मैं वास्तव में यह बहुत कुछ करता था, इसलिए मैंने चारों ओर खोदा और इस कार्य को पाया जो मैंने कई साल पहले इस उद्देश्य के लिए लिखा था:
CREATE function [dbo].[fnSplit3](
@parameter varchar(Max) -- the string to split
, @Seperator Varchar(64) -- the string to use as a seperator
)
RETURNS @Items TABLE(
ID INT -- the element number
, item VARCHAR(8000) -- the split-out string element
, OffSet int -- the original offest
--( not entirley accurate if LEN(@Seperator) > 1 because of the Replace() )
)
AS
BEGIN
/*
"Monster" Split in SQL Server 2005; From Jeff Moden, 2008/05/22
BYoung, 2008/06/18: Modified to be a Table-Valued Function
And to handle CL/LF or LF-only line breaks
(Note: making it inline made it slower, not faster)
Test: (scripts all triggers in your database)
Select Lines.Item
From sys.sql_modules M
Join sys.objects O on O.object_id = M.object_id
cross apply dbo.fnSplit1(M.definition, char(13)+char(10)) Lines
Where O.Type = 'TR'
Order by O.create_date, Lines.ID
*/
Declare @Sep char(1)
Set @Sep = char(10) --our seperator character (convenient, doesn't affect performance)
--NOTE: we make the @Sep character LF so that we will automatically
-- parse out rogue LF-only line breaks.
--===== Add start and end seprators to the Parameter so we can handle
-- all the elements the same way
-- Also change the seperator expressions to our seperator
-- character to keep all offsets = 1
SET @Parameter = @Sep+ Replace(@Parameter,@Seperator,@Sep) [email protected]
-- This reduces run-time about 10%
;WITH cteTally AS
(--==== Create a Tally CTE from 1 to whatever the length
-- of the parameter is
SELECT TOP (LEN(@Parameter))
ROW_NUMBER() OVER (ORDER BY t1.ID) AS N
FROM Master.sys.sysColumns t1
CROSS JOIN Master.sys.sysColumns t2
)
INSERT into @Items
SELECT ROW_NUMBER() OVER (ORDER BY N) AS Number,
SUBSTRING(@Parameter, N+1, CHARINDEX(@Sep, @Parameter, N+1)-N-1) AS Value
, N+1
FROM cteTally
WHERE N < LEN(@Parameter)
AND SUBSTRING(@Parameter, N, 1) = @Sep --Notice how we find the seperator
Return
END
वहाँ अब तेज़ संस्करण हैं, लेकिन यह अभी भी लगभग 90% स्प्लिट फ़ंक्शंस की तुलना में तेज़ है जो आप यहाँ देखेंगे। यदि आप टिप्पणियों में परीक्षण का उदाहरण देखते हैं, तो यह लगभग वैसा ही है जैसा आपने पूछा था।
Select O.name, Lines.Item, Lines.ID As LineNo
From sys.sql_modules M
Join sys.objects O on O.object_id = M.object_id
cross apply dbo.fnSplit1(M.definition, char(13)+char(10)) Lines
Where O.Type = 'P'
And Lines.Item LIKE '%SEARCH_STRING%'
Order by O.name, Lines.ID