SQL Server：在所有表中搜索特定的GUID

Question

我遇到了清理某些數據的需求，並且需要在SQL Server°中找到一些特殊的指導（即uniqueidentifiers ）。

我想出了一個存儲過程，該存儲過程對當前數據庫中每個表的每個uniqueidentifier列進行SELECT ，並在找到guid時返回結果集。

它使用INFORMATION_SCHEMA視圖在所有基本表 （與視圖相對）中查找所有uniqueidentifier列。 對於每個列，它都會發出選擇，並返回表的名稱和找到該表的列。

CREATE PROCEDURE dbo.FindGUID @searchValue uniqueidentifier AS
/*
    Search all tables in the database for a guid

      6/9/2009: Removed the IF EXISTS to double hit the database
*/

--DECLARE @searchValue uniqueidentifier
--SET @searchValue = '{2A6814B9-8261-452D-A144-13264433864E}'

DECLARE abc CURSOR FOR
    SELECT 
        c.TABLE_NAME, c.COLUMN_NAME
    FROM INFORMATION_SCHEMA.Columns c
        INNER JOIN INFORMATION_SCHEMA.Tables t
        ON c.TABLE_NAME = t.TABLE_NAME
        AND t.TABLE_TYPE = 'BASE TABLE'
    WHERE DATA_TYPE = 'uniqueidentifier'

DECLARE @tableName varchar(200)
DECLARE @columnName varchar(200)
DECLARE @szQuery varchar(8000)

OPEN ABC

FETCH NEXT FROM abc INTO @tableName, @columnName
WHILE (@@FETCH_STATUS = 0)
BEGIN
    SET @szQuery = 
        'SELECT '''+@tableName+''' AS TheTable, '''+@columnName+''' AS TheColumn '+
        'FROM '+@tableName+' '+
        'WHERE '+@columnName+' = '''+CAST(@searchValue AS varchar(50))+''''

    PRINT 'Searching '+@tableName+'.'+@columnName+'..'
    PRINT @szQuery
    EXEC (@szQuery)

    FETCH NEXT FROM abc INTO @tableName, @columnName
END

CLOSE abc
DEALLOCATE abc  

---

我的問題是：

問題1
任何人都可以想出一種方法來更改它，以執行與OR相同的表中多個唯一標識符列的搜索，而不是單獨的查詢

即

SELECT ... FROM Prices WHERE BookGUID = '{...}'
SELECT ... FROM Prices WHERE AuthorGUID = '{...}'
SELECT ... FROM Prices WHERE PublisherGUID = '{...}'
SELECT ... FROM Prices WHERE StoreGUID = '{...}'

會成為：

SELECT ... 
FROM Prices 
WHERE BookGUID = '{...}'
OR AuthorGUID = '{...}'
OR PublisherGUID = '{...}'
OR StoreGUID = '{...}'

我嘗試在游標中使用游標，但FETCH_STATUS發生沖突。

問題2有人能想到更好的方法嗎？

---

腳注：

°SQL Server 2000

•受到在關系數據庫中使用唯一標識符的約束。

Answer 1

您可以將EXEC推遲到光標循環完成之前。 然后，只需在循環內跟蹤表名，如果相同，則添加一個OR，否則結束SELECT並開始一個新的。

DECLARE @lasttable varchar(255);
SET @lasttable='';
FETCH NEXT FROM abc INTO @tableName, @columnName;
WHILE (@@FETCH_STATUS = 0)
BEGIN
   IF(@lasttable=@tablename) BEGIN
       SET @szQuery = @szQuery + ' OR [' + @columnName + ']=''' + CAST(@searchValue AS varchar(50)) + '''';
   END ELSE BEGIN
       SET @lasttable = @tablename;
       SET @szQuery = @szQuery + 
         'SELECT '''+@tableName+''' AS TheTable, '''+@columnName+''' AS TheColumn '+
         'FROM '+@tableName+' '+
         'WHERE '+@columnName+' = '''+CAST(@searchValue AS varchar(50))+''''
   END
   FETCH NEXT FROM abc INTO @tableName, @columnName;
END
PRINT @szQuery;
EXEC (@szQuery);

您還可以創建存儲過程來構建一個VIEW，該VIEW對所有表和uniqueidentifier字段執行UNION ALL。 具有這樣的架構的東西：

CREATE VIEW all_uuids AS (
    SELECT 'prices' AS tablename, 'BookGUID' as fieldname, ID as primarykey, BookGUID AS guid FROM prices
    UNION ALL SELECT 'prices', 'AuthorGUID', ID, AuthorGUID FROM prices
    UNION ALL SELECT 'othertable', 'otherfield', ID, otherfield FROM othertable
    )

