SQL Server 序列设置当前值 [英] SQL Server sequence set current value

问题描述

我正在使用 SQL Server 2012 (v11.0.2100)，我想创建一个以随机(动态)数字开头的序列，但我无法做到这一点，我也努力寻找一个好的解决方案为此，但我还没有找到能让我满意的东西.

I am using SQL Server 2012 (v11.0.2100) and I want to create a sequence that starts with a random (dynamic) number but I wasn't able to do this, also I put my effort to find a good solution for this but I haven't found something that will satisfy me.

我尝试过但失败的案例:

The case that I tried and failed:

 DECLARE @sth bigint

 SET @sth = 1000

 ALTER SEQUENCE StreamEntrySequence
 RESTART WITH @sth;

错误:

'@sth' 附近的语法不正确

Incorrect syntax near '@sth'

一个丑陋的解决方案

 declare @sth bigint;
 declare @i bigint;

 SET @sth = 100000    ; 

 while @i<@sth;
 BEGIN
    SET @i= next value for StreamEntrySequence;
 END

是否有其他方法可以将当前值或起始值设置为随机值?也许使用服务器程序?

Is there other way to set the current value or the start value to a random value? Maybe using server procedures?

推荐答案

如前所述，这将需要动态 SQL，因为 alter sequence 要求 restart 参数的常量.

As has been mentioned, this would require dynamic SQL since alter sequence requires a constant for the restart argument.

你可以这样做，然后:

DECLARE @sth bigint;
SET @sth = 1000;
DECLARE @sql nvarchar(max);
SET @sql = N'ALTER SEQUENCE StreamEntrySequence RESTART WITH ' + cast(@sth as nvarchar(20)) + ';';
EXEC SP_EXECUTESQL @sql;

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