engine.hpp 1.11 KB
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#pragma once

/**
 * Interface to provide non-portable behaviour, specific to each
 * database engine we want to support.
 *
 * Everything else (all portable stuf) should go outside of this class.
 */

#include <database/statement.hpp>

#include <memory>
#include <string>
#include <vector>
#include <tuple>
#include <set>

class DatabaseEngine
{
 public:

  DatabaseEngine() = default;
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  virtual ~DatabaseEngine() = default;
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  DatabaseEngine(const DatabaseEngine&) = delete;
  DatabaseEngine& operator=(const DatabaseEngine&) = delete;
  DatabaseEngine(DatabaseEngine&&) = delete;
  DatabaseEngine& operator=(DatabaseEngine&&) = delete;

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  virtual std::set<std::string> get_all_columns_from_table(const std::string& table_name) = 0;
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  virtual std::tuple<bool, std::string> raw_exec(const std::string& query) = 0;
  virtual std::unique_ptr<Statement> prepare(const std::string& query) = 0;
  virtual void extract_last_insert_rowid(Statement& statement) = 0;
  virtual std::string get_returning_id_sql_string(const std::string&)
  {
    return {};
  }
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  virtual std::string id_column_type() = 0;
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  int64_t last_inserted_rowid{-1};
};