maropu edited a comment on issue #27056: [SPARK-27217][SQL] Nested schema pruning with Aggregation URL: https://github.com/apache/spark/pull/27056#issuecomment-590013192 Probably, you'd be better to ask that in the spark mailing list. Anyway, we already have `SparkSessionExtensions` (or `SparkSession.experimental.extraOptimizations`) for injecting custom rules in 3rd-party projects. So, I think you can do so by using these interfaces (they are experimental interfaces though).
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