Allowed memory size of 134217728 bytes exhausted (tried to allocate 2621440 bytes)

                    $count  = count($fields);                    $key1   = array_shift($fields);                    $key2   = $fields ? array_shift($fields) : '';                    $key    = $key ?: $key1;                    if (strpos($key, '.')) {                        list($alias, $key) = explode('.', $key);                    }                    foreach ($resultSet as $val) {                        if ($count > 2) {                            $result[$val[$key]] = $val;                        } elseif (2 == $count) {                            $result[$val[$key]] = $val[$key2];                        } elseif (1 == $count) {                            $result[$val[$key]] = $val[$key1];                        }                    }                } else {                    $result = [];                }