Hi, Followed the avro example at https://github.com/masayuki038/calcite-avro-sample,
we make a projectable version of our JsonAdapter at https://github.com/guxiaobo/calcite-json-adapter, but the simple test2 method at https://github.com/guxiaobo/calcite-json-adapter/blob/main/src/test/java/org/apache/calcite/adapter/json/test/DynamicDataTest.java failed with data type mismatch problem with message : Running org.apache.calcite.adapter.json.test.DynamicDataTest SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder". SLF4J: Defaulting to no-operation (NOP) logger implementation SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details. Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 2.286 sec <<< FAILURE! test2(org.apache.calcite.adapter.json.test.DynamicDataTest) Time elapsed: 2.222 sec <<< ERROR! java.lang.ClassCastException: class [Ljava.lang.Object; cannot be cast to class java.lang.Long ([Ljava.lang.Object; and java.lang.Long are in module java.base of loader 'bootstrap') at org.apache.calcite.avatica.util.AbstractCursor$LongAccessor.getLong(AbstractCursor.java:562) at org.apache.calcite.avatica.AvaticaResultSet.getLong(AvaticaResultSet.java:261) at org.apache.calcite.adapter.json.test.BaseTest.exeGetLong(BaseTest.java:40) at org.apache.calcite.adapter.json.test.DynamicDataTest.test2(DynamicDataTest.java:107) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306) at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63) at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329) at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293) at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306) at org.junit.runners.ParentRunner.run(ParentRunner.java:413) at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252) at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141) at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189) at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165) at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85) at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115) at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75) Results : Tests in error: test2(org.apache.calcite.adapter.json.test.DynamicDataTest): class [Ljava.lang.Object; cannot be cast to class java.lang.Long ([Ljava.lang.Object; and java.lang.Long are in module java.base of loader 'bootstrap') Tests run: 1, Failures: 0, Errors: 1, Skipped: 0 By the way, the v0.0.1 version of our adapter only implements a ScannableTable , and all the testes can run successfully.
