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https://issues.apache.org/jira/browse/ORC-178?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16023788#comment-16023788
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ASF GitHub Bot commented on ORC-178:
------------------------------------
GitHub user xndai opened a pull request:
https://github.com/apache/orc/pull/128
ORC-178 Implement Basic C++ Writer and Writer Option
1. Add basic Writer and WriterOption
2. Add StructColumnWriter and IntegerColumnWriter. With them, we will be
able to write a complete ORC file that contains only int columns. To
limit the scope of this change, we will add more column writers later.
3. Add a base class for column statistics impl classes. This
is to be used by the base class of ColumnWriter so we don't have to
duplicate a bunch of logics everywhere.
4. Right now the UTs are pretty primative. We will add more UTs
(especially for stats and index) as we are adding more column writers.
At this moment, it's really hard to extract more UTs from our code base
without intorducing additional column writers.
Change-Id: I694dda600136e5d285e70a8124aa1cc334f4ef14
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/xndai/orc dev_writer
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/orc/pull/128.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #128
----
commit 013d18dc459f75763fa1951717c9d3624ab38519
Author: Xiening.Dai <[email protected]>
Date: 2017-05-24T22:01:52Z
ORC-178 Implement Basic C++ Writer and Writer Option
1. Add basic Writer and WriterOption
2. Add StructColumnWriter and IntegerColumnWriter. With them, we will be
able to write a complete ORC file that contains only int columns. To
limit the scope of this change, we will add more column writers later.
3. Add a base class for column statistics impl classes. This
is to be used by the base class of ColumnWriter so we don't have to
duplicate a bunch of logics everywhere.
4. Right now the UTs are pretty primative. We will add more UTs
(especially for stats and index) as we are adding more column writers.
At this moment, it's really hard to extract more UTs from our code base
without intorducing additional column writers.
Change-Id: I694dda600136e5d285e70a8124aa1cc334f4ef14
----
> Implement Basic C++ Writer and Writer Option
> --------------------------------------------
>
> Key: ORC-178
> URL: https://issues.apache.org/jira/browse/ORC-178
> Project: ORC
> Issue Type: Sub-task
> Components: C++
> Reporter: Gang Wu
> Assignee: Xiening Dai
>
> 1. write orc file header, file footer, postscript, etc.
> 2. write columns of all types
> 3. write column statistics
> 4. write index stream in writer and reader seeks to row based on index
> information
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