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

    https://github.com/apache/spark/pull/14962#discussion_r78687075
  
    --- Diff: sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala 
---
    @@ -2661,4 +2661,15 @@ class SQLQuerySuite extends QueryTest with 
SharedSQLContext {
             data.selectExpr("`part.col1`", "`col.1`"))
         }
       }
    +
    +  test("CREATE TABLE USING if a same-name temp view exists") {
    +    withTable("same_name") {
    +      withTempView("same_name") {
    +        spark.range(10).createTempView("same_name")
    +        sql("CREATE TABLE same_name(i int) USING json")
    +        checkAnswer(spark.table("same_name"), spark.range(10).toDF())
    +        assert(spark.table("default.same_name").collect().isEmpty)
    +      }
    +    }
    +  }
    --- End diff --
    
    Let's add comments to explain what this test is for in case we accidentally 
delete it in future.


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