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#include <Processors/QueryPlan/FillingStep.h>
#include <Processors/Transforms/FillingTransform.h>
#include <QueryPipeline/QueryPipelineBuilder.h>
#include <IO/Operators.h>
#include <Common/JSONBuilder.h>
namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
}
static ITransformingStep::Traits getTraits()
{
return ITransformingStep::Traits
{
{
.returns_single_stream = true,
.preserves_number_of_streams = true,
.preserves_sorting = true,
},
{
.preserves_number_of_rows = false,
}
};
}
FillingStep::FillingStep(
const DataStream & input_stream_,
SortDescription sort_description_,
SortDescription fill_description_,
InterpolateDescriptionPtr interpolate_description_,
bool use_with_fill_by_sorting_prefix_)
: ITransformingStep(input_stream_, FillingTransform::transformHeader(input_stream_.header, sort_description_), getTraits())
, sort_description(std::move(sort_description_))
, fill_description(std::move(fill_description_))
, interpolate_description(interpolate_description_)
, use_with_fill_by_sorting_prefix(use_with_fill_by_sorting_prefix_)
{
if (!input_stream_.has_single_port)
throw Exception(ErrorCodes::LOGICAL_ERROR, "FillingStep expects single input");
}
void FillingStep::transformPipeline(QueryPipelineBuilder & pipeline, const BuildQueryPipelineSettings &)
{
pipeline.addSimpleTransform([&](const Block & header, QueryPipelineBuilder::StreamType stream_type) -> ProcessorPtr
{
if (stream_type == QueryPipelineBuilder::StreamType::Totals)
return std::make_shared<FillingNoopTransform>(header, fill_description);
return std::make_shared<FillingTransform>(
header, sort_description, fill_description, std::move(interpolate_description), use_with_fill_by_sorting_prefix);
});
}
void FillingStep::describeActions(FormatSettings & settings) const
{
settings.out << String(settings.offset, ' ');
dumpSortDescription(sort_description, settings.out);
settings.out << '\n';
}
void FillingStep::describeActions(JSONBuilder::JSONMap & map) const
{
map.add("Sort Description", explainSortDescription(sort_description));
}
void FillingStep::updateOutputStream()
{
if (!input_streams.front().has_single_port)
throw Exception(ErrorCodes::LOGICAL_ERROR, "FillingStep expects single input");
output_stream = createOutputStream(
input_streams.front(), FillingTransform::transformHeader(input_streams.front().header, sort_description), getDataStreamTraits());
}
}
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