[jira] [Assigned] (SPARK-16157) Add New Methods for Comments in StructField and StructType

["Apache Spark (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-16157?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-16157:
------------------------------------

    Assignee: Apache Spark

> Add New Methods for Comments in StructField and StructType
> ----------------------------------------------------------
>
>                 Key: SPARK-16157
>                 URL: https://issues.apache.org/jira/browse/SPARK-16157
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.0.0
>            Reporter: Xiao Li
>            Assignee: Apache Spark
>
> Currently, the column-related comment attribute is stored in {{Metadata}}. For example, 
> {noformat}
> StructType(
>       StructField("cl1", IntegerType, nullable = false,
>         new MetadataBuilder().putString("comment", "test").build()) :: Nil)
> {noformat}
> Compared with the existing SQL interface, it is not user friendly to add such a comment attribute when defining a {{StructField}}.  



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