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[Star Tree] [Search] Support for metric aggregations with/without ter…
…m query (opensearch-project#15289) --------- Signed-off-by: Sandesh Kumar <sandeshkr419@gmail.com>
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248
...java/org/opensearch/index/compositeindex/datacube/startree/utils/StarTreeQueryHelper.java
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| /* | ||
| * SPDX-License-Identifier: Apache-2.0 | ||
| * | ||
| * The OpenSearch Contributors require contributions made to | ||
| * this file be licensed under the Apache-2.0 license or a | ||
| * compatible open source license. | ||
| */ | ||
|
|
||
| package org.opensearch.index.compositeindex.datacube.startree.utils; | ||
|
|
||
| import org.apache.lucene.index.DocValuesType; | ||
| import org.apache.lucene.index.LeafReaderContext; | ||
| import org.apache.lucene.index.SegmentReader; | ||
| import org.apache.lucene.search.CollectionTerminatedException; | ||
| import org.apache.lucene.search.DocIdSetIterator; | ||
| import org.apache.lucene.util.FixedBitSet; | ||
| import org.opensearch.common.lucene.Lucene; | ||
| import org.opensearch.index.codec.composite.CompositeIndexFieldInfo; | ||
| import org.opensearch.index.codec.composite.CompositeIndexReader; | ||
| import org.opensearch.index.compositeindex.datacube.Dimension; | ||
| import org.opensearch.index.compositeindex.datacube.Metric; | ||
| import org.opensearch.index.compositeindex.datacube.MetricStat; | ||
| import org.opensearch.index.compositeindex.datacube.startree.index.StarTreeValues; | ||
| import org.opensearch.index.compositeindex.datacube.startree.utils.iterator.SortedNumericStarTreeValuesIterator; | ||
| import org.opensearch.index.mapper.CompositeDataCubeFieldType; | ||
| import org.opensearch.index.query.MatchAllQueryBuilder; | ||
| import org.opensearch.index.query.QueryBuilder; | ||
| import org.opensearch.index.query.TermQueryBuilder; | ||
| import org.opensearch.search.aggregations.AggregatorFactory; | ||
| import org.opensearch.search.aggregations.LeafBucketCollector; | ||
| import org.opensearch.search.aggregations.LeafBucketCollectorBase; | ||
| import org.opensearch.search.aggregations.metrics.MetricAggregatorFactory; | ||
| import org.opensearch.search.aggregations.support.ValuesSource; | ||
| import org.opensearch.search.builder.SearchSourceBuilder; | ||
| import org.opensearch.search.internal.SearchContext; | ||
| import org.opensearch.search.startree.StarTreeFilter; | ||
| import org.opensearch.search.startree.StarTreeQueryContext; | ||
|
|
||
| import java.io.IOException; | ||
| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.function.Consumer; | ||
| import java.util.stream.Collectors; | ||
|
|
||
| /** | ||
| * Helper class for building star-tree query | ||
| * | ||
| * @opensearch.internal | ||
| * @opensearch.experimental | ||
| */ | ||
| public class StarTreeQueryHelper { | ||
|
|
||
| /** | ||
| * Checks if the search context can be supported by star-tree | ||
| */ | ||
| public static boolean isStarTreeSupported(SearchContext context) { | ||
| return context.aggregations() != null && context.mapperService().isCompositeIndexPresent() && context.parsedPostFilter() == null; | ||
| } | ||
|
|
||
| /** | ||
| * Gets StarTreeQueryContext from the search context and source builder. | ||
| * Returns null if the query and aggregation cannot be supported. | ||
| */ | ||
| public static StarTreeQueryContext getStarTreeQueryContext(SearchContext context, SearchSourceBuilder source) throws IOException { | ||
| // Current implementation assumes only single star-tree is supported | ||
| CompositeDataCubeFieldType compositeMappedFieldType = (CompositeDataCubeFieldType) context.mapperService() | ||
| .getCompositeFieldTypes() | ||
| .iterator() | ||
| .next(); | ||
| CompositeIndexFieldInfo starTree = new CompositeIndexFieldInfo( | ||
| compositeMappedFieldType.name(), | ||
