| /* |
| * 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 org.junit.Assert; |
| |
| import org.antlr.runtime.RecognitionException; |
| import org.apache.pig.impl.plan.PlanValidationException; |
| import org.apache.pig.newplan.logical.relational.LogicalPlan; |
| import org.apache.pig.newplan.logical.visitor.SchemaAliasVisitor; |
| |
| import org.junit.Test; |
| |
| public class TestSchemaAliasVisitor { |
| |
| @Test |
| public void test() throws RecognitionException, ParsingFailureException, IOException { |
| String query = "A = load 'x' as ( u:int, v:long, w:bytearray); " + |
| "B = foreach A generate u, v, $0 as x, u as z; " + |
| "C = store B into 'output';"; |
| validate( query ); |
| } |
| |
| @Test |
| public void testNegative1() throws RecognitionException, ParsingFailureException, IOException { |
| String query = "A = load 'x' as ( u:int, v:long, w:bytearray); " + |
| "B = foreach A generate $0, v, $0; " + |
| "C = store B into 'output';"; |
| try { |
| validate( query ); |
| } catch(PlanValidationException ex) { |
| Assert.assertTrue( ex.getMessage().contains( "Duplicate schema alias" ) ); |
| return; |
| } |
| Assert.fail( "Query should fail to validate." ); |
| } |
| |
| @Test |
| // See PIG-644 |
| public void testNegative2() throws RecognitionException, ParsingFailureException, IOException { |
| String query = "a = load '1.txt' as (a0:int, a1:int);" + |
| "b = foreach a generate a0, a1 as a0;" + |
| "c = store b into 'output';"; |
| try { |
| validate( query ); |
| } catch(PlanValidationException ex) { |
| Assert.assertTrue( ex.getMessage().contains( "Duplicate schema alias" ) ); |
| return; |
| } |
| Assert.fail( "Query should fail to validate." ); |
| } |
| |
| @Test |
| // See PIG-644 |
| public void testNegative3() throws RecognitionException, ParsingFailureException, IOException { |
| String query = "a = load '1.txt' as (a0:int, a0:int);" + |
| "store a into 'output';"; |
| try { |
| validate( query ); |
| } catch(RecognitionException ex) { |
| Assert.assertTrue( ex.toString().contains( "Duplicated alias in schema" ) ); |
| return; |
| } |
| Assert.fail( "Query should fail to validate." ); |
| } |
| |
| private LogicalPlan validate(String query) throws RecognitionException, ParsingFailureException, IOException { |
| LogicalPlan plan = ParserTestingUtils.generateLogicalPlan( query ); |
| SchemaAliasVisitor visitor = new SchemaAliasVisitor( plan ); |
| visitor.visit(); |
| return plan; |
| } |
| |
| } |