Add udf_PatReplace8K function and fix udf_PatExclude8K for CS instance

Author: ktaranov

User_Defined_Function/udf_PatExclude8K.sql

@@ -56,7 +56,7 @@ WITH E1(N) AS (
 SELECT N
 FROM (VALUES (NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL),(NULL)) AS X(N)
 ),
-itally(N) AS
+iTally(N) AS
 (
   SELECT TOP(CONVERT(INT,LEN(@String),0)) ROW_NUMBER() OVER (ORDER BY (SELECT NULL))
   FROM E1 T1 CROSS JOIN E1 T2 CROSS JOIN E1 T3 CROSS JOIN E1 T4

User_Defined_Function/udf_PatReplace8K.sql

@@ -0,0 +1,87 @@
+IF OBJECT_ID('dbo.udf_PatReplace8K', 'IF') IS NULL
+EXECUTE ('CREATE FUNCTION dbo.udf_PatReplace8K() RETURNS TABLE WITH SCHEMABINDING AS RETURN SELECT 1 AS A;');
+GO
+
+
+ALTER FUNCTION dbo.udf_PatReplace8K
+(
+  @string  varchar(8000),
+  @pattern varchar(50),
+  @replace varchar(1)
+) 
+/*****************************************************************************************
+Purpose:
+ Given a string (@string), a pattern (@pattern), and a replacement character (@replace)
+ udf_PatReplace8K will replace any character in @string that matches the @pattern parameter 
+ with the character, @replace.
+
+Usage:
+--===== Basic Syntax Example
+ SELECT pr.NewString
+ FROM dbo.udf_PatReplace8K(@string, @pattern, @replace);
+
+--===== Replace numeric characters with a "*"
+ SELECT pr.NewString
+ FROM dbo.udf_PatReplace8K('My phone number is 555-2211','[0-9]','*') pr;
+
+--==== Using againsts a table
+ DECLARE @table TABLE(OldString varchar(40));
+ INSERT @table VALUES 
+ ('Call me at 555-222-6666'),
+ ('phone number: (312)555-2323'),
+ ('He can be reached at 444.665.4466');
+ SELECT t.OldString, pr.NewString
+ FROM @table t
+ CROSS APPLY dbo.udf_PatReplace8K(t.OldString,'[0-9]','*') pr;
+
+ Programmer Notes:
+ 1. Required SQL Server 2008+
+ 2. @pattern IS case sensitive but can be easily modified to make it case insensitive
+ 3. There is no need to include the "%" before and/or after your pattern since since we 
+    are evaluating each character individually
+ 4. Certain special characters, such as "$" and "%" need to be escaped with a "/"
+    like so: [/$/%]
+
+Revision History:
+ Rev 00 - 10/27/2014 Initial Development - Alan Burstein
+
+ Rev 01 - 10/29/2014 Mar 2007 - Alan Burstein
+        - Redesigned based on the dbo.STRIP_NUM_EE by Eirikur Eiriksson
+          (see: http://www.sqlservercentral.com/Forums/Topic1585850-391-2.aspx)
+        - change how the cte tally table is created 
+        - put the include/exclude logic in a CASE statement instead of a WHERE clause
+        - Added Latin1_General_BIN Colation
+        - Add code to use the pattern as a parameter.
+
+ Rev 02 - 20141106
+        - Added final performane enhancement (more cudo's to Eirikur Eiriksson)
+        - Put 0 = PATINDEX filter logic into the WHERE clause
+
+Rev 03  - 20150516
+        - Updated to deal with special XML characters
+
+Rev 04  - 20170320
+        - changed @replace from char(1) to varchar(1) to address how spaces are handled
+*****************************************************************************************/
+RETURNS TABLE WITH SCHEMABINDING
+AS
+RETURN
+WITH
+E1(N) AS (SELECT N FROM (VALUES (1),(1),(1),(1),(1),(1),(1),(1),(1),(1)) AS E1(N)),
+iTally(N) AS 
+(
+  SELECT TOP (LEN(@string)) CHECKSUM(ROW_NUMBER() OVER (ORDER BY (SELECT NULL))) 
+  FROM E1 a,E1 b,E1 c,E1 d
+)
+SELECT NewString =
+((
+  SELECT
+    CASE 
+      WHEN PATINDEX(@pattern,SUBSTRING(@string COLLATE Latin1_General_BIN,N,1)) = 0
+      THEN SUBSTRING(@string,N,1)
+      ELSE @replace
+    END
+  FROM iTally
+  FOR XML PATH(''), TYPE
+).value('.[1]','varchar(8000)'));
+GO