將所有同義詞更改爲另一個數據庫

Question

我有生產數據庫（例如，PROD1）。它對另一個數據庫有很多同義詞（例如，PROD2）。

我已經創建PROD2_TEST（截至PROD2完全複製），也PROD1_TEST（截至PROD1完整副本）。但結果我有PROD2的同義詞，而不是PROD2_TEST。

如何，我可以自動重新創建測試數據庫的所有同義詞？

Answer 1

無法更改同義詞，您必須刪除並創建它們。以下文章包含用於爲一系列表創建同義詞的腳本。希望你可以修改它以滿足您的需求：

Use synonyms to abstract SQL Server objects

您可以使用sys.synonyms視圖中查看所有現有的同義詞。在僞代碼，你想要做的是：

• 創建臨時表來存儲代名詞name和base_object_name
• 全部來自sys.synonyms不正確的同義詞選擇到臨時表
• 刪除不正確的同義詞
• 構建語句複製的代名詞，但改變PROD2到PROD2_TEST
• 運行該聲明

Answer 2

這裏的東西我用於重新映射所有同義詞在同一臺服務器上的一個新的數據庫（基於Tobsey的建議）

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 

Answer 3

我不得不爲同樣的原因，做到這一點，這是查詢我用過的。運行查詢，將結果複製粘貼到新服務器（PROD_Test）並運行生成的查詢。它可以處理不同的模式名稱和多個數據庫的情況下，你使用它們：

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 

Answer 4

基於@artm建議我擴大它只是一點點，包括參數，使之更加通用。這裏是代碼

DECLARE @newDB VARCHAR(MAX) = 'finbaza', --newDB to point the synonym to 
    @linkedSrv VARCHAR(MAX) = null --if the synonym points to a linked server than specify it here like (including the (dot) in the end [LinkedSrv]. 

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`