SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function or (children 1)
     ExpressionList (children 2)
      Function equals (children 1)
       ExpressionList (children 2)
        Identifier k
        Literal UInt64_3
      Function or (children 1)
       ExpressionList (children 3)
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier k
          Literal UInt64_1
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier k
          Literal UInt64_2
        Function equals (children 1)
         ExpressionList (children 2)
          Function or (children 1)
           ExpressionList (children 2)
            Literal NULL
            Literal UInt64_1
          Identifier k
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 1)
          ExpressionList (children 1)
           Function materialize (alias k) (children 1)
            ExpressionList (children 1)
             Literal UInt64_1
