Pack dimension values in time-series aggregation #136216
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,272 @@ | ||
| /* | ||
| * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one | ||
| * or more contributor license agreements. Licensed under the Elastic License | ||
| * 2.0; you may not use this file except in compliance with the Elastic License | ||
| * 2.0. | ||
| */ | ||
|
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| package org.elasticsearch.xpack.esql.expression.function.scalar.internal; | ||
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| import org.apache.lucene.util.BytesRef; | ||
| import org.elasticsearch.compute.data.BooleanBlock; | ||
| import org.elasticsearch.compute.data.BytesRefBlock; | ||
| import org.elasticsearch.compute.data.BytesRefVector; | ||
| import org.elasticsearch.compute.data.IntBlock; | ||
| import org.elasticsearch.compute.data.LongBlock; | ||
| import org.elasticsearch.compute.data.OrdinalBytesRefVector; | ||
| import org.elasticsearch.compute.operator.BreakingBytesRefBuilder; | ||
| import org.elasticsearch.compute.operator.DriverContext; | ||
| import org.elasticsearch.compute.operator.topn.TopNEncoder; | ||
|
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| final class InternalPacks { | ||
| private static final TopNEncoder ENCODER = TopNEncoder.DEFAULT_UNSORTABLE; | ||
| public static final int INITIAL_SIZE_IN_BYTES = 6 * 1024; | ||
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|
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| static int estimateForBytesBuilder(int positionCount) { | ||
| // allocate at least one page for the bytes block builder to avoid copying during resizing | ||
| return Math.max(INITIAL_SIZE_IN_BYTES, positionCount); | ||
| } | ||
|
|
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| static BytesRefBlock packBytesValues(DriverContext driverContext, BytesRefBlock raw) { | ||
|
There was a problem hiding this comment. This is where we encode multi-valued block into a single value. |
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| BytesRefVector vector = raw.asVector(); | ||
| if (vector != null) { | ||
| OrdinalBytesRefVector ordinals = vector.asOrdinals(); | ||
| if (ordinals != null) { | ||
| var encoded = packBytesVector(driverContext, ordinals.getDictionaryVector()); | ||
| ordinals.getOrdinalsVector().incRef(); | ||
| return new OrdinalBytesRefVector(ordinals.getOrdinalsVector(), encoded).asBlock(); | ||
| } else { | ||
| return packBytesVector(driverContext, vector).asBlock(); | ||
| } | ||
| } | ||
| int positionCount = raw.getPositionCount(); | ||
| try ( | ||
| var builder = driverContext.blockFactory().newBytesRefBlockBuilder(estimateForBytesBuilder(positionCount)); | ||
| var work = new BreakingBytesRefBuilder(driverContext.breaker(), "pack_dimensions", 1024) | ||
| ) { | ||
| BytesRef scratch = new BytesRef(); | ||
| for (int p = 0; p < positionCount; p++) { | ||
| int valueCount = raw.getValueCount(p); | ||
| if (valueCount == 0) { | ||
| builder.appendNull(); | ||
| continue; | ||
| } | ||
| work.clear(); | ||
| int first = raw.getFirstValueIndex(p); | ||
| int end = first + valueCount; | ||
| for (int i = first; i < end; i++) { | ||
| raw.getBytesRef(i, scratch); | ||
| ENCODER.encodeBytesRef(scratch, work); | ||
| } | ||
| builder.appendBytesRef(work.bytesRefView()); | ||
| } | ||
| return builder.build(); | ||
| } | ||
| } | ||
|
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| static BytesRefVector packBytesVector(DriverContext driverContext, BytesRefVector encode) { | ||
| int positionCount = encode.getPositionCount(); | ||
| try ( | ||
| var builder = driverContext.blockFactory().newBytesRefVectorBuilder(estimateForBytesBuilder(positionCount)); | ||
