mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-22 01:30:51 +00:00
49 lines
1.0 KiB
C++
49 lines
1.0 KiB
C++
#pragma once
|
|
|
|
#include <DB/IO/ReadBufferFromString.h>
|
|
|
|
#include <DB/Interpreters/executeQuery.h>
|
|
#include <DB/Interpreters/IInterpreter.h>
|
|
|
|
#include <DB/Parsers/ASTQueryWithOutput.h>
|
|
#include <DB/Parsers/ASTIdentifier.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
|
|
/** Вернуть список запросов, исполняющихся прямо сейчас.
|
|
*/
|
|
class InterpreterShowProcesslistQuery : public IInterpreter
|
|
{
|
|
public:
|
|
InterpreterShowProcesslistQuery(ASTPtr query_ptr_, Context & context_)
|
|
: query_ptr(query_ptr_), context(context_) {}
|
|
|
|
BlockIO execute() override
|
|
{
|
|
return executeQuery(getRewrittenQuery(), context, true);
|
|
}
|
|
|
|
private:
|
|
ASTPtr query_ptr;
|
|
Context context;
|
|
|
|
String getRewrittenQuery()
|
|
{
|
|
const ASTQueryWithOutput & query = dynamic_cast<const ASTQueryWithOutput &>(*query_ptr);
|
|
|
|
std::stringstream rewritten_query;
|
|
rewritten_query << "SELECT * FROM system.processes";
|
|
|
|
if (query.format)
|
|
rewritten_query << " FORMAT " << typeid_cast<const ASTIdentifier &>(*query.format).name;
|
|
|
|
return rewritten_query.str();
|
|
}
|
|
};
|
|
|
|
|
|
}
|