Remove null and empty fields from native queries

codestyle/spotbugs-exclude.xml

@@ -46,7 +46,10 @@
             <Or>
                 <Class name="org.apache.druid.query.scan.ScanQuery$ScanRowsLimitJsonIncludeFilter"/>
                 <Class name="org.apache.druid.query.scan.ScanQuery$ScanTimeOrderJsonIncludeFilter"/>
+                <Class name="org.apache.druid.query.scan.ScanQuery$BatchSizeJsonIncludeFilter"/>
+                <Class name="org.apache.druid.query.scan.ScanQuery$IsLegacyJsonIncludeFilter"/>
                 <Class name="org.apache.druid.query.groupby.orderby.DefaultLimitSpec$LimitJsonIncludeFilter"/>
+                <Class name="org.apache.druid.segment.VirtualColumns$JsonIncludeFilter"/>
             </Or>
         </And>
     </Match>
@@ -56,6 +59,12 @@
             <Class name="org.apache.druid.server.AsyncQueryForwardingServlet" />
         </And>
     </Match>
+    <Match>
+        <And>
+            <Bug pattern="URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD" />
+            <Class name="org.apache.druid.sql.calcite.planner.CapturedState" />
+        </And>
+    </Match>
 
     <Bug pattern="AT_OPERATION_SEQUENCE_ON_CONCURRENT_ABSTRACTION"/>
     <Bug pattern="BC_UNCONFIRMED_CAST"/>

core/src/test/java/org/apache/druid/java/util/emitter/core/EmitterTest.java

@@ -90,7 +90,6 @@ private static Response.ResponseBuilder responseBuilder(HttpVersion version, Htt
     return builder;
   }
 
-
   MockHttpClient httpClient;
   HttpPostEmitter emitter;
 

indexing-service/src/test/java/org/apache/druid/indexing/common/task/CompactionTaskParallelRunTest.java

@@ -164,7 +164,6 @@ public void testRunParallelWithDynamicPartitioningMatchCompactionState() throws
       expectedLongSumMetric.put("type", "longSum");
       expectedLongSumMetric.put("name", "val");
       expectedLongSumMetric.put("fieldName", "val");
-      expectedLongSumMetric.put("expression", null);
       CompactionState expectedState = new CompactionState(
           new DynamicPartitionsSpec(null, Long.MAX_VALUE),
           new DimensionsSpec(DimensionsSpec.getDefaultSchemas(ImmutableList.of("ts", "dim"))),
@@ -211,7 +210,6 @@ public void testRunParallelWithHashPartitioningMatchCompactionState() throws Exc
       expectedLongSumMetric.put("type", "longSum");
       expectedLongSumMetric.put("name", "val");
       expectedLongSumMetric.put("fieldName", "val");
-      expectedLongSumMetric.put("expression", null);
       Assert.assertSame(HashBasedNumberedShardSpec.class, segment.getShardSpec().getClass());
       CompactionState expectedState = new CompactionState(
           new HashedPartitionsSpec(null, 3, null),
@@ -259,7 +257,6 @@ public void testRunParallelWithRangePartitioning() throws Exception
       expectedLongSumMetric.put("type", "longSum");
       expectedLongSumMetric.put("name", "val");
       expectedLongSumMetric.put("fieldName", "val");
-      expectedLongSumMetric.put("expression", null);
       Assert.assertSame(SingleDimensionShardSpec.class, segment.getShardSpec().getClass());
       CompactionState expectedState = new CompactionState(
           new SingleDimensionPartitionsSpec(7, null, "dim", false),
@@ -310,7 +307,6 @@ public void testRunParallelWithMultiDimensionRangePartitioning() throws Exceptio
       expectedLongSumMetric.put("type", "longSum");
       expectedLongSumMetric.put("name", "val");
       expectedLongSumMetric.put("fieldName", "val");
-      expectedLongSumMetric.put("expression", null);
       Assert.assertSame(DimensionRangeShardSpec.class, segment.getShardSpec().getClass());
       CompactionState expectedState = new CompactionState(
           new DimensionRangePartitionsSpec(7, null, Arrays.asList("dim1", "dim2"), false),
@@ -358,7 +354,6 @@ public void testRunParallelWithRangePartitioningWithSingleTask() throws Exceptio
       expectedLongSumMetric.put("type", "longSum");
       expectedLongSumMetric.put("name", "val");
       expectedLongSumMetric.put("fieldName", "val");
-      expectedLongSumMetric.put("expression", null);
       Assert.assertSame(SingleDimensionShardSpec.class, segment.getShardSpec().getClass());
       CompactionState expectedState = new CompactionState(
           new SingleDimensionPartitionsSpec(7, null, "dim", false),
@@ -409,7 +404,6 @@ public void testRunParallelWithMultiDimensionRangePartitioningWithSingleTask() t
       expectedLongSumMetric.put("type", "longSum");
       expectedLongSumMetric.put("name", "val");
       expectedLongSumMetric.put("fieldName", "val");
-      expectedLongSumMetric.put("expression", null);
       Assert.assertSame(DimensionRangeShardSpec.class, segment.getShardSpec().getClass());
       CompactionState expectedState = new CompactionState(
           new DimensionRangePartitionsSpec(7, null, Arrays.asList("dim1", "dim2"), false),
@@ -490,7 +484,6 @@ public void testRunCompactionWithFilterShouldStoreInState() throws Exception
       expectedLongSumMetric.put("type", "longSum");
       expectedLongSumMetric.put("name", "val");
       expectedLongSumMetric.put("fieldName", "val");
-      expectedLongSumMetric.put("expression", null);
       CompactionState expectedState = new CompactionState(
           new DynamicPartitionsSpec(null, Long.MAX_VALUE),
           new DimensionsSpec(DimensionsSpec.getDefaultSchemas(ImmutableList.of("ts", "dim"))),
@@ -545,7 +538,6 @@ public void testRunCompactionWithNewMetricsShouldStoreInState() throws Exception
       expectedLongSumMetric.put("type", "longSum");
       expectedLongSumMetric.put("name", "val");
       expectedLongSumMetric.put("fieldName", "val");
-      expectedLongSumMetric.put("expression", null);
       CompactionState expectedState = new CompactionState(
           new DynamicPartitionsSpec(null, Long.MAX_VALUE),
           new DimensionsSpec(DimensionsSpec.getDefaultSchemas(ImmutableList.of("ts", "dim"))),

