| /* |
| * 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.pig.test; |
| |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.HashSet; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Properties; |
| import java.util.Set; |
| |
| import org.apache.pig.EvalFunc; |
| import org.apache.pig.ExecType; |
| import org.apache.pig.PigServer; |
| import org.apache.pig.backend.hadoop.datastorage.ConfigurationUtil; |
| import org.apache.pig.data.SchemaTupleBackend; |
| import org.apache.pig.data.Tuple; |
| import org.apache.pig.impl.PigContext; |
| import org.apache.pig.impl.logicalLayer.FrontendException; |
| import org.apache.pig.newplan.Operator; |
| import org.apache.pig.newplan.OperatorPlan; |
| import org.apache.pig.newplan.logical.expression.ConstantExpression; |
| import org.apache.pig.newplan.logical.expression.NegativeExpression; |
| import org.apache.pig.newplan.logical.optimizer.LogicalPlanOptimizer; |
| import org.apache.pig.newplan.logical.relational.LOSplitOutput; |
| import org.apache.pig.newplan.logical.relational.LogicalPlan; |
| import org.apache.pig.newplan.logical.rules.FilterConstantCalculator; |
| import org.apache.pig.newplan.logical.rules.ForEachConstantCalculator; |
| import org.apache.pig.newplan.logical.rules.SplitConstantCalculator; |
| import org.apache.pig.newplan.optimizer.PlanOptimizer; |
| import org.apache.pig.newplan.optimizer.Rule; |
| import org.junit.Assert; |
| import org.junit.Before; |
| import org.junit.Test; |
| |
| public class TestConstantCalculator { |
| PigContext pc = null; |
| PigServer pigServer = null; |
| |
| @Before |
| public void setUp() throws Exception { |
| pigServer = new PigServer(ExecType.LOCAL, new Properties()); |
| pc = pigServer.getPigContext(); |
| SchemaTupleBackend.initialize(ConfigurationUtil.toConfiguration(pc.getProperties(), true), |
| pc); |
| } |
| |
| @Test |
| public void test() throws Exception { |
| // pure simple constant |
| assertQuerySame("b = filter (load 'd.txt' as (id:int, v1, v2)) by id > 3+5;" + |
| "store b into 'empty';", |
| "b = filter (load 'd.txt' as (id:int, v1, v2)) by id > 8;" + |
| "store b into 'empty';"); |
| |
| // simple constant mixed with column |
| assertQuerySame("b = foreach (load 'd.txt' as (id:int, v1, v2)) generate id * (3 * 5);" + |
| "store b into 'empty';", |
| "b = foreach (load 'd.txt' as (id:int, v1, v2)) generate id * 15;" + |
| "store b into 'empty';"); |
| |
| // boolean constant calculation |
| assertQuerySame("b = filter (load 'd.txt' as (id:int, v1, v2)) by 5 + 1 > 3 and -1 < 4;" + |
| "store b into 'empty';", |
| "b = filter (load 'd.txt' as (id:int, v1, v2)) by true;" + |
| "store b into 'empty';"); |
| |
| // simple cast |
| assertQuerySame("b = foreach (load 'd.txt' as (d:double)) generate (int)5.0;" + |
| "store b into 'empty';", |
| "b = foreach (load 'd.txt' as (d:double)) generate 5;" + |
| "store b into 'empty';"); |
| |
| // more calculation |
| assertQuerySame("b = foreach (load 'd.txt' as (d:double)) generate ((int)15.89 + 5) * 5 / 25 % 3;" + |
| "store b into 'empty';", |
| "b = foreach (load 'd.txt' as (d:double)) generate 1;" + |
| "store b into 'empty';"); |
| |
| // udf calculation |
| assertQuerySame("b = foreach (load 'd.txt' as (v1)) generate UPPER(CONCAT('a', CONCAT('b', 'c'), 'd'));" + |
| "store b into 'empty';", |
| "b = foreach (load 'd.txt' as (v1)) generate 'ABCD';" + |
| "store b into 'empty';"); |
| |
| // udf not eligible for optimize |
