add continuous aggregate refresh policies

[yuenmichelle1]

https://docs.timescale.com/api/latest/continuous-aggregates/add_continuous_aggregate_policy/

Starting_offset is 3 days which is smallest possible. If set to anything smaller, will get a refresh window too small error.
end_offset looks back to the past hour from when the refresh policy job runs.
Scheduling_interval is 1 day (so refresh policies will run daily)

For all continuous aggregates, all refresh policies are set to look back to the past 3 days through the past hour of when the refresh job is done to see if there are any changes, and will update the continuous aggregate. This job will be run daily.

[zwolf]

all refresh policies are set to look back to the past 3 days through the past hour of when the refresh job is done to see if there are any changes

I don't think I quite understand this, could you reword? And I think it might be worth putting the the explanation in the migration as a comment so that there's some immediate context in the repo w/o having to trace it back.

[yuenmichelle1]

all refresh policies are set to look back to the past 3 days through the past hour of when the refresh job is done to see if there are any changes

I don't think I quite understand this, could you reword? And I think it might be worth putting the the explanation in the migration as a comment so that there's some immediate context in the repo w/o having to trace it back.

english is so hard.
All the refresh policies for the continuous aggregates that I have created will look back the past 3 days when refresh job is run. (Mainly because a 3 day lookback is the smallest window I can set for refresh policies).

As an example:

Refresh Continuous Aggregate Job is run today Nov 6th 1:47PM CST, the job will look at the classification_events table for the past 3 days (Nov 3rd) through the past hour (Nov 6th 12:47 PM CST), and will check for any changes in the classification_events table that have NOT been calculated in previous refresh jobs and then update the caggs with updated calculations.