bind parameters are now typecast

activerecord/lib/active_record/connection_adapters/postgresql_adapter.rb

@@ -532,7 +532,9 @@ module ActiveRecord
 
           # Clear the queue
           @connection.get_last_result
-          @connection.send_query_prepared(key, binds.map { |col, val| val })
+          @connection.send_query_prepared(key, binds.map { |col, val|
+            col ? col.type_cast(val) : val
+          })
           @connection.block
           result = @connection.get_last_result
           ActiveRecord::Result.new(result.fields, result_as_array(result))

activerecord/test/cases/adapters/postgresql/postgresql_adapter_test.rb

@@ -41,6 +41,20 @@ module ActiveRecord
 
         assert_equal [['1', 'foo']], result.rows
       end
+
+      def test_exec_typecasts_bind_vals
+        string = @connection.quote('foo')
+        @connection.exec("INSERT INTO ex (id, data) VALUES (1, #{string})")
+
+        column = @connection.columns('ex').find { |col| col.name == 'id' }
+        result = @connection.exec(
+          'SELECT id, data FROM ex WHERE id = $1', nil, [[column, '1-fuu']])
+
+        assert_equal 1, result.rows.length
+        assert_equal 2, result.columns.length
+
+        assert_equal [['1', 'foo']], result.rows
+      end
     end
   end
 end