My guess is that doing an array read should be built into RSSQL. The "What is the quickest way" part of that question throws me off a bit - like "What's the easiest way to raise a baby" or "quickest way to design a new microprocessor"...humm...the focus feels a little off.
I'd consider the following questions:
1. What are you going to do with the data? Do you expect to update a copy to view, save snapshots, edit the data, write it back to the PLC?
2. What triggers the transaction - periodically, PLC register goes high, user input from an HMI.
3. What's the goal here - Unless it's a regulatory data dump you probably have to get more specific.