SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    WithElement (children 1)
     Subquery (children 1)
      SelectWithUnionQuery (children 1)
       ExpressionList (children 1)
        SelectQuery (children 3)
         ExpressionList (children 2)
          Identifier n
          Literal NULL (alias b)
         TablesInSelectQuery (children 1)
          TablesInSelectQueryElement (children 1)
           TableExpression (children 1)
            TableIdentifier with_test
         Function and (children 1)
          ExpressionList (children 2)
           Function isNull (children 1)
            ExpressionList (children 1)
             Identifier b
           Function equals (children 1)
            ExpressionList (children 2)
             Identifier n
             Literal UInt64_42
   ExpressionList (children 1)
    Function max (children 1)
     ExpressionList (children 1)
      Identifier n
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test1
   Function equals (children 1)
    ExpressionList (children 2)
     Identifier n
     Literal UInt64_45
