Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/20023#discussion_r162246729
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala ---
@@ -1048,6 +1048,16 @@ object SQLConf {
.booleanConf
.createWithDefault(true)
+ val DECIMAL_OPERATIONS_ALLOW_PREC_LOSS =
+ buildConf("spark.sql.decimalOperations.allowPrecisionLoss")
+ .internal()
+ .doc("When true (default), establishing the result type of an
arithmetic operation " +
+ "happens according to Hive behavior and SQL ANSI 2011
specification, ie. rounding the " +
+ "decimal part of the result if an exact representation is not
possible. Otherwise, NULL " +
+ "is returned in those cases, as previously.")
--- End diff --
Yeah. This is better.
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