| 467 | void finalize() override {} |
| 468 | |
| 469 | ColumnPtr generate(const IColumn & column) override |
| 470 | { |
| 471 | const auto & src_data = assert_cast<const ColumnVector<UInt32> &>(column).getData(); |
| 472 | size_t size = src_data.size(); |
| 473 | |
| 474 | auto res_column = ColumnVector<UInt32>::create(size); |
| 475 | auto & res_data = assert_cast<ColumnVector<UInt32> &>(*res_column).getData(); |
| 476 | |
| 477 | for (size_t i = 0; i < size; ++i) |
| 478 | { |
| 479 | UInt32 src_datetime = src_data[i]; |
| 480 | UInt32 src_date = date_lut.toDate(src_datetime); |
| 481 | |
| 482 | Int32 src_diff = src_datetime - src_prev_value; |
| 483 | Int32 res_diff = transformSigned(src_diff, seed); |
| 484 | |
| 485 | UInt32 new_datetime = res_prev_value + res_diff; |
| 486 | UInt32 new_time = new_datetime - date_lut.toDate(new_datetime); |
| 487 | res_data[i] = src_date + new_time; |
| 488 | |
| 489 | src_prev_value = src_datetime; |
| 490 | res_prev_value = res_data[i]; |
| 491 | } |
| 492 | |
| 493 | return res_column; |
| 494 | } |
| 495 | |
| 496 | void updateSeed() override |
| 497 | { |
nothing calls this directly
no test coverage detected