sets

The Set-Concept

RSS is designed especially for the handling of mass data. The RSS-D-applications partly handle and visualize huge amounts of data respectively.
To avoid excessive latencies and system load, in RSS-D only selected and sorted data access to the respective database table can be executed, according to corresponding indices, that had been defined for the table.
These indices are defined specifically per database table, depending on quantity of data and optimization-strategy, thus not each column is indicated, in order not to slow down the storing of data unnecessarily, on the other hand.
In doing so maximum comfort is provided to the user.

Step 1:

Firstly you define a macro, a sequence of steps, each selecting an amount of data.
In doing so each step may be linked to the result of the preceding steps by different operators.

Thus you may assemble your data selection in as many steps as desired in advance, which will be converted by RSS-D in appropriate SQL-commands.
In this manner every user may define several macros for different working operations.

It is possible to execute the macro in parts, to avoid unnecessary latencies here also:

Step 2 (button execute SQL):

Every step of the macro is executed on the database.
The result will not be returned directly, but buffered in a way that guarantees optimal speed for later access.

Step 3 (button fetch Set):

The selected records are transferred with highest possible speed based on the buffered provisional result.

If primarily contents of the records change, it will be sufficient just to perform step 3, to receive the newest contents.
Only when you anticipate that new (and relevant) records might have been added, both steps (2 and 3) should be executed for a complete updating.