code: private String toCase(String targetColumnName) {
      String columnName = targetColumnName;
      ColumnNameCase caseType = ColumnNameCase.valueOf(this.workUnitState
          .getProp(ConfigurationKeys.SOURCE_COLUMN_NAME_CASE, ConfigurationKeys.DEFAULT_COLUMN_NAME_CASE).toUpperCase());
      switch (caseType) {
        case TOUPPER:
          columnName = targetColumnName.toUpperCase();
          break;
        case TOLOWER:
          columnName = targetColumnName.toLowerCase();
          break;
        default:
          columnName = targetColumnName;
          break;
      }
      return columnName;
    }
docs: Change the column name case to upper, lower or nochange; Default nochange
  
  @return column name with the required case