undo

How to uncommit my last commit in Git [duplicate]

由 你。 提交于 2019-12-17 17:18:01
问题 This question already has answers here : How do I undo the most recent local commits in Git? (81 answers) Closed 3 years ago . How can I uncommit my last commit in git? Is it git reset --hard HEAD or git reset --hard HEAD^ ? 回答1: If you aren't totally sure what you mean by "uncommit" and don't know if you want to use git reset , please see "Revert to a previous Git commit". If you're trying to understand git reset better, please see "Can you explain what "git reset" does in plain English?".

Is there any way to undo the effects of “git revert head”?

由 China☆狼群 提交于 2019-12-17 10:32:55
问题 I've accidentally run the command against the wrong branch in my repository - is there a way to undo this change? 回答1: git revert just creates a new commit -- you can "remove" it with git reset --hard HEAD^ (be more careful with it, though!) 回答2: The command git revert just creates a commit that undoes another. You should be able to run git revert HEAD again and it'll undo your previous undo and add another commit for that. Or you could do git reset --hard HEAD~ . But be careful with that

Is there any way to undo the effects of “git revert head”?

由 有些话、适合烂在心里 提交于 2019-12-17 10:32:42
问题 I've accidentally run the command against the wrong branch in my repository - is there a way to undo this change? 回答1: git revert just creates a new commit -- you can "remove" it with git reset --hard HEAD^ (be more careful with it, though!) 回答2: The command git revert just creates a commit that undoes another. You should be able to run git revert HEAD again and it'll undo your previous undo and add another commit for that. Or you could do git reset --hard HEAD~ . But be careful with that

How to undo a git pull?

由 社会主义新天地 提交于 2019-12-17 10:07:15
问题 I would like to undo my git pull on account of unwanted commits on the remote origin, but I don't know to which revision I have to reset back to. How can I just go back to the state before I did the git pull on the remote origin? 回答1: Or to make it more explicit than the other answer: git pull whoops? git reset --keep HEAD@{1} Versions of git older than 1.7.1 do not have --keep . If you use such version, you could use --hard - but that is a dangerous operation because it loses any local

SRDC - ORA-1555 during Export: Checklist of Evidence to Supply (Doc ID 1682706.1)

由 旧巷老猫 提交于 2019-12-17 04:27:35
SRDC - ORA-1555 during Export: Checklist of Evidence to Supply (Doc ID 1682706.1) Action Plan 1. Execute srdc_db_undo_1555-1.sql as sysdba and collect the spool output. 以sysdba身份执行 --srdc_db_undo_1555-1.sql REM srdc_db_undo_1555-1.sql REM collect collect Undo parameters and Segments details. define SRDCNAME='DB_Undo_1555-1' set pagesize 200 verify off sqlprompt "" term off entmap off echo off set markup html on spool on COLUMN SRDCSPOOLNAME NOPRINT NEW_VALUE SRDCSPOOLNAME select 'SRDC_'||upper('&&SRDCNAME')||'_'||upper(instance_name)||'_'|| to_char(sysdate,'YYYYMMDD_HH24MISS') SRDCSPOOLNAME

Design Pattern for Undo Engine

由 瘦欲@ 提交于 2019-12-17 02:39:38
问题 I'm writing a structural modeling tool for a civil enginering application. I have one huge model class representing the entire building, which include collections of nodes, line elements, loads, etc. which are also custom classes. I have already coded an undo engine which saves a deep-copy after each modification to the model. Now I started thinking if I could have coded differently. Instead of saving the deep-copies, I could perhaps save a list of each modifier action with a corresponding

