重命名 SQL Server 架构

Question

如何使用 SQL Server 重命名架构？

Answer 1

如果模式中有大量对象，您可以使用类似的方法自动生成所有更改（它只处理表和视图，因此在运行它之前，您可能需要将其扩展到 SP、UDF、等）

USE SandBox

DECLARE @OldSchema AS varchar(255)
DECLARE @NewSchema AS varchar(255)
DECLARE @newLine AS varchar(2) = CHAR(13) + CHAR(10)

SET @OldSchema = 'dbo'
SET @NewSchema = 'StackOverflow'

DECLARE @sql AS varchar(MAX)

SET @sql = 'CREATE SCHEMA [' + @NewSchema + ']' + @newLine
SELECT @sql = @sql + 'GO' + @newLine
SELECT @sql = @sql + 'ALTER SCHEMA [' + @NewSchema + '] TRANSFER [' + TABLE_SCHEMA + '].[' + TABLE_NAME + ']'
     + @newLine
FROM INFORMATION_SCHEMA.TABLES
WHERE TABLE_SCHEMA = @OldSchema

SET @sql = @sql + 'DROP SCHEMA [' + @OldSchema + ']'

PRINT @sql -- NOTE PRINT HAS AN 8000 byte limit - 8000 varchar/4000 nvarchar - see comments
IF (0=1) EXEC (@sql)

Answer 2

您可以通过以下方式将单个对象从一种模式移动到另一种模式：

ALTER SCHEMA NewSchema TRANSFER OldSchema.Object;

Answer 3

我将上面的两段代码结合起来，使用游标不受字符串变量大小的限制，单独执行命令。我假设您已经创建了新模式，并在证明一切正常后删除旧模式。这样更安全...:)

DECLARE @OldSchema AS varchar(255)
DECLARE @NewSchema AS varchar(255)

SET @OldSchema = 'dbo'
SET @NewSchema = 'StackOverflow'

DECLARE @sql AS varchar(MAX)

DECLARE @Schema AS varchar(MAX)
DECLARE @Obj AS varchar(MAX)

-- First transfer Tables and Views

DECLARE CU_OBJS CURSOR FOR
    SELECT TABLE_SCHEMA, TABLE_NAME
    FROM INFORMATION_SCHEMA.TABLES
    WHERE TABLE_SCHEMA = @OldSchema

OPEN CU_OBJS

FETCH NEXT FROM CU_OBJS
INTO @Schema, @Obj

WHILE @@FETCH_STATUS = 0
BEGIN
    SELECT @sql = 'ALTER SCHEMA [' + @NewSchema + '] TRANSFER [' + @OldSchema + '].[' + @Obj + ']'
    PRINT @sql
--  EXEC (@sql)

    FETCH NEXT FROM CU_OBJS
    INTO @Schema, @Obj
END

CLOSE CU_OBJS
DEALLOCATE CU_OBJS


-- Now transfer Stored Procedures

DECLARE CU_OBJS CURSOR FOR
    SELECT sys.schemas.name, sys.procedures.name
    FROM sys.procedures,sys.schemas
    WHERE sys.procedures.schema_id=sys.schemas.schema_id and sys.schemas.name = @OldSchema

OPEN CU_OBJS

FETCH NEXT FROM CU_OBJS
INTO @Schema, @Obj

WHILE @@FETCH_STATUS = 0
BEGIN
    SELECT @sql = 'ALTER SCHEMA [' + @NewSchema + '] TRANSFER [' + @Schema + '].[' + @Obj + ']'
    PRINT @sql
--  EXEC (@sql)

    FETCH NEXT FROM CU_OBJS
    INTO @Schema, @Obj
END

CLOSE CU_OBJS
DEALLOCATE CU_OBJS

Answer 4

在 SQL Server 2008 中重命名具有更多表的架构的存储过程

   IF OBJECT_ID ( 'dbo.RenameSchema', 'P' ) IS NOT NULL 
    DROP PROCEDURE dbo.RenameSchema;
   GO                         

CREATE PROCEDURE dbo.RenameSchema               

 @OLDNAME  varchar(500),
@NEWNAME  varchar(500)

AS            
     /*check for oldschema exist or not */
     IF NOT EXISTS (SELECT 1 FROM sys.schemas WHERE name =  @OLDNAME)

