wangxiaobaidu11 opened a new issue #11837:
URL: https://github.com/apache/druid/issues/11837


   ### Description
   1.Accurate count distinct for numerical columns.
   2.Use hive global dictionary to convert columns of characters that need to 
be evaluated accurately to numeric values.
   
   ### Motivation
   1. Support long type, breaking the limit of 2 billion.
   2. Accurate count distinct returns results at subsecond levels.
   


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