Fre*_*ope 5 sql-server stored-procedures linked-server
我有 3 台服务器，其中一台配置了指向另一台的链接服务器——我称之为服务器 A。服务器 A 有超过 100 个用于各种目的的用户数据库。服务器 B 正在运行 SQL 2005，我们正试图消除它。服务器 C 拥有服务器 B 中一些数据库的副本，我们正在将应用程序从服务器 B 的数据库副本迁移到服务器 C。
当我在服务器 B 上时，我可以看到从服务器 A 到某个数据库的连接，但我不知道如何判断服务器 A 的哪些过程、任务或作业正在使用该链接服务器连接到服务器 B。
为了停用服务器 B 上的数据库，我需要将服务器 A 的连接重新指向服务器 C 上的数据库；但为了做到这一点，我需要知道服务器 A 上的哪些过程、任务或作业正在使用该连接，以便更新它们。
有没有办法在不禁用链接服务器的情况下查看链接服务器上的依赖关系以查看开始失败的内容？
好吧，您可以解析服务器 A 上的程序（只要它们未加密）和作业，以查找链接服务器的名称 - 但请记住，这些请求可以通过应用程序传入，从临时传入SQL，动态构建等，所以这不会捕获所有内容。如果链接服务器名称是可能在代码或注释中自然找到的常用术语，则这也可能产生误报。
DECLARE @sql NVARCHAR(MAX) = N'',
@p NVARCHAR(MAX),
@linked_server SYSNAME = N'%linked_server_name%';
SET @p = N' UNION ALL SELECT N''$db$'', s.name,
o.name FROM $db$.sys.sql_modules AS p
INNER JOIN $db$.sys.objects AS o
ON p.[object_id] = o.[object_id]
INNER JOIN $db$.sys.schemas AS s
ON o.[schema_id] = s.[schema_id]
WHERE p.definition LIKE @lsn';
SELECT @sql = @sql + REPLACE(@p, N'$db$', QUOTENAME(name))
FROM sys.databases; -- may want to filter out system dbs, offline, etc
SET @sql = STUFF(@sql, 1, 11, N'') + N';';
EXEC sys.sp_executesql @sql, N'@lsn SYSNAME', @linked_server;
SELECT j.name FROM msdb.dbo.sysjobs AS j
INNER JOIN msdb.dbo.sysjobsteps AS s
ON j.job_id = s.job_id
WHERE s.command LIKE @linked_server;
当然，您可能需要先查找同义词：
DECLARE @sql NVARCHAR(MAX) = N'',
@p NVARCHAR(MAX),
@synonym_prefix SYSNAME = N'[linked_server_name].%';
SET @p = N' UNION ALL SELECT N''$db$'', s.name, o.name
FROM $db$.sys.synonyms AS o
INNER JOIN $db$.sys.schemas AS s
ON o.[schema_id] = s.[schema_id]
WHERE s.base_object_name LIKE @spre';
SELECT @sql = @sql + REPLACE(@p, N'$db$', QUOTENAME(name))
FROM sys.databases; -- may want to filter out system dbs, offline, etc
SET @sql = STUFF(@sql, 1, 11, N'') + N';';
EXEC sys.sp_executesql @sql, N'@spre SYSNAME', @synonym_prefix;
然后使用这些同义词名称而不是'linked_server_name'上面的名称。
我使用我开发的这个脚本来帮助我查找链接的服务器引用，但可用于查找多个对象中的任何文本字符串。
/*********************************
Name: Text Searcher
Author: Jonathan Fite
Created: 1/16/2015
Purpose: To enable one to more easily search for objects by an indicated string.
Usage:
- Update the "Where To Search" section to turn on or off various sections.
- Craft an insert statement to populate "@ObjectsToSearchFor" with the text you
want to look for.
- Execute.
NOTE: This works recursively (in a fashion). The first execution gets just what you are
looking for. But if you execute it again without explicitly dropping the "#SearchResults" table
then it will run again, but this time looking for references to the objects it found in the first pass.
This is useful when you are trying to find out what is using a linked server. So you get the name of the
linked server (and it's host name) and run a search on that. It tells you a handful of objects. You then run
it again, but this time looking for those objects (say, in other stored procedures or in SSIS/Jobs).
CAUTION: If you want to use the recursive functionality, you will need to save off the results FIRST.
DROP TABLE #SearchResults
-Linked Server Query (finds all references to linked servers as configured, as well as all variations
that would allow for accessing a remote server without using a linked server.
INSERT INTO @ObjectsToSearchFor
(TextString)
SELECT srvname FROM sys.sysservers WHERE srvname <> @@SERVERNAME
UNION
SELECT datasource FROM sys.sysservers WHERE srvname <> @@SERVERNAME
UNION
SELECT srvnetname FROM sys.sysservers WHERE srvnetname <> @@SERVERNAME
UNION
SELECT 'OPENROWSET'
UNION
SELECT 'OPENQUERY'
UNION
SELECT 'OPENDATASOURCE'
**********************************/
--To hide row counts and make the print statements easier to see.
