gengliangwang commented on code in PR #43781:
URL: https://github.com/apache/spark/pull/43781#discussion_r1393339460
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sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala:
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@@ -4541,6 +4541,15 @@ object SQLConf {
.booleanConf
.createWithDefault(false)
+ val LEGACY_RETAIN_FRACTION_DIGITS_FIRST =
+
buildConf("spark.sql.legacy.decimalLeastCommonType.retainFractionDigitsFirst")
Review Comment:
TBH the conf is a bit long.
How about `spark.sql.legacy.decimal.retainFractionDigitsOnTruncate`. But the
naming really depends on the scrope of the behavior change as I asked in
https://github.com/apache/spark/pull/43781/files#r1393331222
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