Wang Yanlin created CALCITE-3921:
------------------------------------

             Summary: Support serialize TableModify to json string and 
deserialize from it
                 Key: CALCITE-3921
                 URL: https://issues.apache.org/jira/browse/CALCITE-3921
             Project: Calcite
          Issue Type: Bug
            Reporter: Wang Yanlin


When trying to serialize TableModify to json string, got 

{noformat}
java.lang.UnsupportedOperationException: type not serializable: INSERT (type 
org.apache.calcite.rel.core.TableModify.Operation)

        at org.apache.calcite.rel.externalize.RelJson.toJson(RelJson.java:322)
        at 
org.apache.calcite.rel.externalize.RelJsonWriter.put(RelJsonWriter.java:84)
        at 
org.apache.calcite.rel.externalize.RelJsonWriter.explain_(RelJsonWriter.java:67)
        at 
org.apache.calcite.rel.externalize.RelJsonWriter.done(RelJsonWriter.java:129)
        at 
org.apache.calcite.rel.AbstractRelNode.explain(AbstractRelNode.java:303)
        at org.apache.calcite.plan.RelOptUtil.dumpPlan(RelOptUtil.java:2110)
        at 
org.apache.calcite.plan.RelWriterTest.testTableModify(RelWriterTest.java:922)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:675)
        at 
org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
        at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:125)
        at 
org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:139)
        at 
org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:131)
        at 
org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:81)
        at 
org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
        at 
org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
        at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:104)
        at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:62)
        at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:43)
        at 
org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:35)
        at 
org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
        at 
org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
        at 
org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$6(TestMethodTestDescriptor.java:202)
        at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:198)
        at 
org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:135)
        at 
org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:69)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:135)
        at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
        at 
org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
        at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
        at java.util.ArrayList.forEach(ArrayList.java:1257)
        at 
org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
        at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
        at 
org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
        at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
        at java.util.ArrayList.forEach(ArrayList.java:1257)
        at 
org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:139)
        at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:125)
        at 
org.junit.platform.engine.support.hierarchical.Node.around(Node.java:135)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:123)
        at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:122)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:80)
        at 
org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
        at 
org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
        at 
org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
        at 
org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:248)
        at 
org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$5(DefaultLauncher.java:211)
        at 
org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:226)
        at 
org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:199)
        at 
org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:132)
        at 
com.intellij.junit5.JUnit5IdeaTestRunner.startRunnerWithArgs(JUnit5IdeaTestRunner.java:69)
        at 
com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
        at 
com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
        at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
{noformat}




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