SET NOCOUNT ON
/** Where To Search **/
DECLARE @SearchSSIS BIT = 1
DECLARE @SearchObjectNames BIT = 1
DECLARE @SearchObjectDefinition BIT = 1
DECLARE @SearchAgentJobs BIT = 1
/** What are you looking for? **/
DECLARE @ObjectsToSearchFor TABLE
(
TextString VARCHAR(200) NULL
)
INSERT INTO @ObjectsToSearchFor
(TextString)
SELECT srvname FROM sys.sysservers WHERE srvname <> @@SERVERNAME
UNION
SELECT datasource FROM sys.sysservers WHERE srvname <> @@SERVERNAME
UNION
SELECT srvnetname FROM sys.sysservers WHERE srvnetname <> @@SERVERNAME
UNION
SELECT 'OPENROWSET'
UNION
SELECT 'OPENQUERY'
UNION
SELECT 'OPENDATASOURCE'
/*************************************************************************************************************************
Shouldn't need to mess with anything below this line.
**************************************************************************************************************************/
/** Handle Recursion on #SearchResults.
Remember to save your data first!
If you don't want recursion, explitly drop #SearchResults between executions.
**/
IF OBJECT_ID('tempdb..#SearchResults') IS NOT NULL
BEGIN
DELETE FROM @ObjectsToSearchFor
--This allows for successive iterations to search for objects which reference objects which reference....
INSERT INTO @ObjectsToSearchFor
(TextString)
SELECT DISTINCT ObjectName
FROM #SearchResults
WHERE LocationFound IN ('sys.sql_modules')
AND ObjectName IS NOT NULL
SET @SearchObjectNames = 0
DROP TABLE #SearchResults
END
CREATE TABLE #SearchResults
(
DatabaseName SYSNAME NULL
, ObjectName SYSNAME NULL
, LocationFound VARCHAR(100) NULL
, MatchedOn VARCHAR(200) NULL
, Misc VARCHAR(100) NULL
)
/** Various declarations to hold results. **/
DECLARE @SearchTerm VARCHAR(200)
DECLARE @DatabaseName SYSNAME
DECLARE @Query NVARCHAR(4000)
-- Loop through search terms.
DECLARE curSearch CURSOR LOCAL STATIC FORWARD_ONLY
FOR SELECT O.TextString
FROM @ObjectsToSearchFor O
OPEN curSearch
FETCH NEXT FROM curSearch
INTO @SearchTerm
WHILE @@FETCH_STATUS = 0
BEGIN
--Begin Searching.
PRINT ('Looking for: ' + @SearchTerm)
/** This will loop over every database, only do it if you need it. **/
IF(@SearchObjectDefinition = 1 OR @SearchObjectNames = 1)
BEGIN
DECLARE curDatabases CURSOR LOCAL STATIC FORWARD_ONLY
FOR SELECT D.name
FROM sys.sysdatabases D
ORDER BY D.name
OPEN curDatabases
FETCH NEXT FROM curDatabases
INTO @DatabaseName
WHILE @@FETCH_STATUS = 0
BEGIN
--Look for object name matching...
IF(@SearchObjectNames = 1)
BEGIN
SET @Query = 'USE ' + QUOTENAME(@DatabaseName) + ';'
+ 'INSERT INTO #SearchResults'
+ ' SELECT DB_NAME()'
+ ', O.name'
+ ', ' + QUOTENAME('sys.objects', '''')
+ ', ' + QUOTENAME(@SearchTerm, '''')
+ ', O.type_desc'
+ ' FROM sys.objects O (NOLOCK)'
+ ' WHERE LOWER(O.name) LIKE ' + QUOTENAME('%' + LOWER(@SearchTerm) + '%', '''')
EXEC sp_executesql @Query
SET @Query = 'USE ' + QUOTENAME(@DatabaseName) + ';'
+ 'INSERT INTO #SearchResults'
+ ' SELECT DB_NAME()'
+ ', C.name'
+ ', ' + QUOTENAME('sys.columns', '''')
+ ', ' + QUOTENAME(@SearchTerm, '''')
+ ', O.name + O.type_desc'
+ ' FROM sys.columns C (NOLOCK) INNER JOIN sys.objects O ON O.[object_id] = C.[object_id]'
+ ' WHERE LOWER(C.name) LIKE ' + QUOTENAME('%' + LOWER(@SearchTerm) + '%', '''')
EXEC sp_executesql @Query
END --Looking for object names.
--Look for definitions.
--Find objects that have the string in question listed, but ignore where the name is what is being searched for.
