In previous versions of ES, fields stats were used internally by ES to determine which indexes to use when searching. A typical example for timeseries indexes would be to search on a time range, internal field stats would be used to not even attempt searching on indexes for which the time range did not match. The field stats API is gone in more recent versions of ES. Two questions:
*) Does ES still do a smart selection of indexes to avoid touching ES on time range queries based on field statistics for each index?
*) If I want to have access to those per index field stats, is there any way to do it in 5.6.X and 6.X?