tsianglei created FLINK-26694:
---------------------------------
Summary: LookupFunction doesn't support multilevel inheritance
Key: FLINK-26694
URL: https://issues.apache.org/jira/browse/FLINK-26694
Project: Flink
Issue Type: Bug
Components: Table SQL / API
Affects Versions: 1.14.4
Reporter: tsianglei
Attachments: image-2022-03-17-11-19-21-269.png
When we implement lookup function with multilevel inheritance，then there has an
error。
{code:java}
org.apache.flink.table.api.ValidationException: Could not determine a type
inference for lookup function 'default_catalog.default_database.dimTable'.
Lookup functions support regular type inference. However, for convenience, the
output class can simply be a Row or RowData class in which case the input and
output types are derived from the table's schema with default conversion. at
org.apache.flink.table.planner.codegen.LookupJoinCodeGenerator$.createLookupTypeInference(LookupJoinCodeGenerator.scala:270)
at
org.apache.flink.table.planner.codegen.LookupJoinCodeGenerator$.generateLookupFunction(LookupJoinCodeGenerator.scala:166)
at
org.apache.flink.table.planner.codegen.LookupJoinCodeGenerator$.generateAsyncLookupFunction(LookupJoinCodeGenerator.scala:118)
at
org.apache.flink.table.planner.codegen.LookupJoinCodeGenerator.generateAsyncLookupFunction(LookupJoinCodeGenerator.scala)
at
org.apache.flink.table.planner.plan.nodes.exec.common.CommonExecLookupJoin.createAsyncLookupJoin(CommonExecLookupJoin.java:332)
at
org.apache.flink.table.planner.plan.nodes.exec.common.CommonExecLookupJoin.translateToPlanInternal(CommonExecLookupJoin.java:238)
at
org.apache.flink.table.planner.plan.nodes.exec.ExecNodeBase.translateToPlan(ExecNodeBase.java:134)
at
org.apache.flink.table.planner.plan.nodes.exec.ExecEdge.translateToPlan(ExecEdge.java:250)
at
org.apache.flink.table.planner.plan.nodes.exec.common.CommonExecCalc.translateToPlanInternal(CommonExecCalc.java:88)
at
org.apache.flink.table.planner.plan.nodes.exec.ExecNodeBase.translateToPlan(ExecNodeBase.java:134)
at
org.apache.flink.table.planner.plan.nodes.exec.ExecEdge.translateToPlan(ExecEdge.java:250)
at
org.apache.flink.table.planner.plan.nodes.exec.stream.StreamExecSink.translateToPlanInternal(StreamExecSink.java:114)
at
org.apache.flink.table.planner.plan.nodes.exec.ExecNodeBase.translateToPlan(ExecNodeBase.java:134)
at
org.apache.flink.table.planner.delegation.StreamPlanner$$anonfun$1.apply(StreamPlanner.scala:71)
at
org.apache.flink.table.planner.delegation.StreamPlanner$$anonfun$1.apply(StreamPlanner.scala:70)
at
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at
scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.Iterator$class.foreach(Iterator.scala:891)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1334)
at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
at scala.collection.AbstractTraversable.map(Traversable.scala:104)
at
org.apache.flink.table.planner.delegation.StreamPlanner.translateToPlan(StreamPlanner.scala:70)
at
org.apache.flink.table.planner.delegation.StreamPlanner.explain(StreamPlanner.scala:107)
at
org.apache.flink.table.planner.delegation.StreamPlanner.explain(StreamPlanner.scala:47)
at
org.apache.flink.table.api.internal.TableEnvironmentImpl.explainInternal(TableEnvironmentImpl.java:705)
at
org.apache.flink.table.api.internal.StatementSetImpl.explain(StatementSetImpl.java:118)
XXXXXXX
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.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at
com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
at
com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
at
com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:235)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:54)
Caused by: org.apache.flink.table.api.ValidationException: Could not extract a
valid type inference for function class 'XXXXXDynamicAsyncLookupFunctionEx'.
