{"id":13591390,"url":"https://github.com/ap0405140/MSSQLLogAnalyzer","last_synced_at":"2025-04-08T17:31:30.240Z","repository":{"id":53086076,"uuid":"245790425","full_name":"ap0405140/MSSQLLogAnalyzer","owner":"ap0405140","description":"Microsoft SQL Server Log Analyzer. DBLOG.DatabaseLogAnalyzer can read the SQL Server transaction logs online, and return RedoSQL and UndoSQL for every transaction. It base on SQL Server fn_dblog() function and develop some extension.","archived":false,"fork":false,"pushed_at":"2025-02-12T06:31:35.000Z","size":448,"stargazers_count":150,"open_issues_count":8,"forks_count":40,"subscribers_count":8,"default_branch":"master","last_synced_at":"2025-03-28T20:07:28.220Z","etag":null,"topics":["databaselog","sqlserver"],"latest_commit_sha":null,"homepage":"","language":"C#","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/ap0405140.png","metadata":{"files":{"readme":"Readme.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2020-03-08T10:00:56.000Z","updated_at":"2025-03-28T18:34:41.000Z","dependencies_parsed_at":"2024-05-08T03:36:48.435Z","dependency_job_id":null,"html_url":"https://github.com/ap0405140/MSSQLLogAnalyzer","commit_stats":{"total_commits":74,"total_committers":3,"mean_commits":"24.666666666666668","dds":0.2567567567567568,"last_synced_commit":"4c7f35015f2079255c045d1c507c1c13f60df30e"},"previous_names":[],"tags_count":1,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/ap0405140%2FMSSQLLogAnalyzer","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/ap0405140%2FMSSQLLogAnalyzer/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/ap0405140%2FMSSQLLogAnalyzer/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/ap0405140%2FMSSQLLogAnalyzer/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/ap0405140","download_url":"https://codeload.github.com/ap0405140/MSSQLLogAnalyzer/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":247249525,"owners_count":20908212,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["databaselog","sqlserver"],"created_at":"2024-08-01T16:00:56.972Z","updated_at":"2025-04-08T17:31:29.844Z","avatar_url":"https://github.com/ap0405140.png","language":"C#","funding_links":[],"categories":["C#","C\\#"],"sub_categories":[],"readme":"## DBLOG.DatabaseLogAnalyzer can read the SQL Server transaction logs online, and return RedoSQL and UndoSQL for every transaction. It base on SQL Server fn_dblog() function and develop some extension.\n\n#### below is a demo:\nConnect to SQL Server, create a test table dbo.OrderDetail, and run some DML sql on this table.\n~~~~sql\n-- create table\ncreate table dbo.OrderDetail\n(OrderID int not null,\n ItemID int not null,\n ItemNumber varchar(10),\n QTY int,\n Price decimal(8,2),\n ADate date,\n AUser char(20),\n UDate datetime,\n UUser varchar(20)\n constraint pk_OrderDetail primary key(OrderID,ItemID)\n)\n\n-- transaction1: insert 3 rows\ninsert into dbo.OrderDetail(OrderID,ItemID,ItemNumber,QTY,Price,ADate,AUser,UDate,UUser)\n  select 1001,1,'D001',100,45.62,'2015-01-02','Xh6','2015-01-03 20:15:18','Lx4' union all\n  select 1001,2,'Z001_2',150,180,'2015-01-02','cx5','2015-01-08 02:45:32','Yx3' union all\n  select 1002,1,'Z001_2',300,182.07,'2015-12-12','CL1','2015-12-18 02:45:32','LY6'\n\n-- transaction2: update 1 row\nupdate dbo.OrderDetail set QTY=999 where OrderID=1001 and ItemID=1\n\n-- transaction3: update 3 rows\nupdate dbo.OrderDetail set ItemNumber='!@#$%'\n\n-- transaction4: delete all rows\ndelete  from dbo.OrderDetail\n~~~~\nAfter run, there is no records in test table.\n~~~~sql\n-- query result\n select * from dbo.OrderDetail\n~~~~\n![pic1](https://img-blog.csdn.net/20160114160814768?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast \"\")\n\n**Right now, we can use this tool to recover data online(no need to restore database and logs).**\n**Please download zip file in Releases, and extract files to a folder.**\n\n**step1: Execute MSSQLLogAnalyzer.exe.**\n\n**step2: Modify [ConnectionString], change it for your environment.**\n\n\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;**Modify [StartTime] and [EndTime] to what time range need to read logs.**\n\n\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;\u0026nbsp;**Modify [TableName], It can  be blank, when blank means read all table logs.**\n\n**step3: Click [Readlog] button, wait for analysis results. below screenshot is the run result.**\n\n![pic2](https://img-blog.csdnimg.cn/20200321113032844.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FwMDQwNTE0MA==,size_16,color_FFFFFF,t_70 \"\")\n**After run finished, It returned some RedoSQL and UndoSQL for every transaction, For recovery,  we can use UndoSQL to recover all operations (execute from the back forward).**\n~~~~sql\n-- recover transaction4(delete all rows)\ninsert into dbo.OrderDetail([OrderID],[ItemID],[ItemNumber],[QTY],[Price],[ADate],[AUser],[UDate],[UUser]) values(1002, 1, '!