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Posted to commits@lucene.apache.org by jp...@apache.org on 2015/08/21 09:17:02 UTC
svn commit: r1696900 - in /lucene/dev/trunk/lucene: CHANGES.txt
core/src/java/org/apache/lucene/search/UsageTrackingQueryCachingPolicy.java
core/src/test/org/apache/lucene/search/TestUsageTrackingFilterCachingPolicy.java
Author: jpountz
Date: Fri Aug 21 07:17:01 2015
New Revision: 1696900
URL: http://svn.apache.org/r1696900
Log:
LUCENE-6748: Never cache MatchAllDocsQuery and other cheap queries.
Modified:
lucene/dev/trunk/lucene/CHANGES.txt
lucene/dev/trunk/lucene/core/src/java/org/apache/lucene/search/UsageTrackingQueryCachingPolicy.java
lucene/dev/trunk/lucene/core/src/test/org/apache/lucene/search/TestUsageTrackingFilterCachingPolicy.java
Modified: lucene/dev/trunk/lucene/CHANGES.txt
URL: http://svn.apache.org/viewvc/lucene/dev/trunk/lucene/CHANGES.txt?rev=1696900&r1=1696899&r2=1696900&view=diff
==============================================================================
--- lucene/dev/trunk/lucene/CHANGES.txt (original)
+++ lucene/dev/trunk/lucene/CHANGES.txt Fri Aug 21 07:17:01 2015
@@ -81,6 +81,9 @@ Bug Fixes
* LUCENE-6745: RAMInputStream.clone was not thread safe (Mike McCandless)
+* LUCENE-6748: UsageTrackingQueryCachingPolicy no longer caches trivial queries
+ like MatchAllDocsQuery. (Adrien Grand)
+
Other
* LUCENE-6174: Improve "ant eclipse" to select right JRE for building.
Modified: lucene/dev/trunk/lucene/core/src/java/org/apache/lucene/search/UsageTrackingQueryCachingPolicy.java
URL: http://svn.apache.org/viewvc/lucene/dev/trunk/lucene/core/src/java/org/apache/lucene/search/UsageTrackingQueryCachingPolicy.java?rev=1696900&r1=1696899&r2=1696900&view=diff
==============================================================================
--- lucene/dev/trunk/lucene/core/src/java/org/apache/lucene/search/UsageTrackingQueryCachingPolicy.java (original)
+++ lucene/dev/trunk/lucene/core/src/java/org/apache/lucene/search/UsageTrackingQueryCachingPolicy.java Fri Aug 21 07:17:01 2015
@@ -123,6 +123,24 @@ public final class UsageTrackingQueryCac
@Override
public boolean shouldCache(Query query, LeafReaderContext context) throws IOException {
+ if (query instanceof MatchAllDocsQuery
+ // MatchNoDocsQuery currently rewrites to a BooleanQuery,
+ // but who knows, it might get its own Weight one day
+ || query instanceof MatchNoDocsQuery) {
+ return false;
+ }
+ if (query instanceof BooleanQuery) {
+ BooleanQuery bq = (BooleanQuery) query;
+ if (bq.clauses().isEmpty()) {
+ return false;
+ }
+ }
+ if (query instanceof DisjunctionMaxQuery) {
+ DisjunctionMaxQuery dmq = (DisjunctionMaxQuery) query;
+ if (dmq.getDisjuncts().isEmpty()) {
+ return false;
+ }
+ }
if (segmentPolicy.shouldCache(query, context) == false) {
return false;
}
Modified: lucene/dev/trunk/lucene/core/src/test/org/apache/lucene/search/TestUsageTrackingFilterCachingPolicy.java
URL: http://svn.apache.org/viewvc/lucene/dev/trunk/lucene/core/src/test/org/apache/lucene/search/TestUsageTrackingFilterCachingPolicy.java?rev=1696900&r1=1696899&r2=1696900&view=diff
==============================================================================
--- lucene/dev/trunk/lucene/core/src/test/org/apache/lucene/search/TestUsageTrackingFilterCachingPolicy.java (original)
+++ lucene/dev/trunk/lucene/core/src/test/org/apache/lucene/search/TestUsageTrackingFilterCachingPolicy.java Fri Aug 21 07:17:01 2015
@@ -17,6 +17,8 @@ package org.apache.lucene.search;
* limitations under the License.
*/
+import org.apache.lucene.index.MultiReader;
+import org.apache.lucene.index.SlowCompositeReaderWrapper;
import org.apache.lucene.index.Term;
import org.apache.lucene.util.LuceneTestCase;
@@ -41,4 +43,13 @@ public class TestUsageTrackingFilterCach
assertEquals(2, policy.frequency(q3));
}
+ public void testNeverCacheMatchAll() throws Exception {
+ Query q = new MatchAllDocsQuery();
+ UsageTrackingQueryCachingPolicy policy = new UsageTrackingQueryCachingPolicy();
+ for (int i = 0; i < 1000; ++i) {
+ policy.onUse(q);
+ }
+ assertFalse(policy.shouldCache(q, SlowCompositeReaderWrapper.wrap(new MultiReader()).getContext()));
+ }
+
}