ihuzenko commented on a change in pull request #1929: DRILL-6832: Remove the
old "unmanaged" external sort
URL: https://github.com/apache/drill/pull/1929#discussion_r360507467
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/physical/impl/xsort/MSortTemplate.java
##########
@@ -17,48 +17,59 @@
*/
package org.apache.drill.exec.physical.impl.xsort;
-import com.typesafe.config.ConfigException;
-import io.netty.buffer.DrillBuf;
-
import java.util.Queue;
import javax.inject.Named;
-import org.apache.drill.exec.ExecConstants;
import org.apache.drill.exec.exception.SchemaChangeException;
import org.apache.drill.exec.memory.BaseAllocator;
import org.apache.drill.exec.memory.BufferAllocator;
import org.apache.drill.exec.ops.FragmentContext;
import org.apache.drill.exec.record.RecordBatch;
import org.apache.drill.exec.record.VectorContainer;
import org.apache.drill.exec.record.selection.SelectionVector4;
-import org.apache.drill.exec.vector.ValueVector;
import org.apache.hadoop.util.IndexedSortable;
import org.apache.drill.shaded.guava.com.google.common.base.Preconditions;
import org.apache.drill.shaded.guava.com.google.common.collect.Queues;
+import io.netty.buffer.DrillBuf;
+
public abstract class MSortTemplate implements MSorter, IndexedSortable {
// private static final org.slf4j.Logger logger =
org.slf4j.LoggerFactory.getLogger(MSortTemplate.class);
private SelectionVector4 vector4;
private SelectionVector4 aux;
+ @SuppressWarnings("unused")
+ private long compares;
+
+ /**
+ * Holds offsets into the SV4 of the start of each batch
+ * (sorted run.)
+ */
+
Review comment:
```suggestion
```
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