GitHub user wangyum opened a pull request:
https://github.com/apache/spark/pull/22263
[SPARK-25269][SQL] SQL interface support specify StorageLevel when cache
table
## What changes were proposed in this pull request?
SQL interface support specify `StorageLevel` when cache table. The semantic
is like this:
```sql
CACHE DISK_ONLY TABLE tableName;
```
All supported `StorageLevel` is:
https://github.com/apache/spark/blob/eefdf9f9dd8afde49ad7d4e230e2735eb817ab0a/core/src/main/scala/org/apache/spark/storage/StorageLevel.scala#L172-L183
## How was this patch tested?
unit tests and manual tests
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/wangyum/spark SPARK-25269
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/22263.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 #22263
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commit 9e058d1b402dec85982a880bf086268a1dcec99e
Author: Yuming Wang <yumwang@...>
Date: 2018-08-29T06:31:44Z
SQL interface support specify StorageLevel when cache table
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