| 11 | { |
| 12 | |
| 13 | static ITransformingStep::Traits getTraits(bool preserves_sorting) |
| 14 | { |
| 15 | return ITransformingStep::Traits |
| 16 | { |
| 17 | { |
| 18 | .returns_single_stream = false, |
| 19 | .preserves_number_of_streams = true, |
| 20 | .preserves_sorting = preserves_sorting, |
| 21 | }, |
| 22 | { |
| 23 | .preserves_number_of_rows = true |
| 24 | } |
| 25 | }; |
| 26 | } |
| 27 | |
| 28 | static Block addWindowFunctionResultColumns(const Block & block, |
| 29 | std::vector<WindowFunctionDescription> window_functions) |