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#pragma once
#include <Processors/IProcessor.h>
namespace DB
{
class ISource : public IProcessor
{
private:
ReadProgressCounters read_progress;
bool read_progress_was_set = false;
bool auto_progress;
protected:
OutputPort & output;
bool has_input = false;
bool finished = false;
bool got_exception = false;
Port::Data current_chunk;
std::shared_ptr<const StorageLimitsList> storage_limits;
virtual Chunk generate();
virtual std::optional<Chunk> tryGenerate();
virtual void progress(size_t read_rows, size_t read_bytes);
public:
explicit ISource(Block header, bool enable_auto_progress = true);
~ISource() override;
Status prepare() override;
void work() override;
OutputPort & getPort() { return output; }
const OutputPort & getPort() const { return output; }
void setStorageLimits(const std::shared_ptr<const StorageLimitsList> & storage_limits_) override;
/// Default implementation for all the sources.
std::optional<ReadProgress> getReadProgress() final;
void addTotalRowsApprox(size_t value) { read_progress.total_rows_approx += value; }
void addTotalBytes(size_t value) { read_progress.total_bytes += value; }
};
using SourcePtr = std::shared_ptr<ISource>;
}
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