SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function clusterAllReplicas (children 1)
       ExpressionList (children 2)
        Literal \'test_shard_localhost\'
        Identifier system.one
   Set
