applier_version.h

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#ifndef MYSQL_CS_APPLY_APPLIER_VERSION_H
#define MYSQL_CS_APPLY_APPLIER_VERSION_H
 
namespace cs::apply {
 
/// @struct Applier_version
/// @brief Enumerates the available versions of the applier.
///
/// This enum defines the different applier versions that can be used in the
/// system.
struct Applier_version {
  /// Required by system tables and PFS when no specific version is chosen.
  static constexpr unsigned int unspecified{0};
  /// Use Multi-threaded Applier (MTA) for replication.
  static constexpr unsigned int mta{1};
  /// Use Change Stream Applier (CSA) for replication.
  static constexpr unsigned int csa{2};
  /// An unknown or invalid applier version, used as an end guard.
  static constexpr unsigned int unknown{3};
};
 
}  // namespace cs::apply
 
#endif  // MYSQL_CS_APPLY_APPLIER_VERSION_H