| 49 | virtual void setRowsBeforeLimit(size_t /*rows_before_limit*/) {} |
| 50 | virtual void setTotals(const Block & /*totals*/) {} |
| 51 | virtual void setExtremes(const Block & /*extremes*/) {} |
| 52 | |
| 53 | /** Notify about progress. Method could be called from different threads. |
| 54 | * Passed value are delta, that must be summarized. |