Tonix517 opened a new pull request #25055: [SPARK-28189] Use semanticEquals in 
Dataset drop method for attributes comparison
URL: https://github.com/apache/spark/pull/25055
 
 
   ## What changes were proposed in this pull request?
   
   In Dataset drop(col: Column) method, the `equals` comparison method was used 
instead of `semanticEquals`, which caused the problem of abnormal 
case-sensitivity behavior. When attributes of LogicalPlan are checked for 
equality, `semanticEquals` should be used instead.
   
   A similar PR I referred to: https://github.com/apache/spark/pull/22713 
created by @mgaido91 
   
   ## How was this patch tested?
   
   - Added new unit test case in DataFrameSuite
   - ./build/sbt "testOnly org.apache.spark.sql.*"
   - The python code from ticket reporter at 
https://issues.apache.org/jira/browse/SPARK-28189
   
   

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