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https://issues.apache.org/jira/browse/PIG-114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12573254#action_12573254
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Pi Song commented on PIG-114:
-----------------------------
Stefan,
Sorry I should have used bullets instead of numbers. What I really meant was
all have to go together. (2) and (3) will be easy to do but (1) will require a
lot more work. In order to do that I want to listen to other people a bit more.
> store one alias/logicalPlan twice leads to instantiation of StoreFunc as
> LoadFunc
> ---------------------------------------------------------------------------------
>
> Key: PIG-114
> URL: https://issues.apache.org/jira/browse/PIG-114
> Project: Pig
> Issue Type: Bug
> Components: impl
> Reporter: Johannes Zillmann
> Attachments: pigPatch-storeTwice-620665.patch
>
>
> Calling PigServer#store() twice for an alias results in following exception :
> {noformat}
> java.lang.RuntimeException: java.lang.ClassCastException:
> org.apache.pig.test.DummyStoreFunc cannot be cast to org.apache.pig.LoadFunc
> at
> org.apache.pig.backend.local.executionengine.POLoad.<init>(POLoad.java:59)
> at
> org.apache.pig.backend.local.executionengine.LocalExecutionEngine.doCompile(LocalExecutionEngine.java:167)
> at
> org.apache.pig.backend.local.executionengine.LocalExecutionEngine.doCompile(LocalExecutionEngine.java:184)
> at
> org.apache.pig.backend.local.executionengine.LocalExecutionEngine.doCompile(LocalExecutionEngine.java:184)
> at
> org.apache.pig.backend.local.executionengine.LocalExecutionEngine.compile(LocalExecutionEngine.java:111)
> at
> org.apache.pig.backend.local.executionengine.LocalExecutionEngine.compile(LocalExecutionEngine.java:90)
> at
> org.apache.pig.backend.local.executionengine.LocalExecutionEngine.compile(LocalExecutionEngine.java:1)
> at org.apache.pig.PigServer.store(PigServer.java:330)
> at org.apache.pig.PigServer.store(PigServer.java:317)
> at org.apache.pig.test.StoreTwiceTest.testIt(StoreTwiceTest.java:31)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:589)
> at junit.framework.TestCase.runTest(TestCase.java:164)
> at junit.framework.TestCase.runBare(TestCase.java:130)
> at junit.framework.TestResult$1.protect(TestResult.java:110)
> at junit.framework.TestResult.runProtected(TestResult.java:128)
> at junit.framework.TestResult.run(TestResult.java:113)
> at junit.framework.TestCase.run(TestCase.java:120)
> at junit.framework.TestSuite.runTest(TestSuite.java:228)
> at junit.framework.TestSuite.run(TestSuite.java:223)
> at
> org.junit.internal.runners.OldTestClassRunner.run(OldTestClassRunner.java:35)
> at
> org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:45)
> at
> org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
> at
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
> Caused by: java.lang.ClassCastException: org.apache.pig.test.DummyStoreFunc
> cannot be cast to org.apache.pig.LoadFunc
> at
> org.apache.pig.backend.local.executionengine.POLoad.<init>(POLoad.java:57)
> ... 28 more
> {noformat}
> I will attach a patch with a test scenario for this. Basically the code is as
> follow:
> {noformat}PigServer pig = new PigServer(ExecType.LOCAL);
> pig
> .registerQuery("A = LOAD
> 'test/org/apache/pig/test/StoreTwiceTest.java' USING "
> + DummyLoadFunc.class.getName() + "();");
> pig.registerQuery("B = FOREACH A GENERATE * ;");
> File outputFile = new File("/tmp/testPigOutput");
> outputFile.delete();
> pig.store("A", outputFile.getAbsolutePath(), DummyStoreFunc.class
> .getName()
> + "()");
> outputFile.delete();
> pig.store("B", outputFile.getAbsolutePath(), DummyStoreFunc.class
> .getName()
> + "()");
> outputFile.delete();
> assertEquals(2, _storedTuples.size());
> {noformat}
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