| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF 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. |
| */ |
| |
| package org.apache.wayang.jdbc.operators; |
| |
| |
| import org.apache.wayang.commons.util.profiledb.instrumentation.StopWatch; |
| import org.apache.wayang.commons.util.profiledb.model.Experiment; |
| import org.apache.wayang.commons.util.profiledb.model.Subject; |
| import org.junit.Assert; |
| import org.junit.Test; |
| import org.apache.wayang.core.api.Configuration; |
| import org.apache.wayang.core.api.Job; |
| import org.apache.wayang.core.optimizer.DefaultOptimizationContext; |
| import org.apache.wayang.core.optimizer.cardinality.CardinalityEstimate; |
| import org.apache.wayang.core.optimizer.cardinality.CardinalityEstimator; |
| import org.apache.wayang.jdbc.test.HsqldbPlatform; |
| import org.apache.wayang.jdbc.test.HsqldbTableSource; |
| |
| import java.sql.Connection; |
| import java.sql.SQLException; |
| import java.sql.Statement; |
| |
| import static org.mockito.Mockito.mock; |
| import static org.mockito.Mockito.when; |
| |
| /** |
| * Test suite for {@link SqlToStreamOperator}. |
| */ |
| public class JdbcTableSourceTest { |
| |
| @Test |
| public void testCardinalityEstimator() throws SQLException { |
| Job job = mock(Job.class); |
| DefaultOptimizationContext optimizationContext = mock(DefaultOptimizationContext.class); |
| when(job.getOptimizationContext()).thenReturn(optimizationContext); |
| when(optimizationContext.getJob()).thenReturn(job); |
| when(job.getStopWatch()).thenReturn(new StopWatch(new Experiment("mock", new Subject("mock", "mock")))); |
| when(optimizationContext.getConfiguration()).thenReturn(new Configuration()); |
| when(job.getConfiguration()).thenReturn(new Configuration()); |
| HsqldbPlatform hsqldbPlatform = new HsqldbPlatform(); |
| |
| // Create some test data. |
| try (Connection jdbcConnection = hsqldbPlatform.createDatabaseDescriptor(job.getConfiguration()).createJdbcConnection()) { |
| final Statement statement = jdbcConnection.createStatement(); |
| statement.execute("CREATE TABLE testCardinalityEstimator (a INT, b VARCHAR(6));"); |
| statement.execute("INSERT INTO testCardinalityEstimator VALUES (0, 'zero');"); |
| statement.execute("INSERT INTO testCardinalityEstimator VALUES (1, 'one');"); |
| statement.execute("INSERT INTO testCardinalityEstimator VALUES (2, 'two');"); |
| } |
| |
| JdbcTableSource tableSource = new HsqldbTableSource("testCardinalityEstimator"); |
| final CardinalityEstimator cardinalityEstimator = tableSource.getCardinalityEstimator(0); |
| |
| final CardinalityEstimate estimate = cardinalityEstimator.estimate(optimizationContext); |
| |
| Assert.assertEquals( |
| new CardinalityEstimate(3, 3, 1d), |
| estimate |
| ); |
| } |
| |
| } |