indexing-service/src/test/java/org/apache/druid/indexing/common/task/CompactionTaskRunTest.java

@@ -202,7 +202,6 @@ public static CompactionState getDefaultCompactionState(Granularity segmentGranu
     expectedLongSumMetric.put("type", "longSum");
     expectedLongSumMetric.put("name", "val");
     expectedLongSumMetric.put("fieldName", "val");
-    expectedLongSumMetric.put("expression", null);
     return new CompactionState(
       new DynamicPartitionsSpec(5000000, Long.MAX_VALUE),
       new DimensionsSpec(DimensionsSpec.getDefaultSchemas(ImmutableList.of("ts", "dim"))),
@@ -355,7 +354,6 @@ public void testRunWithHashPartitioning() throws Exception
         expectedLongSumMetric.put("type", "longSum");
         expectedLongSumMetric.put("name", "val");
         expectedLongSumMetric.put("fieldName", "val");
-        expectedLongSumMetric.put("expression", null);
         CompactionState expectedState = new CompactionState(
             new HashedPartitionsSpec(null, 3, null),
             new DimensionsSpec(DimensionsSpec.getDefaultSchemas(ImmutableList.of("ts", "dim"))),
@@ -648,7 +646,6 @@ public void testCompactionWithFilterInTransformSpec() throws Exception
     expectedLongSumMetric.put("type", "longSum");
     expectedLongSumMetric.put("name", "val");
     expectedLongSumMetric.put("fieldName", "val");
-    expectedLongSumMetric.put("expression", null);
     CompactionState expectedCompactionState = new CompactionState(
         new DynamicPartitionsSpec(5000000, Long.MAX_VALUE),
         new DimensionsSpec(DimensionsSpec.getDefaultSchemas(ImmutableList.of("ts", "dim"))),
@@ -710,7 +707,6 @@ public void testCompactionWithNewMetricInMetricsSpec() throws Exception
     expectedLongSumMetric.put("type", "longSum");
     expectedLongSumMetric.put("name", "val");
     expectedLongSumMetric.put("fieldName", "val");
-    expectedLongSumMetric.put("expression", null);
     CompactionState expectedCompactionState = new CompactionState(
         new DynamicPartitionsSpec(5000000, Long.MAX_VALUE),
         new DimensionsSpec(DimensionsSpec.getDefaultSchemas(ImmutableList.of("ts", "dim"))),

indexing-service/src/test/java/org/apache/druid/indexing/overlord/RemoteTaskRunnerTest.java

