docs: public Query getMiniSelectQuery(Collection<String> columns, Collection<Match> matches) {
          int matchSize = matches == null ? 0 : matches.size();
  
          int maxSqlLength = matches == null ? 50 : (matchSize + 3) * 10;
          StringBuilder sb = new StringBuilder(maxSqlLength);
  
          // SQL语句和参数列表的构造
          sb.append("select ");
          if (columns == null || columns.size() == 0) {
              sb.append("*,");
          } else {
              for (String column : columns) {
                  sb.append(column).append(',');
              }
          }
          sb.deleteCharAt(sb.length() - 1);
          sb.append(" from ").append(dao.getTableName());
  
          if (matchSize == 0) {
              return new Query(sb.toString(), new ArrayList<Object>(0));
          }
  
          // 如果有条件
          List<Object> params = new ArrayList<Object>(matchSize + 1);
          appendQuerytoSQL(matches, sb, params);
          return new Query(sb.toString(), params);
      }