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https://issues.apache.org/jira/browse/HIVE-352?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12689221#action_12689221
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Zheng Shao commented on HIVE-352:
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@Yongqiang: The reason that we do that "lazy" operation is that there will be
"CASE", "IF" and short-circuiting boolean operations which will allow us to
skip different columns for different rows.
We need a new top-level StructObjectInspector which can deserialize the column
only when getField/getStructFieldData is called on that column. For all levels
below that, we can reuse the current ObjectInspector.
> Make Hive support column based storage
> --------------------------------------
>
> Key: HIVE-352
> URL: https://issues.apache.org/jira/browse/HIVE-352
> Project: Hadoop Hive
> Issue Type: New Feature
> Reporter: He Yongqiang
>
> column based storage has been proven a better storage layout for OLAP.
> Hive does a great job on raw row oriented storage. In this issue, we will
> enhance hive to support column based storage.
> Acctually we have done some work on column based storage on top of hdfs, i
> think it will need some review and refactoring to port it to Hive.
> Any thoughts?
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