我有生产数据库(例如,PROD1
)。它与另一个数据库有很多同义词(例如,PROD2
)。
我已经创建PROD2_TEST
(作为 的完整副本PROD2
)和PROD1_TEST
(作为 的完整副本PROD1
)。但结果我有PROD1_TEST
同义词PROD2
,而不是PROD2_TEST
。
如何,我可以自动重新创建测试数据库的所有同义词?
我有生产数据库(例如,PROD1
)。它与另一个数据库有很多同义词(例如,PROD2
)。
我已经创建PROD2_TEST
(作为 的完整副本PROD2
)和PROD1_TEST
(作为 的完整副本PROD1
)。但结果我有PROD1_TEST
同义词PROD2
,而不是PROD2_TEST
。
如何,我可以自动重新创建测试数据库的所有同义词?
根据@artm 的建议,我稍微扩展了它以包含参数以使其更通用。这是代码
DECLARE @newDB VARCHAR(MAX) = 'newDB', --newDB to point the synonym to
@linkedSrv VARCHAR(MAX) = null --if the synonym points to a linked server than specify it here like '[LinkedSrv].' (including the dot in the end)
SELECT 'Drop Synonym [' + SCHEMA_NAME(schema_id) + '].[' + PARSENAME(base_object_name, 1) + '];' AS dropSynonym,
' CREATE SYNONYM [' + SCHEMA_NAME(schema_id) + '].[' + UPPER(PARSENAME(base_object_name, 1)) + '] FOR '
+ COALESCE(@linkedSrv, '') + '[' + @newDB + '].[' + COALESCE(PARSENAME(base_object_name, 2),
SCHEMA_NAME(SCHEMA_ID())) + '].['
+ UPPER(PARSENAME(base_object_name, 1)) + '];' AS createSynonym
FROM sys.synonyms`
出于同样的原因,我不得不这样做,这是我使用的查询。运行查询,将结果复制粘贴到新服务器 (PROD_Test) 并运行生成的查询。如果您使用它们,它会处理不同的模式名称和多个数据库:
SELECT 'Drop Synonym [' + SCHEMA_NAME(schema_id) + '].[' + PARSENAME(base_object_name,1) + '];CREATE SYNONYM [' +
SCHEMA_NAME(schema_id) + '].[' + PARSENAME(base_object_name,1) + '] FOR [' + COALESCE(PARSENAME(base_object_name,3),DB_NAME(DB_ID())) + '_Test].['
+ COALESCE(PARSENAME(base_object_name,2),SCHEMA_NAME(SCHEMA_ID())) + '].[' + PARSENAME(base_object_name,1) + '];'
FROM sys.synonyms
无法更改同义词,您必须删除并创建它们。以下文章包含为一系列表创建同义词的脚本。希望您可以修改它以满足您的需求:
您可以使用该视图查看所有现有的同义词sys.synonyms
。在伪代码中,您想要做的是:
name
和base_object_name
PROD2
为PROD2_TEST
这是我用来将所有同义词重新映射到同一服务器上的新数据库的东西(基于 Tobsey 的建议)
SET NOCOUNT ON;
DECLARE @db_name SYSNAME
DECLARE @schema_name SYSNAME
DECLARE @cmd NVARCHAR(256)
SET @schema_name = N'dbo'
SET @db_name = N'[newdb]'
DECLARE @schema_id INT
SELECT @schema_id = schema_id
FROM sys.schemas
WHERE NAME = @schema_name;
DECLARE @table_list TABLE (table_name SYSNAME,dest_table_name sysname,dest_schema_name sysname)
DECLARE @table_name SYSNAME
declare @dest_table_name sysname
declare @dest_schema_name sysname
DECLARE @prefix NVARCHAR(50)
DECLARE @synonym SYSNAME
DECLARE @linked_server SYSNAME
SET @linked_server = N'SERVER'
-- create a synonym for these tables (insert each table)
INSERT INTO @table_list (table_name,dest_table_name,dest_schema_name)
SELECT name
,'['+SUBSTRING(name,CHARINDEX('.',name,CHARINDEX('.',name,0)+1)+1,LEN(name)-CHARINDEX('.',name,CHARINDEX('.',name,0)+1))+']'
,SUBSTRING(name,CHARINDEX('.',name,0)+1,CHARINDEX('.',name,CHARINDEX('.',name,0)+1)-CHARINDEX('.',name,0)-1)
FROM sys.synonyms
WHERE base_object_name LIKE '![SERVER!].![olddb!]%' ESCAPE ('!')
ORDER BY name
IF EXISTS (
SELECT *
FROM sys.servers
WHERE NAME = @linked_server
)
-- 4 part name
SET @prefix = @linked_server + N'.' + @db_name
ELSE
-- 3 part name
SET @prefix = @db_name
SELECT TOP 1 @table_name = table_name,@dest_table_name = dest_table_name,@dest_schema_name=dest_schema_name
FROM @table_list
WHILE @table_name IS NOT NULL
BEGIN
-- set the schema and name for the synonym
SET @synonym = @schema_name+ N'.' + '['+@table_name+']'
-- delete the synonym if it exists
IF EXISTS (
SELECT *
FROM sys.synonyms
WHERE NAME = @table_name
AND schema_id = @schema_id
)
BEGIN
SET @cmd = N'drop synonym ' + @synonym
PRINT @cmd
--EXEC sp_executesql @cmd
END
-- create the synonym
SET @cmd = N'create synonym ' + @synonym + N' for ' + @prefix + N'.'+ @dest_schema_name + N'.'+ @dest_table_name
PRINT @cmd
--EXEC sp_executesql @cmd
PRINT 'GO'
DELETE TOP (1)
FROM @table_list
SET @table_name = NULL
SELECT TOP 1 @table_name = table_name,@dest_table_name = dest_table_name,@dest_schema_name=dest_schema_name
FROM @table_list
END
GO
对@kuklei 的答案进行了更改,以修复本地名称与它们引用的对象不同的同义词。此外,允许使用临时表一次进行多次替换(请将“插入#Replacements”部分中的值替换为您要进行的替换):
create table #Replacements
(
SearchString varchar(100)
,OldPrefix varchar(100)
,NewPrefix varchar(100)
)
insert into #Replacements
values
('_productiondb%','[productiondb]','[not_productiondb]') -- renamed local db
,('_192.168.100.1_._productdb%','[192.168.100.1].[productdb]','[productdb]') -- Moved db from remote to local
,('_192.168.100.1_._reportdb%','[192.168.100.1].[reportdb]','[not_reportdb]') -- renamed remote db
SELECT
dropSynonym =
'DROP SYNONYM ['
+ SCHEMA_NAME(schema_id)
+ '].['
+ name
+ '];'
,createSynonym =
' CREATE SYNONYM ['
+ SCHEMA_NAME(schema_id)
+ '].['
+ name
+ '] FOR '
+ REPLACE(base_object_name,OldPrefix,NewPrefix)
,synonymName =
'['
+ SCHEMA_NAME(schema_id)
+ '].['
+ name
+ ']'
,oldSynonymTarget = base_object_name
,newPrefix
FROM sys.synonyms s
left join #Replacements r
on s.base_object_name like r.SearchString
order by
createSynonym
drop table #Replacements