Github user gatorsmile commented on a diff in the pull request:

    https://github.com/apache/spark/pull/14132#discussion_r71736274
  
    --- Diff: 
sql/core/src/main/scala/org/apache/spark/sql/catalyst/SQLBuilder.scala ---
    @@ -162,6 +162,9 @@ class SQLBuilder(logicalPlan: LogicalPlan) extends 
Logging {
             toSQL(p.right),
             p.condition.map(" ON " + _.sql).getOrElse(""))
     
    +    case h @ Hint(_, _, s @ SubqueryAlias(alias, p @ Project(_, _: 
SQLTable))) =>
    --- End diff --
    
    The new way looks cleaner, but this looks like a special handling. Can you 
write a code comment to explain when it is being used?


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