SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Identifier c
    Function count (children 1)
     ExpressionList (children 1)
      Identifier c
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 2)
           Identifier dummy
           Function count (alias c) (children 1)
            ExpressionList
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Function clusterAllReplicas (children 1)
              ExpressionList (children 2)
               Identifier test_cluster_two_shards
               Identifier system.one
