Github user maropu commented on a diff in the pull request:
https://github.com/apache/spark/pull/21598#discussion_r196750347
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala ---
@@ -1314,6 +1314,13 @@ object SQLConf {
"Other column values can be ignored during parsing even if they are
malformed.")
.booleanConf
.createWithDefault(true)
+
+ val LEGACY_SIZE_OF_NULL = buildConf("spark.sql.legacy.sizeOfNull")
--- End diff --
`spark.sql.function.sizeOfNull` is better? btw, If major releases happen in
Spark, we can remove these kinds of options for back-compatibility? (just a
question)
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