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https://issues.apache.org/jira/browse/SPARK-33172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17231841#comment-17231841
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Apache Spark commented on SPARK-33172:
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User 'davidrabinowitz' has created a pull request for this issue:
https://github.com/apache/spark/pull/30372
> Spark SQL CodeGenerator does not check for UserDefined type
> -----------------------------------------------------------
>
> Key: SPARK-33172
> URL: https://issues.apache.org/jira/browse/SPARK-33172
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 2.4.7, 3.0.1
> Reporter: David Rabinowitz
> Priority: Minor
>
> The CodeGenerator takes the DataType given to {{getValueFromVector()}} as
> is, and generates code based on its type. The generated code is not aware of
> the actual type, and therefore cannot be compiled. For example, using a
> DataFrame with a Spark ML Vector (VectorUDT) the generated code is:
> {{InternalRow datasourcev2scan_value_2 = datasourcev2scan_isNull_2 ? null :
> (datasourcev2scan_mutableStateArray_2[2].getStruct(datasourcev2scan_rowIdx_0,
> 4));}}
> {{ Which leads to a runtime error of}}
> {{20/10/14 13:20:51 ERROR CodeGenerator: failed to compile:
> org.codehaus.commons.compiler.CompileException: File 'generated.java', Line
> 153, Column 126: No applicable constructor/method found for actual parameters
> "int, int"; candidates are: "public
> org.apache.spark.sql.vectorized.ColumnarRow
> org.apache.spark.sql.vectorized.ColumnVector.getStruct(int)"}}
> {{ org.codehaus.commons.compiler.CompileException: File 'generated.java',
> Line 153, Column 126: No applicable constructor/method found for actual
> parameters "int, int"; candidates are: "public
> org.apache.spark.sql.vectorized.ColumnarRow
> org.apache.spark.sql.vectorized.ColumnVector.getStruct(int)"}}
> {{ at org.codehaus.janino.UnitCompiler.compileError(UnitCompiler.java:12124)}}
> {{...}}
> {{ which then throws Spark to an infinite loop of this error.}}
> The solution is quite simple, {{getValueFromVector()}} should match nad
> handle UserDefinedType the same as {{CodeGenerator.javaType()}} is doing.
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