重定义自定义类型

Posted 2020-11-04 堡主大名花花

IF EXISTS (SELECT 1 FROM sys.types t join sys.schemas s on t.schema_id=s.schema_id

      and t.name=‘MyTableType‘ and s.name=‘dbo‘)

 EXEC sys.sp_rename ‘dbo.MyTableType‘, ‘obsoleting_MyTableType‘;

GO

 

 

--重建TYPE，比如原来是四个字段，现在想修改为三个字段，或者原来有三个字段想加一个字段变成四个字段

CREATE TYPE dbo.MyTableType AS TABLE(

 Id INT NOT NULL,

 Name VARCHAR(255) NOT NULL，　　 Remark VARCHAR(255)

)

GO

 

--将原来引用将要删除的TYPE全部重建一遍，否则原始存储过程会报错

DECLARE @Name NVARCHAR(500);

DECLARE REF_CURSOR CURSOR FOR

SELECT referencing_schema_name + ‘.‘ + referencing_entity_name

FROM sys.dm_sql_referencing_entities(‘dbo.MyTableType‘, ‘TYPE‘);

 OPEN REF_CURSOR;

 FETCH NEXT FROM REF_CURSOR INTO @Name;

 WHILE (@@FETCH_STATUS = 0)

 BEGIN

  EXEC sys.sp_refreshsqlmodule @name = @Name;

  FETCH NEXT FROM REF_CURSOR INTO @Name;

 END;

CLOSE REF_CURSOR;

DEALLOCATE REF_CURSOR;

GO

 

--最后删除原始的被重命名的TableType(被第一步重名的那个)

IF EXISTS (SELECT 1 FROM sys.types t

   join sys.schemas s on t.schema_id=s.schema_id

   and t.name=‘obsoleting_MyTableType‘ and s.name=‘dbo‘)

 DROP TYPE dbo.obsoleting_MyTableType

GO

 

--最后执行授权

GRANT EXECUTE ON TYPE::dbo.MyTableType TO public

GO