| /* |
| * 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.parser; |
| |
| import java.io.IOException; |
| import java.util.Properties; |
| |
| import org.junit.Assert; |
| |
| import org.antlr.runtime.RecognitionException; |
| import org.apache.pig.ExecType; |
| import org.apache.pig.impl.PigContext; |
| import org.apache.pig.newplan.logical.relational.LogicalPlan; |
| import org.apache.pig.newplan.logical.visitor.ScalarVisitor; |
| |
| import org.junit.Test; |
| |
| public class TestScalarVisitor { |
| |
| @Test |
| public void test1() throws RecognitionException, ParsingFailureException, IOException { |
| String query = "A = load 'x'; " + |
| "B = load 'y' as ( u : int, v : chararray );" + |
| "C = foreach A generate B.$1, $0; " + |
| "D = store C into 'output';"; |
| LogicalPlan plan = visit( query ); |
| Assert.assertEquals( 2, plan.getSources().size() ); // There should be two LOLoad op in the plan. |
| Assert.assertEquals( 2, plan.getSinks().size() ); // There should be also two LOStore op in the plan. |
| System.out.println( "New Logical Plan after scalar processing: " + plan ); |
| } |
| |
| @Test |
| public void test2() throws RecognitionException, ParsingFailureException, IOException { |
| String query = "A = load 'x'; " + |
| "B = load 'y' as ( u : int, v : chararray );" + |
| "C = foreach A generate B.v, $0; " + |
| "D = store C into 'output';"; |
| LogicalPlan plan = visit( query ); |
| Assert.assertEquals( 2, plan.getSources().size() ); // There should be two LOLoad op in the plan. |
| Assert.assertEquals( 2, plan.getSinks().size() ); // There should be also two LOStore op in the plan. |
| System.out.println( "New Logical Plan after scalar processing: " + plan ); |
| } |
| |
| @Test // PIG-2000 |
| public void test3() throws Exception, ParsingFailureException, IOException { |
| String query = "A = load 'x' as ( u:tuple(x:int, y:chararray), v:long, w:bytearray);\n" + |
| "B = load 'y';\n" + |
| "C = foreach B generate $0, A.u.x;\n" + |
| "D = store C into 'output';"; |
| LogicalPlan plan = visit( query ); |
| Assert.assertEquals( 2, plan.getSources().size() ); // There should be two LOLoad op in the plan. |
| Assert.assertEquals( 2, plan.getSinks().size() ); // There should be also two LOStore op in the plan. |
| System.out.println( "New Logical Plan after scalar processing: " + plan ); |
| } |
| |
| @Test |
| public void testNegative1() throws RecognitionException, ParsingFailureException, IOException { |
| String query = "A = load 'x'; " + |
| "B = load 'y' as ( u : int, v : chararray );" + |
| "C = foreach A generate B.w, $0; " + |
| "D = store C into 'output';"; |
| try { |
| visit( query ); |
| } catch(Exception ex) { |
| Assert.assertTrue( ex instanceof InvalidScalarProjectionException ); |
| return; |
| } |
| Assert.fail( "Test case should fail" ); |
| } |
| |
| private LogicalPlan visit(String query) throws RecognitionException, ParsingFailureException, IOException { |
| LogicalPlan plan = ParserTestingUtils.generateLogicalPlan( query ); |
| PigContext pc = new PigContext( ExecType.LOCAL, new Properties() ); |
| pc.connect(); |
| ScalarVisitor visitor = new ScalarVisitor(plan, pc, "test"); |
| visitor.visit(); |
| return plan; |
| } |
| |
| } |