I have some built in operator in my query which can only be recognized when
CalciteConnectionProperty.FUN is set, for instance "select * from mycache where
DATEDIFF("Minute",date1,date2)> 30". The function "DATEDIFF" caused an error
"No match found for function signuature "DATEDIFF(....)" How can I enable the
"FUN" in Apache Ignite?Tao
