convert sql to mysql

Question

CREATE FUNCTION [dbo].[Split]

(

      @RowData nvarchar(max),

      @SplitOn nvarchar(5)

)

RETURNS @RtnValue table

(

      Id int identity(1,1),

      Data nvarchar(max)

)

AS

BEGIN

      Declare @Cnt int

      Set @Cnt = 1

 

      While (Charindex(@SplitOn,@RowData)>0)

      Begin

            Insert Into @RtnValue (data)

            Select

                  Data = ltrim(rtrim(Substring(@RowData,1,Charindex(@SplitOn,@RowData)-1)))

 

            Set @RowData = Substring(@RowData,Charindex(@SplitOn,@RowData)+1,len(@RowData))

            Set @Cnt = @Cnt + 1

      End

    

      Insert Into @RtnValue (data)

      Select Data = ltrim(rtrim(@RowData))

 

      Return

END

///
This function how to write in mysql.....
help me plz....
reply me quick.....................