Insert historical data into continuous aggregate

Hi everybody,

Is there any way to insert historical data into continuous aggregate?

I have two separate problems that such inserting can solve:

1. I have per-day summation create materialized view data_1day ... as select time_bucket('1 day', ts), sum(value). But now I also have some historical data. I can push them into separate table data_1day_extra and select union out of it and data_1day. But it looks a bit hacky.
2. I need to add more columns to continuous aggregate. From another topic (Unified view across more continuous aggregates) I understood that the only way is to recreate the whole aggregate. But I need to keep and extend data from the old one, because raw data is long gone.

Thanks!

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