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d93b2a2e9a
We need to limit the search request aggregations to whole multiples of the configured interval for both histogram and date_histogram. Otherwise, agg buckets won't overlap with the rolled up buckets and the results will be incorrect. For histogram, the validation is very simple: request must be >= the config, and modulo evenly. Dates are more tricky. - If both request and config are fixed dates, we can convert to millis and treat them just like the histo - If both are calendar, we make sure the request is >= the config with a static lookup map that ranks the calendar values relatively. All calendar units are "singles", so they are evenly divisible already - We disallow any other combination (one fixed, one calendar, etc)