allow exec to receive any object arguments

spec/custom_drivers_types_spec.cr

@@ -72,8 +72,8 @@ class FooDriver < DB::Driver
       GenericResultSet(Any).new(self, FooDriver.fake_row)
     end
 
-    protected def perform_exec(args : Slice(DB::Any)) : DB::ExecResult
-      raise "Not implemented"
+    protected def perform_exec(args : Enumerable) : DB::ExecResult
+      DB::ExecResult.new 0, 0i64
     end
   end
 end
@@ -114,8 +114,8 @@ class BarDriver < DB::Driver
       GenericResultSet(Any).new(self, BarDriver.fake_row)
     end
 
-    protected def perform_exec(args : Slice(DB::Any)) : DB::ExecResult
-      raise "Not implemented"
+    protected def perform_exec(args : Enumerable) : DB::ExecResult
+      DB::ExecResult.new 0, 0i64
     end
   end
 end
@@ -193,4 +193,26 @@ describe DB do
       db.query("query", [1, "string", BarValue.new(5)]).close
     end
   end
+
+  it "allow custom types to be used as arguments for exec" do
+    DB.open("foo://host") do |db|
+      FooDriver.fake_row = [1, "string"] of FooDriver::Any
+      db.exec("query")
+      db.exec("query", 1)
+      db.exec("query", 1, "string")
+      db.exec("query", Slice(UInt8).new(4))
+      db.exec("query", 1, "string", FooValue.new(5))
+      db.exec("query", [1, "string", FooValue.new(5)])
+    end
+
+    DB.open("bar://host") do |db|
+      BarDriver.fake_row = [1, "string"] of BarDriver::Any
+      db.exec("query")
+      db.exec("query", 1)
+      db.exec("query", 1, "string")
+      db.exec("query", Slice(UInt8).new(4))
+      db.exec("query", 1, "string", BarValue.new(5))
+      db.exec("query", [1, "string", BarValue.new(5)])
+    end
+  end
 end

spec/dummy_driver.cr

@@ -47,7 +47,7 @@ class DummyDriver < DB::Driver
       DummyResultSet.new self, @query
     end
 
-    protected def perform_exec(args : Slice(DB::Any))
+    protected def perform_exec(args : Enumerable)
       set_params args
       DB::ExecResult.new 0, 0_i64
     end

src/db/query_methods.cr

@@ -40,7 +40,7 @@ module DB
       end
     end
 
-    # Performs the `query` discarding any response
+    # Performs the `query` and returns an `ExecResult`
     def exec(query, *args)
       prepare(query).exec(*args)
     end

src/db/statement.cr

@@ -27,18 +27,18 @@ module DB
 
     # See `QueryMethods#exec`
     def exec
-      perform_exec_and_release(Slice(Any).new(0)) # no overload matches ... with types Slice(NoReturn)
+      perform_exec_and_release(Slice(Any).new(0))
     end
 
     # See `QueryMethods#exec`
-    def exec(args : Enumerable(Any))
-      perform_exec_and_release(args.to_a.to_unsafe.to_slice(args.size))
+    def exec(args : Array)
+      perform_exec_and_release(args)
     end
 
     # See `QueryMethods#exec`
     def exec(*args)
       # TODO better way to do it
-      perform_exec_and_release(args.to_a.to_unsafe.to_slice(args.size))
+      perform_exec_and_release(args)
     end
 
     # See `QueryMethods#scalar`
@@ -96,13 +96,13 @@ module DB
       end
     end
 
-    private def perform_exec_and_release(args : Slice(Any)) : ExecResult
+    private def perform_exec_and_release(args : Enumerable) : ExecResult
       perform_exec(args).tap do
         release_connection
       end
     end
 
     protected abstract def perform_query(args : Enumerable) : ResultSet
-    protected abstract def perform_exec(args : Slice(Any)) : ExecResult
+    protected abstract def perform_exec(args : Enumerable) : ExecResult
   end
 end