| assertQuerySame("b = foreach (load 'd.txt' as (v1)) generate " + NoCalc.class.getName() + "('2');" + |
| "store b into 'empty';", |
| "b = foreach (load 'd.txt' as (v1)) generate " + NoCalc.class.getName() + "('2');" + |
| "store b into 'empty';"); |
| |
| // solo udf |
| assertQuerySame("b = foreach (load 'd.txt' as (v1)) generate " + StringSpecified.class.getName() + "();" + |
| "store b into 'empty';", |
| "b = foreach (load 'd.txt' as (v1)) generate '1';" + |
| "store b into 'empty';"); |
| } |
| |
| @Test |
| public void testSplit() throws Exception { |
| // calculation inside split |
| LogicalPlan plan = getOptimizedLogicalPlan("a = load 'd.txt' as (x:long);" + |
| "split a into b if x == -2L, c otherwise;" + |
| "store b into 'empty';" + |
| "store c into 'empty1';"); |
| |
| List<ConstantExpression> constantOps = new ArrayList<>(); |
| Iterator<Operator> operators = plan.getOperators(); |
| while (operators.hasNext()) { |
| Operator splitOp = operators.next(); |
| if (splitOp instanceof LOSplitOutput) { |
| Iterator<Operator> splitOperators = ((LOSplitOutput)splitOp).getFilterPlan().getOperators(); |
| while (splitOperators.hasNext()) { |
| Operator op = splitOperators.next(); |
| if (op instanceof ConstantExpression) { |
| constantOps.add((ConstantExpression)op); |
| } else if (op instanceof NegativeExpression) { |
| Assert.fail("Found NegativeExpression which should have been optimized"); |
| } |
| } |
| } |
| |
| } |
| Assert.assertEquals(2, constantOps.size()); |
| Assert.assertEquals(new Long(-2L), constantOps.get(0).getValue()); |
| Assert.assertEquals(new Long(-2L), constantOps.get(1).getValue()); |
| } |
| |
| public static class NoCalc extends EvalFunc<String> { |
| @Override |
| public String exec(Tuple input) throws IOException { |
| return "1"; |
| } |
| } |
| |
| public static class StringSpecified extends EvalFunc<String> { |
| @Override |
| public String exec(Tuple input) throws IOException { |
| return "1"; |
| } |
| @Override |
| public boolean allowCompileTimeCalculation() { |
| return true; |
| } |
| } |
| |
| private void assertQuerySame(String origQuery, String optimizedQuery) throws Exception { |
| LogicalPlan newLogicalPlan = getOptimizedLogicalPlan(origQuery); |
| |
| LogicalPlan expected = Util.buildLp(pigServer, optimizedQuery); |
| |
| assertTrue(expected.isEqual(newLogicalPlan)); |
| |
| } |
| |
| private LogicalPlan getOptimizedLogicalPlan(String origQuery) |
| throws Exception, IOException, FrontendException { |
| LogicalPlan newLogicalPlan = Util.buildLp(pigServer, origQuery); |
| |
| SchemaTupleBackend.initialize(ConfigurationUtil.toConfiguration(pc.getProperties(), true), |
| pc); |
| PlanOptimizer optimizer = new MyPlanOptimizer(newLogicalPlan, 10); |
| optimizer.optimize(); |
| return newLogicalPlan; |
| } |
| |
| public class MyPlanOptimizer extends LogicalPlanOptimizer { |
| |
| protected MyPlanOptimizer(OperatorPlan p, int iterations) { |
| super(p, iterations, null); |
| } |
| |
| @Override |
| protected List<Set<Rule>> buildRuleSets() { |
| List<Set<Rule>> ls = new ArrayList<Set<Rule>>(); |
| |
| // Logical expression simplifier |
| Set <Rule> s = new HashSet<Rule>(); |
| // add constant calculator rule |
| Rule r = new FilterConstantCalculator("FilterConstantCalculator", pc); |
| s.add(r); |
| r = new ForEachConstantCalculator("ForEachConstantCalculator", pc); |
| s.add(r); |
| ls.add(s); |
| r = new SplitConstantCalculator("SplitConstantCalculator", pc); |
| s.add(r); |
| ls.add(s); |
| |
| return ls; |
| } |
| } |
| } |