seatunnel-datasource/seatunnel-datasource-plugins/datasource-jdbc-mysql/src/main/java/org/apache/seatunnel/datasource/plugin/mysql/jdbc/MysqlJdbcDataSourceChannel.java [134:160]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                while (resultSet.next()) {
                    TableField tableField = new TableField();
                    String columnName = resultSet.getString("COLUMN_NAME");
                    tableField.setPrimaryKey(false);
                    if (StringUtils.isNotBlank(primaryKey) && primaryKey.equals(columnName)) {
                        tableField.setPrimaryKey(true);
                    }
                    tableField.setName(columnName);
                    tableField.setType(resultSet.getString("TYPE_NAME"));
                    tableField.setComment(resultSet.getString("REMARKS"));
                    Object nullable = resultSet.getObject("IS_NULLABLE");
                    tableField.setNullable(Boolean.TRUE.toString().equals(nullable.toString()));
                    tableFields.add(tableField);
                }
            }
        } catch (ClassNotFoundException | SQLException e) {
            throw new DataSourcePluginException("get table fields failed", e);
        }
        return tableFields;
    }

    @Override
    public Map<String, List<TableField>> getTableFields(
            @NonNull String pluginName,
            @NonNull Map<String, String> requestParams,
            @NonNull String database,
            @NonNull List<String> tables) {
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -



seatunnel-datasource/seatunnel-datasource-plugins/datasource-jdbc-oracle/src/main/java/org/apache/seatunnel/datasource/plugin/oracle/jdbc/OracleDataSourceChannel.java [186:212]:
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
                while (resultSet.next()) {
                    TableField tableField = new TableField();
                    String columnName = resultSet.getString("COLUMN_NAME");
                    tableField.setPrimaryKey(false);
                    if (StringUtils.isNotBlank(primaryKey) && primaryKey.equals(columnName)) {
                        tableField.setPrimaryKey(true);
                    }
                    tableField.setName(columnName);
                    tableField.setType(resultSet.getString("TYPE_NAME"));
                    tableField.setComment(resultSet.getString("REMARKS"));
                    Object nullable = resultSet.getObject("IS_NULLABLE");
                    tableField.setNullable(Boolean.TRUE.toString().equals(nullable.toString()));
                    tableFields.add(tableField);
                }
            }
        } catch (ClassNotFoundException | SQLException e) {
            throw new DataSourcePluginException("get table fields failed", e);
        }
        return tableFields;
    }

    @Override
    public Map<String, List<TableField>> getTableFields(
            @NonNull String pluginName,
            @NonNull Map<String, String> requestParams,
            @NonNull String database,
            @NonNull List<String> tables) {
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -