Omar Ismail created SPARK-40974:
-----------------------------------
Summary: EXPODE function selects outer column
Key: SPARK-40974
URL: https://issues.apache.org/jira/browse/SPARK-40974
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 3.3.0
Reporter: Omar Ismail
Im trying to determine if indirectly selecting an outer column is a bug or an
intended feature of the EXPLODE function.
If I run the following SQL statement:
```
SELECT
(SELECT FIRST(name_element_)
FROM LATERAL VIEW EXPLODE(name) AS name_element_
*)*
FROM patient
```
it fails with:
```
Accessing outer query column is not allowed in:
Generate explode(outer(name#9628))
```
However, if I do a "cheeky select" (bolded below), the SQL query is valid and
runs:
```
SELECT(
SELECT FIRST(name_element_)
FROM (SELECT EXPLODE(name_element_) AS name_element_
\{*}FROM ({*}{*}SELECT{*} *name AS name_element_)*
** )
)
FROM patient
```
>From the viewpoint of the EXPLODE function, it seems like the column
>name_element_ does not come from an outer column. Is this an intended feature
>or a bug?
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