爲什麼此sql函數不適用於REPLACE？

我遇到了我的sql函數的問題。下面的函數工作作爲預期，但是當我替補，它只返回一行：爲什麼此sql函數不適用於REPLACE？

CAST(t.ColumnName as nvarchar(100))

爲：

REPLACE(CAST(t.ColumnName as nvarchar(100)), 'ID', 'Id')

有什麼不對？這裏是我的調用代碼：

PRINT dbo.CreatePocoFromTable('dbo.OnePoundFish')

下面是函數本身：

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

謝謝:)

來源

2012-11-17 CarneyCode

如何'REPLACE'，無論工作與否，關係到你的功能？ –

因爲慾望結果是這樣的：[DataField（「ColumnID」）] public Int32 ColumnId {get;組; } - 其中一種格式以大寫的ID和另一種適當的大小寫結尾 - 也是REPLACE關鍵字阻止它枚舉多行 - 所以，它非常重要！ – CarneyCode

只有最有趣的部分的情況下...

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

來源

2012-11-17 19:28:55 bummi

奇怪 - 這是我沒有嘗試的唯一變體。我很累，但我在考慮在演員演出之前或者其他方面做替換並不重要。 – CarneyCode

'CAST ... AS VARCHAR'應該是'CAST AS VARCHAR（某些長度）'。見http://sqlblog.com/blogs/aaron_bertrand/archive/2009/10/09/bad-habits-to-kick-declaring-varchar-without-length.aspx –

我知道他的意思 - 結果函數轉換爲NVARCHAR（100） - 就像原始代碼片段一樣 – CarneyCode

是SQL服務器設置爲區分大小寫？如果沒有（我相信它不是默認的），那麼根據同一個詞的不同情況進行替換將不起作用。

請參閱此鏈接給整理更改爲敏感的How do I change SQL Server 2005 to be case sensitive?

來源

2012-11-17 19:03:05

我不想改變整個數據庫的排序規則。在什麼級別上應用排序規則。例如，以下運行，但不會給出所需的結果：PRINT dbo.CreatePocoFromTable（'dbo.OnePoundFish'）COLLATE Latin1_GENERAL_CS_AS – CarneyCode

爲什麼此sql函數不適用於REPLACE？

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