SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function hasColumnInTable (children 1)
     ExpressionList (children 4)
      Literal \'localhost\'
      Function currentDatabase (children 1)
       ExpressionList
      Literal \'has_column_in_table\'
      Literal \'nest\'
