mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-17 21:24:28 +00:00
102 lines
2.3 KiB
C++
102 lines
2.3 KiB
C++
#pragma once
|
|
|
|
#include <DB/Core/Defines.h>
|
|
#include <DB/IO/ReadBuffer.h>
|
|
#include <DB/IO/WriteBuffer.h>
|
|
#include <DB/IO/ReadHelpers.h>
|
|
#include <DB/IO/WriteHelpers.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
|
|
/** Progress of query execution.
|
|
* Values, transferred over network are deltas - how much was done after previously sent value.
|
|
* The same struct is also used for summarized values.
|
|
*/
|
|
struct Progress
|
|
{
|
|
std::atomic<size_t> rows {0}; /// Rows (source) processed.
|
|
std::atomic<size_t> bytes {0}; /// Bytes (uncompressed, source) processed.
|
|
|
|
/** How much rows must be processed, in total, approximately. Non-zero value is sent when there is information about some new part of job.
|
|
* Received values must be summed to get estimate of total rows to process.
|
|
* Used for rendering progress bar on client.
|
|
*/
|
|
std::atomic<size_t> total_rows {0};
|
|
|
|
Progress() {}
|
|
Progress(size_t rows_, size_t bytes_, size_t total_rows_ = 0)
|
|
: rows(rows_), bytes(bytes_), total_rows(total_rows_) {}
|
|
|
|
void read(ReadBuffer & in, UInt64 server_revision)
|
|
{
|
|
size_t new_rows = 0;
|
|
size_t new_bytes = 0;
|
|
size_t new_total_rows = 0;
|
|
|
|
readVarUInt(new_rows, in);
|
|
readVarUInt(new_bytes, in);
|
|
|
|
if (server_revision >= DBMS_MIN_REVISION_WITH_TOTAL_ROWS_IN_PROGRESS)
|
|
readVarUInt(new_total_rows, in);
|
|
|
|
rows = new_rows;
|
|
bytes = new_bytes;
|
|
total_rows = new_total_rows;
|
|
}
|
|
|
|
void write(WriteBuffer & out, UInt64 client_revision) const
|
|
{
|
|
writeVarUInt(rows, out);
|
|
writeVarUInt(bytes, out);
|
|
|
|
if (client_revision >= DBMS_MIN_REVISION_WITH_TOTAL_ROWS_IN_PROGRESS)
|
|
writeVarUInt(total_rows, out);
|
|
}
|
|
|
|
/// Each value separately is changed atomically (but not whole object).
|
|
void incrementPiecewiseAtomically(const Progress & rhs)
|
|
{
|
|
rows += rhs.rows;
|
|
bytes += rhs.bytes;
|
|
total_rows += rhs.total_rows;
|
|
}
|
|
|
|
void reset()
|
|
{
|
|
rows = 0;
|
|
bytes = 0;
|
|
total_rows = 0;
|
|
}
|
|
|
|
Progress fetchAndResetPiecewiseAtomically()
|
|
{
|
|
Progress res;
|
|
|
|
res.rows = rows.fetch_and(0);
|
|
res.bytes = bytes.fetch_and(0);
|
|
res.total_rows = total_rows.fetch_and(0);
|
|
|
|
return res;
|
|
}
|
|
|
|
Progress & operator=(Progress && other)
|
|
{
|
|
rows = other.rows.load(std::memory_order_relaxed);
|
|
bytes = other.bytes.load(std::memory_order_relaxed);
|
|
total_rows = other.total_rows.load(std::memory_order_relaxed);
|
|
|
|
return *this;
|
|
}
|
|
|
|
Progress(Progress && other)
|
|
{
|
|
*this = std::move(other);
|
|
}
|
|
};
|
|
|
|
|
|
}
|