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我不知道我想要做什么是可能的,但我只是好奇而已。UDT的多种输入类型
我有发言权的MyType的用户定义类型是一个TINYINT与规定允许的值必须是我想什么3,介于0和
-- Existing UDT & Rule which work
CREATE TYPE [MySchema].[MyTypes]
FROM [TINYINT]
CREATE RULE [MySchema].[MyTypes_Rule] AS
@Range BETWEEN 0 AND 3
sp_bindrule 'MySchema.MyTypes_Rule', 'MySchema.MyTypes'
知道规则沿是否有可能添加额外的规则/功能,这将允许我创建一个额外的规则,该规则将采用NVARCHAR值,并且如果它在该范围内,则将其转换为适当的TINYINT值。
CREATE RULE [MySchema].[MyTypes_NVARCHAR_Rule1] AS
@InValues IN (N'N', N'A', N'B', N'C')
CREATE RULE [MySchema].[MyTypes_NVARCHAR_Rule1] AS
@InValues IN (N'No Choice', N'Choice A', N'Choice B', N'Choice C')
,然后做一些类型转换的从“选择A”或“A”至1的值,“选择B”或“B”到2的值,等等,等等,等等
下面的脚本将类似于我希望在字符串转换为允许值时执行的功能。
CREATE TABLE [MyTable]
([MyValue] BIT,
[Description] NVARCHAR(20))
GO
INSERT INTO [MyTable]
([MyValue], [Description])
SELECT 0, 'Enterered as 0' -- false
UNION
SELECT 1, 'Enterered as 1' -- true
UNION
SELECT CAST(0 AS BIT), 'Enterered as CAST(0 AS BIT)' -- false
UNION
SELECT CAST(1 AS BIT), 'Enterered as CAST(1 AS BIT)' -- true
UNION
SELECT CAST('false' AS BIT), 'Enterered as CAST(''false'' AS BIT)' -- false
UNION
SELECT CAST('true' AS BIT), 'Enterered as CAST(''true'' AS BIT)' -- true