[GitHub] [incubator-doris] EmmyMiao87 commented on issue #2002: Coalesce function match error in tpcds

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EmmyMiao87 commented on issue #2002: Coalesce function match error in tpcds 
URL: https://github.com/apache/incubator-doris/issues/2002#issuecomment-543088120
 
 
   The reason is that the function coalesce(varchar, varchar) match the function of coalesce(decimal, int) in doris.
   For the IS_SUPERTYPE_OF of compare mode, it will find the match function from front to back. In function declaration, the coalesce(varchar, varchar) in front of the coalesce(decimal, decimal). 
   The priority of coalesce function in IS_SUPERTYPE_OF compare mode is incorrect. So the outer layer function(sum) could not handle the varchar of input param.

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