/*
* Licensed to CRATE Technology GmbH ("Crate") under one or more contributor
* license agreements. See the NOTICE file distributed with this work for
* additional information regarding copyright ownership. Crate 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.
*
* However, if you have executed another commercial license agreement
* with Crate these terms will supersede the license and you may use the
* software solely pursuant to the terms of the relevant commercial agreement.
*/
package io.crate.operation.merge;
import io.crate.executor.transport.TransportActionProvider;
import io.crate.metadata.*;
import io.crate.operation.ImplementationSymbolVisitor;
import io.crate.operation.aggregation.AggregationFunction;
import io.crate.operation.aggregation.impl.AggregationImplModule;
import io.crate.operation.aggregation.impl.MinimumAggregation;
import io.crate.operation.projectors.TopN;
import io.crate.planner.RowGranularity;
import io.crate.planner.node.dql.MergeNode;
import io.crate.planner.projection.GroupProjection;
import io.crate.planner.projection.Projection;
import io.crate.planner.projection.TopNProjection;
import io.crate.planner.symbol.Aggregation;
import io.crate.planner.symbol.DataTypeSymbol;
import io.crate.planner.symbol.InputColumn;
import io.crate.planner.symbol.Symbol;
import io.crate.types.DataType;
import io.crate.types.DataTypes;
import org.elasticsearch.client.Client;
import org.elasticsearch.cluster.ClusterService;
import org.elasticsearch.common.inject.AbstractModule;
import org.elasticsearch.common.inject.Injector;
import org.elasticsearch.common.inject.ModulesBuilder;
import org.elasticsearch.common.settings.ImmutableSettings;
import org.junit.Before;
import org.junit.Test;
import org.mockito.Answers;
import java.util.Arrays;
import java.util.Collections;
import static junit.framework.TestCase.assertTrue;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.is;
import static org.mockito.Mockito.mock;
public class MergeOperationTest {
private GroupProjection groupProjection;
private AggregationFunction<MinimumAggregation.MinimumAggState> minAggFunction;
private ImplementationSymbolVisitor symbolVisitor;
private Injector injector;
@Before
@SuppressWarnings("unchecked")
public void prepare() {
injector = new ModulesBuilder()
.add(new AggregationImplModule())
.add(new AbstractModule() {
@Override
protected void configure() {
bind(Client.class).toInstance(mock(Client.class));
}
})
.createInjector();
Functions functions = injector.getInstance(Functions.class);
ReferenceResolver referenceResolver = new GlobalReferenceResolver(Collections.<ReferenceIdent, ReferenceImplementation>emptyMap());
symbolVisitor = new ImplementationSymbolVisitor(referenceResolver, functions, RowGranularity.NODE);
FunctionIdent minAggIdent = new FunctionIdent(MinimumAggregation.NAME, Arrays.<DataType>asList(DataTypes.DOUBLE));
FunctionInfo minAggInfo = new FunctionInfo(minAggIdent, DataTypes.DOUBLE);
minAggFunction = (AggregationFunction<MinimumAggregation.MinimumAggState>) functions.get(minAggIdent);
groupProjection = new GroupProjection();
groupProjection.keys(Arrays.<DataTypeSymbol>asList(new InputColumn(0, DataTypes.INTEGER)));
groupProjection.values(Arrays.asList(
new Aggregation(minAggInfo, Arrays.<Symbol>asList(new InputColumn(1)),
Aggregation.Step.PARTIAL, Aggregation.Step.FINAL)
));
}
@Test
public void testMergeSingleResult() throws Exception {
TopNProjection topNProjection = new TopNProjection(3, TopN.NO_OFFSET,
Arrays.<Symbol>asList(new InputColumn(0)), new boolean[]{false}, new Boolean[] { null });
topNProjection.outputs(Arrays.<Symbol>asList(new InputColumn(0), new InputColumn(1)));
MergeNode mergeNode = new MergeNode("merge", 2); // no need for inputTypes here
mergeNode.projections(Arrays.asList(
groupProjection,
topNProjection
));
MergeOperation mergeOperation = new MergeOperation(
mock(ClusterService.class),
ImmutableSettings.EMPTY,
mock(TransportActionProvider.class, Answers.RETURNS_DEEP_STUBS.get()),
symbolVisitor,
mergeNode
);
Object[][] rows = new Object[20][];
for (int i=0; i<rows.length; i++) {
MinimumAggregation.MinimumAggState aggState = minAggFunction.newState();
aggState.setValue(i+0.5d);
rows[i] = new Object[]{ i%4, aggState};
}
assertTrue(mergeOperation.addRows(rows));
mergeOperation.finished();
Object[][] mergeResult = mergeOperation.result().get();
assertThat(mergeResult.length, is(3));
assertThat((Integer)mergeResult[0][0], is(0));
assertThat((Double)mergeResult[0][1], is(0.5d));
assertThat((Integer)mergeResult[1][0], is(1));
assertThat((Double)mergeResult[1][1], is(1.5d));
assertThat((Integer)mergeResult[2][0], is(2));
assertThat((Double)mergeResult[2][1], is(2.5d));
}
@Test
public void testMergeMultipleResults() throws Exception {
MergeNode mergeNode = new MergeNode("merge", 2); // no need for inputTypes here
mergeNode.projections(Arrays.<Projection>asList(
groupProjection
));
MergeOperation mergeOperation = new MergeOperation(
mock(ClusterService.class),
ImmutableSettings.EMPTY,
mock(TransportActionProvider.class, Answers.RETURNS_DEEP_STUBS.get()),
symbolVisitor,
mergeNode
);
Object[][] rows = new Object[1][];
MinimumAggregation.MinimumAggState aggState = minAggFunction.newState();
aggState.setValue(100.0d);
rows[0] = new Object[]{0, aggState};
assertTrue(mergeOperation.addRows(rows));
Object[][] otherRows = new Object[1][];
MinimumAggregation.MinimumAggState otherAggState = minAggFunction.newState();
otherAggState.setValue(2.5d);
otherRows[0] = new Object[]{0, otherAggState};
assertTrue(mergeOperation.addRows(otherRows));
mergeOperation.finished();
Object[][] mergeResult = mergeOperation.result().get();
assertThat(mergeResult.length, is(1));
assertThat((Integer)mergeResult[0][0], is(0));
assertThat((Double)mergeResult[0][1], is(2.5d));
}
}