ClickHouse/src/Processors/printPipeline.h
2020-05-23 22:35:08 +03:00

64 lines
1.6 KiB
C++

#pragma once
#include <Processors/IProcessor.h>
#include <IO/Operators.h>
namespace DB
{
/** Print pipeline in "dot" format for GraphViz.
* You can render it with:
* dot -T png < pipeline.dot > pipeline.png
*/
template <typename Processors, typename Statuses>
void printPipeline(const Processors & processors, const Statuses & statuses, WriteBuffer & out)
{
out << "digraph\n{\n";
auto get_proc_id = [](const IProcessor & proc) -> UInt64
{
return reinterpret_cast<std::uintptr_t>(&proc);
};
auto statuses_iter = statuses.begin();
/// Nodes // TODO quoting and escaping
for (const auto & processor : processors)
{
out << "n" << get_proc_id(*processor) << "[label=\"" << processor->getName() << processor->getDescription();
if (statuses_iter != statuses.end())
{
out << " (" << IProcessor::statusToName(*statuses_iter) << ")";
++statuses_iter;
}
out << "\"];\n";
}
/// Edges
for (const auto & processor : processors)
{
for (const auto & port : processor->getOutputs())
{
if (!port.isConnected())
continue;
const IProcessor & curr = *processor;
const IProcessor & next = port.getInputPort().getProcessor();
out << "n" << get_proc_id(curr) << " -> n" << get_proc_id(next) << ";\n";
}
}
out << "}\n";
}
template <typename Processors>
void printPipeline(const Processors & processors, WriteBuffer & out)
{
printPipeline(processors, std::vector<IProcessor::Status>(), out);
}
}