[GitHub] [spark] jose-torres commented on a change in pull request #24540: [SPARK-27253][SQL][FOLLOW-UP] Add a legacy flag to restore old session init behavior.

[GitBox <gi...@apache.org>]

jose-torres commented on a change in pull request #24540: [SPARK-27253][SQL][FOLLOW-UP] Add a legacy flag to restore old session init behavior.
URL: https://github.com/apache/spark/pull/24540#discussion_r281817425
 
 

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 File path: core/src/main/scala/org/apache/spark/internal/config/package.scala
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 @@ -1309,4 +1309,10 @@ package object config {
     .bytesConf(ByteUnit.BYTE)
     .createOptional
 
+  private[spark] val LEGACY_SESSION_INIT_WITH_DEFAULTS =
+    ConfigBuilder("spark.legacy.sessionInitWithConfigDefaults")
+      .doc("Flag to revert to legacy behavior where a cloned SparkSession receives SparkConf " +
+        "defaults, dropping any overrides in its parent SparkSession.")
+      .booleanConf
+      .createWithDefault(false)
 
 Review comment:
   Moved and renamed.

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