Apache Spark reassigned SPARK-17915:

    Assignee: Apache Spark

> Prepare ColumnVector implementation for UnsafeData
> --------------------------------------------------
>                 Key: SPARK-17915
>                 URL: https://issues.apache.org/jira/browse/SPARK-17915
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.0.0, 2.0.1
>            Reporter: Kazuaki Ishizaki
>            Assignee: Apache Spark
> Current implementations of {{ColumnarVector}} are {{OnHeapColumnarVector}} 
> and {{OffHeapColumnarVector}}, which are optimized for reading data from 
> Parquet. If they get an array, an map, or an struct from a {{Unsafe}} related 
> data structure, it is inefficient.
> This JIRA prepares a new implementation {{OnHeapUnsafeColumnarVector}} that 
> is optimized for reading data from a {{Unsafe}} related data structure.

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