szehon-ho commented on code in PR #49840:
URL: https://github.com/apache/spark/pull/49840#discussion_r1945608585


##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/ResolveDefaultColumnsUtil.scala:
##########
@@ -52,6 +52,17 @@ object ResolveDefaultColumns extends QueryErrorsBase
   // CURRENT_DEFAULT_COLUMN_METADATA.
   val CURRENT_DEFAULT_COLUMN_NAME = "DEFAULT"
 
+  var defaultColumnAnalyzer: Analyzer = DefaultColumnAnalyzer
+  var defaultColumnOptimizer: Optimizer = DefaultColumnOptimizer
+
+  /**
+   * Visible for testing
+   */
+  def setAnalyzerAndOptimizer(analyzer: Analyzer, optimizer: Optimizer): Unit 
= {

Review Comment:
   Its hard to reproduce the issue in unit test, so I end up mocking these 
members to verify that the catalogs are not called.
   
   let me know, Im totally fine with removing this.



##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/ResolveDefaultColumnsUtil.scala:
##########
@@ -52,6 +52,17 @@ object ResolveDefaultColumns extends QueryErrorsBase
   // CURRENT_DEFAULT_COLUMN_METADATA.
   val CURRENT_DEFAULT_COLUMN_NAME = "DEFAULT"
 
+  var defaultColumnAnalyzer: Analyzer = DefaultColumnAnalyzer
+  var defaultColumnOptimizer: Optimizer = DefaultColumnOptimizer
+
+  /**
+   * Visible for testing
+   */
+  def setAnalyzerAndOptimizer(analyzer: Analyzer, optimizer: Optimizer): Unit 
= {

Review Comment:
   Its hard to reproduce the issue in unit test, so I end up mocking these 
members to verify that the catalogs are not called.
   
   let me know, Im totally fine with removing this if we think existing test 
coverage is ok.



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