viirya opened a new pull request #24771: [SPARK-27873][SQL][BRANCH-2.4] 
columnNameOfCorruptRecord should not be checked with column names in CSV header 
when disabling enforceSchema
URL: https://github.com/apache/spark/pull/24771
 
 
   ## What changes were proposed in this pull request?
   
   If we want to keep corrupt record when reading CSV, we provide a new column 
into the schema, that is `columnNameOfCorruptRecord`. But this new column isn't 
actually a column in CSV header. So if `enforceSchema` is disabled, 
`CSVHeaderChecker` throws a exception complaining that number of column in CSV 
header isn't equal to that in the schema.
   
   This backports the fix into branch-2.4.
   
   ## How was this patch tested?
   
   Added test.

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