[GitHub] [spark] HyukjinKwon commented on a diff in pull request #40270: [SPARK-42662][CONNECT][PYTHON][PS] Support `withSequenceColumn` as PySpark DataFrame internal function.

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

HyukjinKwon commented on code in PR #40270:
URL: https://github.com/apache/spark/pull/40270#discussion_r1125475157


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connector/connect/common/src/main/protobuf/spark/connect/relations.proto:
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@@ -781,3 +782,10 @@ message FrameMap {
   CommonInlineUserDefinedFunction func = 2;
 }
 
+message WithSequenceColumn {

Review Comment:
   Yeah, the reason is that it requires to run a plan-wise operation `RDD.zipWithIndex`



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