Update comparators
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@ -20,13 +20,19 @@ package it.cavallium.dbengine.lucene;
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import java.util.Objects;
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import java.util.Objects;
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import java.util.concurrent.atomic.LongAccumulator;
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import java.util.concurrent.atomic.LongAccumulator;
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/** Maintains the maximum score and its corresponding document id concurrently */
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/**
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* Maintains the maximum score and its corresponding document id concurrently
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*
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* This class must mirror this changes:
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* <a href="https://github.com/apache/lucene/commits/94b66c0ed279fe23656d451fecd56fdfd106e1ea/lucene/core/src/java/org/apache/lucene/search/MaxScoreAccumulator.java">
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* Lucene MaxScoreAccumulator changes on GitHub</a>
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*/
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public final class MaxScoreAccumulator {
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public final class MaxScoreAccumulator {
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// we use 2^10-1 to check the remainder with a bitwise operation
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// we use 2^10-1 to check the remainder with a bitwise operation
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static final int DEFAULT_INTERVAL = 0x3ff;
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static final int DEFAULT_INTERVAL = 0x3ff;
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// scores are always positive
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// scores are always positive
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final LongAccumulator acc = new LongAccumulator(Long::max, Long.MIN_VALUE);
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final LongAccumulator acc = new LongAccumulator(MaxScoreAccumulator::maxEncode, Long.MIN_VALUE);
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// non-final and visible for tests
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// non-final and visible for tests
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public long modInterval;
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public long modInterval;
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@ -35,9 +41,26 @@ public final class MaxScoreAccumulator {
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this.modInterval = DEFAULT_INTERVAL;
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this.modInterval = DEFAULT_INTERVAL;
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}
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}
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public void accumulate(int docID, float score) {
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/**
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assert docID >= 0 && score >= 0;
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* Return the max encoded DocAndScore in a way that is consistent with {@link
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long encode = (((long) Float.floatToIntBits(score)) << 32) | docID;
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* DocAndScore#compareTo}.
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*/
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private static long maxEncode(long v1, long v2) {
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float score1 = Float.intBitsToFloat((int) (v1 >> 32));
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float score2 = Float.intBitsToFloat((int) (v2 >> 32));
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int cmp = Float.compare(score1, score2);
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if (cmp == 0) {
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// tie-break on the minimum doc base
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return (int) v1 < (int) v2 ? v1 : v2;
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} else if (cmp > 0) {
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return v1;
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}
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return v2;
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}
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public void accumulate(int docBase, float score) {
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assert docBase >= 0 && score >= 0;
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long encode = (((long) Float.floatToIntBits(score)) << 32) | docBase;
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acc.accumulate(encode);
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acc.accumulate(encode);
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}
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}
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@ -47,16 +70,16 @@ public final class MaxScoreAccumulator {
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return null;
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return null;
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}
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}
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float score = Float.intBitsToFloat((int) (value >> 32));
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float score = Float.intBitsToFloat((int) (value >> 32));
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int docID = (int) value;
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int docBase = (int) value;
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return new DocAndScore(docID, score);
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return new DocAndScore(docBase, score);
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}
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}
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public static class DocAndScore implements Comparable<DocAndScore> {
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public static class DocAndScore implements Comparable<DocAndScore> {
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public final int docID;
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public final int docBase;
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public final float score;
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public final float score;
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public DocAndScore(int docID, float score) {
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public DocAndScore(int docBase, float score) {
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this.docID = docID;
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this.docBase = docBase;
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this.score = score;
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this.score = score;
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}
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}
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@ -64,7 +87,14 @@ public final class MaxScoreAccumulator {
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public int compareTo(DocAndScore o) {
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public int compareTo(DocAndScore o) {
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int cmp = Float.compare(score, o.score);
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int cmp = Float.compare(score, o.score);
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if (cmp == 0) {
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if (cmp == 0) {
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return Integer.compare(docID, o.docID);
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// tie-break on the minimum doc base
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// For a given minimum competitive score, we want to know the first segment
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// where this score occurred, hence the reverse order here.
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// On segments with a lower docBase, any document whose score is greater
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// than or equal to this score would be competitive, while on segments with a
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// higher docBase, documents need to have a strictly greater score to be
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// competitive since we tie break on doc ID.
