aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/clickhouse/src/Processors/QueryPlan/ExtremesStep.h
blob: 57ccef077aaec456fe1d9924bc15b11d0cca5152 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
#pragma once
#include <Processors/QueryPlan/ITransformingStep.h>
namespace DB
{

/// Calculate extremes. Add special port for extremes.
class ExtremesStep : public ITransformingStep
{
public:
    explicit ExtremesStep(const DataStream & input_stream_);

    String getName() const override { return "Extremes"; }

    void transformPipeline(QueryPipelineBuilder & pipeline, const BuildQueryPipelineSettings &) override;

private:
    void updateOutputStream() override
    {
        output_stream = createOutputStream(input_streams.front(), input_streams.front().header, getDataStreamTraits());
    }
};

}