Korrekt skiftläge/titel i en kolumn med undantagstabell i SQL Server

Skapa en tabell (jag använder TITLE_CASE_EXCEPTION som mitt exempel) med en kolumn EXCEPTIONDå är det datadrivet därifrån.

    IF EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[GUI].[fn_TITLE_CASE]') AND type in (N'FN', N'IF', N'TF', N'FS', N'FT'))
        DROP FUNCTION [GUI].[fn_TITLE_CASE]
    GO

    CREATE FUNCTION [GUI].[fn_TITLE_CASE] 
        (
        @STRING VARCHAR(MAX)
        )
    RETURNS VARCHAR(MAX)
    AS
    BEGIN
        SET QUOTED_IDENTIFIER OFF

        DECLARE @RESET BIT
        DECLARE @_OUT_STRING VARCHAR(MAX)
        DECLARE @I INT
        DECLARE @C CHAR(1)

        DECLARE @CASE_LEN INT = 0
        DECLARE @CASE_EXCEPTIONS VARCHAR(MAX) = ''
        DECLARE @CASE_VALUE VARCHAR(MAX) = ''

        IF @STRING IS NULL
            RETURN NULL
        IF @STRING = ''
            RETURN @STRING

        SELECT @STRING = LOWER(RTRIM(@STRING)), @RESET = 1, @I = 1, @_OUT_STRING = ''

        WHILE (@I <= LEN(@STRING))
        SELECT 
            @C = SUBSTRING(@STRING, @I, 1),
            @_OUT_STRING = @_OUT_STRING + CASE WHEN @RESET = 1 THEN UPPER(@C) ELSE @C END,
            @RESET = CASE WHEN @C LIKE '[a-zA-Z'']' THEN 0 ELSE 1 END,
            @I = @I + 1

        SELECT @I = 0, @_OUT_STRING = @_OUT_STRING + ' '
        SELECT @CASE_EXCEPTIONS = @CASE_EXCEPTIONS + RTRIM(EXCEPTION) + ',' FROM [LOOKUP].TITLE_CASE_EXCEPTION

        WHILE CHARINDEX(',', @CASE_EXCEPTIONS, @I + 1) > 0 
            BEGIN 
            -- get the delimited word 
            SET @CASE_LEN = CHARINDEX(',', @CASE_EXCEPTIONS, @I + 1) - @I
            SET @CASE_VALUE = SUBSTRING(@CASE_EXCEPTIONS, @I, @CASE_LEN) 

            -- replace it in the original text 
            SET @_OUT_STRING = REPLACE(@_OUT_STRING, ' ' + @CASE_VALUE + ' ', ' ' + @CASE_VALUE + ' ') 

            -- get position of next word 
            SET @I = CHARINDEX(',', @CASE_EXCEPTIONS, @I + @CASE_LEN) + 1 
            END

        RETURN RTRIM(@_OUT_STRING)
    END
    GO