Split a String into fixed length parts in SQL Server 2008 - sql-server-2008

Question

I am working with Split string method, I have done with splitting a string into fixed length chunks, but the issue is, it breaks the word , I want to keep intact the word and on the base of "SPACE" character ,Split down.
Below I am attaching the Function with test result as well.
Kindly guide or instruct me how to work with.
/*
Select dbo.SplitFixedLengthString('This is me , I am going to split this string in such a way that it will not break any word, rather it keeps word',16)
*/
CREATE FUNCTION [dbo].[SplitFixedLengthString]
(
#string NVARCHAR(MAX) ,
#stringlength INT
)
RETURNS NVARCHAR(MAX)
AS
BEGIN
DECLARE #tempStr NVARCHAR(MAX)
DECLARE #finalString NVARCHAR(MAX)
IF LEN(#string) > 0
AND #stringlength > 0
BEGIN
SELECT #tempStr = ''
DECLARE #i INT
SET #i = 1
WHILE #i <= LEN(#string)
BEGIN
SELECT #tempStr = #tempStr + SUBSTRING(#string, #i,#stringlength) + (CHAR(13) + CHAR(10))
SET #i = #i + #stringlength
END
END
RETURN #tempStr
END
Test Result:
This is me , I a
m going to split
this string in
such a way that
it will not brea
k any word, rath
er it keeps word
(1 row(s) affected)
As we can see the line one of output is splitting the word "am" like wise the line 4,5.
suggest me solution please.
Here are my efforts:
--DECLARE #x VARCHAR(32) = 'xyzxyzyyythgetdghydgsh j';
--SELECT LEN(#x) - CHARINDEX(' ', REVERSE(#x)) + 1;
DECLARE #string NVARCHAR(MAX)
SELECT #string = 'This is me , I am going to split this string in such a way that it will not break any word, rather it keeps word'
--SELECT #string = 'This is me,I am going to Trim off things in such a way that it will add newline having '
DECLARE #stringlength INT
SELECT #stringlength = 11
BEGIN
DECLARE #tempStr NVARCHAR(MAX)
DECLARE #finalString NVARCHAR(MAX) = ''
IF LEN(#string) > 0
AND #stringlength > 0
BEGIN
SELECT #tempStr = ''
DECLARE #start_index INT = 1
DECLARE #last_index INT = 0
DECLARE #lastindex INT = LEN(#string)-1
WHILE #start_index < #lastindex
BEGIN
SELECT #tempStr = SUBSTRING(#string, #start_index,#stringlength )
IF RIGHT(#tempStr,1) = ' '
BEGIN
SET #finalString = #finalString + #tempStr + (CHAR(13) + CHAR(10))
SET #start_index = #start_index + #stringlength
END
ELSE
BEGIN
--SELECT #last_index = LEN(#tempStr) - CHARINDEX(' ', REVERSE(#tempStr)) + 1;
SELECT #last_index = LEN(#tempStr) - CHARINDEX(' ',REVERSE(#tempStr))
IF #last_index = 0
BEGIN
SET #finalString = #finalString + LTRIM(SUBSTRING(#tempStr, 1,LEN(#tempStr)+1))+ (CHAR(13) + CHAR(10))
SET #start_index = #start_index + LEN(#tempStr)
END
ELSE
BEGIN
SET #finalString = #finalString + LTRIM(SUBSTRING(#tempStr, 1,#last_index +1))+ (CHAR(13) + CHAR(10))
SET #start_index = #start_index + #last_index
END
END
IF #start_index + #stringlength >= #lastindex
BEGIN
SET #finalString = #finalString + LTRIM(SUBSTRING(#string, #start_index,(#lastindex - #start_index)+1))+ (CHAR(13) + CHAR(10))
SET #start_index = #start_index + (#lastindex - #start_index)
END
END
END
SELECT #finalString
END
Here is the output
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
This is me
, I am
going to
split
this
string in
such a way
that it
will not
break any
word,
rather it
keeps wor
(1 row(s) affected)

Answer 1

After a little effort I have written this code. and its working fine, although a bit tricky task.
ALTER FUNCTION [dbo].[SplitFixedLengthString]
(
#string NVARCHAR(MAX) ,
#stringlength INT
)
RETURNS NVARCHAR(MAX)
AS
BEGIN
DECLARE #tempStr NVARCHAR(MAX)
DECLARE #finalString NVARCHAR(MAX) = ''
IF LEN(#string) > 0
AND #stringlength > 0
BEGIN
SELECT #tempStr = ''
DECLARE #start_index INT = 1
DECLARE #last_index INT = 0
DECLARE #lastindex INT = LEN(#string)
DECLARE #NextChar VARCHAR(1) = ''
WHILE #start_index < #lastindex
BEGIN
SELECT #tempStr = SUBSTRING(#string, #start_index,#stringlength )
IF RIGHT(#tempStr,1) = ' '
BEGIN
SET #finalString = #finalString + #tempStr + (CHAR(13) + CHAR(10))
SET #start_index = #start_index + #stringlength
END
ELSE
BEGIN
SELECT #last_index = LEN(#tempStr) - CHARINDEX(' ',REVERSE(#tempStr))
SET #NextChar = SUBSTRING(#string, #start_index +LEN(#tempStr),1)
IF #last_index = 0 AND #NextChar = ' '
BEGIN
SET #finalString = #finalString + LTRIM(SUBSTRING(#tempStr, 1,LEN(#tempStr)-1))+(CHAR(13) )
SET #start_index = #start_index + LEN(#tempStr)
END
IF #last_index = 0 AND #NextChar <> ' '
BEGIN
SET #finalString = #finalString + LTRIM(SUBSTRING(#tempStr, 1,LEN(#tempStr)-1))+ '_'+ (CHAR(13) )
SET #start_index = #start_index + LEN(#tempStr) -1
END
ELSE IF (#last_index) = LEN(#tempStr)
BEGIN
SET #finalString = #finalString + LTRIM(SUBSTRING(#tempStr, 1,LEN(#tempStr)-1))+ '_'+ (CHAR(13) )
SET #start_index = #start_index + LEN(#tempStr) -1
END
ELSE IF #last_index <> 0 AND #NextChar = ' '
BEGIN
SET #finalString = #finalString + LTRIM(SUBSTRING(#tempStr, 1,LEN(#tempStr)))+ (CHAR(13) )
SET #start_index = #start_index + LEN(#tempStr)
END
ELSE IF (LEN(#tempStr) - #last_index) = 2 AND #NextChar <> ' '
BEGIN
SET #finalString = #finalString + LTRIM(SUBSTRING(#tempStr, 1,LEN(#tempStr)-1))+ (CHAR(13) )
SET #start_index = #start_index + LEN(#tempStr) -1
END
ELSE IF (#last_index) <> 0 AND #NextChar <> ' '
BEGIN
SET #finalString = #finalString + LTRIM(SUBSTRING(#tempStr, 1,LEN(#tempStr)-1))+ '_'+ (CHAR(13) )
SET #start_index = #start_index + LEN(#tempStr) -1
END
ELSE
BEGIN
SET #finalString = #finalString + LTRIM(SUBSTRING(#tempStr, 1,#last_index ))+ (CHAR(13) )
SET #start_index = #start_index + #last_index
END
END
IF #start_index + #stringlength >= #lastindex
BEGIN
SET #finalString = #finalString + LTRIM(SUBSTRING(#string, #start_index,(#lastindex - #start_index)+1))+ (CHAR(13) )
SET #start_index = #start_index + (#lastindex - #start_index)
END
END
END
RETURN #finalString
END