ClickHouse/src/Client/InternalTextLogs.h

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#pragma once
#include <IO/WriteBuffer.h>
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#include <Core/Block.h>
namespace DB
{
/// Prints internal server logs or profile events with colored output (if requested).
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/// NOTE: IRowOutputFormat does not suite well for this case
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class InternalTextLogs
{
public:
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InternalTextLogs(WriteBuffer & buf_out, bool color_) : wb(buf_out), color(color_) {}
/// Print internal server logs
///
/// Input blocks have to have the same structure as SystemLogsQueue::getSampleBlock():
/// - event_time
/// - event_time_microseconds
/// - host_name
/// - query_id
/// - thread_id
/// - priority
/// - source
/// - text
void writeLogs(const Block & block);
/// Print profile events.
///
/// Block:
/// - host_name
/// - current_time
/// - thread_id
/// - type
/// - name
/// - value
///
/// See also TCPHandler::sendProfileEvents() for block columns.
void writeProfileEvents(const Block & block);
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void flush()
{
wb.next();
}
private:
WriteBuffer & wb;
bool color;
};
}