Clojure jdbc - lazy resultset

--
% lein --version
Leiningen 2.3.4 on Java 1.7.0_45 OpenJDK Client VM

--
% cat project.clj
(defproject testdb "0.1.0-SNAPSHOT"
  :dependencies [[org.clojure/clojure "1.5.1"]
                 [org.clojure/java.jdbc "0.3.3"]
                 [com.microsoft.sqlserver/sqljdbc4 "4.0"]
                 [net.sourceforge.jtds/jtds "1.2.4"]
                 [local/ojdbc6 "11.2.0.3"]])

--
% cat src/testdb/core.clj
(ns testdb.core
  (:require [clojure.java.jdbc :as jdbc]))

#_(def db-spec
    {:classname "net.sourceforge.jtds.jdbc.Driver"
     :subprotocol "jtds:sqlserver"
     :subname "//xxx.xxx.xxx.xxx:1433;database=xxx;user=xxx;password=xxx"})

#_(def db-spec
    {:classname "com.microsoft.jdbc.sqlserver.SQLServerDriver"
     :subprotocol "sqlserver"
     :subname "//xxx.xxx.xxx.xxx:1433;database=xxx;user=xxx;password=xxx"})

(def db-spec
  {:classname "oracle.jdbc.OracleDriver"
   :subprotocol "oracle"
   :subname "thin:@//xxx.xxx.xxx.xxx:1521/xxx"
   :user "xxx"
   :password "xxx"})

(take 10 (jdbc/query oracle
            [{:fetch-size 100
              :concurrency :read-only
              :result-type :forward-only}
             "select * from very_large_table"]))