cloud-fan commented on code in PR #37525:
URL: https://github.com/apache/spark/pull/37525#discussion_r1090102386
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sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala:
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@@ -435,6 +435,15 @@ object SQLConf {
.booleanConf
.createWithDefault(true)
+ val EXPRESSION_PROJECTION_CANDIDATE_LIMIT =
+ buildConf("spark.sql.optimizer.expressionProjectionCandidateLimit")
+ .doc("The maximum number of the candidate of out put expressions whose
alias are replaced." +
+ " It can preserve the output partitioning and ordering." +
+ " Negative value means disable this optimization.")
+ .version("3.4.0")
+ .intConf
Review Comment:
let's make it an internal conf. Ideally users shouldn't tune it.
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