IF(@SearchObjectDefinition = 1)
BEGIN
SET @Query = 'USE ' + QUOTENAME(@DatabaseName) + ';'
+ 'INSERT INTO #SearchResults'
+ ' SELECT DB_NAME()'
+ ', O.name'
+ ', ' + QUOTENAME('sys.sql_modules', '''')
+ ', ' + QUOTENAME(@SearchTerm, '''')
+ ', O.type_desc'
+ ' FROM sys.sql_modules M (NOLOCK) INNER JOIN sys.objects O ON O.[object_id] = M.[object_id]'
+ ' WHERE LOWER(M.[definition]) LIKE ' + QUOTENAME('%' + LOWER(@SearchTerm) + '%', '''')
+ ' AND NOT(LOWER(O.name) = LOWER(' + QUOTENAME(@SearchTerm, '''') + '))'
EXEC sp_executesql @Query
END --Looking for object definitions.
--Get next database
FETCH NEXT FROM curDatabases
INTO @DatabaseName
END
CLOSE curDatabases
DEALLOCATE curDatabases
END
--Look in SSIS packages.
IF(@SearchSSIS = 1)
BEGIN
;WITH SSISFolders AS
(
SELECT pf.folderid
, pf.parentfolderid
, CAST(pf.foldername AS VARCHAR(MAX)) AS foldername
FROM msdb.dbo.sysssispackagefolders pf (NOLOCK)
WHERE pf.parentfolderid IS NULL
UNION ALL
SELECT pf.folderid
, pf.parentfolderid
, Parent.foldername + '\' + ISNULL(CAST(pf.foldername AS VARCHAR(MAX)), '') AS foldername
FROM msdb.dbo.sysssispackagefolders pf (NOLOCK)
INNER JOIN SSISFolders Parent ON Parent.folderid = pf.parentfolderid
)
INSERT INTO #SearchResults
SELECT NULL
, ISNULL(F.foldername, '') + '\' + CAST(ISNULL(S.name, '') AS VARCHAR(MAX))
, 'msdb.dbo.syssispackages'
, @SearchTerm
, NULL
FROM msdb.dbo.sysssispackages S (NOLOCK)
LEFT OUTER JOIN SSISFolders F (NOLOCK) ON F.folderid = S.folderid
WHERE LOWER(CAST(CAST(CAST(CAST(packagedata AS VARBINARY(MAX)) AS VARCHAR(MAX)) AS XML) AS VARCHAR(MAX))) LIKE ('%' + @SearchTerm + '%')
END
--Look in SQL Agent Jobs
IF(@SearchAgentJobs = 1)
BEGIN
--Job Name
INSERT INTO #SearchResults
SELECT NULL
, J.name
, 'msdb.dbo.sysjobs'
, @SearchTerm
, 'Job Name'
FROM msdb.dbo.sysjobs J (NOLOCK)
WHERE LOWER(J.name) LIKE ('%' + @SearchTerm + '%')
--Job Description
INSERT INTO #SearchResults
SELECT NULL
, J.name
, 'msdb.dbo.sysjobs'
, @SearchTerm
, 'Job Description'
FROM msdb.dbo.sysjobs J (NOLOCK)
WHERE LOWER(J.[description]) LIKE ('%' + @SearchTerm + '%')
--Step Name.
INSERT INTO #SearchResults
SELECT NULL
, (ISNULL(J.name, '') + ' - ' + ISNULL(S.step_name, '') + ' (' + CAST(S.step_id AS VARCHAR(10)) + ')')
, 'msdb.dbo.sysjobsteps'
, @SearchTerm
, 'Step Name'
FROM msdb.dbo.sysjobsteps S (NOLOCK)
INNER JOIN msdb.dbo.sysjobs J (NOLOCK) ON J.job_id = S.job_id
WHERE LOWER(S.step_name) LIKE ('%' + @SearchTerm + '%')
--Step Code.
INSERT INTO #SearchResults
SELECT NULL
, (ISNULL(J.name, '') + ' - ' + ISNULL(S.step_name, '') + ' (' + CAST(S.step_id AS VARCHAR(10)) + ')')
, 'msdb.dbo.sysjobsteps'
, @SearchTerm
, 'Step Code'
FROM msdb.dbo.sysjobsteps S (NOLOCK)
INNER JOIN msdb.dbo.sysjobs J (NOLOCK) ON J.job_id = S.job_id
WHERE LOWER(S.command) LIKE ('%' + @SearchTerm + '%')
END --End Looking at Jobs.
--Get next search term.
FETCH NEXT FROM curSearch
INTO @SearchTerm
END
--Cleanup.
CLOSE curSearch
DEALLOCATE curSearch
/***************** Display Output **********************************/
--Display search terms.
SELECT O.TextString
, COUNT(S.MatchedOn) AS MatchCount
FROM @ObjectsToSearchFor O
LEFT OUTER JOIN #SearchResults S ON S.MatchedOn = O.TextString
GROUP BY O.TextString
--Display search results.
SELECT DISTINCT * FROM #SearchResults
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