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return Integer.compare(o.docBase, docBase);
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}
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}
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return cmp;
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return cmp;
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}
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}
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@ -74,17 +104,17 @@ public final class MaxScoreAccumulator {
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if (this == o) return true;
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if (this == o) return true;
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if (o == null || getClass() != o.getClass()) return false;
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if (o == null || getClass() != o.getClass()) return false;
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DocAndScore result = (DocAndScore) o;
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DocAndScore result = (DocAndScore) o;
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return docID == result.docID && Float.compare(result.score, score) == 0;
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return docBase == result.docBase && Float.compare(result.score, score) == 0;
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}
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}
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@Override
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@Override
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public int hashCode() {
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public int hashCode() {
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return Objects.hash(docID, score);
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return Objects.hash(docBase, score);
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}
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}
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@Override
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@Override
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public String toString() {
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public String toString() {
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return "DocAndScore{" + "docID=" + docID + ", score=" + score + '}';
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return "DocAndScore{" + "docBase=" + docBase + ", score=" + score + '}';
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}
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}
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}
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}
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}
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}
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@ -51,6 +51,9 @@ import reactor.core.publisher.Flux;
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* <p>See the {@link #create(LLTempLMDBEnv, Sort, int, int)} (org.apache.lucene.search.Sort, int, int)} method for instantiating a
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* <p>See the {@link #create(LLTempLMDBEnv, Sort, int, int)} (org.apache.lucene.search.Sort, int, int)} method for instantiating a
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* TopFieldCollector.
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* TopFieldCollector.
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*
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*
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* This class must mirror this changes:
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* <a href="https://github.com/apache/lucene/commits/main/lucene/core/src/java/org/apache/lucene/search/TopFieldCollector.java">
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* Lucene TopFieldCollector changes on GitHub</a>
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*/
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*/
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public abstract class LMDBFullFieldDocCollector
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public abstract class LMDBFullFieldDocCollector
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extends FullDocsCollector<LMDBPriorityQueue<LLSlotDoc>, LLSlotDoc, LLFieldDoc> {
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extends FullDocsCollector<LMDBPriorityQueue<LLSlotDoc>, LLSlotDoc, LLFieldDoc> {
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@ -48,6 +48,10 @@ import org.jetbrains.annotations.Nullable;
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*
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*
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* <p><b>NOTE</b>: The values {@link Float#NaN} and {@link Float#NEGATIVE_INFINITY} are not valid
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* <p><b>NOTE</b>: The values {@link Float#NaN} and {@link Float#NEGATIVE_INFINITY} are not valid
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* scores. This collector will not properly collect hits with such scores.
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* scores. This collector will not properly collect hits with such scores.
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*
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* This class must mirror this changes:
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* <a href="https://github.com/apache/lucene/commits/main/lucene/core/src/java/org/apache/lucene/search/TopScoreDocCollector.java">
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* Lucene TopScoreDocCollector changes on GitHub</a>
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*/
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*/
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public abstract class LMDBFullScoreDocCollector extends FullDocsCollector<LMDBPriorityQueue<LLScoreDoc>, LLScoreDoc, LLScoreDoc> {
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public abstract class LMDBFullScoreDocCollector extends FullDocsCollector<LMDBPriorityQueue<LLScoreDoc>, LLScoreDoc, LLScoreDoc> {
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@ -73,14 +77,15 @@ public abstract class LMDBFullScoreDocCollector extends FullDocsCollector<LMDBPr
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public LeafCollector getLeafCollector(LeafReaderContext context) {
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public LeafCollector getLeafCollector(LeafReaderContext context) {
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// reset the minimum competitive score
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// reset the minimum competitive score
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docBase = context.docBase;
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docBase = context.docBase;
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minCompetitiveScore = 0f;
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return new ScorerLeafCollector() {
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return new ScorerLeafCollector() {
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@Override
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@Override
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public void setScorer(Scorable scorer) throws IOException {
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public void setScorer(Scorable scorer) throws IOException {
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super.setScorer(scorer);
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super.setScorer(scorer);
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minCompetitiveScore = 0f;
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if (minScoreAcc == null) {
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updateMinCompetitiveScore(scorer);
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updateMinCompetitiveScore(scorer);
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if (minScoreAcc != null) {
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} else {
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updateGlobalMinCompetitiveScore(scorer);
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updateGlobalMinCompetitiveScore(scorer);
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}
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}
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}
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}
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@ -280,7 +285,7 @@ public abstract class LMDBFullScoreDocCollector extends FullDocsCollector<LMDBPr
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// the next float if the global minimum score is set on a document id that is
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// the next float if the global minimum score is set on a document id that is
