GitHub user zsxwing opened a pull request:
https://github.com/apache/spark/pull/13013
[SPARK-15231][SQL]Document the semantic of saveAsTable and insertInto and
don't drop columns silently
## What changes were proposed in this pull request?
This PR adds documents about the different behaviors between `insertInto`
and `saveAsTable`, and throws an exception when the user try to add too man
columns using `saveAsTable with append`.
## How was this patch tested?
Unit tests added in this PR.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zsxwing/spark SPARK-15231
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13013.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 #13013
----
commit eb4f3608daa7414cc8d1d25064795c801e47d215
Author: Shixiong Zhu <[email protected]>
Date: 2016-05-09T20:40:28Z
Document the semantic of saveAsTable and insertInto and don't drop columns
silently
This PR adds documents about the different behaviors between `insertInto`
and `saveAsTable`, and throws an exception when the user try to add too man
columns using `saveAsTable with append`.
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