SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function caseWithExpression (children 1)
     ExpressionList (children 5)
      Literal \'C\'
      Literal \'A\'
      Literal Bool_1
      Literal \'B\'
      Literal Bool_0
