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https://issues.apache.org/jira/browse/FLINK-29035?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Timo Walther updated FLINK-29035:
---------------------------------
Fix Version/s: 1.16.0
> ExpressionReducer does not work with jar resources
> --------------------------------------------------
>
> Key: FLINK-29035
> URL: https://issues.apache.org/jira/browse/FLINK-29035
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / Planner
> Reporter: Timo Walther
> Priority: Major
> Fix For: 1.16.0
>
>
> It seems the code generation for expression reduction uses an invalid class
> loader that does not contain the jar resource.
> Reproducible example:
> {code}
> CREATE TEMPORARY SYSTEM FUNCTION myLower AS '%s' USING JAR '%s'
> SELECT myLower('HELLO')
> {code}
>
> fails with
> {code}
> java.lang.RuntimeException: Could not instantiate generated class
> 'ExpressionReducer$4'
> at
> org.apache.flink.table.runtime.generated.GeneratedClass.newInstance(GeneratedClass.java:74)
> at
> org.apache.flink.table.planner.codegen.ExpressionReducer.reduce(ExpressionReducer.scala:97)
> at
> org.apache.calcite.rel.rules.ReduceExpressionsRule.reduceExpressionsInternal(ReduceExpressionsRule.java:759)
> at
> org.apache.calcite.rel.rules.ReduceExpressionsRule.reduceExpressions(ReduceExpressionsRule.java:699)
> at
> org.apache.calcite.rel.rules.ReduceExpressionsRule$ProjectReduceExpressionsRule.onMatch(ReduceExpressionsRule.java:306)
> Caused by: org.apache.flink.api.common.InvalidProgramException: Table program
> cannot be compiled. This is a bug. Please file an issue.
> Caused by: org.codehaus.commons.compiler.CompileException: Line 13, Column
> 37: Cannot determine simple type name "LowerUDF46"
> at org.codehaus.janino.UnitCompiler.compileError(UnitCompiler.java:12211)
> at
> org.codehaus.janino.UnitCompiler.getReferenceType(UnitCompiler.java:6833)
> {code}
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