiveStreamReaders.read boolean true avgt 20 0.040 ± 0.001 s/op BenchmarkSelectiveStreamReaders.read boolean false avgt 20 0.029 ± 0.001 s/op BenchmarkSelectiveStreamReaders.read integer true avgt 20 0.083 ± 0.004 s/op BenchmarkSelectiveStreamReaders.read integer false avgt 20 0.083 ± 0.003 s/op BenchmarkSelectiveStreamReaders.read bigint true avgt 20 0.081 ± 0.003 s/op BenchmarkSelectiveStreamReaders.read bigint false avgt 20 0.101 ± 0.003 s/op BenchmarkSelectiveStreamReaders.read smallint true avgt 20 0.077 ± 0.002 s/op BenchmarkSelectiveStreamReaders.read smallint false avgt 20 0.080 ± 0.003 s/op BenchmarkSelectiveStreamReaders.read date true avgt 20 0.081 ± 0.002 s/op BenchmarkSelectiveStreamReaders.read date false avgt 20 0.094 ± 0.004 s/op BenchmarkSelectiveStreamReaders.readWithFilter boolean true avgt 20 0.083 ± 0.005 s/op BenchmarkSelectiveStreamReaders.readWithFilter boolean false avgt 20 0.100 ± 0.002 s/op BenchmarkSelectiveStreamReaders.readWithFilter integer true avgt 20 0.108 ± 0.002 s/op BenchmarkSelectiveStreamReaders.readWithFilter integer false avgt 20 0.126 ± 0.003 s/op BenchmarkSelectiveStreamReaders.readWithFilter bigint true avgt 20 0.121 ± 0.008 s/op BenchmarkSelectiveStreamReaders.readWithFilter bigint false avgt 20 0.152 ± 0.006 s/op BenchmarkSelectiveStreamReaders.readWithFilter smallint true avgt 20 0.107 ± 0.012 s/op BenchmarkSelectiveStreamReaders.readWithFilter smallint false avgt 20 0.121 ± 0.002 s/op BenchmarkSelectiveStreamReaders.readWithFilter date true avgt 20 0.111 ± 0.007 s/op BenchmarkSelectiveStreamReaders.readWithFilter date false avgt 20 0.132 ± 0.005 s/op BenchmarkSelectiveStreamReaders.readAllNull boolean avgt 20 0.003 ± 0.001 s/op BenchmarkSelectiveStreamReaders.readAllNull integer avgt 20 0.003 ± 0.001 s/op BenchmarkSelectiveStreamReaders.readAllNull bigint avgt 20 0.003 ± 0.001 s/op BenchmarkSelectiveStreamReaders.readAllNull smallint avgt 20 0.003 ± 0.001 s/op BenchmarkSelectiveStreamReaders.readAllNull date avgt 20 0.003 ± 0.001 s/op ```
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209 changes: 209 additions & 0 deletions
209
...o-orc/src/main/java/com/facebook/presto/orc/reader/AbstractLongSelectiveStreamReader.java
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| /* | ||
| * 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.reader; | ||
|
|
||
| import com.facebook.presto.spi.block.Block; | ||
| import com.facebook.presto.spi.block.IntArrayBlock; | ||
| import com.facebook.presto.spi.block.LongArrayBlock; | ||
| import com.facebook.presto.spi.block.ShortArrayBlock; | ||
| import com.facebook.presto.spi.type.Type; | ||
|
|
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| import javax.annotation.Nullable; | ||
|
|
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| import java.util.Optional; | ||
|
|
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| import static com.facebook.presto.spi.type.BigintType.BIGINT; | ||
| import static com.facebook.presto.spi.type.DateType.DATE; | ||
| import static com.facebook.presto.spi.type.IntegerType.INTEGER; | ||
| import static com.facebook.presto.spi.type.SmallintType.SMALLINT; | ||
| import static java.lang.Math.toIntExact; | ||
| import static java.util.Objects.requireNonNull; | ||
|
|
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| abstract class AbstractLongSelectiveStreamReader | ||
| implements SelectiveStreamReader | ||
| { | ||
| protected final boolean outputRequired; | ||
| @Nullable | ||
| protected final Type outputType; | ||
|
|
||
| @Nullable | ||
| protected long[] values; | ||
| @Nullable | ||
| protected boolean[] nulls; | ||
| @Nullable | ||
| protected int[] outputPositions; | ||
| protected int outputPositionCount; | ||
|
|
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| protected AbstractLongSelectiveStreamReader(Optional<Type> outputType) | ||
| { | ||
| this.outputRequired = outputType.isPresent(); | ||
| this.outputType = requireNonNull(outputType, "outputType is null").orElse(null); | ||
| } | ||
|
|
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| @Override | ||
| public int[] getReadPositions() | ||
| { | ||
| return outputPositions; | ||
| } | ||
|
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| protected Block buildOutputBlock(int[] positions, int positionCount, boolean includeNulls) | ||
| { | ||
| if (outputType == BIGINT) { | ||
| return getLongArrayBlock(positions, positionCount, includeNulls); | ||
| } | ||
|
|
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| if (outputType == INTEGER || outputType == DATE) { | ||
| return getIntArrayBlock(positions, positionCount, includeNulls); | ||
| } | ||
|
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| if (outputType == SMALLINT) { | ||
| return getShortArrayBlock(positions, positionCount, includeNulls); | ||
| } | ||
|
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| throw new UnsupportedOperationException("Unsupported type: " + outputType); | ||
| } | ||
|
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| private Block getLongArrayBlock(int[] positions, int positionCount, boolean includeNulls) | ||
| { | ||
| if (positionCount == outputPositionCount) { | ||
| LongArrayBlock block; | ||
| if (includeNulls) { | ||
| block = new LongArrayBlock(positionCount, Optional.ofNullable(nulls), values); | ||
| nulls = null; | ||
| } | ||
| else { | ||
| block = new LongArrayBlock(positionCount, Optional.empty(), values); | ||
| } | ||
| values = null; | ||
| return block; | ||
| } | ||
|
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| long[] valuesCopy = new long[positionCount]; | ||
| boolean[] nullsCopy = null; | ||
|
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| if (includeNulls) { | ||
| nullsCopy = new boolean[positionCount]; | ||
| } | ||
|
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| int positionIndex = 0; | ||
| int nextPosition = positions[positionIndex]; | ||
| for (int i = 0; i < outputPositionCount; i++) { | ||
| if (outputPositions[i] < nextPosition) { | ||
| continue; | ||
| } | ||
|
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| assert outputPositions[i] == nextPosition; | ||
|
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| valuesCopy[positionIndex] = this.values[i]; | ||
| if (includeNulls) { | ||
| nullsCopy[positionIndex] = this.nulls[i]; | ||
| } | ||
|
|
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| positionIndex++; | ||
| if (positionIndex >= positionCount) { | ||
| break; | ||
| } | ||
|
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| nextPosition = positions[positionIndex]; | ||
| } | ||
|
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| return new LongArrayBlock(positionCount, Optional.ofNullable(nullsCopy), valuesCopy); | ||
| } | ||
|
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| private Block getIntArrayBlock(int[] positions, int positionCount, boolean includeNulls) | ||
| { | ||
| int[] valuesCopy = new int[positionCount]; | ||
| boolean[] nullsCopy = null; | ||
| if (includeNulls) { | ||
| nullsCopy = new boolean[positionCount]; | ||
| } | ||
|
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| int positionIndex = 0; | ||
| int nextPosition = positions[positionIndex]; | ||
| for (int i = 0; i < outputPositionCount; i++) { | ||
| if (outputPositions[i] < nextPosition) { | ||
| continue; | ||
| } | ||
|
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| assert outputPositions[i] == nextPosition; | ||
|
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| valuesCopy[positionIndex] = toIntExact(this.values[i]); | ||
| if (includeNulls) { | ||
| nullsCopy[positionIndex] = this.nulls[i]; | ||
| } | ||
|
|
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| positionIndex++; | ||
| if (positionIndex >= positionCount) { | ||
| break; | ||
| } | ||
|
|
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| nextPosition = positions[positionIndex]; | ||
| } | ||
|
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| return new IntArrayBlock(positionCount, Optional.ofNullable(nullsCopy), valuesCopy); | ||
| } | ||
|
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| private Block getShortArrayBlock(int[] positions, int positionCount, boolean includeNulls) | ||
| { | ||
| short[] valuesCopy = new short[positionCount]; | ||
| boolean[] nullsCopy = null; | ||
| if (includeNulls) { | ||
| nullsCopy = new boolean[positionCount]; | ||
| } | ||
|
|
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| int positionIndex = 0; | ||
| int nextPosition = positions[positionIndex]; | ||
| for (int i = 0; i < outputPositionCount; i++) { | ||
| if (outputPositions[i] < nextPosition) { | ||
| continue; | ||
| } | ||
|
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| assert outputPositions[i] == nextPosition; | ||
|
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| valuesCopy[positionIndex] = (short) this.values[i]; | ||
| if (includeNulls) { | ||
| nullsCopy[positionIndex] = this.nulls[i]; | ||
| } | ||
|
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| positionIndex++; | ||
| if (positionIndex >= positionCount) { | ||
| break; | ||
| } | ||
|
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| nextPosition = positions[positionIndex]; | ||
| } | ||
|
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| return new ShortArrayBlock(positionCount, Optional.ofNullable(nullsCopy), valuesCopy); | ||
| } | ||
|
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| protected void ensureValuesCapacity(int capacity, boolean recordNulls) | ||
| { | ||
| if (values == null || values.length < capacity) { | ||
| values = new long[capacity]; | ||
| } | ||
|
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| if (recordNulls) { | ||
| if (nulls == null || nulls.length < capacity) { | ||
| nulls = new boolean[capacity]; | ||
| } | ||
| } | ||
| } | ||
|
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| protected void ensureOutputPositionsCapacity(int capacity) | ||
| { | ||
| if (outputPositions == null || outputPositions.length < capacity) { | ||
| outputPositions = new int[capacity]; | ||
| } | ||
| } | ||
| } |
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