/*
* Licensed 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.
*/
package com.facebook.presto.sql.planner.optimizations;
import com.facebook.presto.metadata.FunctionKind;
import com.facebook.presto.metadata.Signature;
import com.facebook.presto.spi.type.StandardTypes;
import com.facebook.presto.sql.planner.PlanNodeIdAllocator;
import com.facebook.presto.sql.planner.Symbol;
import com.facebook.presto.sql.planner.SymbolAllocator;
import com.facebook.presto.sql.planner.plan.AggregationNode;
import com.facebook.presto.sql.planner.plan.Assignments;
import com.facebook.presto.sql.planner.plan.ProjectNode;
import com.facebook.presto.sql.planner.plan.ValuesNode;
import com.facebook.presto.sql.tree.FunctionCall;
import com.facebook.presto.sql.tree.Identifier;
import com.facebook.presto.sql.tree.LongLiteral;
import com.facebook.presto.sql.tree.QualifiedName;
import com.facebook.presto.sql.tree.SymbolReference;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import org.testng.annotations.Test;
import java.util.Optional;
import static com.facebook.presto.SessionTestUtils.TEST_SESSION;
import static com.facebook.presto.spi.type.TypeSignature.parseTypeSignature;
import static org.testng.Assert.assertFalse;
import static org.testng.Assert.assertTrue;
public class TestCountConstantOptimizer
{
@Test
public void testCountConstantOptimizer()
throws Exception
{
CountConstantOptimizer optimizer = new CountConstantOptimizer();
PlanNodeIdAllocator planNodeIdAllocator = new PlanNodeIdAllocator();
Symbol countAggregationSymbol = new Symbol("count");
Signature countAggregationSignature = new Signature("count", FunctionKind.AGGREGATE, parseTypeSignature(StandardTypes.BIGINT), parseTypeSignature(StandardTypes.BIGINT));
ImmutableMap<Symbol, FunctionCall> aggregations = ImmutableMap.of(countAggregationSymbol, new FunctionCall(QualifiedName.of("count"), ImmutableList.of(new SymbolReference("expr"))));
ImmutableMap<Symbol, Signature> functions = ImmutableMap.of(countAggregationSymbol, countAggregationSignature);
ValuesNode valuesNode = new ValuesNode(planNodeIdAllocator.getNextId(), ImmutableList.of(new Symbol("col")), ImmutableList.of(ImmutableList.of()));
AggregationNode eligiblePlan = new AggregationNode(
planNodeIdAllocator.getNextId(),
new ProjectNode(
planNodeIdAllocator.getNextId(),
valuesNode,
Assignments.of(new Symbol("expr"), new LongLiteral("42"))),
aggregations,
functions,
ImmutableMap.of(),
ImmutableList.of(ImmutableList.of()),
AggregationNode.Step.INTERMEDIATE,
Optional.empty(),
Optional.empty());
assertTrue(((AggregationNode) optimizer.optimize(eligiblePlan, TEST_SESSION, ImmutableMap.of(), new SymbolAllocator(), new PlanNodeIdAllocator()))
.getAggregations()
.get(countAggregationSymbol)
.getArguments()
.isEmpty());
AggregationNode ineligiblePlan = new AggregationNode(
planNodeIdAllocator.getNextId(),
new ProjectNode(
planNodeIdAllocator.getNextId(),
valuesNode,
Assignments.of(new Symbol("expr"), new FunctionCall(QualifiedName.of("function"), ImmutableList.of(new Identifier("x"))))),
aggregations,
functions,
ImmutableMap.of(),
ImmutableList.of(ImmutableList.of()),
AggregationNode.Step.INTERMEDIATE,
Optional.empty(),
Optional.empty());
assertFalse(((AggregationNode) optimizer.optimize(ineligiblePlan, TEST_SESSION, ImmutableMap.of(), new SymbolAllocator(), new PlanNodeIdAllocator()))
.getAggregations()
.get(countAggregationSymbol)
.getArguments()
.isEmpty());
}
}