| var work = new BreakingBytesRefBuilder(driverContext.breaker(), "pack_values", 1024) | ||
| ) { | ||
| BytesRef scratch = new BytesRef(); | ||
| for (int p = 0; p < positionCount; p++) { | ||
| ENCODER.encodeBytesRef(encode.getBytesRef(p, scratch), work); | ||
| builder.appendBytesRef(work.bytesRefView()); | ||
| work.clear(); | ||
| } | ||
| return builder.build(); | ||
| } | ||
| } | ||
|
|
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| static BytesRefBlock unpackBytesValues(DriverContext driverContext, BytesRefBlock encoded) { | ||
|
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| int positionCount = encoded.getPositionCount(); | ||
| try (var builder = driverContext.blockFactory().newBytesRefBlockBuilder(estimateForBytesBuilder(positionCount));) { | ||
| BytesRef inScratch = new BytesRef(); | ||
| BytesRef outScratch = new BytesRef(); | ||
| for (int p = 0; p < positionCount; p++) { | ||
| if (encoded.isNull(p)) { | ||
| builder.appendNull(); | ||
| continue; | ||
| } | ||
| BytesRef row = encoded.getBytesRef(p, inScratch); | ||
| var v = ENCODER.decodeBytesRef(row, outScratch); | ||
| if (row.length == 0) { | ||
| builder.appendBytesRef(v); | ||
| } else { | ||
| builder.beginPositionEntry(); | ||
| builder.appendBytesRef(v); | ||
| while (row.length > 0) { | ||
| v = ENCODER.decodeBytesRef(row, outScratch); | ||
| builder.appendBytesRef(v); | ||
| } | ||
| builder.endPositionEntry(); | ||
| } | ||
| } | ||
| return builder.build(); | ||
| } | ||
| } | ||
|
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| static BytesRefBlock packLongValues(DriverContext driverContext, LongBlock raw) { | ||
| int positionCount = raw.getPositionCount(); | ||
| try ( | ||
| var builder = driverContext.blockFactory().newBytesRefBlockBuilder(estimateForBytesBuilder(positionCount)); | ||
| var work = new BreakingBytesRefBuilder(driverContext.breaker(), "pack_values", 32) | ||
| ) { | ||
| for (int p = 0; p < positionCount; p++) { | ||
| int valueCount = raw.getValueCount(p); | ||
| if (valueCount == 0) { | ||
| builder.appendNull(); | ||
| continue; | ||
| } | ||
| work.clear(); | ||
| int first = raw.getFirstValueIndex(p); | ||
| if (valueCount == 1) { | ||
| ENCODER.encodeLong(raw.getLong(first), work); | ||
| } else { | ||
| int end = first + valueCount; | ||
| for (int i = first; i < end; i++) { | ||
| ENCODER.encodeLong(raw.getLong(i), work); | ||
| } | ||
| } | ||
| builder.appendBytesRef(work.bytesRefView()); | ||
| } | ||
| return builder.build(); | ||
| } | ||
| } | ||
|
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| static LongBlock unpackLongValues(DriverContext driverContext, BytesRefBlock encoded) { | ||
| int positionCount = encoded.getPositionCount(); | ||
| try (var builder = driverContext.blockFactory().newLongBlockBuilder(positionCount)) { | ||
| BytesRef inScratch = new BytesRef(); | ||
| for (int p = 0; p < positionCount; p++) { | ||
| if (encoded.isNull(p)) { | ||
| builder.appendNull(); | ||
| continue; | ||
| } | ||
| BytesRef row = encoded.getBytesRef(p, inScratch); | ||
| var v = ENCODER.decodeLong(row); | ||
| if (row.length == 0) { | ||
| builder.appendLong(v); | ||
| } else { | ||
| builder.beginPositionEntry(); | ||
| builder.appendLong(v); | ||
| while (row.length > 0) { | ||
| builder.appendLong(ENCODER.decodeLong(row)); | ||
| } | ||
| builder.endPositionEntry(); | ||
| } | ||
| } | ||
| return builder.build(); | ||
| } | ||
| } | ||
|
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| static BytesRefBlock packIntValues(DriverContext driverContext, IntBlock raw) { | ||
| int positionCount = raw.getPositionCount(); | ||
| try ( | ||
| var builder = driverContext.blockFactory().newBytesRefBlockBuilder(estimateForBytesBuilder(positionCount)); | ||
