code: protected Map<String, String> getTableComments(DatabaseConfig config) throws SQLException {
          ResultSet rs = dbMetadataUtils.getDatabaseMetaData().getTables(config.getCatalog(), config.getSchemaPattern(), config.getTableNamePattern(), null);
          Map<String, String> answer = new HashMap<String, String>();
          while (rs.next()) {
              answer.put(rs.getString("TABLE_NAME"), rs.getString("REMARKS"));
          }
          closeResultSet(rs);
          return answer;
      }
docs: 获取表名和注释映射
  
  @param config
  @return
  @throws SQLException