Why does this sql function not work with REPLACE? - sql

Question

I am having a problem with my sql function. The following function operates as expect but when I substitute, it only returns one row:
CAST(t.ColumnName as nvarchar(100))
for:
REPLACE(CAST(t.ColumnName as nvarchar(100)), 'ID', 'Id')
What is wrong? Here is my calling code:
PRINT dbo.CreatePocoFromTable('dbo.OnePoundFish')
Here is the function itself:
CREATE FUNCTION [dbo].[CreatePocoFromTable]
(#SchemaAndName nvarchar(200))
RETURNS Nvarchar(MAX) AS
BEGIN
/* Example call:
PRINT dbo.CreatePocoFromTable('dbo.OnePoundFish')
*/
DECLARE #TableName NVARCHAR(100) = SUBSTRING(#SchemaAndName , CHARINDEX('.', #SchemaAndName ) + 1, LEN(#SchemaAndName ))
DECLARE #TableSchema NVARCHAR(100) = SUBSTRING(#SchemaAndName , 1, CHARINDEX('.', #SchemaAndName ) - 1)
DECLARE #result Nvarchar(max) = ''
SET #result = #result + 'using System;' + CHAR(13) + CHAR(13)
IF (#TableSchema IS NOT NULL)
BEGIN
SET #result = #result + 'namespace ' + #TableSchema + CHAR(13) + '{' + CHAR(13)
END
SET #result = #result + 'public class ' + #TableName + CHAR(13) + '{' + CHAR(13)
SET #result = #result + '#region Instance Properties' + CHAR(13)
SELECT #result = #result + CHAR(13)
-- BL/DAL/DataRepository Entity attributes
+ '[DataField("' + t.ColumnName + '")]' + CHAR(13)
+ ' public ' + t.ColumnType + ' ' + CAST(t.ColumnName as nvarchar(100)) + ' { get; set; } ' + CHAR(13)
FROM
(
SELECT
c.COLUMN_NAME AS ColumnName
, CASE c.DATA_TYPE
WHEN 'bigint' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'Int64?' ELSE 'Int64' END
WHEN 'binary' THEN 'Byte[]'
WHEN 'bit' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'Boolean?' ELSE 'Boolean' END
WHEN 'char' THEN 'String'
WHEN 'date' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END
WHEN 'datetime' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END
WHEN 'datetime2' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END
WHEN 'datetimeoffset' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'DateTimeOffset?' ELSE 'DateTimeOffset' END
WHEN 'decimal' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'Decimal?' ELSE 'Decimal' END
WHEN 'float' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'Single?' ELSE 'Single' END
WHEN 'image' THEN 'Byte[]'
WHEN 'int' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'Int32?' ELSE 'Int32' END
WHEN 'money' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'Decimal?' ELSE 'Decimal' END
WHEN 'nchar' THEN 'String'
WHEN 'ntext' THEN 'String'
WHEN 'numeric' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'Decimal?' ELSE 'Decimal' END
WHEN 'nvarchar' THEN 'String'
WHEN 'real' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'Double?' ELSE 'Double' END
WHEN 'smalldatetime' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END
WHEN 'smallint' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'Int16?' ELSE 'Int16'END
WHEN 'smallmoney' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'Decimal?' ELSE 'Decimal' END
WHEN 'text' THEN 'String'
WHEN 'time' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'TimeSpan?' ELSE 'TimeSpan' END
WHEN 'timestamp' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'DateTime?' ELSE 'DateTime' END
WHEN 'tinyint' THEN
CASE C.IS_NULLABLE
WHEN 'YES' THEN 'Byte?' ELSE 'Byte' END
WHEN 'uniqueidentifier' THEN 'Guid'
WHEN 'varbinary' THEN 'Byte[]'
WHEN 'varchar' THEN 'String'
ELSE 'Object'
END AS ColumnType
, c.ORDINAL_POSITION
FROM INFORMATION_SCHEMA.COLUMNS c
WHERE c.TABLE_NAME = #TableName and ISNULL(#TableSchema, c.TABLE_SCHEMA) = c.TABLE_SCHEMA
) t
ORDER BY t.ORDINAL_POSITION
SET #result = #result + CHAR(13) + '#endregion Instance Properties' + CHAR(13)
SET #result = #result + '}' + CHAR(13)
IF (#TableSchema IS NOT NULL)
BEGIN
SET #result = #result + CHAR(13) + '}'
END
RETURN #Result
END
Thanks :)

Answer 1

only the interesting part ...
SELECT #result = #result + CHAR(13)
-- BL/DAL/DataRepository Entity attributes
+ '[DataField("' + CAST(REPLACE(t.ColumnName , 'ID', 'Id') as nvarchar(100)) + '")]' + CHAR(13)
-- + '[DataField("' + t.ColumnName + '")]' + CHAR(13)
+ ' public ' + t.ColumnType + ' ' + CAST(t.ColumnName as nvarchar(100)) + ' { get; set; } ' + CHAR(13)
FROM

Answer 2

Is your sql server set to be case sensitive? If not (and I believe it's not by default) then replace based on different case of the same word will not work.
See this link to change the collation to a case sensitive one How do I change SQL Server 2005 to be case sensitive?