dongjoon-hyun commented on pull request #31811:
URL: https://github.com/apache/spark/pull/31811#issuecomment-796861669
cc @viirya since this is a correctness issue which is a blocker for Apache
Spark 2.4.8.
```
scala> sql("create view c(x, y) as select 1 a, 2 a")
res1: org.apache.spark.sql.DataFrame = []
scala> sql("select * from c").show
+---+---+
| x| y|
+---+---+
| 1| 1|
+---+---+
scala> spark.version
res3: String = 2.4.7
```
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