AngersZhuuuu edited a comment on issue #25071: [SPARK-28292][SQL] Enable inject user-defined Hint URL: https://github.com/apache/spark/pull/25071#issuecomment-510289811 > @AngersZhuuuu . The regression test is used to protect your patch. Without that, your contribution can be disabled accidentally in the future. :) > > > By the way , this pr has been used well in our prod I know it,。 I'm not familiar with the unit tests about spark, so sometimes it takes time to find the right place and way to write unit tests。I am learning how to write good unit tests for these。 Thank you very much for your guidance
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