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// smaller than the ids in the current leaf
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// smaller than the ids in the current leaf
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float score =
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float score =
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docBase > maxMinScore.docID ? Math.nextUp(maxMinScore.score) : maxMinScore.score;
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docBase >= maxMinScore.docBase ? Math.nextUp(maxMinScore.score) : maxMinScore.score;
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if (score > minCompetitiveScore) {
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if (score > minCompetitiveScore) {
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assert hitsThresholdChecker.isThresholdReached(true);
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assert hitsThresholdChecker.isThresholdReached(true);
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scorer.setMinCompetitiveScore(score);
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scorer.setMinCompetitiveScore(score);
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@ -306,7 +311,7 @@ public abstract class LMDBFullScoreDocCollector extends FullDocsCollector<LMDBPr
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// we don't use the next float but we register the document
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// we don't use the next float but we register the document
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// id so that other leaves can require it if they are after
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// id so that other leaves can require it if they are after
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// the current maximum
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// the current maximum
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minScoreAcc.accumulate(pqTop.doc(), pqTop.score());
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minScoreAcc.accumulate(docBase, pqTop.score());
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}
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}
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}
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}
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}
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}
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@ -30,7 +30,10 @@ import org.apache.lucene.search.FieldComparator;
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import org.apache.lucene.search.LeafFieldComparator;
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import org.apache.lucene.search.LeafFieldComparator;
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import org.apache.lucene.search.Scorable;
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import org.apache.lucene.search.Scorable;
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/** Comparator that sorts by asc _doc */
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/**
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* Comparator that sorts by asc _doc
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* Based on {@link org.apache.lucene.search.comparators.DocComparator}
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* */
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public class DocComparator extends FieldComparator<Integer> {
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public class DocComparator extends FieldComparator<Integer> {
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private final IArray<Integer> docIDs;
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private final IArray<Integer> docIDs;
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private final boolean enableSkipping; // if skipping functionality should be enabled
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private final boolean enableSkipping; // if skipping functionality should be enabled
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@ -30,6 +30,7 @@ import org.apache.lucene.search.LeafFieldComparator;
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/**
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/**
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* Comparator based on {@link Double#compare} for {@code numHits}. This comparator provides a
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* Comparator based on {@link Double#compare} for {@code numHits}. This comparator provides a
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* skipping functionality - an iterator that can skip over non-competitive documents.
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* skipping functionality - an iterator that can skip over non-competitive documents.
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* Based on {@link org.apache.lucene.search.comparators.DoubleComparator}
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*/
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*/
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public class DoubleComparator extends NumericComparator<Double> {
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public class DoubleComparator extends NumericComparator<Double> {
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private final IArray<Double> values;
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private final IArray<Double> values;
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@ -30,6 +30,7 @@ import org.apache.lucene.search.LeafFieldComparator;
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/**
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/**
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* Comparator based on {@link Float#compare} for {@code numHits}. This comparator provides a
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* Comparator based on {@link Float#compare} for {@code numHits}. This comparator provides a
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* skipping functionality – an iterator that can skip over non-competitive documents.
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* skipping functionality – an iterator that can skip over non-competitive documents.
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* Based on {@link org.apache.lucene.search.comparators.FloatComparator}
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*/
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*/
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public class FloatComparator extends NumericComparator<Float> {
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public class FloatComparator extends NumericComparator<Float> {
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private final IArray<Float> values;
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private final IArray<Float> values;
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@ -30,6 +30,7 @@ import org.apache.lucene.search.LeafFieldComparator;
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/**
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/**
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* Comparator based on {@link Integer#compare} for {@code numHits}. This comparator provides a
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* Comparator based on {@link Integer#compare} for {@code numHits}. This comparator provides a
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* skipping functionality – an iterator that can skip over non-competitive documents.
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* skipping functionality – an iterator that can skip over non-competitive documents.
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* Based on {@link org.apache.lucene.search.comparators.IntComparator}
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*/
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*/
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public class IntComparator extends NumericComparator<Integer> {
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public class IntComparator extends NumericComparator<Integer> {
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private final IArray<Integer> values;
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private final IArray<Integer> values;
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@ -30,6 +30,7 @@ import org.apache.lucene.search.LeafFieldComparator;
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/**
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/**
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* Comparator based on {@link Long#compare} for {@code numHits}. This comparator provides a skipping
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* Comparator based on {@link Long#compare} for {@code numHits}. This comparator provides a skipping
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* functionality – an iterator that can skip over non-competitive documents.
