Github user dilipbiswal commented on the pull request:
https://github.com/apache/spark/pull/11596#issuecomment-194167614
@cloud-fan Thanks !! Actually i remember exploring this option. There is a
generate syntax for outer lateral view like following -
```SQL
SELECT * FROM src LATERAL VIEW OUTER explode(array()) C AS a limit 10;
```
I thought if we converted this generate operator as a sub select where the
generator is in projection
list , we will loose the outer semantics. Thats why i felt safer to
generate as a LATERAL VIEW
clause.
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