Sql Server重命名所有外键约束

公司服务器上的数据库原先是采用PowerDesigner设计的,那些外键约束的命名非常难看,并且也和后来在SSMS中额外添加的外键约束命名规则不一致,因此我想遍历数据库的所有外键约束,找到外键约束的相关对象,然后重新生成一致的命名。

我采用的命名规则是:

FK_ForeignTable_PrimaryTable_On_ForeignColumn

直白的翻译就是,ForeignTable在ForeignColumn列上引用了PrimaryTable的主键。

Sql Server提供了很多动态管理视图(Dynamic management views,DMV)和存储过程,方便我们对数据库进行维护。这里我用到了以下两个sys.foreign_key_columns(包含外键约束完整信 息)和sys.objects(数据库对象信息)这两个DMV以及sp_rename执行重命名的系统存储过程。代码如下:

declare fkcur cursor for
select
OBJECT_NAME(col.constraint_object_id) as FKConstraintName
,fkTable.name as FKTable
,fkCol.name as FKColumn
,pkTable.name as PKTable
,pkCol.name as PKColumn
from sys.foreign_key_columns col
-- 外键约束是建立在外键表上的,
-- 因此foreign_key_columns表中的parent_object_id和parent_column_id分别表示外键表和外键列
inner join sys.objects fkTable
    on fkTable.object_id = col.parent_object_id
inner join sys.columns fkCol
    on fkCol.column_id = col.parent_column_id
    and fkCol.object_id = fkTable.object_id
-- foreign_key_columns表中的referenced_object_id和referenced_column_id分别指向
-- 外键约束的主键表对象以及主键列
inner join sys.objects pkTable
    on pkTable.object_id = col.referenced_object_id
inner join sys.columns pkCol
    on pkCol.column_id = col.referenced_column_id
    and pkCol.object_id = pkTable.object_id
order by OBJECT_NAME(col.constraint_object_id)
 
open fkcur
declare @constraintName nvarchar(128)
declare @fkTable nvarchar(64)
declare @fkColumn nvarchar(64)
declare @pkTable nvarchar(64)
declare @pkColumn nvarchar(64)
declare @newConstraintName nvarchar(128)
 
fetch next from fkcur
into @constraintName,@fkTable,@fkColumn,@pkTable,@pkColumn
while @@FETCH_STATUS = 0
begin
    set @newConstraintName = 'FK_'+@fkTable+'_'+@pkTable+'_On_'+@fkColumn
    exec sp_rename @constraintName,@newConstraintName,'Object'
 
    fetch next from fkcur
    into @constraintName,@fkTable,@fkColumn,@pkTable,@pkColumn
end
close fkcur
deallocate fkcur

你可能感兴趣的:(SQL Server)