SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Identifier b
    Identifier a
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function mysql (children 1)
       ExpressionList (children 6)
        Literal \'127.0.0.1:9004\'
        Function currentDatabase (children 1)
         ExpressionList
        Identifier foo
        Literal \'default\'
        Literal \'\'
        Set
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier a
