简要记录背景:
1. 数据库由于硬盘问题完整性被破坏了,使用dbcc checkdb完全没有效果
2. 经检查发现,有两张使用最频繁的表无法进行任何操作,其他表正常
3. 通过某数据库修复工具,可以查看到那两张坏掉的表中的数据【估计还是不全】,但由于没有授权,只能查看,数据导不出来
在此基础上,我们按如下办法来尽可能对数据库进行修复,修复办法如下:
1. 想办法重建立一个新库,除了两张坏掉的表,其他表以复制的形式重建
由于坏的表无法删除,导致整个库都无法使用,我们只能将好的数据进行转移,重建数据库。
我们在将表结构建立好后,使用如下脚本,生成了库中所有需要导入的表的记录
use Charge DECLARE @TableName varchar(255); DECLARE @ColumnName varchar(255); DECLARE @ColumnNames varchar(2550); declare @currentDbName varchar(255) declare @sourceDbName varchar(255) set @currentDbName = 'newdb' set @sourceDbName = 'brokendb' DECLARE Table_Cursor CURSOR FOR SELECT [name] FROM sysobjects WHERE xtype='U'; OPEN Table_Cursor; FETCH NEXT FROM Table_Cursor INTO @TableName; WHILE(@@FETCH_STATUS=0) BEGIN if(@TableName <> 'Tbl_Customer' and @TableName <> 'Tbl_Company' ) begin print '/*---------------------------------------------------------------' print @TableName print '---------------------------------------------------------------*/' begin set @ColumnNames = '' DECLARE Column_Cursor CURSOR FOR select name from syscolumns where id=object_id(@TableName) OPEN Column_Cursor; FETCH NEXT FROM Column_Cursor INTO @ColumnName; WHILE(@@FETCH_STATUS=0) begin set @ColumnNames = @ColumnNames + '[' + @ColumnName + ']' + ',' FETCH NEXT FROM Column_Cursor INTO @ColumnName; end CLOSE Column_Cursor DEALLOCATE Column_Cursor; end set @ColumnNames = left(@ColumnNames, len(@ColumnNames) -1) print 'use ' + @currentDbName print 'begin try' print 'Set IDENTITY_INSERT ' + @TableName + ' ON' print 'truncate table ' + @TableName print 'INSERT INTO ['+ @currentDbName +'].[dbo].[' + @TableName + '](' + @ColumnNames + ') select ' + @ColumnNames + ' from [' + @sourceDbName + '].[dbo].[' + @TableName + ']' print 'end try' print 'begin catch' print 'print ''' + @TableName + ' run error''' print 'end catch' print 'begin try' print 'Set IDENTITY_INSERT ' + @TableName + ' OFF' print 'end try' print 'begin catch' print 'end catch' end FETCH NEXT FROM Table_Cursor INTO @TableName; END CLOSE Table_Cursor; DEALLOCATE Table_Cursor; GO
2. 执行上述脚本,生成了可以导入整个库中想要的表的数据,自动生成的脚本如下:
/*--------------------------------------------------------------- Tbl_Order ---------------------------------------------------------------*/ use newdb begin try Set IDENTITY_INSERT Tbl_Order ON truncate table Tbl_Order INSERT INTO [newdb].[dbo].[Tbl_Order]([OrderId],[EuId],[CardId]) select [OrderId],[EuId],[CardId] from [brokendb].[dbo].[Tbl_Order] end try begin catch print 'Tbl_Order run error' end catch begin try Set IDENTITY_INSERT Tbl_Order OFF end try begin catch end catch /*--------------------------------------------------------------- Tbl_CancelCharge ---------------------------------------------------------------*/ use newdb begin try Set IDENTITY_INSERT Tbl_CancelCharge ON truncate table Tbl_CancelCharge INSERT INTO [newdb].[dbo].[Tbl_CancelCharge]([CancelId],[EuId],[ECharacterID],[Type],[Num],[CreateDate]) select [CancelId],[EuId],[ECharacterID],[Type],[Num],[CreateDate] from [brokendb].[dbo].[Tbl_CancelCharge] end try begin catch print 'Tbl_CancelCharge run error' end catch begin try Set IDENTITY_INSERT Tbl_CancelCharge OFF end try begin catch end catch
3. 通过SPY++监视发现,原来第三方的数据库修复软件是通过系统的 SysListView32 来显示的数据库数据,这样我们就可以利用读取外部进程控件数据的办法,将其能读取的数据读取出来,获取其窗口句柄及读取行列数据的代码分别如下:
/************************************************************************/ /* */ /************************************************************************/ HWND CWindowFind::GetChildWindow(HWND hwnd,int iIndex) { HWND hwndChind = NULL; CString strTemp = ""; int i = 1; hwndChind = GetWindow(hwnd,GW_CHILD); CWnd *pWnd = CWnd::FromHandle(hwndChind); while (pWnd) { hwndChind = pWnd->GetSafeHwnd(); if (i == iIndex) { return hwndChind; } pWnd = pWnd->GetNextWindow(GW_HWNDNEXT); i++; } return hwndChind; }接下来找到列表句柄及获取行数:
HWND hwndParent = ::FindWindow(NULL, "MSSQL数据库修复大师 专业版"); hwndParent = gl_find.GetChildWindow(hwndParent, 1); hwndParent = gl_find.GetChildWindow(hwndParent, 2); HWND hwnd = gl_find.GetChildWindow(hwndParent, 1); int nTotalCount = (int) ::SendMessage(hwnd, LVM_GETITEMCOUNT, 0, 0L);
CString CCListCtrlExportDlg::GetListItemText(HWND hwnd,int iItem,int iSubItem) { LVITEM lvitem, *plvitem; char ItemBuf[512],*pItem; DWORD PID; HANDLE hProcess; CString strRet = ""; GetWindowThreadProcessId(hwnd, &PID); hProcess=OpenProcess(PROCESS_ALL_ACCESS,false,PID); if (!hProcess) { return ""; } plvitem=(LVITEM*)VirtualAllocEx(hProcess, NULL, sizeof(LVITEM), MEM_COMMIT, PAGE_READWRITE); pItem=(char*)VirtualAllocEx(hProcess, NULL, 512, MEM_COMMIT, PAGE_READWRITE); if ((!plvitem)||(!pItem)) { CloseHandle(hProcess); return ""; } else { lvitem.cchTextMax=512; lvitem.iSubItem=iSubItem; lvitem.pszText=pItem; WriteProcessMemory(hProcess, plvitem, &lvitem, sizeof(LVITEM), NULL); ::SendMessage(hwnd,LVM_GETITEMTEXT, (WPARAM)iItem,(LPARAM)plvitem); ReadProcessMemory(hProcess, pItem, ItemBuf, 512, NULL); strRet.Format("%s",ItemBuf); } VirtualFreeEx(hProcess, plvitem, 0, MEM_RELEASE); VirtualFreeEx(hProcess, pItem, 0, MEM_RELEASE); CloseHandle(hProcess); return strRet; }这样每一行每一列的值已经都可以拿到了,接下来只需要将读取到的数据组合成相应的SQL脚本,再到查询分析器中执行,即可将丢失的数据插入到数据库中。【这里我导出成文本文件,再导入到SQL SERVER中时,遇到一些时间格式问题,所以直接使用SQL】
通过以上步骤,一个完整的数据库已经得到复制,并且将丢失的部分数据找回。【有些数据还是丢失了,在第三方软件上也没有显示】