Load (/ store?) from (/ into?) persistent storages

[laysakura]

Is your feature request related to a problem? Please describe.

Describe the solution you'd like

Not yet fully considered.

Will check Streams and Tables section in "Streaming Systems" book.

Describe alternatives you've considered

Additional context

A vehicle can save driving log data in a persistent storage to keep them after drivers turn off the power (IG-OFF).
The size of the log data can reach to the order of 10GB.

In-car software developers may want SpringQL to load (even store?) such log data from the persistent storage and deal with part of them in the mein memory.

I don't want to force developers to store log data in SpringQL's unique format because they may want to avoid lock-in.

Transparent data loader in some format might be good solution.