Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/18325#discussion_r122378674
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/ddl.scala ---
@@ -271,7 +271,7 @@ case class AlterTableUnsetPropertiesCommand(
}
}
// If comment is in the table property, we reset it to None
- val tableComment = if (propKeys.contains("comment")) None else
table.properties.get("comment")
+ val tableComment = if (propKeys.contains("comment")) None else
table.comment
--- End diff --
Oh. I see. It goes to override the original table metadata if no comment is
set.
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