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#include "WatermarkTransform.h"
#include <Columns/ColumnTuple.h>
#include <Columns/ColumnsNumber.h>
#include <Storages/WindowView/StorageWindowView.h>
namespace DB
{
WatermarkTransform::WatermarkTransform(
const Block & header_,
StorageWindowView & storage_,
const String & window_column_name_,
UInt32 lateness_upper_bound_)
: ISimpleTransform(header_, header_, false)
, block_header(header_)
, storage(storage_)
, window_column_name(window_column_name_)
, lateness_upper_bound(lateness_upper_bound_)
{
}
WatermarkTransform::~WatermarkTransform()
{
if (max_watermark)
storage.updateMaxWatermark(max_watermark);
if (lateness_upper_bound)
storage.addFireSignal(late_signals);
}
void WatermarkTransform::transform(Chunk & chunk)
{
auto num_rows = chunk.getNumRows();
auto columns = chunk.detachColumns();
auto column_window_idx = block_header.getPositionByName(window_column_name);
const auto & window_column = columns[column_window_idx];
const ColumnUInt32::Container & window_end_data = static_cast<const ColumnUInt32 &>(*window_column).getData();
for (const auto & ts : window_end_data)
{
if (ts > max_watermark)
max_watermark = ts;
if (lateness_upper_bound && ts <= lateness_upper_bound)
late_signals.insert(ts);
}
chunk.setColumns(std::move(columns), num_rows);
}
}
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