add import

Author: lianhuiwang

sql/core/src/main/scala/org/apache/spark/sql/execution/SparkSqlParser.scala

@@ -34,7 +34,7 @@ import org.apache.spark.sql.catalyst.plans.logical._
 import org.apache.spark.sql.execution.command._
 import org.apache.spark.sql.execution.datasources.{CreateTable, _}
 import org.apache.spark.sql.internal.{HiveSerDe, SQLConf, VariableSubstitution}
-import org.apache.spark.sql.types.StructType
+import org.apache.spark.sql.types.{StructField, StructType}
 
 /**
  * Concrete parser for Spark SQL statements.