SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Function sum (children 1)
     ExpressionList (children 1)
      Identifier a
    Function sum (children 1)
     ExpressionList (children 1)
      Identifier b
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function cluster (children 1)
       ExpressionList (children 2)
        Identifier test_cluster_two_shards
        Function view (children 1)
         ExpressionList (children 1)
          SelectWithUnionQuery (children 1)
           ExpressionList (children 2)
            SelectQuery (children 2)
             ExpressionList (children 2)
              Function CAST (alias a) (children 1)
               ExpressionList (children 2)
                Identifier number
                Literal \'Decimal(7, 2)\'
              Literal UInt64_0 (alias b)
             TablesInSelectQuery (children 1)
              TablesInSelectQueryElement (children 1)
               TableExpression (children 1)
                Function numbers (children 1)
                 ExpressionList (children 1)
                  Literal UInt64_2
            SelectQuery (children 2)
             ExpressionList (children 2)
              Literal UInt64_0
              Function CAST (alias b) (children 1)
               ExpressionList (children 2)
                Identifier number
                Literal \'Decimal(7, 2)\'
             TablesInSelectQuery (children 1)
              TablesInSelectQueryElement (children 1)
               TableExpression (children 1)
                Function numbers (children 1)
                 ExpressionList (children 1)
                  Literal UInt64_2