Spark SQL like使用sqlContext select返回没有结果spark版本1.5.1 / 1.5.2

Question

它看起来不像带有hive支持的spark sql＆＃34; sql喜欢＆＃34;。这是我用于在spark-shell中进行测试的示例代码

case class Department(id: String, name: String)
val department1 = new Department("123456", "Computer Science")
val department2 = new Department("789012", "Mechanical Engineering")
val department3 = new Department("345678", "Theater and Drama")
val department4 = new Department("901234", "Indoor Recreation")
val dSeq = Seq(department1, department2, department3, department4)
val dfd = dSeq.toDF()
dfd.registerTempTable("departments")
val re=sqlContext.sql("select * from departments where name like '*Rec*'")
re.show()

没有结果。我检查sqlContext，它是hiveContext

阶＆GT; sqlContext
res15：org.apache.spark.sql.SQLContext =org.apache.spark.sql.hive.HiveContext@4f03729f

有人知道为什么吗？