| compositeMappedFieldType.getCompositeIndexType() | ||
| ); | ||
|
|
||
| for (AggregatorFactory aggregatorFactory : context.aggregations().factories().getFactories()) { | ||
| MetricStat metricStat = validateStarTreeMetricSupport(compositeMappedFieldType, aggregatorFactory); | ||
| if (metricStat == null) { | ||
| return null; | ||
| } | ||
| } | ||
|
|
||
| // need to cache star tree values only for multiple aggregations | ||
| boolean cacheStarTreeValues = context.aggregations().factories().getFactories().length > 1; | ||
| int cacheSize = cacheStarTreeValues ? context.indexShard().segments(false).size() : -1; | ||
|
|
||
| return StarTreeQueryHelper.tryCreateStarTreeQueryContext(starTree, compositeMappedFieldType, source.query(), cacheSize); | ||
| } | ||
|
|
||
| /** | ||
| * Uses query builder and composite index info to form star-tree query context | ||
| */ | ||
| private static StarTreeQueryContext tryCreateStarTreeQueryContext( | ||
| CompositeIndexFieldInfo compositeIndexFieldInfo, | ||
| CompositeDataCubeFieldType compositeFieldType, | ||
| QueryBuilder queryBuilder, | ||
| int cacheStarTreeValuesSize | ||
| ) { | ||
| Map<String, Long> queryMap; | ||
| if (queryBuilder == null || queryBuilder instanceof MatchAllQueryBuilder) { | ||
| queryMap = null; | ||
| } else if (queryBuilder instanceof TermQueryBuilder) { | ||
| // TODO: Add support for keyword fields | ||
| if (compositeFieldType.getDimensions().stream().anyMatch(d -> d.getDocValuesType() != DocValuesType.SORTED_NUMERIC)) { | ||
| // return null for non-numeric fields | ||
| return null; | ||
| } | ||
|
|
||
| List<String> supportedDimensions = compositeFieldType.getDimensions() | ||
| .stream() | ||
| .map(Dimension::getField) | ||
| .collect(Collectors.toList()); | ||
| queryMap = getStarTreePredicates(queryBuilder, supportedDimensions); | ||
| if (queryMap == null) { | ||
| return null; | ||
| } | ||
| } else { | ||
| return null; | ||
| } | ||
| return new StarTreeQueryContext(compositeIndexFieldInfo, queryMap, cacheStarTreeValuesSize); | ||
| } | ||
|
|
||
| /** | ||
| * Parse query body to star-tree predicates | ||
| * @param queryBuilder to match star-tree supported query shape | ||
| * @return predicates to match | ||
| */ | ||
| private static Map<String, Long> getStarTreePredicates(QueryBuilder queryBuilder, List<String> supportedDimensions) { | ||
| TermQueryBuilder tq = (TermQueryBuilder) queryBuilder; | ||
| String field = tq.fieldName(); | ||
| if (!supportedDimensions.contains(field)) { | ||
| return null; | ||
| } | ||
| long inputQueryVal = Long.parseLong(tq.value().toString()); | ||
|
|
||
| // Create a map with the field and the value | ||
| Map<String, Long> predicateMap = new HashMap<>(); | ||
| predicateMap.put(field, inputQueryVal); | ||
| return predicateMap; | ||
| } | ||
|
|
||
| private static MetricStat validateStarTreeMetricSupport( | ||
| CompositeDataCubeFieldType compositeIndexFieldInfo, | ||
| AggregatorFactory aggregatorFactory | ||
| ) { | ||
| if (aggregatorFactory instanceof MetricAggregatorFactory && aggregatorFactory.getSubFactories().getFactories().length == 0) { | ||
| String field; | ||
| Map<String, List<MetricStat>> supportedMetrics = compositeIndexFieldInfo.getMetrics() | ||
| .stream() | ||
| .collect(Collectors.toMap(Metric::getField, Metric::getMetrics)); | ||
|
|
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| MetricStat metricStat = ((MetricAggregatorFactory) aggregatorFactory).getMetricStat(); | ||
| field = ((MetricAggregatorFactory) aggregatorFactory).getField(); | ||
|
|
||
| if (supportedMetrics.containsKey(field) && supportedMetrics.get(field).contains(metricStat)) { | ||
| return metricStat; | ||
| } | ||
| } | ||
| return null; | ||
| } | ||
|
|
||
| public static CompositeIndexFieldInfo getSupportedStarTree(SearchContext context) { | ||
| StarTreeQueryContext starTreeQueryContext = context.getStarTreeQueryContext(); | ||
| return (starTreeQueryContext != null) ? starTreeQueryContext.getStarTree() : null; | ||
