pan3793 commented on code in PR #45851:
URL: https://github.com/apache/spark/pull/45851#discussion_r1549616934


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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/codegen/CodeGenerator.scala:
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@@ -1561,9 +1562,9 @@ object CodeGenerator extends Logging {
   private def logGeneratedCode(code: CodeAndComment): Unit = {
     val maxLines = SQLConf.get.loggingMaxLinesForCodegen
     if (Utils.isTesting) {
-      logError(s"\n${CodeFormatter.format(code, maxLines)}")
+      logError(log"\n${MDC(FORMATTED_CODE, CodeFormatter.format(code, 
maxLines))}")

Review Comment:
   IMO this may not be a `LogKey` case.
   
   Typically, `*_ID` stuffs are used as `LogKey` for log aggregating and 
filtering, e.g. we may want to collect the whole logs for a task. While for 
this case, the generated code is a large string block and mostly non-repeating, 
just leave it as the log content is sufficient.



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