SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayRemove (children 1)
     ExpressionList (children 2)
      Function array (children 1)
       ExpressionList (children 3)
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'1\'
          Literal \'Variant(UInt8, String)\'
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal \'x\'
          Literal \'Variant(UInt8, String)\'
        Function CAST (children 1)
         ExpressionList (children 2)
          Literal NULL
          Literal \'Variant(UInt8, String)\'
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'x\'
        Literal \'Variant(UInt8, String)\'
