public getMetrics ( $metricType = null, $columns = [], $filter = [], $orderBy = [], $range = null ) : null | array | ||
$metricType | null|integer|array metrics selection | |
$columns | integer|array column (aggregation level) selection | |
$orderBy | array order criteria | |
$range | null|DBResultRange paging specification | |
return | null | array | The selected data as a simple tabular result set or null if metrics are not supported by this journal. |