1

我从这个脚本创建了一个表。数据库是分区的。

print 'Create Table - tenant_Import'
go

create table tenant_Import
(
    Import_Data_Id bigint not null identity(100000000000000, 1),
    Audit_Login_Id bigint not null default 0,
    Tenant_Id bigint not null,
    Tenant_Partition bigint not null,
    Map_Id bigint not null,
    Filename nvarchar(500)  not null,
    DataFile varbinary(max) not null,
    Status int not null,
    DateInserted datetime not null DEFAULT GETDATE(),
    DateProcessed datetime null
)
on partition_name_Data(Tenant_Partition)
go

grant select, insert, update, delete on tenant_Import to a_named_role
go

alter table tenant_Import
add constraint pk_Import_Data 
  primary key (Tenant_Partition, Tenant_Id, Import_Data_Id)
  on partition_name_Data(Tenant_Partition)
go

create index ix1_Import_Data 
on tenant_Import (Tenant_Partition, Tenant_Id, Map_Id)
with fillfactor = 75
on partition_name_Index(Tenant_Partition)
go

我在这个表中添加了行。

如果我尝试更改一个值（例如将 null 更改为非 null）并单击 SSMS 中的保存，则会出现错误：

“tenant_Import”表 - 无法修改表。关键字“DEFAULT”附近的语法不正确。

关于可能导致这种情况的任何想法？这是在 SQL Server 2005 Enterprise 中。

==================================================== ============================ 一些评论/答案要求的更改脚本如下（我将 DateInserted 从 not null 更改为 null ，但如果我尝试更改任何列，则会出现错误消息）：

/* To prevent any potential data loss issues, you should review this script in detail before running it outside the context of the database designer.*/
BEGIN TRANSACTION
SET QUOTED_IDENTIFIER ON
SET ARITHABORT ON
SET NUMERIC_ROUNDABORT OFF
SET CONCAT_NULL_YIELDS_NULL ON
SET ANSI_NULLS ON
SET ANSI_PADDING ON
SET ANSI_WARNINGS ON
COMMIT
BEGIN TRANSACTION
GO
ALTER TABLE dbo.tenant_Import
    DROP CONSTRAINT DF__tenant_Im__Audit__740F363E
GO
ALTER TABLE dbo.tenant_Import
    DROP CONSTRAINT DF__tenant_Im__DateI__75035A77
GO
CREATE TABLE dbo.Tmp_tenant_Import
    (
    Import_Data_Id bigint NOT NULL IDENTITY (101000000000000, 1),
    Audit_Login_Id bigint NOT NULL,
    Tenant_Id bigint NOT NULL,
    Tenant_Partition bigint NOT NULL,
    Map_Id bigint NOT NULL,
    Filename nvarchar(500) NOT NULL,
    DataFile varbinary(MAX) NOT NULL,
    Status int NOT NULL,
    DateInserted datetime NULL,
    DateProcessed datetime NULL
    )  ON partition_name_Data(Tenant_Partition) 
     TEXTIMAGE_ON  DEFAULT 
GO
GRANT DELETE ON dbo.Tmp_tenant_Import TO a_named_role  AS dbo
GO
GRANT INSERT ON dbo.Tmp_tenant_Import TO a_named_role  AS dbo
GO
GRANT SELECT ON dbo.Tmp_tenant_Import TO a_named_role  AS dbo
GO
GRANT UPDATE ON dbo.Tmp_tenant_Import TO a_named_role  AS dbo
GO
ALTER TABLE dbo.Tmp_tenant_Import ADD CONSTRAINT
    DF__tenant_Im__Audit__740F363E DEFAULT ((0)) FOR Audit_Login_Id
GO
ALTER TABLE dbo.Tmp_tenant_Import ADD CONSTRAINT
    DF__tenant_Im__DateI__75035A77 DEFAULT (getdate()) FOR DateInserted
GO
SET IDENTITY_INSERT dbo.Tmp_tenant_Import ON
GO
IF EXISTS(SELECT * FROM dbo.tenant_Import)
     EXEC('INSERT INTO dbo.Tmp_tenant_Import (Import_Data_Id, Audit_Login_Id, Tenant_Id, Tenant_Partition, Map_Id, Filename, DataFile, Status, DateInserted, DateProcessed)
        SELECT Import_Data_Id, Audit_Login_Id, Tenant_Id, Tenant_Partition, Map_Id, Filename, DataFile, Status, DateInserted, DateProcessed FROM dbo.tenant_Import WITH (HOLDLOCK TABLOCKX)')
GO
SET IDENTITY_INSERT dbo.Tmp_tenant_Import OFF
GO
DROP TABLE dbo.tenant_Import
GO
EXECUTE sp_rename N'dbo.Tmp_tenant_Import', N'tenant_Import', 'OBJECT' 
GO
ALTER TABLE dbo.tenant_Import ADD CONSTRAINT
    pk_Import_Data PRIMARY KEY CLUSTERED 
    (
    Tenant_Partition,
    Tenant_Id,
    Import_Data_Id
    ) WITH( STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON partition_name_Data(Tenant_Partition) 

GO
CREATE NONCLUSTERED INDEX ix1_Import_Data ON dbo.tenant_Import
    (
    Tenant_Partition,
    Tenant_Id,
    Map_Id
    ) WITH( PAD_INDEX = OFF, FILLFACTOR = 75, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON partition_name_Index(Tenant_Partition) 
GO
COMMIT
4

1 回答 1

2

当您使用 SSMS 更改表时 - SSMS 除了生成更改脚本并为您执行之外没有任何作用。

您可以在设计窗口中右键单击并选择Generate Change Script...在运行之前自行检查脚本。

SSMS 不是万能的，那些脚本可能有错误。很多时候你不能用它来改变表，但必须自己写一个命令。事实上，我强烈建议尽可能少地使用它来更改表，因为它通常会使简单的操作过于复杂。

您可以将 NOT NULL 更改为 NULL 列（以 Map_Id 为例）：

ALTER TABLE tenant_Import_Data
ALTER COLUMN Map_Id BIGINT NULL
于 2013-05-22T15:05:28.373 回答