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#pragma once
#include <Core/NamesAndAliases.h>
#include <Core/NamesAndTypes.h>
#include <Interpreters/SystemLog.h>
#include <Common/Stopwatch.h>
#include <Common/Priority.h>
namespace DB
{
enum class FilesystemPrefetchState
{
USED,
CANCELLED_WITH_SEEK,
CANCELLED_WITH_RANGE_CHANGE,
UNNEEDED,
};
struct FilesystemReadPrefetchesLogElement
{
time_t event_time{};
String query_id;
String path;
UInt64 offset;
Int64 size; /// -1 means unknown
std::chrono::system_clock::time_point prefetch_submit_time;
std::optional<Stopwatch> execution_watch;
Priority priority;
FilesystemPrefetchState state;
UInt64 thread_id;
String reader_id;
static std::string name() { return "FilesystemReadPrefetchesLog"; }
static NamesAndTypesList getNamesAndTypes();
static NamesAndAliases getNamesAndAliases() { return {}; }
void appendToBlock(MutableColumns & columns) const;
static const char * getCustomColumnList() { return nullptr; }
};
class FilesystemReadPrefetchesLog : public SystemLog<FilesystemReadPrefetchesLogElement>
{
public:
using SystemLog<FilesystemReadPrefetchesLogElement>::SystemLog;
};
using FilesystemReadPrefetchesLogPtr = std::shared_ptr<FilesystemReadPrefetchesLog>;
}
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