dongjoon-hyun opened a new pull request #27184: 
[SPARK-28152][SQL][FOLLOWUP][2.4] Add a legacy conf for old MsSqlServerDialect 
numeric mapping
URL: https://github.com/apache/spark/pull/27184
 
 
   ### What changes were proposed in this pull request?
   
   This is a follow-up for https://github.com/apache/spark/pull/25248 .
   
   ### Why are the changes needed?
   
   The new behavior cannot access the existing table which is created by old 
behavior.
   This PR provides a way to avoid new behavior for the existing users.
   
   ### Does this PR introduce any user-facing change?
   
   Yes. This will fix the broken behavior on the existing tables.
   
   ### How was this patch tested?
   
   Pass the Jenkins and JDBC integration test.

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