Fixes #36 (#39)

src/tmducken/duckdb.clj

@@ -329,9 +329,14 @@ tmducken.duckdb> (get-config-options)
   dataset must match *precisely* the schema of the target table."
   ([conn dataset options]
    (resource/stack-resource-context
-    (let [table-name (sql/table-name dataset options)
+    (let [table-name (str (sql/table-name dataset options))
           app-ptr-ptr (dt-ffi/make-ptr :pointer 0)
-          app-status (duckdb-ffi/duckdb_appender_create conn "" table-name app-ptr-ptr)
+          dotindex (.indexOf table-name (int \.))
+          [schema table] (if (== -1 dotindex)
+                           ["" table-name]
+                           [(.substring table-name 0 dotindex)
+                            (.substring table-name (inc dotindex))])
+          app-status (duckdb-ffi/duckdb_appender_create conn schema table app-ptr-ptr)
           appender (Pointer. (app-ptr-ptr 0))
           ;;this is fine because we are hardcoding to track via stack.
           ;;Normally dispose-fn cannot reference things being tracked

test/tmducken/duckdb_test.clj

@@ -251,3 +251,12 @@
                      "local_dates"
                      "local_times"}
                    (set (first (alltables "column_names")))))])))
+
+
+(deftest schema-support
+  (let [ds (-> (ds/->dataset [{:a 1}])
+               (ds/set-dataset-name :foo.table))]
+    (duckdb/run-query! @conn* "CREATE SCHEMA foo")
+    (duckdb/create-table! @conn* ds)
+    (duckdb/insert-dataset! @conn* ds)
+    (is (= [1] ((duckdb/sql->dataset @conn* "select * from foo.table") "a")))))