然后，您只需要在此可重用的VIEW上執行單個SELECT語句即可獲取所有匹配的GUID。 要在單個表中搜索，請使用相關子查詢，例如：

SELECT * FROM prices WHERE EXISTS (SELECT null FROM all_uuids u WHERE u.primarykey=prices.id AND u.guid=@searchfor AND u.tablename='prices')

這將搜索價格表中的所有GUID字段。 SQL Server非常聰明，不會瀏覽其他表，它使用現有表的索引。

通過重新使用單個視圖，您只需在更改模式時就遍歷information_schema，而不必與每個查詢一起遍歷，並且視圖的結果比存儲過程的結果更容易連接。

---

回答

原始海報的最終解決方案，基於以下答案：

CREATE PROCEDURE dbo.FindGUID @searchValue uniqueidentifier AS

/*
    Search all tables in the database for a guid

    Revision History
    6/9/2009: Initally created
    6/10/2009: Build or clause of multiple columns on one table
*/

--DECLARE @searchValue uniqueidentifier
--SET @searchValue = '{2A6814B9-8261-452D-A144-13264433864E}'

DECLARE abc CURSOR FOR
    SELECT 
        c.TABLE_SCHEMA, c.TABLE_NAME, c.COLUMN_NAME
    FROM INFORMATION_SCHEMA.Columns c
        INNER JOIN INFORMATION_SCHEMA.Tables t
        ON c.TABLE_NAME = t.TABLE_NAME
        AND t.TABLE_TYPE = 'BASE TABLE'
    WHERE DATA_TYPE = 'uniqueidentifier'

DECLARE @tableSchema varchar(200)
DECLARE @tableName varchar(200)
DECLARE @columnName varchar(200)
DECLARE @szQuery varchar(8000)
SET @szQuery = ''

DECLARE @lasttable varchar(255);
SET @lasttable='';

OPEN ABC

FETCH NEXT FROM abc INTO @tableSchema, @tableName, @columnName;
WHILE (@@FETCH_STATUS = 0)
BEGIN
   IF(@lasttable=@tablename) 
   BEGIN
      SET @szQuery = @szQuery + ' OR [' + @columnName + ']=''' + CAST(@searchValue AS varchar(50)) + '''';
   END 
   ELSE 
   BEGIN
       SET @lasttable = @tablename;

       IF @szQuery <> '' 
       BEGIN
          PRINT @szQuery
          EXEC ('IF EXISTS (' + @szQuery + ') BEGIN ' + @szQuery + ' END');
       END

       SET @szQuery = 
         'SELECT '''+@tableSchema+'.'+@tableName+''' AS TheTable, '''+@columnName+''' AS TheColumn '+
         'FROM '+@tableName+' '+
         'WHERE '+@columnName+' = '''+CAST(@searchValue AS varchar(50))+''''
   END
   FETCH NEXT FROM abc INTO @tableSchema, @tableName, @columnName;
END

CLOSE abc
DEALLOCATE abc

IF @szQuery <> '' 
BEGIN
    PRINT @szQuery
    EXEC ('IF EXISTS (' + @szQuery + ') BEGIN ' + @szQuery + ' END');
END
GO

Answer 2

您可以將所有文件包裝到單個SELECT中，然后一次搜索所有表：

ALTER PROCEDURE dbo.FindGUID @searchValue uniqueidentifier AS
BEGIN
SET NOCOUNT ON;
DECLARE @sql NVARCHAR(MAX);
WITH cte_all_tables(SQL) AS (
    SELECT N'SELECT ''' + QUOTENAME(t.TABLE_SCHEMA) + '.' +QUOTENAME(t.TABLE_NAME) + 
        + N''' FROM ' + QUOTENAME(t.TABLE_SCHEMA) + '.' +QUOTENAME(t.TABLE_NAME)
        + N' WHERE ' +
        (
            SELECT QUOTENAME(c.COLUMN_NAME) + N'= @searchValue OR '
            FROM INFORMATION_SCHEMA.Columns c
            WHERE c.TABLE_NAME = t.TABLE_NAME
                AND c.TABLE_SCHEMA = t.TABLE_SCHEMA
                AND c.DATA_TYPE = 'uniqueidentifier'
            FOR XML PATH('')
        ) + N' 0=1 ' 
   FROM INFORMATION_SCHEMA.Columns c
        INNER JOIN INFORMATION_SCHEMA.Tables t
        ON c.TABLE_NAME = t.TABLE_NAME
        AND t.TABLE_SCHEMA = c.TABLE_SCHEMA
        AND t.TABLE_TYPE = 'BASE TABLE'
    WHERE DATA_TYPE = 'uniqueidentifier')
SELECT @sql = (SELECT [SQL] + N' UNION ALL ' FROM cte_all_tables
FOR XML PATH('')) + N' SELECT NULL WHERE 0=1';
PRINT @SQL;
exec sp_executesql @sql, N'@searchValue uniqueidentifier', @searchValue;
END

