Working with Subdata Tables

As mentioned earlier, another method of presenting hierarchical data is to use a subdata table beneath a Data Table Column or More Info Row element, see Data Table Rows. We don't generally recommend this approach, although the necessary elements remain in Logi Info for backward compatibility.

Subdata tables receive data from the Subdata Layer element, which uses a standard datalayer to retrieve data and then relates its columns to those of the parent data table's datalayer.

Most developers find it easier to use a subreport that includes a regular data table, rather than a subdata table. One advantage to this approach is that a subreport, which is a separate report definition, can be independently developed and tested, and then embedded in a parent report using the SubReport element. This technique works well with the More Info Row element and does not require hierarchical data. More information is available in SubReports.

The example definition shown above employs two More Info Row elements and two Subdata Table elements to create a hierarchy of data from the previous examples. In this case, the detail data may not always be visible in the report and may require the user to do some clicking to make it visible.

For information about using subdata tables, see Subdata Tables.