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23 lines
482 B
C++
23 lines
482 B
C++
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#pragma once
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#include <Processors/QueryPlan/IQueryPlanStep.h>
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namespace DB
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{
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class UnionStep : public IQueryPlanStep
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{
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public:
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/// max_threads is used to limit the number of threads for result pipeline.
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UnionStep(DataStreams input_streams_, Block result_header, size_t max_threads_);
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String getName() const override { return "Union"; }
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QueryPipelinePtr updatePipeline(QueryPipelines pipelines) override;
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private:
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Block header;
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size_t max_threads;
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};
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}
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