[jira] [Created] (SPARK-29594) Create a Dataset from a Sequence of Case class

["Pedro Correia Luis (Jira)" <ji...@apache.org>]

Pedro Correia Luis created SPARK-29594:
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             Summary: Create a Dataset from a Sequence of Case class
                 Key: SPARK-29594
                 URL: https://issues.apache.org/jira/browse/SPARK-29594
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.4.4
            Reporter: Pedro Correia Luis


The Dataset code generation logic fails to handle field-names in case classes (e.g. "1_something"). Scala has an escaping mechanism (using backquotes) that allows Java (and Scala) keywords to be used as names in programs, as in the example below:

 

case class Foo(`1_something`: String)

 

val test = Seq(Foo("HelloWorld!")).toDS()


But this case class trips up the Dataset code generator. The following error message is displayed when Datasets containing instances of such case classes are processed.



java.lang.RuntimeException: Error while encoding: java.util.concurrent.ExecutionException: org.codehaus.commons.compiler.CompileException: File 'generated.java', Line 316, Column 15: failed to compile: org.codehaus.commons.compiler.CompileException: File 'generated.java', Line 316, Column 15: Expression "funcResult_2 = value_19" is not a type[0m
[31mstaticinvoke(class org.apache.spark.unsafe.types.UTF8String, StringType, fromString, unwrapoption(ObjectType(class java.lang.String), assertnotnull(assertnotnull(input[0, Foo, true])).1_something), true, false) AS 1_something#40[0m


 

 



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