我们得到了一个脚本来禁用FK约束,通过传递'D'来禁用激活'A'。 一旦这些被禁止,他们再次获得几个小时或一天后启用回来。 可能是什么原因?FK约束自动启用+ SQL
脚本是如下:
CREATE PROCEDURE [dbo].[sp_DisableEnableForeignKeys] @PutFK CHAR(1)
as
DECLARE @IdFK integer
DECLARE @ForeignKey sysname
DECLARE @ChildTable sysname
DECLARE @ParentTable sysname
DECLARE @ParentColumn sysname
DECLARE @ChildColumn sysname
DECLARE @ParentColumns varchar(1000)
DECLARE @ChildColumns varchar(1000)
IF EXISTS (SELECT 1 FROM sysobjects where type = 'U' and Name ='metForeignKeys')
DROP TABLE metForeignKeys
SELECT * INTO metForeignKeys FROM
(
SELECT
FK.constid as IdFK,
FK.KeyNo,
sofk.name as [Foreign Key Name],
soch.name as [Child Table],
scch.name as [Child Column],
sopa.name as [Parent Table],
scpa.name as [Parent Column]
FROM
sysforeignkeys FK
INNER JOIN sysobjects sofk on FK.constId = sofk.id
INNER JOIN sysobjects soch on FK.fkeyid = soch.id
INNER JOIN syscolumns scch on FK.fkeyid = scch.id and FK.fkey = scch.colid
INNER JOIN sysobjects sopa on FK.rkeyid = sopa.id
INNER JOIN syscolumns scpa on FK.rkeyid = scpa.id and FK.rkey = scpa.colid
)T
DECLARE met_C_Delete CURSOR FOR SELECT DISTINCT IdFK, [Child Table] FROM metForeignKeys ORDER BY [Child Table]
OPEN met_C_Delete
FETCH NEXT FROM met_C_Delete into @IdFK, @ChildTable
WHILE @@Fetch_Status = 0
BEGIN
SELECT @ForeignKey = [Foreign Key Name], @ChildTable = [Child Table], @ParentTable = [Parent Table]
FROM metForeignKeys where IdFK = @IdFK
IF @PutFK = 'D'
BEGIN
EXEC('ALTER TABLE [' + @ChildTable + '] with check nocheck constraint ' + @ForeignKey)
IF @@ERROR = 0
BEGIN
--PRINT 'Disabled FK Constraint ' + @ForeignKey + ' on table ' + @ChildTable + ' referencing '[email protected]
PRINT @ChildTable+' - Disabled FK Constraint ' + @ForeignKey + ' referencing '[email protected]
END
ELSE
BEGIN
PRINT 'Error disabling FK Constraint ' + @ForeignKey + ' on table ' + @ChildTable + ' referencing '[email protected]
--PRINT @ChildTable+' - Enabled FK Constraint ' + @ForeignKey + ' referencing '[email protected]
END
END
ELSE
BEGIN
EXEC('ALTER TABLE [' + @ChildTable + '] with check check constraint ' + @ForeignKey)
IF @@ERROR = 0
BEGIN
PRINT 'Enabled FK Constraint ' + @ForeignKey + ' on table ' + @ChildTable + ' referencing '[email protected]
END
ELSE
BEGIN
PRINT 'Error enabling FK Constraint ' + @ForeignKey + ' on table ' + @ChildTable + ' referencing '[email protected]
END
END
FETCH NEXT FROM met_C_Delete into @IdFK, @ChildTable
END
CLOSE met_C_Delete
DEALLOCATE met_C_Delete
仅供参考,有一些性能调整提示,建议不要以“sp”开头,以系统存储过程的名称命名您的自定义存储过程,并且当SQL Server遇到sp_ProcedureName时,它会提取其存储的系统自定义之前的过程。常用命名是usp_ProcedureName。 – 2010-03-10 00:38:24
问题是什么/问题 - 你发现的外键被重新启用,而无需运行您发布的脚本? – 2010-03-10 00:38:50
是的小马,他们会重新启用运行这个脚本 – Sreedhar 2010-03-10 00:49:03