GitHub user viirya opened a pull request:
https://github.com/apache/spark/pull/7182
[SPARK-8785][SQL] Improve Parquet schema merging
JIRA: https://issues.apache.org/jira/browse/SPARK-8785
Currently, the parquet schema merging (`ParquetRelation2.readSchema`) may
spend much time to merge duplicate schema. We can select only non duplicate
schema and merge them later.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/viirya/spark-1 improve_parquet_merging
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/7182.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 #7182
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commit a63c3ffe660bf57197bac319e2555e1a5108dab8
Author: Liang-Chi Hsieh <[email protected]>
Date: 2015-07-02T07:20:49Z
Improve Parquet schema merging.
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