mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-17 21:24:28 +00:00
78 lines
1.9 KiB
C++
78 lines
1.9 KiB
C++
#include <Core/SortDescription.h>
|
|
#include <Core/Block.h>
|
|
#include <IO/Operators.h>
|
|
#include <Common/JSONBuilder.h>
|
|
|
|
namespace DB
|
|
{
|
|
|
|
void dumpSortDescription(const SortDescription & description, const Block & header, WriteBuffer & out)
|
|
{
|
|
bool first = true;
|
|
|
|
for (const auto & desc : description)
|
|
{
|
|
if (!first)
|
|
out << ", ";
|
|
first = false;
|
|
|
|
if (!desc.column_name.empty())
|
|
out << desc.column_name;
|
|
else
|
|
{
|
|
if (desc.column_number < header.columns())
|
|
out << header.getByPosition(desc.column_number).name;
|
|
else
|
|
out << "?";
|
|
|
|
out << " (pos " << desc.column_number << ")";
|
|
}
|
|
|
|
if (desc.direction > 0)
|
|
out << " ASC";
|
|
else
|
|
out << " DESC";
|
|
|
|
if (desc.with_fill)
|
|
out << " WITH FILL";
|
|
}
|
|
}
|
|
|
|
void SortColumnDescription::explain(JSONBuilder::JSONMap & map, const Block & header) const
|
|
{
|
|
if (!column_name.empty())
|
|
map.add("Column", column_name);
|
|
else
|
|
{
|
|
if (column_number < header.columns())
|
|
map.add("Column", header.getByPosition(column_number).name);
|
|
|
|
map.add("Position", column_number);
|
|
}
|
|
|
|
map.add("Ascending", direction > 0);
|
|
map.add("With Fill", with_fill);
|
|
}
|
|
|
|
std::string dumpSortDescription(const SortDescription & description)
|
|
{
|
|
WriteBufferFromOwnString wb;
|
|
dumpSortDescription(description, Block{}, wb);
|
|
return wb.str();
|
|
}
|
|
|
|
JSONBuilder::ItemPtr explainSortDescription(const SortDescription & description, const Block & header)
|
|
{
|
|
auto json_array = std::make_unique<JSONBuilder::JSONArray>();
|
|
for (const auto & descr : description)
|
|
{
|
|
auto json_map = std::make_unique<JSONBuilder::JSONMap>();
|
|
descr.explain(*json_map, header);
|
|
json_array->add(std::move(json_map));
|
|
}
|
|
|
|
return json_array;
|
|
}
|
|
|
|
}
|