SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function s3Cluster (children 1)
       ExpressionList (children 3)
        Literal \'test_cluster_one_shard_three_replicas_localhost\'
        Literal \'http://localhost:11111/test/{a,b}.tsv\'
        Function headers (children 1)
         ExpressionList (children 1)
          Function equals (children 1)
           ExpressionList (children 2)
            Identifier MyCustomHeader
            Literal \'SomeValue\'
   ExpressionList (children 3)
    OrderByElement (children 1)
     Identifier c1
    OrderByElement (children 1)
     Identifier c2
    OrderByElement (children 1)
     Identifier c3
