[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

[liancheng]

Github user liancheng commented on the pull request:

https://github.com/apache/spark/pull/9225#issuecomment-153938948
  
Closing this since we decided not to bump parquet-mr to 1.8.1 for 1.6.


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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

[liancheng]

Github user liancheng closed the pull request at:

https://github.com/apache/spark/pull/9225


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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

[liancheng]

Github user liancheng commented on the pull request:

https://github.com/apache/spark/pull/9225#issuecomment-152100731
  
@davies The current master and branch-1.5 have already worked around this 
issue by disabling Parquet filter push-down for binary and string columns. So 
in either way, we face performance regression in one way or another.


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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

[davies]

Github user davies commented on the pull request:

https://github.com/apache/spark/pull/9225#issuecomment-151926580
  
@liancheng Do we have a workaround for PARQUET-251? If yes, we could skip 
1.8.1, since it's not in a good state, wait for 1.8.2 instead.


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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

[liancheng]

GitHub user liancheng opened a pull request:

https://github.com/apache/spark/pull/9225

[SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

This PR bumps parquet-mr to 1.8.1 to fix [PARQUET-251] [3].

One unexpected issue is that parquet-mr 1.8.1 doesn't allow instantiating 
empty Parquet schema ([PARQUET-278] [1]). This affects queries like `SELECT 
COUNT(1) FROM t`, since we have to leave at least one column in Parquet 
requested schema. This PR works around this issue by selecting the "narrowest" 
column when no columns is requested. This issue has already been fixed in 
parquet-mr 1.8.2-SNAPSHOT ([PARQUET-363][2]).

[1]: https://issues.apache.org/jira/browse/PARQUET-278
[2]: https://issues.apache.org/jira/browse/PARQUET-363
[3]: https://issues.apache.org/jira/browse/PARQUET-251

You can merge this pull request into a Git repository by running:

$ git pull https://github.com/liancheng/spark spark-9876.parquet-mr-1.8.1

Alternatively you can review and apply these changes as the patch at:

https://github.com/apache/spark/pull/9225.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 #9225


commit d00ff458c77bfe84272aee824b490ea78724ed35
Author: Cheng Lian 
Date:   2015-10-22T13:58:27Z

Bumps parquet-mr to 1.8.1




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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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[GitHub] spark pull request: [SPARK-9876] [SQL] Bumps parquet-mr to 1.8.1

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