title: error: not found: value StructType/StructField/StringType
body: <p>I am running scala on my local machine, version 2.0.</p>
  
  <pre><code>val schema = StructType(schemaString.split("|^").map(fieldName =&gt;StructField(fieldName, StringType, true)))
  &lt;console&gt;:45: error: not found: value StructType
     val schema = StructType(schemaString.split("|^").map(fieldName =&gt;StructField(fieldName, StringType, true)))
                  ^
  &lt;console&gt;:45: error: not found: value StructField
     val schema = StructType(schemaString.split("|^").map(fieldName =&gt; StructField(fieldName, StringType, true)))
                                                                       ^
  &lt;console&gt;:45: error: not found: value StringType
     val schema = StructType(schemaString.split("|^").map(fieldName =&gt; StructField(fieldName, StringType, true)))
                                                                                              ^
  </code></pre>
  
  <p>i loaded import org.apache.spark.sql._ but still getting this error. am i missing any packages?</p>