@Override
  public int getType(ASTNode root) {
    return root.getChild(1).getType();
  }
Alter View category helper. It derives the actual type of the command from the root element, by selecting the type
of the second child, as the Alter View commands have this structure: viewName command partitionSpec?
ql/src/java/org/apache/hadoop/hive/ql/ddl/view/AlterViewAnalyzerCategory.java