/*
* 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.relational;
import com.facebook.presto.metadata.Signature;
import com.facebook.presto.spi.type.StandardTypes;
import com.google.common.collect.ImmutableList;
import org.testng.annotations.Test;
import static com.facebook.presto.metadata.FunctionKind.SCALAR;
import static com.facebook.presto.metadata.MetadataManager.createTestMetadataManager;
import static com.facebook.presto.metadata.Signature.internalOperator;
import static com.facebook.presto.spi.function.OperatorType.LESS_THAN;
import static com.facebook.presto.spi.type.BigintType.BIGINT;
import static com.facebook.presto.spi.type.BooleanType.BOOLEAN;
import static com.facebook.presto.spi.type.TypeSignature.parseTypeSignature;
import static com.facebook.presto.sql.relational.Expressions.constant;
import static com.facebook.presto.sql.relational.Expressions.field;
import static java.util.Collections.singletonList;
import static org.testng.Assert.assertFalse;
import static org.testng.Assert.assertTrue;
public class TestDeterminismEvaluator
{
@Test
public void testDeterminismEvaluator()
throws Exception
{
DeterminismEvaluator determinismEvaluator = new DeterminismEvaluator(createTestMetadataManager().getFunctionRegistry());
CallExpression random = new CallExpression(
new Signature(
"random",
SCALAR,
parseTypeSignature(StandardTypes.BIGINT),
parseTypeSignature(StandardTypes.BIGINT)),
BIGINT,
singletonList(constant(10L, BIGINT)));
assertFalse(determinismEvaluator.isDeterministic(random));
InputReferenceExpression col0 = field(0, BIGINT);
Signature lessThan = internalOperator(LESS_THAN, BOOLEAN, ImmutableList.of(BIGINT, BIGINT));
CallExpression lessThanExpression = new CallExpression(lessThan, BOOLEAN, ImmutableList.of(col0, constant(10L, BIGINT)));
assertTrue(determinismEvaluator.isDeterministic(lessThanExpression));
CallExpression lessThanRandomExpression = new CallExpression(lessThan, BOOLEAN, ImmutableList.of(col0, random));
assertFalse(determinismEvaluator.isDeterministic(lessThanRandomExpression));
}
}