Leon-WTF opened a new pull request #2227:
URL: https://github.com/apache/drill/pull/2227


   # [DRILL-7928](https://issues.apache.org/jira/browse/DRILL-7928): Add fourth 
parameter for split_part udf
   
   ## Description
   Add the fourth parameter in split_part udf as end index: suport 
split_part('a,b,c,d', ',' , 1, 2) = 'a,b'
   Return all remaining string if end indx is greater then splitted string 
length
   
   ## Documentation
   string split_part(string input, string delimiter, bigint start, bigint end)
   
   ## Testing
   New test added in 
org.apache.drill.exec.expr.fn.impl.TestStringFunctions.testSplitPartStartEnd


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