dongjoon-hyun commented on code in PR #41202:
URL: https://github.com/apache/spark/pull/41202#discussion_r1196848013
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/subquery.scala:
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@@ -372,7 +372,8 @@ case class ListQuery(
// ListQuery can't be executed alone so its nullability is not defined.
// Consider using ListQuery.childOutputs.exists(_.nullable)
if (!SQLConf.get.getConf(SQLConf.LEGACY_IN_SUBQUERY_NULLABILITY)) {
- assert(false, "ListQuery nullability is not defined")
+ assert(false, "ListQuery nullability is not defined. This assert can be
disabled using " +
+ "conf spark.sql.legacy.inSubqueryNullability = true")
Review Comment:
Instead of a hard-coded string, we use
`SQLConf.LEGACY_IN_SUBQUERY_NULLABILITY.key`.
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