Added DELETE clause that takes a FROM clause

Makes T-SQL join deletes possible

src/honeysql/format.clj

@@ -174,6 +174,7 @@
    :select 50
    :insert-into 60
    :update 70
+   :delete 75
    :delete-from 80
    :columns 90
    :set 100
@@ -456,6 +457,9 @@
 (defmethod format-clause :delete-from [[_ table] _]
   (str "DELETE FROM " (to-sql table)))
 
+(defmethod format-clause :delete [[_ table] _]
+  (str "DELETE " (to-sql table)))
+
 (defn cte->sql
   [[cte-name query]]
   (str (to-sql cte-name) " AS " (to-sql query)))

src/honeysql/helpers.clj

@@ -220,6 +220,13 @@
   ([table] (delete-from nil table))
   ([m table] (build-clause :delete-from m table)))
 
+(defmethod build-clause :delete [_ m table]
+  (assoc m :delete table))
+
+(defn delete
+  ([table] (delete nil table))
+  ([m table] (build-clause :delete m table)))
+  
 (defmethod build-clause :with [_ m ctes]
   (assoc m :with ctes))