@@ -115,9 +115,6 @@ protected void finished(Description description)
     }
   };
 
-
-
-
   @Rule
   public final TestRule timeout = new DeadlockDetectingTimeout(60, TimeUnit.SECONDS);
 

integration-tests/src/test/java/org/apache/druid/tests/coordinator/duty/ITAutoCompactionTest.java

@@ -117,7 +117,7 @@ public class ITAutoCompactionTest extends AbstractIndexerTest
   @BeforeMethod
   public void setup() throws Exception
   {
-    // Set comapction slot to 5
+    // Set compaction slot to 5
     updateCompactionTaskSlot(0.5, 10, null);
     fullDatasourceName = "wikipedia_index_test_" + UUID.randomUUID() + config.getExtraDatasourceNameSuffix();
   }
@@ -458,8 +458,8 @@ public void testAutoCompactionDutySubmitAndVerifyCompaction() throws Exception
           fullDatasourceName,
           AutoCompactionSnapshot.AutoCompactionScheduleStatus.RUNNING,
           0,
-          14906,
-          14905,
+          14762,
+          14761,
           0,
           2,
           2,
@@ -476,7 +476,7 @@ public void testAutoCompactionDutySubmitAndVerifyCompaction() throws Exception
           fullDatasourceName,
           AutoCompactionSnapshot.AutoCompactionScheduleStatus.RUNNING,
           0,
-          23372,
+          23156,
           0,
           0,
           3,
@@ -592,16 +592,16 @@ public void testAutoCompactionDutyCanUpdateTaskSlots() throws Exception
       getAndAssertCompactionStatus(
           fullDatasourceName,
           AutoCompactionSnapshot.AutoCompactionScheduleStatus.RUNNING,
-          14906,
-          14905,
+          14762,
+          14761,
           0,
           2,
           2,
           0,
           1,
           1,
           0);
-      Assert.assertEquals(compactionResource.getCompactionProgress(fullDatasourceName).get("remainingSegmentSize"), "14906");
+      Assert.assertEquals(compactionResource.getCompactionProgress(fullDatasourceName).get("remainingSegmentSize"), "14762");
       // Run compaction again to compact the remaining day
       // Remaining day compacted (1 new segment). Now both days compacted (2 total)
       forceTriggerAutoCompaction(2);
@@ -612,7 +612,7 @@ public void testAutoCompactionDutyCanUpdateTaskSlots() throws Exception
           fullDatasourceName,
           AutoCompactionSnapshot.AutoCompactionScheduleStatus.RUNNING,
           0,
-          23372,
+          23156,
           0,
           0,
           3,
@@ -645,7 +645,7 @@ public void testAutoCompactionDutyWithSegmentGranularityAndWithDropExistingTrue(
     //                             Four data segments (two months) and 10 tombstones for remaining months
     //      3d compaction: SEMESTER:  5 rows @ 2013-08-31 (two segments), 5 rows @ 2013-09-01 (two segments),
     //               2 compactions were generated for year 2013; one for each semester to be compacted of the whole year.
-    //               
+    //
     loadData(INDEX_TASK);
 
     try (final Closeable ignored = unloader(fullDatasourceName)) {

processing/src/main/java/org/apache/druid/query/BaseQuery.java

@@ -19,6 +19,8 @@
 
 package org.apache.druid.query;
 
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonInclude.Include;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.google.common.annotations.VisibleForTesting;
 import com.google.common.base.Preconditions;
@@ -101,6 +103,7 @@ public DataSource getDataSource()
 
   @JsonProperty
   @Override
+  @JsonInclude(Include.NON_DEFAULT)
   public boolean isDescending()
   {
     return descending;
@@ -165,6 +168,7 @@ public DateTimeZone getTimezone()
 
