[SPARK-20017] Functions "str_to_map" and "explode" throws NPE exceptioin

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.1.0
• Fix Version/s: 2.1.1, 2.2.0
• Component/s: SQL
• Target Version/s: 2.1.1, 2.2.0
• Assignee: roncenzhao
• Reporter: roncenzhao
• Created: 19/Mar/17 13:38
• Updated: 21/Mar/17 18:34
• Resolved: 21/Mar/17 18:34

Description

```
val sqlDf = spark.sql("select k,v from (select str_to_map('') as map_col from range(2)) tbl lateral view explode(map_col) as k,v")

sqlDf.show
```

The sql throws NPE exception.

Issue Links

• links to: [Github] Pull Request #17350 (zhaorongsheng)