GitHub user dongjoon-hyun opened a pull request:
https://github.com/apache/spark/pull/15953
[SPARK-18517][SQL] DROP TABLE IF EXISTS should not warn for non-existing
tables
## What changes were proposed in this pull request?
Currently, `DROP TABLE IF EXISTS` shows warning for non-existing tables.
However, it had better be quiet for this case by definition of the command.
**BEFORE**
```scala
scala> sql("DROP TABLE IF EXISTS nonexist")
16/11/20 20:48:26 WARN DropTableCommand:
org.apache.spark.sql.catalyst.analysis.NoSuchTableException: Table or view
'nonexist' not found in database 'default';
```
**AFTER**
```scala
scala> sql("DROP TABLE IF EXISTS nonexist")
res0: org.apache.spark.sql.DataFrame = []
```
## How was this patch tested?
Manual because this is related to the warning messages instead of
exceptions.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dongjoon-hyun/spark SPARK-18517
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15953.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 #15953
----
commit 95a8a32ae6e3b4f547431bf604bfadf5223e7c79
Author: Dongjoon Hyun <[email protected]>
Date: 2016-11-21T04:52:41Z
[SPARK-18517][SQL] DROP TABLE IF EXISTS should not warn for non-existing
tables
----
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