[jira] [Created] (FLINK-29035) ExpressionReducer does not work with jar resources

["Timo Walther (Jira)" <ji...@apache.org>]

Timo Walther created FLINK-29035:
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             Summary: 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


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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