Github user cloud-fan commented on a diff in the pull request:

    https://github.com/apache/spark/pull/14625#discussion_r75588146
  
    --- Diff: 
sql/core/src/test/scala/org/apache/spark/sql/SQLQueryTestSuite.scala ---
    @@ -245,6 +245,10 @@ class SQLQueryTestSuite extends QueryTest with 
SharedSQLContext {
     
         (1 to 100).map(i => (i, i.toString)).toDF("key", 
"value").createOrReplaceTempView("testdata")
     
    +    Seq((1, 1), (1, 2), (2, 1), (2, 2), (3, 1), (3, 2))
    --- End diff --
    
    previously we have 3 pre-loaded tables: `testdata`, `arraydata`, `mapdata`, 
which are key-value table, array type table and map type table. For the new 
join tests, I think only `lowerCaseData`, `upperCaseData`, `srcpart` make 
sense, why can't we use `testdata` for `testData2`, `src` and `src2`? They are 
all key-value tables.


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