| var work = new BreakingBytesRefBuilder(driverContext.breaker(), "pack_values", 32) | ||
| ) { | ||
| for (int p = 0; p < positionCount; p++) { | ||
| int valueCount = raw.getValueCount(p); | ||
| if (valueCount == 0) { | ||
| builder.appendNull(); | ||
| continue; | ||
| } | ||
| work.clear(); | ||
| int first = raw.getFirstValueIndex(p); | ||
| if (valueCount == 1) { | ||
| ENCODER.encodeInt(raw.getInt(first), work); | ||
| } else { | ||
| int end = first + valueCount; | ||
| for (int i = first; i < end; i++) { | ||
| ENCODER.encodeInt(raw.getInt(i), work); | ||
| } | ||
| } | ||
| builder.appendBytesRef(work.bytesRefView()); | ||
| } | ||
| return builder.build(); | ||
| } | ||
| } | ||
|
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| static IntBlock unpackIntValues(DriverContext driverContext, BytesRefBlock encoded) { | ||
| int positionCount = encoded.getPositionCount(); | ||
| try (IntBlock.Builder builder = driverContext.blockFactory().newIntBlockBuilder(positionCount)) { | ||
| BytesRef inScratch = new BytesRef(); | ||
| for (int p = 0; p < positionCount; p++) { | ||
| if (encoded.isNull(p)) { | ||
| builder.appendNull(); | ||
| continue; | ||
| } | ||
| BytesRef row = encoded.getBytesRef(p, inScratch); | ||
| int v = ENCODER.decodeInt(row); | ||
| if (row.length == 0) { | ||
| builder.appendInt(v); | ||
| } else { | ||
| builder.beginPositionEntry(); | ||
| builder.appendInt(v); | ||
| while (row.length > 0) { | ||
| builder.appendInt(ENCODER.decodeInt(row)); | ||
| } | ||
| builder.endPositionEntry(); | ||
| } | ||
| } | ||
| return builder.build(); | ||
| } | ||
| } | ||
|
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| static BytesRefBlock packBooleanValues(DriverContext driverContext, BooleanBlock raw) { | ||
| int positionCount = raw.getPositionCount(); | ||
| try ( | ||
| var builder = driverContext.blockFactory().newBytesRefBlockBuilder(positionCount); | ||
| var work = new BreakingBytesRefBuilder(driverContext.breaker(), "pack_values", 32) | ||
| ) { | ||
| for (int p = 0; p < positionCount; p++) { | ||
| work.clear(); | ||
| int valueCount = raw.getValueCount(p); | ||
| if (valueCount == 0) { | ||
| builder.appendNull(); | ||
| continue; | ||
| } | ||
| int first = raw.getFirstValueIndex(p); | ||
| if (valueCount == 1) { | ||
| ENCODER.encodeBoolean(raw.getBoolean(first), work); | ||
| } else { | ||
| int end = first + valueCount; | ||
| for (int i = first; i < end; i++) { | ||
| ENCODER.encodeBoolean(raw.getBoolean(i), work); | ||
| } | ||
| } | ||
| builder.appendBytesRef(work.bytesRefView()); | ||
| } | ||
| return builder.build(); | ||
| } | ||
| } | ||
|
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| static BooleanBlock unpackBooleanValues(DriverContext driverContext, BytesRefBlock encoded) { | ||
| int positionCount = encoded.getPositionCount(); | ||
| try (var builder = driverContext.blockFactory().newBooleanBlockBuilder(positionCount)) { | ||
| BytesRef inScratch = new BytesRef(); | ||
| for (int p = 0; p < positionCount; p++) { | ||
| if (encoded.isNull(p)) { | ||
| builder.appendNull(); | ||
| continue; | ||
| } | ||
| BytesRef row = encoded.getBytesRef(p, inScratch); | ||
| boolean v = ENCODER.decodeBoolean(row); | ||
| if (row.length == 0) { | ||
| builder.appendBoolean(v); | ||
| } else { | ||
| builder.beginPositionEntry(); | ||
| builder.appendBoolean(v); | ||
| while (row.length > 0) { | ||
| builder.appendBoolean(ENCODER.decodeBoolean(row)); | ||
| } | ||
| builder.endPositionEntry(); | ||
| } | ||
| } | ||
| return builder.build(); | ||
| } | ||
| } | ||
| } | ||
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We return arrays for grouping dimensions.