b-pradeeprao opened a new pull request #636: SOLR-10409 - Added support for 
rows=x in /export to limit number of docs exported (With unit tests)
URL: https://github.com/apache/lucene-solr/pull/636
 
 
   This lets user add rows=x  parameter to request to limit number of docs they 
get from /export query
   
   rows=x
   {
   x=0 => returns numFound=0 and no docs in results - this is existing behavior 
(I guess, unintended)
   x=undefined or x>=numFound => will not have any effect on existing behavior 
   x < numFound => will return first x docs only (in specified sorted order ) 
in results.
   }
   
   Note Reg. Unit Testing.
   Given **DOCUMENT_BATCH_SIZE = 30000;** in **ExportWriter.java:87** , ideal 
testing should be done on index with >30k docs. I have tested all edge cases 
with the batch_sizes to 100 and 1.

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