Add take/drop, move jdbc stuff, document default of postgres

Add take and drop functionality to the queries, so now you can use the take and
drop functions in a similar way to how they work on seqs in clojure.

Move jdbc interface stuff into clojure-sql.jdbc, so if you're using jdbc you
can include it yourself. (If you're not using jdbc then it shouldn't bother
you).

Given the default compilation target is actually postgres, document that.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/clojure_sql/jdbc.clj b/src/clojure_sql/jdbc.clj
new file mode 100644
index 0000000..8611336
--- /dev/null
+++ b/src/clojure_sql/jdbc.clj
@@ -0,0 +1,12 @@
+(ns clojure-sql.jdbc
+  (:require [clojure.java.jdbc :as jdbc]
+            [clojure-sql.core :refer [set-query-executor!]]))
+
+(defn use-jdbc! [connection-string]
+  (set-query-executor! (fn [type query] 
+                         (jdbc/with-connection connection-string
+                           (case type
+                             :select (jdbc/with-query-results results query
+                                       (vec results))
+                             :insert (jdbc/do-prepared-return-keys (first query) (next query))
+                             (jdbc/do-prepared (first query) (next query)))))))