| } | ||
|
|
||
| public static StarTreeValues getStarTreeValues(LeafReaderContext context, CompositeIndexFieldInfo starTree) throws IOException { | ||
| SegmentReader reader = Lucene.segmentReader(context.reader()); | ||
| if (!(reader.getDocValuesReader() instanceof CompositeIndexReader)) { | ||
| return null; | ||
| } | ||
| CompositeIndexReader starTreeDocValuesReader = (CompositeIndexReader) reader.getDocValuesReader(); | ||
| return (StarTreeValues) starTreeDocValuesReader.getCompositeIndexValues(starTree); | ||
| } | ||
|
|
||
| /** | ||
| * Get the star-tree leaf collector | ||
| * This collector computes the aggregation prematurely and invokes an early termination collector | ||
| */ | ||
| public static LeafBucketCollector getStarTreeLeafCollector( | ||
| SearchContext context, | ||
| ValuesSource.Numeric valuesSource, | ||
| LeafReaderContext ctx, | ||
| LeafBucketCollector sub, | ||
| CompositeIndexFieldInfo starTree, | ||
| String metric, | ||
| Consumer<Long> valueConsumer, | ||
| Runnable finalConsumer | ||
| ) throws IOException { | ||
| StarTreeValues starTreeValues = getStarTreeValues(ctx, starTree); | ||
| assert starTreeValues != null; | ||
| String fieldName = ((ValuesSource.Numeric.FieldData) valuesSource).getIndexFieldName(); | ||
| String metricName = StarTreeUtils.fullyQualifiedFieldNameForStarTreeMetricsDocValues(starTree.getField(), fieldName, metric); | ||
|
|
||
| assert starTreeValues != null; | ||
| SortedNumericStarTreeValuesIterator valuesIterator = (SortedNumericStarTreeValuesIterator) starTreeValues.getMetricValuesIterator( | ||
| metricName | ||
| ); | ||
| // Obtain a FixedBitSet of matched star tree document IDs | ||
| FixedBitSet filteredValues = getStarTreeFilteredValues(context, ctx, starTreeValues); | ||
| assert filteredValues != null; | ||
|
|
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| int numBits = filteredValues.length(); // Get the number of the filtered values (matching docs) | ||
| if (numBits > 0) { | ||
| // Iterate over the filtered values | ||
| for (int bit = filteredValues.nextSetBit(0); bit != DocIdSetIterator.NO_MORE_DOCS; bit = (bit + 1 < numBits) | ||
| ? filteredValues.nextSetBit(bit + 1) | ||
| : DocIdSetIterator.NO_MORE_DOCS) { | ||
| // Advance to the entryId in the valuesIterator | ||
| if (valuesIterator.advanceExact(bit) == false) { | ||
| continue; // Skip if no more entries | ||
| } | ||
|
|
||
| // Iterate over the values for the current entryId | ||
| for (int i = 0, count = valuesIterator.entryValueCount(); i < count; i++) { | ||
| long value = valuesIterator.nextValue(); | ||
| valueConsumer.accept(value); // Apply the consumer operation (e.g., max, sum) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // Call the final consumer after processing all entries | ||
| finalConsumer.run(); | ||
|
|
||
| // Return a LeafBucketCollector that terminates collection | ||
| return new LeafBucketCollectorBase(sub, valuesSource.doubleValues(ctx)) { | ||
| @Override | ||
| public void collect(int doc, long bucket) { | ||
| throw new CollectionTerminatedException(); | ||
| } | ||
| }; | ||
| } | ||
|
|
||
| /** | ||
| * Get the filtered values for the star-tree query | ||
| * Cache the results in case of multiple aggregations (if cache is initialized) | ||
| * @return FixedBitSet of matched document IDs | ||
| */ | ||
| public static FixedBitSet getStarTreeFilteredValues(SearchContext context, LeafReaderContext ctx, StarTreeValues starTreeValues) | ||
| throws IOException { | ||
| FixedBitSet result = context.getStarTreeQueryContext().getStarTreeValues(ctx); | ||
| if (result == null) { | ||
| result = StarTreeFilter.getStarTreeResult(starTreeValues, context.getStarTreeQueryContext().getQueryMap()); | ||
| context.getStarTreeQueryContext().setStarTreeValues(ctx, result); | ||
| } | ||
| return result; | ||
| } | ||
| } |
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