Re: [I] Add support for from_json (JsonToStructs) expression [datafusion-comet]

["andygrove (via GitHub)" <gi...@apache.org>]

andygrove commented on issue #3203:
URL: https://github.com/apache/datafusion-comet/issues/3203#issuecomment-4802005302

   Closing as resolved. Comet now executes this expression within the native pipeline by routing it through the JVM codegen dispatcher (`spark.comet.exec.scalaUDF.codegen.enabled`, enabled by default), which Janino-compiles Spark's own code generation into a per-batch Arrow kernel. The expression no longer falls back to Spark, so a dedicated native (Rust) implementation is not required for coverage.
   
   We can revisit a native implementation in the future where there is a proven performance benefit. Please reopen or file a follow-up if you hit a correctness or performance gap with the current path.


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