Please check for implementation mistakes and/or provide a corresponding hint.
at
org.apache.flink.table.types.extraction.ExtractionUtils.extractionError(ExtractionUtils.java:362)
at
org.apache.flink.table.types.extraction.TypeInferenceExtractor.extractTypeInference(TypeInferenceExtractor.java:150)
at
org.apache.flink.table.types.extraction.TypeInferenceExtractor.forAsyncTableFunction(TypeInferenceExtractor.java:143)
at
org.apache.flink.table.functions.AsyncTableFunction.getTypeInference(AsyncTableFunction.java:116)
at
org.apache.flink.table.planner.codegen.LookupJoinCodeGenerator$.createLookupTypeInference(LookupJoinCodeGenerator.scala:251)
... 52 more
Caused by: org.apache.flink.table.api.ValidationException: Error in extracting
a signature to output mapping.
at
org.apache.flink.table.types.extraction.ExtractionUtils.extractionError(ExtractionUtils.java:362)
at
org.apache.flink.table.types.extraction.FunctionMappingExtractor.extractOutputMapping(FunctionMappingExtractor.java:117)
at
org.apache.flink.table.types.extraction.TypeInferenceExtractor.extractTypeInferenceOrError(TypeInferenceExtractor.java:161)
at
org.apache.flink.table.types.extraction.TypeInferenceExtractor.extractTypeInference(TypeInferenceExtractor.java:148)
... 55 more
Caused by: org.apache.flink.table.api.ValidationException: Unable to extract a
type inference from method:
public void
XXXXXXXXXDynamicAsyncLookupFunction.eval(java.util.concurrent.CompletableFuture,java.lang.Object)
at
org.apache.flink.table.types.extraction.ExtractionUtils.extractionError(ExtractionUtils.java:362)
at
org.apache.flink.table.types.extraction.FunctionMappingExtractor.extractResultMappings(FunctionMappingExtractor.java:183)
at
org.apache.flink.table.types.extraction.FunctionMappingExtractor.extractOutputMapping(FunctionMappingExtractor.java:114)
... 57 more
Caused by: org.apache.flink.table.api.ValidationException: Could not extract a
data type from 'interface org.apache.flink.table.data.RowData' in generic class
'org.apache.flink.table.functions.AsyncTableFunction' in class
XXXXDynamicAsyncLookupFunctionEx. Please pass the required data type manually
or allow RAW types.
at
org.apache.flink.table.types.extraction.ExtractionUtils.extractionError(ExtractionUtils.java:362)
at
org.apache.flink.table.types.extraction.DataTypeExtractor.extractDataTypeOrRawWithTemplate(DataTypeExtractor.java:241)
at
org.apache.flink.table.types.extraction.DataTypeExtractor.extractDataTypeOrRaw(DataTypeExtractor.java:219)
at
org.apache.flink.table.types.extraction.DataTypeExtractor.extractDataTypeWithClassContext(DataTypeExtractor.java:195)
at
org.apache.flink.table.types.extraction.DataTypeExtractor.extractFromGeneric(DataTypeExtractor.java:125)
at
org.apache.flink.table.types.extraction.FunctionMappingExtractor.lambda$createGenericResultExtraction$13(FunctionMappingExtractor.java:478)
at
org.apache.flink.table.types.extraction.FunctionMappingExtractor.putExtractedResultMappings(FunctionMappingExtractor.java:319)
at
org.apache.flink.table.types.extraction.FunctionMappingExtractor.collectMethodMappings(FunctionMappingExtractor.java:269)
at
org.apache.flink.table.types.extraction.FunctionMappingExtractor.extractResultMappings(FunctionMappingExtractor.java:169)
... 58 more
Caused by: org.apache.flink.table.api.ValidationException: Cannot extract a
data type from an internal 'org.apache.flink.table.data.RowData' class without
further information. Please use annotations to define the full logical type.
at
org.apache.flink.table.types.extraction.ExtractionUtils.extractionError(ExtractionUtils.java:362)
at
org.apache.flink.table.types.extraction.ExtractionUtils.extractionError(ExtractionUtils.java:357)
at
org.apache.flink.table.types.extraction.DataTypeExtractor.checkForCommonErrors(DataTypeExtractor.java:368)
at
org.apache.flink.table.types.extraction.DataTypeExtractor.extractDataTypeOrError(DataTypeExtractor.java:273)
at
org.apache.flink.table.types.extraction.DataTypeExtractor.extractDataTypeOrRawWithTemplate(DataTypeExtractor.java:233)
... 65 more
{code}
We should change
org.apache.flink.table.types.extraction.ExtractionUtils#extractSimpleGeneric
clazz.getSuperclass() != baseClass --> !baseClass.isAssignableFrom(clazz)
Our code run like this:
!image-2022-03-17-11-17-17-292.png!
thus, clazz.getSuperclass().getSuperclass() == baseClass .
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