CheckClusterVersion check TiKV version.

CheckTiDBVersion is equals to ExtractTiDBVersion followed by CheckVersion.

CheckVersion checks if the actual version is within [requiredMinVersion, requiredMaxVersion).

CheckVersionForBackup checks the version for backup and.

CheckVersionForBR checks whether version of the cluster and BR itself is compatible.

CheckVersionForBRPiTR checks whether version of the cluster and BR-pitr itself is compatible.

CheckVersionForDDL checks whether we use queue or table to execute ddl during restore.

CheckVersionForKeyspaceBR checks whether the cluster is support Backup/Restore keyspace data.

ExtractTiDBVersion extracts TiDB version from TiDB SQL `version()` outputs.

FetchVersion gets the version information from the database server NOTE: the executed query will be: - `select tidb_version()` if target db is tidb - `select version()` if target db is not tidb.

NextMajorVersion returns the next major version.

NormalizeBackupVersion normalizes the version string from backupmeta.

ParseServerInfo parses exported server type and version info from version string.

ServerTypeAll represents All server types.

ServerTypeMariaDB represents MariaDB server type.

ServerTypeMySQL represents MySQL server type.

ServerTypeTiDB represents TiDB server type.

ServerTypeUnknown represents unknown server type.

Once TableInfoVersion updated.

ServerInfo is the combination of ServerType and ServerInfo.

VerChecker is a callback for the CheckClusterVersion, decides whether the cluster is suitable to execute restore.