vijinho / kohana2-legacy

            $by = explode(',', (string) $by);

        }

        foreach ($by as $val) {

            $val = trim($val);

            if ($val != '') {

                // Add the table prefix if we are using table.column names

                if (strpos($val, '.')) {

                    $val = $this->config['table_prefix'].$val;

                }

                $this->groupby[] = $this->driver->escape_column($val);

            }

        }

        return $this;

    }

            $key = array($key => $value);

        }

        foreach ($key as $k => $v) {

            // Add a table prefix if the column includes the table.

            if (strpos($k, '.')) {

                $k = $this->config['table_prefix'].$k;

            }

            $this->set[$k] = $this->driver->escape($v);

        }

        return $this;

    }