Allow additional connection string options for Oracle [Experimental]

src/metabase/driver/generic_sql.clj

@@ -185,12 +185,16 @@
 (defn handle-additional-options
   "If DETAILS contains an `:addtional-options` key, append those options to the connection string in CONNECTION-SPEC.
    (Some drivers like MySQL provide this details field to allow special behavior where needed)."
-  {:arglists '([connection-spec details])}
-  [{connection-string :subname, :as connection-spec} {additional-options :additional-options, :as details}]
-  (-> (dissoc connection-spec :additional-options)
-      (assoc :subname (str connection-string (when (seq additional-options)
-                                               (str (if (str/includes? connection-string "?") "&" "?")
-                                                    additional-options))))))
+  {:arglists '([connection-spec] [connection-spec details])}
+  ;; single arity provided for cases when `connection-spec` is built by applying simple transformations to `details`
+  ([connection-spec]
+   (handle-additional-options connection-spec connection-spec))
+  ;; two-arity version provided for when `connection-spec` is being built up separately from `details` source
+  ([{connection-string :subname, :as connection-spec} {additional-options :additional-options, :as details}]
+   (-> (dissoc connection-spec :additional-options)
+       (assoc :subname (str connection-string (when (seq additional-options)
+                                                (str (if (str/includes? connection-string "?") "&" "?")
+                                                     additional-options)))))))
 
 
 (defn escape-field-name

src/metabase/driver/oracle.clj

@@ -42,13 +42,15 @@
 
 (defn- connection-details->spec
   "Create a database specification for an Oracle database. DETAILS should include keys
-  for `:user`, `:password`, and `:sid`. You can also optionally set `:host` and `:port`."
+  for `:user`, `:password`, and `:sid`. You can also optionally set `:host` and `:port`, and
+  supply `:addtional-options` that are appended to the end of the JDBC connection string."
   [{:keys [host port sid]
     :or   {host "localhost", port 1521}
     :as   details}]
-  (merge {:subprotocol "oracle:thin"
-          :subname     (str "@" host ":" port ":" sid)}
-         (dissoc details :host :port)))
+  (-> (merge {:subprotocol "oracle:thin"
+              :subname     (str "@" host ":" port ":" sid)}
+             (dissoc details :host :port))
+      sql/handle-additional-options))
 
 (defn- can-connect? [details]
   (let [connection (connection-details->spec details)]
@@ -213,7 +215,10 @@
                                          {:name         "password"
                                           :display-name "Database password"
                                           :type         :password
-                                          :placeholder  "*******"}]))
+                                          :placeholder  "*******"}
+                                         {:name         "additional-options"
+                                          :display-name "Additional JDBC connection string options"
+                                          :placeholder  "serviceName=myservicename"}]))
           :execute-query  (comp remove-rownum-column sqlqp/execute-query)})
 
   sql/ISQLDriver

test/metabase/driver/oracle_test.clj

@@ -0,0 +1,17 @@
+(ns metabase.driver.oracle-test
+  "Tests for specific behavior of the Oracle driver."
+  (:require [expectations :refer :all]
+            [metabase.driver
+             [generic-sql :as sql]
+             oracle])
+  (:import metabase.driver.oracle.OracleDriver))
+
+;; make sure we can set additional connection string options
+(expect
+  {:subprotocol "oracle:thin"
+   :subname     "@localhost:1521:ORCL?serviceName=myservicename"
+   :sid         "ORCL"}
+  (sql/connection-details->spec (OracleDriver.) {:host               "localhost"
+                                                 :port               1521
+                                                 :sid                "ORCL"
+                                                 :additional-options "serviceName=myservicename"}))

test/metabase/driver/postgres_test.clj

@@ -7,7 +7,9 @@
              [query-processor-test :refer [rows]]
              [sync-database :as sync-db]
              [util :as u]]
-            [metabase.driver.generic-sql :as sql]
+            [metabase.driver
+             [generic-sql :as sql]
+             postgres]
             [metabase.models
              [database :refer [Database]]
              [field :refer [Field]]