[jira] [Resolved] (SPARK-6674) Use different types to represent rows used inside and outside Catalyst

["Michael Armbrust (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-6674?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Armbrust resolved SPARK-6674.
-------------------------------------
    Resolution: Duplicate

> Use different types to represent rows used inside and outside Catalyst
> ----------------------------------------------------------------------
>
>                 Key: SPARK-6674
>                 URL: https://issues.apache.org/jira/browse/SPARK-6674
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 1.1.1, 1.2.1, 1.3.0
>            Reporter: Cheng Lian
>
> Within Catalyst, we use more efficient classes to represent objects in rows. For example, we use {{o.a.s.sql.types.Decimal}} instead of Java {{BigDecimal}}. When row objects are passed to / from user space, these object get converted by {{ScalaReflection.convertToScala}} / {{ScalaReflection.converToCatalyst}}.
> This approach is error prone because we may occasionally forget to add necessary conversions. It would be better to have a dedicated row type to represent row objects used within Catalyst, thus enforce this convention via type system.



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