[GitHub] [spark] cloud-fan commented on a change in pull request #25107: [SPARK-28344][SQL] detect ambiguous self-join and fail the query

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cloud-fan commented on a change in pull request #25107: [SPARK-28344][SQL] detect ambiguous self-join and fail the query
URL: https://github.com/apache/spark/pull/25107#discussion_r306624656
 
 

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 File path: sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala
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 @@ -787,6 +787,13 @@ object SQLConf {
       .booleanConf
       .createWithDefault(true)
 
+  val FAIL_AMBIGUOUS_SELF_JOIN =
+    buildConf("spark.sql.analyzer.failAmbiguousSelfJoin")
+      .doc("When true, fail the Dataset query if it contains ambiguous self-join.")
+      .internal()
+      .booleanConf
+      .createWithDefault(true)
+
   // Whether to retain group by columns or not in GroupedData.agg.
 
 Review comment:
   This is unrelated to this patch, we can fix it and other similar configs in another PR.

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