Github user mgaido91 commented on a diff in the pull request:

    https://github.com/apache/spark/pull/21789#discussion_r203684095
  
    --- Diff: 
sql/hive-thriftserver/src/test/scala/org/apache/spark/sql/hive/thriftserver/HiveThriftServer2Suites.scala
 ---
    @@ -766,6 +774,14 @@ class HiveThriftHttpServerSuite extends 
HiveThriftJdbcTest {
           assert(resultSet.getString(2) === HiveUtils.builtinHiveVersion)
         }
       }
    +
    +  test("Checks cast as float") {
    --- End diff --
    
    I don't think so. If you add:
    ```
      test("Checks cast as float") {
        withJdbcStatement() { statement =>
          val resultSet = statement.executeQuery("SELECT CAST('4.56' AS FLOAT)")
          resultSet.next()
          assert(resultSet.getString(1) === "4.56")
        }
      }
    ```
    to the abstract class you need to change nothing else and the test would be 
executed both as a part of HiveThriftHttpServerSuite with one mode and as a 
part of HiveThriftBinaryServerSuite with the other mode.


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