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* functionality – an iterator that can skip over non-competitive documents.
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* Based on {@link org.apache.lucene.search.comparators.LongComparator}
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*/
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*/
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public class LongComparator extends NumericComparator<Long> {
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public class LongComparator extends NumericComparator<Long> {
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private final IArray<Long> values;
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private final IArray<Long> values;
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@ -20,7 +20,10 @@ package it.cavallium.dbengine.lucene.comparators;
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import java.io.IOException;
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import java.io.IOException;
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import org.apache.lucene.search.DocIdSetIterator;
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import org.apache.lucene.search.DocIdSetIterator;
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/** Docs iterator that starts iterating from a configurable minimum document */
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/**
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* Docs iterator that starts iterating from a configurable minimum document
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* Based on {@link org.apache.lucene.search.comparators.MinDocIterator}
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* */
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public class MinDocIterator extends DocIdSetIterator {
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public class MinDocIterator extends DocIdSetIterator {
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final int segmentMinDoc;
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final int segmentMinDoc;
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final int maxDoc;
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final int maxDoc;
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@ -21,6 +21,9 @@ import org.apache.lucene.search.DocIdSetIterator;
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import org.apache.lucene.search.LeafFieldComparator;
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import org.apache.lucene.search.LeafFieldComparator;
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import org.apache.lucene.search.Scorable;
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import org.apache.lucene.search.Scorable;
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/**
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* Based on {@link org.apache.lucene.search.comparators.MinDocIterator}
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*/
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public final class MultiLeafFieldComparator implements LeafFieldComparator {
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public final class MultiLeafFieldComparator implements LeafFieldComparator {
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private final LeafFieldComparator[] comparators;
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private final LeafFieldComparator[] comparators;
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/**
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/**
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* Abstract numeric comparator for comparing numeric values. This comparator provides a skipping
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* Abstract numeric comparator for comparing numeric values. This comparator provides a skipping
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* functionality – an iterator that can skip over non-competitive documents.
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* functionality – an iterator that can skip over non-competitive documents.
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*
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* <p>Parameter {@code field} provided in the constructor is used as a field name in the default
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* implementations of the methods {@code getNumericDocValues} and {@code getPointValues} to retrieve
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* doc values and points. You can pass a dummy value for a field name (e.g. when sorting by script),
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* but in this case you must override both of these methods.
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*
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* Based on {@link org.apache.lucene.search.comparators.NumericComparator}
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*/
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*/
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public abstract class NumericComparator<T extends Number> extends FieldComparator<T> {
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public abstract class NumericComparator<T extends Number> extends FieldComparator<T> {
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protected final T missingValue;
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protected final T missingValue;
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@ -92,7 +99,7 @@ public abstract class NumericComparator<T extends Number> extends FieldComparato
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public NumericLeafComparator(LeafReaderContext context) throws IOException {
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public NumericLeafComparator(LeafReaderContext context) throws IOException {
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this.docValues = getNumericDocValues(context, field);
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this.docValues = getNumericDocValues(context, field);
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this.pointValues = canSkipDocuments ? context.reader().getPointValues(field) : null;
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this.pointValues = canSkipDocuments ? getPointValues(context, field) : null;
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if (pointValues != null) {
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if (pointValues != null) {
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FieldInfo info = context.reader().getFieldInfos().fieldInfo(field);
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FieldInfo info = context.reader().getFieldInfos().fieldInfo(field);
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if (info == null || info.getPointDimensionCount() == 0) {
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if (info == null || info.getPointDimensionCount() == 0) {
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@ -130,12 +137,44 @@ public abstract class NumericComparator<T extends Number> extends FieldComparato
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}
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}
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}
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}
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/** Retrieves the NumericDocValues for the field in this segment */
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/**
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* Retrieves the NumericDocValues for the field in this segment
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*
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* <p>If you override this method, you must also override {@link
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* #getPointValues(LeafReaderContext, String)} This class uses sort optimization that leverages
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* points to filter out non-competitive matches, which relies on the assumption that points and
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* doc values record the same information.
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*
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* @param context – reader context
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* @param field - field name
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* @return numeric doc values for the field in this segment.