   @Override
   @JsonProperty
+  @JsonInclude(Include.NON_DEFAULT)
   public Map<String, Object> getContext()
   {
     return context.getMergedParams();

processing/src/main/java/org/apache/druid/query/JoinDataSource.java

@@ -21,6 +21,8 @@
 
 import com.fasterxml.jackson.annotation.JacksonInject;
 import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonInclude.Include;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableList;
@@ -33,6 +35,7 @@
 import org.apache.druid.segment.join.JoinType;
 
 import javax.annotation.Nullable;
+
 import java.util.HashSet;
 import java.util.List;
 import java.util.Objects;
@@ -176,6 +179,7 @@ public JoinType getJoinType()
 
   @JsonProperty
   @Nullable
+  @JsonInclude(Include.NON_NULL)
   public DimFilter getLeftFilter()
   {
     return leftFilter;

processing/src/main/java/org/apache/druid/query/QueryDataSource.java

@@ -34,7 +34,7 @@
 public class QueryDataSource implements DataSource
 {
   @JsonProperty
-  private final Query query;
+  private final Query<?> query;
 
   @JsonCreator
   public QueryDataSource(@JsonProperty("query") Query query)

processing/src/main/java/org/apache/druid/query/aggregation/ExpressionLambdaAggregatorFactory.java

@@ -21,6 +21,7 @@
 
 import com.fasterxml.jackson.annotation.JacksonInject;
 import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.google.common.base.Preconditions;
 import com.google.common.base.Supplier;
@@ -204,13 +205,15 @@ public String getName()
 
   @JsonProperty
   @Nullable
+  @JsonInclude(JsonInclude.Include.NON_EMPTY)
   public Set<String> getFields()
   {
     return fields;
   }
 
   @JsonProperty
   @Nullable
+  @JsonInclude(JsonInclude.Include.NON_NULL)
   public String getAccumulatorIdentifier()
   {
     return accumulatorId;
@@ -260,13 +263,15 @@ public String getCombineExpressionString()
 
   @JsonProperty("compare")
   @Nullable
+  @JsonInclude(JsonInclude.Include.NON_NULL)
   public String getCompareExpressionString()
   {
     return compareExpressionString;
   }
 
   @JsonProperty("finalize")
   @Nullable
+  @JsonInclude(JsonInclude.Include.NON_NULL)
   public String getFinalizeExpressionString()
   {
     return finalizeExpressionString;

processing/src/main/java/org/apache/druid/query/aggregation/PostAggregator.java

@@ -19,6 +19,8 @@
 
 package org.apache.druid.query.aggregation;
 
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonInclude.Include;
 import org.apache.druid.guice.annotations.ExtensionPoint;
 import org.apache.druid.java.util.common.Cacheable;
 import org.apache.druid.segment.ColumnInspector;
@@ -45,6 +47,7 @@ public interface PostAggregator extends Cacheable
   Object compute(Map<String, Object> combinedAggregators);
 
   @Nullable
+  @JsonInclude(Include.NON_NULL)
   String getName();
 
   /**

processing/src/main/java/org/apache/druid/query/aggregation/SimpleDoubleAggregatorFactory.java

@@ -20,6 +20,7 @@
 package org.apache.druid.query.aggregation;
 
 
+import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.google.common.base.Preconditions;
 import com.google.common.base.Supplier;
@@ -234,13 +235,15 @@ public String getName()
 
   @Nullable
   @JsonProperty
+  @JsonInclude(JsonInclude.Include.NON_NULL)
   public String getFieldName()
   {
     return fieldName;
   }
 
   @Nullable
   @JsonProperty
+  @JsonInclude(JsonInclude.Include.NON_NULL)
   public String getExpression()
   {
     return expression;

processing/src/main/java/org/apache/druid/query/aggregation/SimpleFloatAggregatorFactory.java

@@ -20,6 +20,7 @@
 package org.apache.druid.query.aggregation;
 
 
+import com.fasterxml.jackson.annotation.JsonInclude;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.google.common.base.Preconditions;
 import com.google.common.base.Supplier;
@@ -212,13 +213,15 @@ public String getName()
 
   @Nullable
   @JsonProperty
+  @JsonInclude(JsonInclude.Include.NON_NULL)
   public String getFieldName()
   {
     return fieldName;
   }
 
   @Nullable
   @JsonProperty
+  @JsonInclude(JsonInclude.Include.NON_NULL)
   public String getExpression()
   {
     return expression;