SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function concatWithSeparator (children 1)
     ExpressionList (children 3)
      Identifier c0
      Identifier c1
      Identifier c2
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 3)
           Literal \'a\' (alias c0)
           Function toString (alias c1) (children 1)
            ExpressionList (children 1)
             Identifier number
           Function plus (alias c2) (children 1)
            ExpressionList (children 2)
             Identifier number
             Literal UInt64_9
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Function numbers (children 1)
              ExpressionList (children 1)
               Literal UInt64_5