        BEGIN

            RETURN

        END

       /* Create the schema with new name */
      IF NOT EXISTS (SELECT 1 FROM sys.schemas WHERE name = @NEWNAME)

      BEGIN

          EXECUTE( 'CREATE SCHEMA ' + @NEWNAME );

       END                

     /* get the object under the old schema and transfer those objects to new schema */
     DECLARE Schema_Cursor CURSOR FOR

    SELECT ' ALTER SCHEMA ' + @NEWNAME + ' TRANSFER '+ SCHEMA_NAME(SCHEMA_ID)+'.'+ name  
    as ALTSQL from sys.objects WHERE type IN ('U','V','P','Fn') AND 
    SCHEMA_NAME(SCHEMA_ID) = @OLDNAME;

   OPEN Schema_Cursor;          

  DECLARE @SQL varchar(500)         

   FETCH NEXT FROM Schema_Cursor INTO @SQL;

   WHILE @@FETCH_STATUS = 0
    BEGIN
    exec (@SQL) 
    FETCH NEXT FROM Schema_Cursor INTO @SQL;
   END;

   CLOSE Schema_Cursor;

   DEALLOCATE Schema_Cursor;

   /* drop the old schema which should be the user schema */
   IF @OLDNAME <> 'dbo' and  @OLDNAME <> 'guest'
   BEGIN
    EXECUTE ('DROP SCHEMA ' + @OLDNAME) 
    END
   GO

执行重命名模式的过程： 例子：

    EXECUTE RenameSchema 'oldname','newname'
    EXECUTE RenameSchema 'dbo','guest'  

Answer 5

这是一个简短的版本，但效果很好。

declare @sql varchar(8000), @table varchar(1000), @oldschema varchar(1000), @newschema   varchar(1000)

  set @oldschema = 'old'
  set @newschema = 'dbo'

 while exists(select * from sys.tables where schema_name(schema_id) = @oldschema)

  begin
      select @table = name from sys.tables 
      where object_id in(select min(object_id) from sys.tables where  schema_name(schema_id)  = @oldschema)

    set @sql = 'alter schema [' + @newschema + '] transfer [' + @oldschema + '].[' + @table + ']'

   exec(@sql)
 end

Answer 6

办理手续

USE DatabaseName

DECLARE @OldSchema AS varchar(255)
DECLARE @NewSchema AS varchar(255)

SET @OldSchema = 'ComputerLearn'
SET @NewSchema = 'Basic'

DECLARE @sql AS varchar(MAX)

SET @sql = 'CREATE SCHEMA [' + @NewSchema + ']' + CHAR(13) + CHAR(10)

SELECT @sql = @sql + 'ALTER SCHEMA [' + @NewSchema + '] TRANSFER [' + sys.schemas.name + '].[' + sys.procedures.name + ']'
     + CHAR(13) + CHAR(10)
FROM sys.procedures,sys.schemas
WHERE sys.procedures.schema_id=sys.schemas.schema_id and sys.schemas.name = @OldSchema

SET @sql = @sql + 'DROP SCHEMA [' + @OldSchema + ']'

PRINT @sql
IF (0=1) EXEC (@sql)

Answer 7

对我有用的最简单的解决方案是：
我只有一个模式 dbo，有两个表

PopulationByCountrySTG

和

CountryRegionSTG

(1) 我通过执行创建了一个新模式，

create schema stg

(2) 我执行了以下命令，

ALTER SCHEMA stg TRANSFER dbo.PopulationByCountrySTG;
ALTER SCHEMA stg TRANSFER dbo.CountryRegionSTG;

全部完成。让我知道它是否适合你。谢谢大家。

Answer 8

这不是一个好的解决方案，但可能有助于了解 SQL Server 现在的工作原理。

我正在使用代码优先方法的 Entity Framework Core ORM。

我尝试使用以下步骤重命名架构：

1. 删除属于该架构的所有表*
2. 使用重命名的架构创建新的 EF 迁移
3. 使用 .NET CLI 命令重新创建表：

dotnet ef database update

以上操作已完成，但架构未重命名。

我了解到我忘记删除 SQL Server 中的架构对象。 我的表正在重新创建，但我想要重命名的模式从未被删除。

一旦我删除了表并删除了架构，然后使用新架构名称运行 EF 迁移就可以了。

*（我可以这样做，因为这是一个全新的项目）