Jackie-Jiang opened a new pull request #5115: Refactor the data source to include all information needed for query execution URL: https://github.com/apache/incubator-pinot/pull/5115 Currently query execution engine uses metadata from both data source and column metadata to process the segment. It works fine for immutable segment, but for mutable segment (real-time consuming segment), column metadata does not exist, thus multiple features such as segment pruning cannot be applied to the mutable segment. This PR adds the missing metadata from column metadata into the data source so that they become accessible for mutable segment, e.g. min/max value, partition info. Next PR will switch the engine to work purely on data source.
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