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#include <exception>
#include <Processors/QueryPlan/CreatingSetsStep.h>
#include <Processors/QueryPlan/QueryPlan.h>
//#include <Processors/QueryPlan/BuildQueryPipelineSettings.h>
#include <Processors/QueryPlan/Optimizations/QueryPlanOptimizationSettings.h>
#include <QueryPipeline/QueryPipelineBuilder.h>
#include <Processors/Transforms/CreatingSetsTransform.h>
#include <IO/Operators.h>
#include <Interpreters/ExpressionActions.h>
#include <Common/JSONBuilder.h>
#include <Interpreters/PreparedSets.h>
#include <Interpreters/Context.h>
namespace DB
{
namespace ErrorCodes
{
extern const int LOGICAL_ERROR;
}
static ITransformingStep::Traits getTraits()
{
return ITransformingStep::Traits
{
{
.returns_single_stream = false,
.preserves_number_of_streams = true,
.preserves_sorting = true,
},
{
.preserves_number_of_rows = true,
}
};
}
CreatingSetStep::CreatingSetStep(
const DataStream & input_stream_,
SetAndKeyPtr set_and_key_,
StoragePtr external_table_,
SizeLimits network_transfer_limits_,
ContextPtr context_)
: ITransformingStep(input_stream_, Block{}, getTraits())
, set_and_key(std::move(set_and_key_))
, external_table(std::move(external_table_))
, network_transfer_limits(std::move(network_transfer_limits_))
, context(std::move(context_))
{
}
void CreatingSetStep::transformPipeline(QueryPipelineBuilder & pipeline, const BuildQueryPipelineSettings &)
{
pipeline.addCreatingSetsTransform(getOutputStream().header, std::move(set_and_key), std::move(external_table), network_transfer_limits, context->getPreparedSetsCache());
}
void CreatingSetStep::updateOutputStream()
{
output_stream = createOutputStream(input_streams.front(), Block{}, getDataStreamTraits());
}
void CreatingSetStep::describeActions(FormatSettings & settings) const
{
String prefix(settings.offset, ' ');
settings.out << prefix;
if (set_and_key->set)
settings.out << "Set: ";
settings.out << set_and_key->key << '\n';
}
void CreatingSetStep::describeActions(JSONBuilder::JSONMap & map) const
{
if (set_and_key->set)
map.add("Set", set_and_key->key);
}
CreatingSetsStep::CreatingSetsStep(DataStreams input_streams_)
{
if (input_streams_.empty())
throw Exception(ErrorCodes::LOGICAL_ERROR, "CreatingSetsStep cannot be created with no inputs");
input_streams = std::move(input_streams_);
output_stream = DataStream{input_streams.front().header};
for (size_t i = 1; i < input_streams.size(); ++i)
if (input_streams[i].header)
throw Exception(ErrorCodes::LOGICAL_ERROR, "Creating set input must have empty header. Got: {}",
input_streams[i].header.dumpStructure());
}
QueryPipelineBuilderPtr CreatingSetsStep::updatePipeline(QueryPipelineBuilders pipelines, const BuildQueryPipelineSettings &)
{
if (pipelines.empty())
throw Exception(ErrorCodes::LOGICAL_ERROR, "CreatingSetsStep cannot be created with no inputs");
auto main_pipeline = std::move(pipelines.front());
if (pipelines.size() == 1)
return main_pipeline;
pipelines.erase(pipelines.begin());
QueryPipelineBuilder delayed_pipeline;
if (pipelines.size() > 1)
{
QueryPipelineProcessorsCollector collector(delayed_pipeline, this);
delayed_pipeline = QueryPipelineBuilder::unitePipelines(std::move(pipelines));
processors = collector.detachProcessors();
}
else
delayed_pipeline = std::move(*pipelines.front());
QueryPipelineProcessorsCollector collector(*main_pipeline, this);
main_pipeline->addPipelineBefore(std::move(delayed_pipeline));
auto added_processors = collector.detachProcessors();
processors.insert(processors.end(), added_processors.begin(), added_processors.end());
return main_pipeline;
}
void CreatingSetsStep::describePipeline(FormatSettings & settings) const
{
IQueryPlanStep::describePipeline(processors, settings);
}
void addCreatingSetsStep(QueryPlan & query_plan, PreparedSets::Subqueries subqueries, ContextPtr context)
{
DataStreams input_streams;
input_streams.emplace_back(query_plan.getCurrentDataStream());
std::vector<std::unique_ptr<QueryPlan>> plans;
plans.emplace_back(std::make_unique<QueryPlan>(std::move(query_plan)));
query_plan = QueryPlan();
for (auto & future_set : subqueries)
{
if (future_set->get())
continue;
auto plan = future_set->build(context);
if (!plan)
continue;
input_streams.emplace_back(plan->getCurrentDataStream());
plans.emplace_back(std::move(plan));
}
if (plans.size() == 1)
{
query_plan = std::move(*plans.front());
return;
}
auto creating_sets = std::make_unique<CreatingSetsStep>(std::move(input_streams));
creating_sets->setStepDescription("Create sets before main query execution");
query_plan.unitePlans(std::move(creating_sets), std::move(plans));
}
std::vector<std::unique_ptr<QueryPlan>> DelayedCreatingSetsStep::makePlansForSets(DelayedCreatingSetsStep && step)
{
std::vector<std::unique_ptr<QueryPlan>> plans;
for (auto & future_set : step.subqueries)
{
if (future_set->get())
continue;
auto plan = future_set->build(step.context);
if (!plan)
continue;
plan->optimize(QueryPlanOptimizationSettings::fromContext(step.context));
plans.emplace_back(std::move(plan));
}
return plans;
}
void addCreatingSetsStep(QueryPlan & query_plan, PreparedSetsPtr prepared_sets, ContextPtr context)
{
if (!prepared_sets)
return;
auto subqueries = prepared_sets->getSubqueries();
if (subqueries.empty())
return;
addCreatingSetsStep(query_plan, std::move(subqueries), context);
}
DelayedCreatingSetsStep::DelayedCreatingSetsStep(
DataStream input_stream, PreparedSets::Subqueries subqueries_, ContextPtr context_)
: subqueries(std::move(subqueries_)), context(std::move(context_))
{
input_streams = {input_stream};
output_stream = std::move(input_stream);
}
QueryPipelineBuilderPtr DelayedCreatingSetsStep::updatePipeline(QueryPipelineBuilders, const BuildQueryPipelineSettings &)
{
throw Exception(
ErrorCodes::LOGICAL_ERROR,
"Cannot build pipeline in DelayedCreatingSets. This step should be optimized out.");
}
}
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