[jira] [Resolved] (SPARK-14329) "fieldIndex on a Row without schema is undefined." when accessing fields of Row by name

["Sean Owen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-14329?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sean Owen resolved SPARK-14329.
-------------------------------
    Resolution: Not A Problem

Reopen if you think there's more to it

> "fieldIndex on a Row without schema is undefined." when accessing fields of Row by name
> ---------------------------------------------------------------------------------------
>
>                 Key: SPARK-14329
>                 URL: https://issues.apache.org/jira/browse/SPARK-14329
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.0.0
>         Environment: today's local build
>            Reporter: Jacek Laskowski
>            Priority: Minor
>
> It appears as if the exception message were not related to the issue that..._a field "hello" could not be found_.
> Moreover the scaladoc of {{Row.getAs(String)}} says:
> {quote}
>    * For primitive types if value is null it returns 'zero value' specific for primitive
>    * ie. 0 for Int - use isNullAt to ensure that value is not null
> {quote}
> which is not the case either.
> {code}
> scala> import org.apache.spark.sql.Row
> import org.apache.spark.sql.Row
> scala> val row = Row(1, "hello")
> row: org.apache.spark.sql.Row = [1,hello]
> scala> row.getAs[String]("hello")
> java.lang.UnsupportedOperationException: fieldIndex on a Row without schema is undefined.
>   at org.apache.spark.sql.Row$class.fieldIndex(Row.scala:344)
>   at org.apache.spark.sql.catalyst.expressions.GenericRow.fieldIndex(rows.scala:192)
>   at org.apache.spark.sql.Row$class.getAs(Row.scala:335)
>   at org.apache.spark.sql.catalyst.expressions.GenericRow.getAs(rows.scala:192)
>   ... 49 elided
> scala> row.getAs[String](null)
> java.lang.UnsupportedOperationException: fieldIndex on a Row without schema is undefined.
>   at org.apache.spark.sql.Row$class.fieldIndex(Row.scala:344)
>   at org.apache.spark.sql.catalyst.expressions.GenericRow.fieldIndex(rows.scala:192)
>   at org.apache.spark.sql.Row$class.getAs(Row.scala:335)
>   at org.apache.spark.sql.catalyst.expressions.GenericRow.getAs(rows.scala:192)
>   ... 49 elided
> {code}



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