fuwhu opened a new pull request #26766: [SPARK-30138][SQL]Separate 
configuration key of max iterations for analyzer and optimizer
URL: https://github.com/apache/spark/pull/26766
 
 
   ### What changes were proposed in this pull request?
   separate the configuration keys "spark.sql.optimizer.maxIterations" and 
"spark.sql.analyzer.maxIterations".
   
   ### Why are the changes needed?
   Currently, both Analyzer and Optimizer use conf 
"spark.sql.optimizer.excludedRules" to set the max iterations to run, which is 
a little confusing.
   It is clearer to add a new conf "spark.sql.analyzer.excludedRules" for 
analyzer max iterations.
   
   ### Does this PR introduce any user-facing change?
   no
   
   ### How was this patch tested?
   Existing unit tests.
   

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