Jackie-Jiang opened a new pull request #5147: Support default star-tree URL: https://github.com/apache/incubator-pinot/pull/5147 Support generating default star-tree config with the following rules: - All dictionary-encoded single-value dimensions (including date-time columns) with cardinality smaller or equal to the threshold (10000) will be included in the split order, sorted by their cardinality in descending order - Time column (if exists and dictionary-encoded) will be appended to the split order as the last element - Use COUNT(*) and SUM for all numeric metrics as function column pairs - Use default value (10000) for max leaf records
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