Refresh temporary interface used in lookup

I am using temporary interface to provide a datastore for lookup.
temporary interface uses database schema for storage.
How do I refresh lookup data? I can see that the interface that uses lookup just reference to table.
Do I need to execute my temporary interface manually (or just before the main interface) to make sure my lookup is up-to-date?

Can I use In Memory Engine to store results from temporary/yellow interface?

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