docs: public static AbstractShowParser newInstance(final DatabaseType dbType, final ShardingRule shardingRule, final LexerEngine lexerEngine) {
          switch (dbType) {
              case H2:
              case MySQL:
                  return new MySQLShowParser(shardingRule, lexerEngine);
              default:
                  throw new UnsupportedOperationException(String.format("Cannot support database [%s].", dbType));
          }
      }