mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-13 18:02:24 +00:00
114 lines
2.9 KiB
C++
114 lines
2.9 KiB
C++
#include <Processors/QueryPlan/IQueryPlanStep.h>
|
||
#include <Processors/IProcessor.h>
|
||
#include <IO/Operators.h>
|
||
|
||
namespace DB
|
||
{
|
||
|
||
namespace ErrorCodes
|
||
{
|
||
extern const int LOGICAL_ERROR;
|
||
}
|
||
|
||
const DataStream & IQueryPlanStep::getOutputStream() const
|
||
{
|
||
if (!hasOutputStream())
|
||
throw Exception("QueryPlanStep " + getName() + " does not have output stream.", ErrorCodes::LOGICAL_ERROR);
|
||
|
||
return *output_stream;
|
||
}
|
||
|
||
static void doDescribeHeader(const Block & header, size_t count, IQueryPlanStep::FormatSettings & settings)
|
||
{
|
||
String prefix(settings.offset, settings.indent_char);
|
||
prefix += "Header";
|
||
|
||
if (count > 1)
|
||
prefix += " × " + std::to_string(count) + " ";
|
||
|
||
prefix += ": ";
|
||
|
||
settings.out << prefix;
|
||
|
||
if (!header)
|
||
{
|
||
settings.out << " empty\n";
|
||
return;
|
||
}
|
||
|
||
prefix.assign(prefix.size(), settings.indent_char);
|
||
bool first = true;
|
||
|
||
for (const auto & elem : header)
|
||
{
|
||
if (!first)
|
||
settings.out << prefix;
|
||
|
||
first = false;
|
||
elem.dumpNameAndType(settings.out);
|
||
settings.out << ": ";
|
||
elem.dumpStructure(settings.out);
|
||
settings.out << '\n';
|
||
}
|
||
}
|
||
|
||
static void doDescribeProcessor(const IProcessor & processor, size_t count, IQueryPlanStep::FormatSettings & settings)
|
||
{
|
||
settings.out << String(settings.offset, settings.indent_char) << processor.getName();
|
||
if (count > 1)
|
||
settings.out << " × " << std::to_string(count);
|
||
|
||
size_t num_inputs = processor.getInputs().size();
|
||
size_t num_outputs = processor.getOutputs().size();
|
||
if (num_inputs != 1 || num_outputs != 1)
|
||
settings.out << " " << std::to_string(num_inputs) << " → " << std::to_string(num_outputs);
|
||
|
||
settings.out << '\n';
|
||
|
||
if (settings.write_header)
|
||
{
|
||
const Block * last_header = nullptr;
|
||
size_t num_equal_headers = 0;
|
||
|
||
for (const auto & port : processor.getOutputs())
|
||
{
|
||
if (last_header && !blocksHaveEqualStructure(*last_header, port.getHeader()))
|
||
{
|
||
doDescribeHeader(*last_header, num_equal_headers, settings);
|
||
num_equal_headers = 0;
|
||
}
|
||
|
||
++num_equal_headers;
|
||
last_header = &port.getHeader();
|
||
}
|
||
|
||
if (last_header)
|
||
doDescribeHeader(*last_header, num_equal_headers, settings);
|
||
}
|
||
|
||
settings.offset += settings.indent;
|
||
}
|
||
|
||
void IQueryPlanStep::describePipeline(const Processors & processors, FormatSettings & settings)
|
||
{
|
||
const IProcessor * prev = nullptr;
|
||
size_t count = 0;
|
||
|
||
for (auto it = processors.rbegin(); it != processors.rend(); ++it)
|
||
{
|
||
if (prev && prev->getName() != (*it)->getName())
|
||
{
|
||
doDescribeProcessor(*prev, count, settings);
|
||
count = 0;
|
||
}
|
||
|
||
++count;
|
||
prev = it->get();
|
||
}
|
||
|
||
if (prev)
|
||
doDescribeProcessor(*prev, count, settings);
|
||
}
|
||
|
||
}
|