@#$%', 300, 182.07, '2015-12-12', 'CL1', '2015-12-18 02:45:32.000', 'LY6'); \ninsert into dbo.OrderDetail([OrderID],[ItemID],[ItemNumber],[QTY],[Price],[ADate],[AUser],[UDate],[UUser]) values(1001, 2, '!@#$%', 150, 180.00, '2015-01-02', 'cx5', '2015-01-08 02:45:32.000', 'Yx3'); \ninsert into dbo.OrderDetail([OrderID],[ItemID],[ItemNumber],[QTY],[Price],[ADate],[AUser],[UDate],[UUser]) values(1001, 1, '!@#$%', 999, 45.62, '2015-01-02', 'Xh6', '2015-01-03 20:15:18.000', 'Lx4'); \n \n-- recover transaction3(update 3 rows)\nupdate dbo.OrderDetail set [ItemNumber]='Z001_2' where [OrderID]=1002 and [ItemID]=1\nupdate dbo.OrderDetail set [ItemNumber]='Z001_2' where [OrderID]=1001 and [ItemID]=2\nupdate dbo.OrderDetail set [ItemNumber]='D001' where [OrderID]=1001 and [ItemID]=1\n \n-- recover transaction2(update 1 row)\nupdate dbo.OrderDetail set [QTY]=100 where [OrderID]=1001 and [ItemID]=1\n\n-- query recovery result\n select * from dbo.OrderDetail\n~~~~\n![pic3](https://img-blog.csdn.net/20160114161619096?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQv/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/SouthEast \"\")\n\u003cbr/\u003e\n**Recovery finished!**\n\n----\n#### Some Tips:\n#### 1. The SQL Server to be analyzed needs 2008 or later version.\n#### 2. Target Database Recovery model must be 'Full'.\n#### 3. This module only analyzes for DML transaction.\n#### 4. For develop, please install Visual Studio 2017 or later version and .NET Framework 4.8.\n#### 5. Please contact me when have any question: ap0405140@163.com\n----\n\n#### SQLCLR use example:\nDeployment to SQLServer with SQLCLR, then we can use a SQL Function to readlog on SQL Server Management Studio.\n~~~~sql\nuse master\n\n-- enable clr\nexec sys.sp_configure 'clr enabled'\n\nexec sys.sp_configure 'clr enabled',1\n\nreconfigure\n\n-- set trustworthy on\nalter database [DatabaseName] set trustworthy on\n\nuse [DatabaseName]\n\n-- function dbo.DBAReadLog\nif exists(select 1 from sys.objects where name=N'DBAReadLog')\n   drop function dbo.DBAReadLog\n\nif exists(select 1 from sys.assemblies where name=N'FCLR')\n   drop assembly FCLR\n\ncreate assembly FCLR \n from 'D:\\MSSQLLogAnalyzer\\FCLR\\bin\\Debug\\FCLR.dll'\n with permission_set=unsafe\n\nalter assembly FCLR add file from 'D:\\MSSQLLogAnalyzer\\FCLR\\bin\\Debug\\FCLR.pdb';\n\ncreate function dbo.DBAReadLog(@connectionstring nvarchar(max),\n                               @dt0 nvarchar(max),\n                               @dt1 nvarchar(max),\n                               @obj nvarchar(max))\nreturns table(LSN nvarchar(max),Type nvarchar(max),TransactionID nvarchar(max),BeginTime nvarchar(max),EndTime nvarchar(max),ObjectName nvarchar(max),Operation nvarchar(max),RedoSQL nvarchar(max),UndoSQL nvarchar(max),Message nvarchar(max))\nas external name FCLR.UserDefinedFunctions.DBAReadLog\n\n-- read log\nselect * \nfrom dbo.DBAReadLog(N'server=[ServerName];database=[DatabaseName];uid=[LoginName];pwd=[Password];Connection Timeout=5;Integrated Security=false;',  -- Database connection string\n                    N'2020/11/23 10:00:00',  --StartTime, example: 2020/11/23 10:00:00\n                    N'2020/11/23 12:01:00',  --EndTime, example: 2020/11/23 12:01:00\n                    null) t  --TableName, Need include schema name(like dbo.Table1), When blank or null means query all tables logs.\norder by LSN\n~~~~\n----\n\n#### DBLOG.dll use example:\nstep1: Start Visual Studio 2017, create a new project.\n\nstep2: Add reference DBLOG.dll to current project.\n\nstep3: At cs file header, add \"using DBLOG;\"\n\nstep4: Call DatabaseLogAnalyzer.ReadLog() for read logs.\n\n```csharp\n string ConnectionString, StartTime, EndTime, TableName;\n DatabaseLogAnalyzer dbla;\n DatabaseLog[] logs;\n\n //connection string: Please change below connection string for your environment.\n ConnectionString = \"server=[ServerName];database=[DatabaseName];uid=[LoginName];pwd=[Password];Connection Timeout=5;Integrated Security=false;\";\n //start time for analyze, format: yyyy-MM-dd HH:mm:ss\n StartTime = \"2020-03-18 10:01:02\"; \n //end time for analyze, format: yyyy-MM-dd HH:mm:ss\n EndTime = \"2020-03-18 10:02:02\"; \n //table name: Need include schema name(like dbo.Table1), When blank means query all tables 's logs, you can change it for need.\n TableName = \"\"; \n\n  // Initializes a new instance of the DBLOG.DatabaseLogAnalyzer class.\n  dbla = new DatabaseLogAnalyzer(ConnectionString);  \n  // read logs, return a DatabaseLog array, include below properties:LSN,TransactionID,BeginTime,EndTime,ObjectName,Operation,RedoSQL,UndoSQL.\n  logs = dbla.ReadLog(StartTime, EndTime, TableName); \n```\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fap0405140%2FMSSQLLogAnalyzer","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fap0405140%2FMSSQLLogAnalyzer","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fap0405140%2FMSSQLLogAnalyzer/lists"}