deemoliu opened a new pull request, #16671:
URL: https://github.com/apache/pinot/pull/16671

   Instructions:
   This PR add uniqueNgramsMV UDFs to generate ngrams on mv columns and add 
minor refactor to uniqueNgrams
   https://github.com/apache/pinot/pull/12392
   
   How to use
   ` 
           {
             "columnName": "col_ngrams",
             "transformFunction": "uniqueNgramMV(col, 3)"
           },
           {
             "columnName": "col_1gram_2gram_3gram",
             "transformFunction": "uniqueNgramMV(col, 1, 3)"
           },
   `
   


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