[jira] [Commented] (ORC-1017) Create a new tool that summarizes the size of a file by column

["Owen O'Malley (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ORC-1017?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17423128#comment-17423128 ] 

Owen O'Malley commented on ORC-1017:
------------------------------------

We could break down the index by column, but we'd need to read the stripe footers. Otherwise, we can get all of the information from the file footer.

> Create a new tool that summarizes the size of a file by column
> --------------------------------------------------------------
>
>                 Key: ORC-1017
>                 URL: https://issues.apache.org/jira/browse/ORC-1017
>             Project: ORC
>          Issue Type: Improvement
>            Reporter: Owen O'Malley
>            Assignee: Owen O'Malley
>            Priority: Major
>
> I want a tool that summarizes how the space inside an ORC file is used. In particular, for each column, the indexes, the file footer, and the stripe footers.
> The output on the orc_split_elim_new.orc is:
> {quote}Percent  Bytes/Row  Name
>   46.79  0.04       subtype
>   17.49  0.02       _file_footer
>   16.57  0.02       _index
>    7.01   0.01       decimal1
>    5.05   0.00       _stripe_footer
>    2.84   0.00       string1
>    2.59   0.00       ts
>    1.67   0.00       userid{quote}



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