我使用了邏輯刪除器，例如'OR 0 = 1'，甚至使用了整個UNION，但這只是因為我太懶了，無法從構建的串聯字符串中修剪結尾。

Answer 3

這是免費使用游標的SQL 2000解決方案：

declare @searchvalue uniqueidentifier
set @searchValue = '{2A6814B9-8261-452D-A144-13264433864E}'

if object_id('tempdb..#results') is not null drop table #results
create table #results (TableSchema sysname, TableName sysname)

declare @sql nvarchar(4000)

declare @cursor1 cursor
declare @tablename sysname
declare @tableschema sysname

declare @cursor2 cursor
declare @columnname sysname
declare @searchFields nvarchar(4000)

set @cursor1 = cursor for
  select t.TABLE_SCHEMA, t.TABLE_NAME
  from INFORMATION_SCHEMA.Tables t
  where t.TABLE_TYPE = 'BASE TABLE'
    and exists (
      select * from INFORMATION_SCHEMA.Columns c
      where c.TABLE_NAME = t.TABLE_NAME
        and c.TABLE_SCHEMA = t.TABLE_SCHEMA
        and c.DATA_TYPE = 'uniqueidentifier'
      )

open @cursor1
while 1=1 begin
  fetch next from @cursor1 into @tableschema, @tablename
  if @@fetch_status <> 0 break

  set @searchFields = ''
  set @cursor2 = cursor for 
    select c.COLUMN_NAME
    from INFORMATION_SCHEMA.Columns c
    where c.TABLE_NAME = @tablename
      and c.TABLE_SCHEMA = @tableschema
      and c.DATA_TYPE = 'uniqueidentifier'

  open @cursor2
  while 1=1 begin
    fetch next from @cursor2 into @columnname
    if @@fetch_status <> 0 break
    set @searchFields = @searchFields + ', ' + quotename(@columnname)
  end      

  set @searchFields = substring(@searchFields,3,len(@searchFields))
  set @sql = ' insert #results'
           + ' select '''+@tableschema+''','''+@tablename+''''
           + ' from '+quotename(@tableschema)+'.'+quotename(@tablename)
           + ' where @searchValue in ('+@searchFields+')'

  print @sql
  exec sp_executesql @sql, N'@searchValue uniqueidentifier', @searchValue
end

select * from #results

這是基於Remus解決方案的SQL 2005解決方案，其中具有臨時表以實現更好的擴展：

DECLARE @searchValue uniqueidentifier
SET @searchValue = '{2A6814B9-8261-452D-A144-13264433864E}'

IF OBJECT_ID('tempdb..#results') IS NOT NULL DROP TABLE #results
CREATE TABLE #results (TableSchema SYSNAME, TableName SYSNAME);
DECLARE @sql NVARCHAR(MAX);
WITH cte_all_tables(SQL) AS (
    SELECT
          N' INSERT #results (TableSchema, TableName)'
        + N' SELECT ''' + t.TABLE_SCHEMA + ''', ''' + t.TABLE_NAME + N'''' 
        + N' FROM ' + QUOTENAME(t.TABLE_SCHEMA) + '.' +QUOTENAME(t.TABLE_NAME)
        + N' WHERE ' +
        (
                SELECT QUOTENAME(c.COLUMN_NAME) + N' = @searchValue OR '
                FROM INFORMATION_SCHEMA.Columns c
                WHERE c.TABLE_NAME = t.TABLE_NAME
                        AND c.TABLE_SCHEMA = t.TABLE_SCHEMA
                        AND c.DATA_TYPE = 'uniqueidentifier'
                FOR XML PATH('')
        ) + N'0=1'
   FROM INFORMATION_SCHEMA.Columns c
        INNER JOIN INFORMATION_SCHEMA.Tables t
        ON c.TABLE_NAME = t.TABLE_NAME
        AND t.TABLE_SCHEMA = c.TABLE_SCHEMA
        AND t.TABLE_TYPE = 'BASE TABLE'
    WHERE DATA_TYPE = 'uniqueidentifier')
SELECT @sql = (SELECT [SQL]+nchar(10) FROM cte_all_tables FOR XML PATH(''));

PRINT @SQL;
exec sp_executesql @sql, N'@searchValue uniqueidentifier', @searchValue;
SELECT * FROM #results

Answer 4

看起來有點像正在進行的工程……。您說過，您只需要“找到一些特殊的指導”即可。 導出整個數據庫，然后在notepad ++中打開它並搜索所需的GUID可能會更容易。 然后，您將看到那時的整行數據，等等。

您可以在此處閱讀有關將數據庫導出到文本文件的SQL Server發布向導的信息。

Answer 5

聽起來您基本上是想將列列表連接到動態sql中。 mssql中沒有一流的concat函數，您可以編寫自己的CLR udf來執行此操作，但我不喜歡這種解決方案。 檢查此問題以獲取一些mssql concat解決方案。