marin-ma commented on code in PR #4952:
URL: https://github.com/apache/incubator-gluten/pull/4952#discussion_r1530582237


##########
backends-clickhouse/src/main/scala/io/glutenproject/backendsapi/clickhouse/CHSparkPlanExecApi.scala:
##########
@@ -750,4 +750,8 @@ class CHSparkPlanExecApi extends SparkPlanExecApi {
   ): GenerateExecTransformerBase = {
     CHGenerateExecTransformer(generator, requiredChildOutput, outer, 
generatorOutput, child)
   }
+
+  override def genPreProjectForGenerate(generate: GenerateExec): SparkPlan = 
generate

Review Comment:
   So far, CH doesn't need pre/post project for their already supported 
generator type. But not sure if it would be needed in the future with more 
`Generator` supported.



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