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Dongjoon Hyun ddd02f50bb [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.

Author: Dongjoon Hyun <dongjoon@apache.org>

Closes #15953 from dongjoon-hyun/SPARK-18517.
2016-11-21 16:14:59 -05:00
..
benchmarks [SPARK-17335][SQL] Fix ArrayType and MapType CatalogString. 2016-09-03 19:02:20 +02:00
src [SPARK-18517][SQL] DROP TABLE IF EXISTS should not warn for non-existing tables 2016-11-21 16:14:59 -05:00
pom.xml [SPARK-17346][SQL][TEST-MAVEN] Generate the sql test jar to fix the maven build 2016-10-05 18:11:31 -07:00