使用@synTarget插入到语句中

Question

我目前正在使用SQL Server 2008 R2

DECLARE @synName VARCHAR(100), @synTarget VARCHAR(150), @synSchemaName VARCHAR (110)

DECLARE Syns CURSOR LOCAL STATIC FOR
   SELECT 
      s.name, base_object_name, sc.name AS synSchemaName
   FROM 
      sys.synonyms s
   INNER JOIN 
      sys.schemas sc ON s.schema_id = sc.schema_id
   WHERE 
      s.name in ('bunt') 

OPEN Syns

FETCH NEXT FROM Syns INTO @synName, @synTarget, @synSchemaName

WHILE @@FETCH_STATUS <> -1
BEGIN
    PRINT 'DROP SYNONYM guest.' + @synName

    EXEC ('DROP SYNONYM guest.' + @synName) 

    SET @synTarget = CASE 
                        WHEN @synTarget LIKE '%ChardCake2%' 
                          THEN REPLACE(@synTarget, 'ChardCake2', 'ChardCake3')
                        WHEN @synTarget LIKE '%ChardCake3%' 
                          THEN REPLACE(@synTarget, 'ChardCake3', 'ChardCake4')
                        WHEN @synTarget LIKE '%ChardCake4%' 
                          THEN REPLACE(@synTarget, 'ChardCake4', 'ChardCake2')
                     END

    PRINT 'CREATE SYNONYM guest.' + @synName + ' FOR ' + @synTarget
    EXEC ('CREATE SYNONYM guest.' + @synName + ' FOR ' + @synTarget) 

    PRINT 'TRUNCATE TABLE'+@syntarget
    EXEC ('TRUNCATE TABLE'+@syntarget)

    FETCH NEXT FROM Syns INTO @synName, @synTarget, @synSchemaName

    INSERT INTO ChardCake3 
        SELECT * 
        FROM ChardCake2
END

CLOSE Syns
DEALLOCATE Syns

以上查询用于在我的数据库中自动删除和创建同义词。我遇到的一个问题是我已经将insert插入到声明中，我试图避免这样做。

我尝试过使用

INSERT INTO @synTarget 
    SELECT * FROM ChardCake''

并没有表明发生任何事情，而且''语法不正确。

我也尝试过添加

SET @newSynTarget = CASE 
                       WHEN @newSynTarget LIKE '%ChardCake2%' 
                          THEN REPLACE(@curSynTarget, 'ChardCake2', 'ChardCake4')
                       WHEN @newSynTarget LIKE '%ChardCake3%' 
                          THEN REPLACE(@curSynTarget, 'ChardCake3', 'ChardCake2')
                       WHEN @newSynTarget LIKE '%ChardCake4%' 
                          THEN REPLACE(@curSynTarget, 'ChardCake4', 'ChardCake3')
                    END

和

SELECT @sql = 'INSERT INTO ' + quotename(@newSynTarget) + 
              ' SELECT * FROM ' + quotename(@curSynTarget)`

当我在表中截断后也在查询中运行它时，它显示好像什么都没有。

我无法弄清楚如何获得

SELECT @sql = 'INSERT INTO ' + quotename(@newSynTarget) + 
              ' SELECT * FROM ' + quotename(@curSynTarget)

实际上可以在查询和函数中看到。还有什么我需要做才能让它发挥作用。

原创^

    use TestingT1
go

DECLARE @synName VARCHAR(100), @synTarget VARCHAR(150), @synSchemaName VARCHAR (110)

DECLARE Syns CURSOR LOCAL STATIC FOR
SELECT s.name, base_object_name, sc.name AS synSchemaName
 FROM sys.synonyms s
   INNER JOIN sys.schemas sc
     ON s.schema_id = sc.schema_id
  where s.name in ('bunt') 
OPEN Syns
FETCH NEXT FROM Syns INTO @synName, @synTarget, @synSchemaName
WHILE @@FETCH_STATUS <> -1
BEGIN
PRINT 'DROP SYNONYM guest.' + @synName
EXEC ('DROP SYNONYM guest.' + @synName) 
SET @synTarget = CASE 
                        WHEN @synTarget LIKE '%ChardCake2%' THEN REPLACE(@synTarget,'ChardCake2','ChardCake3')
                        WHEN @synTarget LIKE '%ChardCake3%' THEN REPLACE(@synTarget,'ChardCake3','ChardCake4')
                        WHEN @synTarget LIKE '%ChardCake4%' THEN REPLACE(@synTarget,'ChardCake4','ChardCake2')
           END
PRINT 'CREATE SYNONYM guest.' + @synName + ' FOR ' +@synTarget
EXEC ('CREATE SYNONYM guest.' + @synName + ' FOR ' +@synTarget)
PRINT 'TRUNCATE TABLE'+@syntarget
EXEC ('TRUNCATE TABLE'+@syntarget)
FETCH NEXT FROM Syns INTO @synName, @synTarget, @synSchemaName
DECLARE @sql varchar(2000), @newSynTarget varchar(20), @curSynTarget varchar(20) select @sql = '', @newSynTarget = 'newSynTarget', @curSynTarget = 'currentSynTarget'
SET @newSynTarget = CASE 
                       WHEN @newSynTarget LIKE '%ChardCake2%' THEN REPLACE(@curSynTarget, 'ChardCake2', 'ChardCake4')
                       WHEN @newSynTarget LIKE '%ChardCake3%' THEN REPLACE(@curSynTarget, 'ChardCake3', 'ChardCake2')
                       WHEN @newSynTarget LIKE '%ChardCake4%' THEN REPLACE(@curSynTarget, 'ChardCake4', 'ChardCake3')
                    END
SELECT @sql = 'INSERT INTO ' + quotename(@newSynTarget) + ' SELECT * FROM ' + quotename(@curSynTarget) EXEC (@sql)
END
CLOSE Syns
DEALLOCATE Syns

我已将附加信息添加到查询中，但结果仍然与之前运行命令时没有任何反应相同，并且前一个表信息未插入到同义词所指向的当前表中。

例如，我当前的同义词指向ChardCake2，一旦我运行Query，它现在指向ChardCake3并清除表。

目前，在将同义词更改为指向3

之前，该表中包含信息

testcolumn  testcolumns testing
1   2   3
1   2   3
1   2   3
1   2   3
1   2   3
1   2   3
1   2   3
1   2   3
1   2   3
1   2   3
1   2   3
1   2   3
1   2   3
1   2   3
1   2   3

一旦命令运行，这就是表格的样子

testcolumn testcolumns测试

上一个表中包含信息，没有任何内容移到当前表中。