Prathamesh9284 commented on PR #692:
URL: https://github.com/apache/wayang/pull/692#issuecomment-3921201605

   Hi @zkaoudi,
   
   I've updated the PR to handle this case. With the CSV file you shared using 
the header `id:int;name:string;email:string;country:string`, the error now 
correctly identifies the header issue:
   
   > CSV file 
'file:///Users/zoi/Work/WAYANG/wayang-examples/src/main/resources/input/customers.csv':
 header uses ';' as separator, but Calcite requires commas. Header: 
'id:int;name:string;email:string;country:string'. Expected format: 
'id:int,name:string,email:string,country:string'.
   
   It now prints the header line instead of the data line and clearly tells the 
user what to fix.


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