GitHub user ericl opened a pull request:
https://github.com/apache/spark/pull/16090
[SPARK-18661] [SQL] Creating a partitioned datasource table should not scan
all files for table
## What changes were proposed in this pull request?
Even though in 2.1 creating a partitioned datasource table will not
populate the partition data by default (until the user issues MSCK REPAIR
TABLE), it seems we still scan the filesystem for no good reason.
We should avoid doing this when the user specifies a schema.
## How was this patch tested?
Perf stat tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ericl/spark spark-18661
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/16090.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 #16090
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commit 51d2a4141a3e808616d291ed089b0b1d8172b80a
Author: Eric Liang <[email protected]>
Date: 2016-11-30T23:43:59Z
Wed Nov 30 15:43:59 PST 2016
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