【发布时间】：2012-11-17 18:56:26
【问题描述】：
我的 sql 函数有问题。以下函数按预期运行，但当我替换时，它只返回一行：
CAST(t.ColumnName as nvarchar(100))
为：
REPLACE(CAST(t.ColumnName as nvarchar(100)), 'ID', 'Id')
怎么了？这是我的调用代码：
PRINT dbo.CreatePocoFromTable('dbo.OnePoundFish')
这是函数本身：
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
谢谢:)
【问题讨论】：
-
REPLACE工作与否与您的功能有何关系？ -
因为愿望结果是这样的： [DataField("ColumnID")] public Int32 ColumnId { get;放; } -- 其中一种格式以大写 ID 结尾，另一种正确的大小写 -- 也是 REPLACE 关键字阻止它枚举多于一行 -- 所以，它非常重要！
标签： sql sql-server sql-server-2008-r2 sql-function