| /* |
| * 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.drill; |
| |
| import org.apache.drill.categories.PlannerTest; |
| import org.apache.drill.test.BaseTestQuery; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| @Category(PlannerTest.class) |
| public class TestSelectivity extends BaseTestQuery { |
| static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(TestSelectivity.class); |
| |
| @Test |
| public void testFilterSelectivityOptions() throws Exception { |
| |
| /* Tests to check setting options works as expected */ |
| test(String.format("alter system set `planner.filter.min_selectivity_estimate_factor` = %f", 0.25)); |
| test(String.format("alter system set `planner.filter.max_selectivity_estimate_factor` = %f", 0.75)); |
| |
| String query1 = String.format("alter session set `planner.filter.min_selectivity_estimate_factor` = %f", -0.5); |
| String errMsg1 = "Option planner.filter.min_selectivity_estimate_factor must be between 0.000000 and 1.000000"; |
| BaseTestQuery.errorMsgTestHelper(query1, errMsg1); |
| |
| String query2 = String.format("alter session set `planner.filter.min_selectivity_estimate_factor` = %f", 0.85); |
| String errMsg2 = "Option planner.filter.min_selectivity_estimate_factor must be less than or equal to" |
| + " Option planner.filter.max_selectivity_estimate_factor"; |
| BaseTestQuery.errorMsgTestHelper(query2, errMsg2); |
| |
| String query3 = String.format("alter session set `planner.filter.max_selectivity_estimate_factor` = %f", 1.5); |
| String errMsg3 = "Option planner.filter.max_selectivity_estimate_factor must be between 0.000000 and 1.000000"; |
| BaseTestQuery.errorMsgTestHelper(query3, errMsg3); |
| |
| String query4 = String.format("alter session set `planner.filter.max_selectivity_estimate_factor` = %f", 0.15); |
| String errMsg4 = "Option planner.filter.max_selectivity_estimate_factor must be greater than or equal to" |
| + " Option planner.filter.min_selectivity_estimate_factor"; |
| BaseTestQuery.errorMsgTestHelper(query4, errMsg4); |
| |
| test(String.format("alter session set `planner.filter.max_selectivity_estimate_factor` = %f", 1.0)); |
| test(String.format("alter session set `planner.filter.min_selectivity_estimate_factor` = %f", 0.9)); |
| /* End of tests to check setting options */ |
| |
| /* Capping the selectivity prevents underestimation of filtered rows */ |
| String query = " select employee_id from cp.`employee.json` where employee_id < 10 and department_id > 5"; |
| |
| test(String.format("alter session set `planner.filter.min_selectivity_estimate_factor` = %f", 0.1)); |
| final String[] expectedPlan1 = {"Filter\\(condition.*\\).*rowcount = 115.75,.*", |
| "Scan.*columns=\\[`employee_id`, `department_id`\\].*rowcount = 463.0.*"}; |
| PlanTestBase.testPlanWithAttributesMatchingPatterns(query, expectedPlan1, new String[]{}); |
| |
| test(String.format("alter session set `planner.filter.min_selectivity_estimate_factor` = %f", 0.7)); |
| final String[] expectedPlan2 = {"Filter\\(condition.*\\).*rowcount = 324.0.*", |
| "Scan.*columns=\\[`employee_id`, `department_id`\\].*rowcount = 463.0.*"}; |
| PlanTestBase.testPlanWithAttributesMatchingPatterns(query, expectedPlan2, new String[]{}); |
| } |
| } |