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Posted to commits@jena.apache.org by an...@apache.org on 2015/06/02 12:41:07 UTC
[4/6] jena git commit: Note that TopN limit must be less than the
spill-to-disk for Distinct.
Note that TopN limit must be less than the spill-to-disk for Distinct.
Project: http://git-wip-us.apache.org/repos/asf/jena/repo
Commit: http://git-wip-us.apache.org/repos/asf/jena/commit/a5f3c8e2
Tree: http://git-wip-us.apache.org/repos/asf/jena/tree/a5f3c8e2
Diff: http://git-wip-us.apache.org/repos/asf/jena/diff/a5f3c8e2
Branch: refs/heads/master
Commit: a5f3c8e2254d3594a56c01c945b257cbce7d48c8
Parents: 244ebeb
Author: Andy Seaborne <an...@apache.org>
Authored: Tue Jun 2 11:34:08 2015 +0100
Committer: Andy Seaborne <an...@apache.org>
Committed: Tue Jun 2 11:34:08 2015 +0100
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.../org/apache/jena/sparql/algebra/optimize/TransformTopN.java | 2 ++
1 file changed, 2 insertions(+)
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http://git-wip-us.apache.org/repos/asf/jena/blob/a5f3c8e2/jena-arq/src/main/java/org/apache/jena/sparql/algebra/optimize/TransformTopN.java
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diff --git a/jena-arq/src/main/java/org/apache/jena/sparql/algebra/optimize/TransformTopN.java b/jena-arq/src/main/java/org/apache/jena/sparql/algebra/optimize/TransformTopN.java
index 56c2f08..2c49133 100644
--- a/jena-arq/src/main/java/org/apache/jena/sparql/algebra/optimize/TransformTopN.java
+++ b/jena-arq/src/main/java/org/apache/jena/sparql/algebra/optimize/TransformTopN.java
@@ -40,6 +40,8 @@ import org.apache.jena.sparql.util.Symbol ;
*/
public class TransformTopN extends TransformCopy {
+ // This must be less than ARQ.spillToDiskThreshold.
+ // Otherwise DISTINCT ends up reordering.
private static final int defaultTopNSortingThreshold = 1000;
public static final Symbol externalSortBufferSize = ARQConstants.allocSymbol("topNSortingThreshold") ;