Query Folding Improvements

Based on the community's findings we'd welcome a second look at the following Power Query functions vs the equivalent SQL server functionality for improvements to Query Folding. These changes would enable faster dataset refreshes where applicable and improve the overall experience of using Power Query against relational data sources. Name----------------------------------Supports Folding--------SQL Character.FromNumber------------FALSE---------------------CHAR Text.PositionOf------------------------FALSE--------------------CHARINDEX Date.AddDays-------------------------FALSE---------------------DATEADD Date.AddQuarters--------------------FALSE---------------------DATEADD Date.AddWeeks-----------------------FALSE---------------------DATEADD Date.DayOfWeekName-------------FALSE---------------------DATENAME Date.EndOfMonth--------------------FALSE---------------------EOMONTH Text.At-----------------------------------FALSE---------------------SUBSTRING Text.Start-------------------------------FALSE---------------------LEFT Text.Replace--------------------------FALSE---------------------REPLACE Text.Repeat----------------------------FALSE---------------------REPLICATE Text.Reverse--------------------------FALSE---------------------REVERSE Text.End--------------------------------FALSE---------------------RIGHT Text.ReplaceRange-----------------FALSE---------------------STUFF Text.Range----------------------------FALSE---------------------SUBSTRING