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* @throws IOException If there is a low-level I/O error
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*/
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protected NumericDocValues getNumericDocValues(LeafReaderContext context, String field)
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protected NumericDocValues getNumericDocValues(LeafReaderContext context, String field)
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throws IOException {
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throws IOException {
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return DocValues.getNumeric(context.reader(), field);
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return DocValues.getNumeric(context.reader(), field);
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}
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}
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/**
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* Retrieves point values for the field in this segment
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*
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* <p>If you override this method, you must also override {@link
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||||||
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* #getNumericDocValues(LeafReaderContext, String)} This class uses sort optimization that
|
||||||
|
* leverages points to filter out non-competitive matches, which relies on the assumption that
|
||||||
|
* points and doc values record the same information. Return {@code null} even if no points
|
||||||
|
* implementation is available, in this case sort optimization with points will be disabled.
|
||||||
|
*
|
||||||
|
* @param context – reader context
|
||||||
|
* @param field - field name
|
||||||
|
* @return point values for the field in this segment if they are available or {@code null} if
|
||||||
|
* sort optimization with points should be disabled.
|
||||||
|
* @throws IOException If there is a low-level I/O error
|
||||||
|
*/
|
||||||
|
protected PointValues getPointValues(LeafReaderContext context, String field)
|
||||||
|
throws IOException {
|
||||||
|
return context.reader().getPointValues(field);
|
||||||
|
}
|
||||||
|
|
||||||
@Override
|
@Override
|
||||||
public void setBottom(int slot) throws IOException {
|
public void setBottom(int slot) throws IOException {
|
||||||
queueFull = true; // if we are setting bottom, it means that we have collected enough hits
|
queueFull = true; // if we are setting bottom, it means that we have collected enough hits
|
||||||
|
|
|
@ -38,6 +38,7 @@ import org.apache.lucene.util.BytesRefBuilder;
|
||||||
* Sorts by descending relevance. NOTE: if you are sorting only by descending relevance and then secondarily by
|
* Sorts by descending relevance. NOTE: if you are sorting only by descending relevance and then secondarily by
|
||||||
* ascending docID, performance is faster using {@link org.apache.lucene.search.TopScoreDocCollector} directly (which {@link
|
* ascending docID, performance is faster using {@link org.apache.lucene.search.TopScoreDocCollector} directly (which {@link
|
||||||
* org.apache.lucene.search.IndexSearcher#search(Query, int)} uses when no {@link org.apache.lucene.search.Sort} is specified).
|
* org.apache.lucene.search.IndexSearcher#search(Query, int)} uses when no {@link org.apache.lucene.search.Sort} is specified).
|
||||||
|
* Based on {@link org.apache.lucene.search.FieldComparator.RelevanceComparator}
|
||||||
*/
|
*/
|
||||||
public final class RelevanceComparator extends FieldComparator<Float> implements LeafFieldComparator {
|
public final class RelevanceComparator extends FieldComparator<Float> implements LeafFieldComparator {
|
||||||
|
|
||||||
|
|
|
@ -26,6 +26,7 @@ import org.apache.lucene.util.BytesRefBuilder;
|
||||||
* using the ordinals. For medium to large results, this comparator will be much faster than
|
* using the ordinals. For medium to large results, this comparator will be much faster than
|
||||||
* {@link org.apache.lucene.search.FieldComparator.TermValComparator}. For very small result sets
|
* {@link org.apache.lucene.search.FieldComparator.TermValComparator}. For very small result sets
|
||||||
* it may be slower.
|
* it may be slower.
|
||||||
|
* Based on {@link org.apache.lucene.search.FieldComparator.TermOrdValComparator}
|
||||||
*/
|
*/
|
||||||
public class TermOrdValComparator extends FieldComparator<BytesRef> implements LeafFieldComparator {
|
public class TermOrdValComparator extends FieldComparator<BytesRef> implements LeafFieldComparator {
|
||||||
/* Ords for each slot.
|
/* Ords for each slot.
|
||||||
|
|
|
@ -0,0 +1,6 @@
|
||||||
|
/**
|
||||||
|
* This package must mirror this changes:
|
||||||
|
* <a href="https://github.com/apache/lucene/commits/main/lucene/core/src/java/org/apache/lucene/search/comparators">
|
||||||
|
* Lucene comparators changes on GitHub</a>
|
||||||
|
*/
|
||||||
|
package it.cavallium.dbengine.lucene.comparators;
|
Loading…
Reference in New Issue
Block a user