zhztheplayer commented on code in PR #10183:
URL: 
https://github.com/apache/incubator-gluten/pull/10183#discussion_r2206223011


##########
gluten-substrait/src/main/scala/org/apache/spark/sql/execution/datasources/GlutenWriterColumnarRules.scala:
##########
@@ -127,6 +127,8 @@ object GlutenWriterColumnarRules {
     if (format.isDefined) {
       spark.sparkContext.setLocalProperty("isNativeApplicable", true.toString)
       spark.sparkContext.setLocalProperty("nativeFormat", format.get)
+      // The flag for static-only write is not used by Velox backend where
+      // the static partition write is already supported.
       spark.sparkContext.setLocalProperty(
         "staticPartitionWriteOnly",

Review Comment:
   Sounds reasonable. I didn't remove it in this PR because I found some usages 
in CH. But not sure whether they are actually using it. So it is kept here at 
the moment.



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