Method sql2ddf

core/src/main/java/io/ddf/content/ViewHandler.java:168–177

(String sqlCommand, String errorMessage)

  // ///// Execute SQL command on the DDF ///////

  private DDF sql2ddf(String sqlCommand, String errorMessage) throws DDFException {
    try {
      return this.getManager().sql2ddf(String.format(sqlCommand, "{1}"),
          new SQLDataSourceDescriptor(sqlCommand, null, null, null, this
              .getDDF().getUUID().toString()));

    } catch (Exception e) {
      throw new DDFException(String.format(errorMessage, this.getDDF().getTableName()), e);
    }
  }

  @Override
  public DDF subset(List<Column> columnExpr, Expression filter) throws DDFException {