SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function caseWithExpr (children 1)
     ExpressionList (children 2)
      Function arrayReduce (children 1)
       ExpressionList (children 2)
        Literal NULL
        Function array (children 1)
         ExpressionList
      Function array (children 1)
       ExpressionList