InnoDB——锁、事务和复制

由 两盒软妹~` 提交于 2019-12-17 02:14:55
锁 数据库系统使用锁是为了支持对共享资源进行并发访问，提供数据的完整性和一致性。 InnoDB存储引擎中的锁 共享锁（S Lock），允许事务读一行数据 排他锁（X Lock），允许事务删除或更新一行数据 兼容性： S与S可以兼容 X不与任何锁兼容 InnoDB支持多粒度锁定，也就是允许行级和表级的锁同时存在。实现方式为通过意向锁（Intention Lock）：如果需要对最细粒度进行加锁，需要在上层粒度加意向锁。 具体举例，如果需要对行加X锁，需要对表、页依次加IX锁。当意向锁遇到等待时，必须等待结束后才能继续对下级加锁。如准备加对一行有S锁的行加S锁，行记录因为原来就有S锁，所以表和页都已经存在了IS锁，首先新的IS锁加在表上，因为IS、IS锁兼容，可以加上；然后再看页锁，同样IS、IS兼容，可以加上；最后看行锁IS与S兼容，那么行记录可以加上S锁。对同样这行有S锁的行加X锁，先加表IX锁，IX与IS兼容，可以加上，页同样，最后IX锁与行记录上的S锁不兼容，因此要等待S锁释放后才能加上X锁。 一致性非锁定读 一致性非锁定读（consistent nonlocking read）是指InnoDB存储引擎通过行多版本控制（multi version）的方式来读取当前执行时间数据库中行的数据。在行记录正在执行DELETE或UPDATE时执行读操作，不会等待锁释放

Script:收集UNDO诊断信息

由 房东的猫 提交于 2019-12-16 23:47:21
以下脚本可以用于收集Automatic Undo Management的必要诊断信息，以sysdba身份运行: spool Undo_Diag.out ttitle off set pages 999 set lines 150 set verify off set termout off set trimout on set trimspool on REM REM ------------------------------------------------------------------------ REM REM ----------------------------------------------------------------- REM set space 2 REM REPORTING TABLESPACE INFORMATION: REM REM This looks at Tablespace Sizing - Total bytes and free bytes REM column tablespace_name format a30 heading 'TS Name' column sbytes format 9,999,999,999 heading 'Total MBytes' column fbytes format 9,999,999

记一次异机rman还原后的操作

由 拜拜、爱过 提交于 2019-12-16 00:53:34
记一次异机rman还原后的操作 当时从主库通过rman备份到目前测试库还原之后，由于备份是在备库备份的，所以数据库还原后状态为readonly，standby_file_management参数为auto。 首先需要通过alter database clear logfile group 日志组;让数据库在磁盘创建日志文件。 出现问题1、重做日志物理文件不存在，当时日志组4状态为current，无法在readonly模式下进行更改操作。问题2、参数文件的undo表空间与控制文件的不对应 SQL> alter database rename file '/redo1/redo/redo04a.log' to '/u3/redo1/redo/redo04a.log'; alter database rename file '/redo1/redo/redo04a.log' to '/u3/redo1/redo/redo04a.log' * ERROR at line 1: ORA-01511: error in renaming log/data files ORA-01621: cannot rename member of current log if database is open ORA-00312: online log 4 thread 1: '/redo1/redo

NX二次开发 撤销无效

由 二次信任 提交于 2019-12-13 08:35:57
环境 ：Win7 x64,VS2015,NX12 问题 ： 代码执行完25,26 行代码，Ctrl+tZ撤销发现 25行创建的圆柱体仍然存在，26行创建的圆柱体删除 如果代码25行，26行调换位置，Ctrl+tZ撤销，25，26行创建的圆柱体都删除 原因 ： 不清楚，貌似和UI相关 解决办法 ：只能强制添加撤销代码 UF_UNDO_mark_id_t undoId; UF_UNDO_set_mark(UF_UNDO_invisible, NULL, &undoId); //your operate code UF_UNDO_undo_to_mark(undoId, NULL); UF_UNDO_delete_mark(undoId, NULL); 来源： CSDN 作者： 清风徐来 链接： https://blog.csdn.net/qq_30722721/article/details/103460743
订阅 undo