Question

我有一个查询，使我可以删除所有表的所有行并重置所有表的所有标识列，而不会破坏任何外键引用。该查询非常适合普通的SQL Server表：

EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL';
EXEC sp_MSForEachTable 'DELETE FROM ?';
EXEC sp_MSForEachTable 'ALTER TABLE ? WITH CHECK CHECK CONSTRAINT ALL';
EXEC sp_MSforeachtable @command1 = 'DBCC CHECKIDENT (''?'', RESEED, 0)';

问题是，由于我使用的是系统版本的时态表，因此以前的查询不再起作用。我的版本表都命名为tbl_Foo，每个历史记录表的格式均为tbl_Foo_history。

我尝试使用类似这样的东西：

EXEC sp_MSForEachTable 'ALTER TABLE ? SET (SYSTEM_VERSIONING = OFF)';

EXEC sp_MSForEachTable 'ALTER TABLE ? NOCHECK CONSTRAINT ALL';
EXEC sp_MSForEachTable 'DELETE FROM ?';
EXEC sp_MSForEachTable 'ALTER TABLE ? WITH CHECK CHECK CONSTRAINT ALL';
EXEC sp_MSforeachtable @command1 = 'DBCC CHECKIDENT (''?'', RESEED, 0)';

EXEC sp_MSforeachtable 'ALTER TABLE ? SET (SYSTEM_VERSIONING = ON (HISTORY_TABLE = ''?''_history))';

但是它给出了错误：

SYSTEM_VERSIONING is not turned ON for table 'FOO.dbo.tbl_Foo_history'.

因为sp_MSForEachTable显然在尝试从历史记录表中删除版本时确实搞砸了。

如何在不为每个表单独指定查询的情况下执行此操作？

Answer 1

我通过使用Vim宏为每个表创建相同的查询来解决该问题。看起来很丑，但实际上实施起来很快：

ALTER TABLE dbo.tbl_Foo1 SET (SYSTEM_VERSIONING = OFF);
ALTER TABLE dbo.tbl_Foo2 SET (SYSTEM_VERSIONING = OFF);
ALTER TABLE ...

ALTER TABLE dbo.tbl_Foo1 NOCHECK CONSTRAINT ALL;
ALTER TABLE dbo.tbl_Foo2 NOCHECK CONSTRAINT ALL;
ALTER TABLE ...

DELETE FROM dbo.tbl_Foo1;
DELETE FROM dbo.tbl_Foo2;
DELETE FROM ...

DELETE FROM dbo.tbl_Foo1_history;
DELETE FROM dbo.tbl_Foo2_history;
DELETE FROM ...

DBCC CHECKIDENT ('[tbl_Foo1]', RESEED, 0);
DBCC CHECKIDENT ('[tbl_Foo2]', RESEED, 0);
DBCC CHECKIDENT ...

DBCC CHECKIDENT ('[tbl_Foo1_history]', RESEED, 0);
DBCC CHECKIDENT ('[tbl_Foo2_history]', RESEED, 0);
DBCC CHECKIDENT ...

ALTER TABLE dbo.tbl_Foo1 WITH CHECK CHECK CONSTRAINT ALL;
ALTER TABLE dbo.tbl_Foo2 WITH CHECK CHECK CONSTRAINT ALL;
ALTER TABLE ...

ALTER TABLE dbo.tbl_Foo1 SET (SYSTEM_VERSIONING = ON (HISTORY_TABLE = dbo.tbl_Foo1_history));
ALTER TABLE dbo.tbl_Foo2 SET (SYSTEM_VERSIONING = ON (HISTORY_TABLE = dbo.tbl_Foo2_history));
ALTER TABLE ...

如何在一个查询中清除所有系统版本表？

1 个答案: