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author | gatorsmile <gatorsmile@gmail.com> | 2016-11-14 21:21:34 -0800 |
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committer | Reynold Xin <rxin@databricks.com> | 2016-11-14 21:21:34 -0800 |
commit | 86430cc4e8dbc65a091a532fc9c5ec12b7be04f4 (patch) | |
tree | 9aa10cb31df939f003d9143b097de3bfe8ebff9b /sbin/stop-slave.sh | |
parent | c31def1ddcbed340bfc071d54fb3dc7945cb525a (diff) | |
download | spark-86430cc4e8dbc65a091a532fc9c5ec12b7be04f4.tar.gz spark-86430cc4e8dbc65a091a532fc9c5ec12b7be04f4.tar.bz2 spark-86430cc4e8dbc65a091a532fc9c5ec12b7be04f4.zip |
[SPARK-18430][SQL] Fixed Exception Messages when Hitting an Invocation Exception of Function Lookup
### What changes were proposed in this pull request?
When the exception is an invocation exception during function lookup, we return a useless/confusing error message:
For example,
```Scala
df.selectExpr("concat_ws()")
```
Below is the error message we got:
```
null; line 1 pos 0
org.apache.spark.sql.AnalysisException: null; line 1 pos 0
```
To get the meaningful error message, we need to get the cause. The fix is exactly the same as what we did in https://github.com/apache/spark/pull/12136. After the fix, the message we got is the exception issued in the constuctor of function implementation:
```
requirement failed: concat_ws requires at least one argument.; line 1 pos 0
org.apache.spark.sql.AnalysisException: requirement failed: concat_ws requires at least one argument.; line 1 pos 0
```
### How was this patch tested?
Added test cases.
Author: gatorsmile <gatorsmile@gmail.com>
Closes #15878 from gatorsmile/functionNotFound.
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