SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function COUNT (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function s3Cluster (children 1)
       ExpressionList (children 2)
        Literal \'test_cluster_two_shards_localhost\'
        Literal \'http://localhost:11111/test/{a,b,c}.tsv\'