可以用SQL SERVER CLR sql function来实现这一功能。
首先,我们在VSTS中创建一Database Project,增一个class, 实现下面的一个方法:
1: ///
2: /// Regs the ex match.
3: ///
4: /// The input value.
5: /// The regex pattern.
6: ///
7: ///
8: [SqlFunction]
9: public static bool RegExMatch(string inputValue, string regexPattern)
10: {
11: // Any nulls - we can't match, return false
12: if (string.IsNullOrEmpty(inputValue) || string.IsNullOrEmpty(regexPattern))
13: return false;
14:
15: Regex r1 = new Regex(regexPattern.TrimEnd(null));
16: return r1.Match(inputValue.TrimEnd(null)).Success;
17: }
好了,Build后Deploy到你的Target database就OK了,VisualStudio会自动注册这个程序集的。如果,你想手动注册程序集,可执行以下的T-SQL:
1: CREATE ASSEMBLY [RegExCLR] FROM 'RegExCLR.dll';
2:
3: -- Add the REGEX function. We want a friendly name
4: -- RegExMatch rather than the full namespace name.
5: -- Note the way we have to specify the Assembly.Namespace.Class.Function
6: -- NOTE the RegExCLR.RegExCLR
7: -- (one is the assembly the other is the namespace)
8: CREATE FUNCTION RegExMatch ( @inputCalue NVARCHAR(4000),
9: @regexPattern NVARCHAR(4000) ) RETURNS BIT
10: AS EXTERNAL NAME RegExCLR.RegExCLR.ClrClass.RegExMatch;
OK, 一切OK的后,我们来测试下:
select COUNT(1) from Threads where dbo.RegExMatch(ThreadId,'^[{|\(]?[0-9a-fA-F]{8}[-]?([0-9a-fA-F]{4}[-]?){3}[0-9a-fA-F]{12}[\)|}]?$')=1
上面的T-SQL是找出Threads表ThreadId是GUID的记录数。 等于1是匹配,^[{|\(]?[0-9a-fA-F]{8}[-]?([0-9a-fA-F]{4}[-]?){3}[0-9a-fA-F]{12}[\)|}]?$ 匹配GUID的正则表达式。
完了,希望这篇POST对您有帮助。