classic_stmt_fetch_forwarder.h

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/*
  Copyright (c) 2023, 2026, Oracle and/or its affiliates.
 
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  it under the terms of the GNU General Public License, version 2.0,
  as published by the Free Software Foundation.
 
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*/
 
#ifndef ROUTING_SRC_PROCESSORS_FORWARDERS_CLASSIC_STMT_FETCH_FORWARDER_H_
#define ROUTING_SRC_PROCESSORS_FORWARDERS_CLASSIC_STMT_FETCH_FORWARDER_H_
 
#include "processors/base/forwarding_processor.h"
 
class StmtFetchForwarder : public ForwardingProcessor {
 public:
  using ForwardingProcessor::ForwardingProcessor;
 
  enum class Stage {
    Command,
    Response,
    EndOfRows,
    Row,
    Error,
    Done,
  };
 
  stdx::expected<Result, std::error_code> process() override;
 
  void stage(Stage stage) { stage_ = stage; }
  Stage stage() const { return stage_; }
 
  std::optional<std::string_view> diagnostic_stage_name() const override;
 
 private:
  stdx::expected<Result, std::error_code> command();
  stdx::expected<Result, std::error_code> response();
  stdx::expected<Result, std::error_code> row();
  stdx::expected<Result, std::error_code> end_of_rows();
  stdx::expected<Result, std::error_code> error();
 
  Stage stage_{Stage::Command};
};
 
#endif  // ROUTING_SRC_PROCESSORS_FORWARDERS_CLASSIC_STMT_FETCH_FORWARDER_H_