Github user nsyca commented on a diff in the pull request:
https://github.com/apache/spark/pull/16168#discussion_r91106867
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/interface.scala
---
@@ -151,6 +151,7 @@ case class CatalogTable(
tableType: CatalogTableType,
storage: CatalogStorageFormat,
schema: StructType,
+ originalSchema: Option[StructType] = None,
--- End diff --
I guess this is to pass 1) the persistent schema of the view at the last
call to `(Simple)Analyzer`, and 2) the schema of the view from calling
`Analyzer` on the definition of the view definition captured in SQL string
input from the user. If this is correct, we need better variable names (and a
few comments will greatly help.)
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