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* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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.
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package org.elasticsearch.search.query;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field.Store;
import org.apache.lucene.document.StringField;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.index.MultiReader;
import org.apache.lucene.index.NoMergePolicy;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.index.Term;
import org.apache.lucene.search.BooleanClause.Occur;
import org.apache.lucene.search.BooleanQuery;
import org.apache.lucene.search.Collector;
import org.apache.lucene.search.ConstantScoreQuery;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.search.MatchNoDocsQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.Weight;
import org.apache.lucene.store.Directory;
import org.elasticsearch.action.search.SearchTask;
import org.elasticsearch.index.query.ParsedQuery;
import org.elasticsearch.test.ESTestCase;
import org.elasticsearch.test.TestSearchContext;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.atomic.AtomicBoolean;
public class QueryPhaseTests extends ESTestCase {
private void countTestCase(Query query, IndexReader reader, boolean shouldCollect) throws Exception {
TestSearchContext context = new TestSearchContext(null);
context.parsedQuery(new ParsedQuery(query));
context.setSize(0);
context.setTask(new SearchTask(123L, "", "", "", null));
IndexSearcher searcher = new IndexSearcher(reader);
final AtomicBoolean collected = new AtomicBoolean();
IndexSearcher contextSearcher = new IndexSearcher(reader) {
protected void search(List<LeafReaderContext> leaves, Weight weight, Collector collector) throws IOException {
collected.set(true);
super.search(leaves, weight, collector);
}
};
final boolean rescore = QueryPhase.execute(context, contextSearcher);
assertFalse(rescore);
assertEquals(searcher.count(query), context.queryResult().topDocs().totalHits);
assertEquals(shouldCollect, collected.get());
}
private void countTestCase(boolean withDeletions) throws Exception {
Directory dir = newDirectory();
IndexWriterConfig iwc = newIndexWriterConfig().setMergePolicy(NoMergePolicy.INSTANCE);
RandomIndexWriter w = new RandomIndexWriter(random(), dir, iwc);
final int numDocs = scaledRandomIntBetween(100, 200);
for (int i = 0; i < numDocs; ++i) {
Document doc = new Document();
if (randomBoolean()) {
doc.add(new StringField("foo", "bar", Store.NO));
}
if (randomBoolean()) {
doc.add(new StringField("foo", "baz", Store.NO));
}
if (withDeletions && (rarely() || i == 0)) {
doc.add(new StringField("delete", "yes", Store.NO));
}
w.addDocument(doc);
}
if (withDeletions) {
w.deleteDocuments(new Term("delete", "yes"));
}
final IndexReader reader = w.getReader();
Query matchAll = new MatchAllDocsQuery();
Query matchAllCsq = new ConstantScoreQuery(matchAll);
Query tq = new TermQuery(new Term("foo", "bar"));
Query tCsq = new ConstantScoreQuery(tq);
BooleanQuery bq = new BooleanQuery.Builder()
.add(matchAll, Occur.SHOULD)
.add(tq, Occur.MUST)
.build();
countTestCase(matchAll, reader, false);
countTestCase(matchAllCsq, reader, false);
countTestCase(tq, reader, withDeletions);
countTestCase(tCsq, reader, withDeletions);
countTestCase(bq, reader, true);
reader.close();
w.close();
dir.close();
}
public void testCountWithoutDeletions() throws Exception {
countTestCase(false);
}
public void testCountWithDeletions() throws Exception {
countTestCase(true);
}
public void testPostFilterDisablesCountOptimization() throws Exception {
TestSearchContext context = new TestSearchContext(null);
context.parsedQuery(new ParsedQuery(new MatchAllDocsQuery()));
context.setSize(0);
context.setTask(new SearchTask(123L, "", "", "", null));
final AtomicBoolean collected = new AtomicBoolean();
IndexSearcher contextSearcher = new IndexSearcher(new MultiReader()) {
protected void search(List<LeafReaderContext> leaves, Weight weight, Collector collector) throws IOException {
collected.set(true);
super.search(leaves, weight, collector);
}
};
QueryPhase.execute(context, contextSearcher);
assertEquals(0, context.queryResult().topDocs().totalHits);
assertFalse(collected.get());
context.parsedPostFilter(new ParsedQuery(new MatchNoDocsQuery()));
QueryPhase.execute(context, contextSearcher);
assertEquals(0, context.queryResult().topDocs().totalHits);
assertTrue(collected.get());
}
public void testMinScoreDisablesCountOptimization() throws Exception {
TestSearchContext context = new TestSearchContext(null);
context.parsedQuery(new ParsedQuery(new MatchAllDocsQuery()));
context.setSize(0);
context.setTask(new SearchTask(123L, "", "", "", null));
final AtomicBoolean collected = new AtomicBoolean();
IndexSearcher contextSearcher = new IndexSearcher(new MultiReader()) {
protected void search(List<LeafReaderContext> leaves, Weight weight, Collector collector) throws IOException {
collected.set(true);
super.search(leaves, weight, collector);
}
};
QueryPhase.execute(context, contextSearcher);
assertEquals(0, context.queryResult().topDocs().totalHits);
assertFalse(collected.get());
context.minimumScore(1);
QueryPhase.execute(context, contextSearcher);
assertEquals(0, context.queryResult().topDocs().totalHits);
assertTrue(collected.get());
}
}