klsince opened a new pull request #7925:
URL: https://github.com/apache/pinot/pull/7925


   ## Description
   Add helper methods to check if a segment needs reprocessing by comparing its 
metadata with the table config and schema.
   
   Right now, the checking and reprocessing logic are mixed together in 
ImmutableSegmentLoader.load() method. The helper methods added here will allow 
us to check consistency before conducting any real reprocessing that can be 
heavy. For example, when a segment doesn't need reprocessing, we can save all 
the upfront cost of preparing the data for reprocessing, like downloading some 
data from remote tier backend.
   
   This PR hasn't changed the existing control flow yet. The next one will. 
   
   
   ## Upgrade Notes
   Does this PR prevent a zero down-time upgrade? (Assume upgrade order: 
Controller, Broker, Server, Minion)
   * [ ] Yes (Please label as **<code>backward-incompat</code>**, and complete 
the section below on Release Notes)
   
   Does this PR fix a zero-downtime upgrade introduced earlier?
   * [ ] Yes (Please label this as **<code>backward-incompat</code>**, and 
complete the section below on Release Notes)
   
   Does this PR otherwise need attention when creating release notes? Things to 
consider:
   - New configuration options
   - Deprecation of configurations
   - Signature changes to public methods/interfaces
   - New plugins added or old plugins removed
   * [ ] Yes (Please label this PR as **<code>release-notes</code>** and 
complete the section on Release Notes)
   ## Release Notes
   <!-- If you have tagged this as either backward-incompat or release-notes,
   you MUST add text here that you would like to see appear in release notes of 
the
   next release. -->
   
   <!-- If you have a series of commits adding or enabling a feature, then
   add this section only in final commit that marks the feature completed.
   Refer to earlier release notes to see examples of text.
   -->
   ## Documentation
   <!-- If you have introduced a new feature or configuration, please add it to 
the documentation as well.
   See 
https://docs.pinot.apache.org/developers/developers-and-contributors/update-document
   -->
   


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