Oraclelockmode

Thisfunctionrequestsalockwithagivenmode.REQUESTisanoverloadedfunctionthatacceptseitherauser-definedlockidentifier,orthelockhandle ...,Thislockmodeisusedwhenasessionneedsexclusiveaccesstopartofacompoundresourceandsharedaccesstotheentirecompoundresourceatthesametime.,2010年6月21日—LockModes·1Nulllock(NL)UsedduringsomeparallelDMLoperations(e.g.update,delete)by·2Sub-share(SS)Until9.2.·3Sub-exclusi...

參考資訊如下
DBMS_LOCK , 3 of 6

This function requests a lock with a given mode. REQUEST is an overloaded function that accepts either a user-defined lock identifier, or the lock handle ...

Lock Modes - Oracle Internals

This lock mode is used when a session needs exclusive access to part of a compound resource and shared access to the entire compound resource at the same time.

Lock Modes

2010年6月21日 — Lock Modes · 1 Null lock (NL) Used during some parallel DML operations (e.g. update, delete) by · 2 Sub-share (SS) Until 9.2. · 3 Sub-exclusive( ...

LOCK TABLE

You can lock tables and views on a remote database only if you are using Oracle distributed functionality. All tables locked by a LOCK TABLE statement must be ...

ORACLE基础之oracle锁(oracle lock mode)详解转载

2018年2月9日 — 第一是每种数据库操作都对应的是什么样的锁(参考中间那一列),第二是每种锁之间,如果遇到之后是否会产生冲突,所谓冲突就是是否会使当前的数据库操作夯住.

ORACLE基礎之oracle鎖（oracle lock mode）詳解

3級鎖有： Insert, Update, Delete, Lock Row Exclusive 沒有 commit 之前插入同樣的一條記錄會沒有反應, 因為後一個3的鎖會一直等待上一個3的鎖, 我們必須釋放掉上一個 ...

ORACLE锁的几种模式

2020年12月8日 — 数字越大锁级别越高, 影响的操作越多。 1级锁有：Select，有时会在v$locked_object出现。 2级锁有：Select for update,Lock For Update ...

V$LOCKED_OBJECT

V$LOCKED_OBJECT lists all locks acquired by every transaction on the system. It shows which sessions are holding DML locks (that is, TM-type enqueues) on ...

What are different types of locks in oracle

2013年4月10日 — Before I begin let me first say that there are 5 types of table locks - row shared, row exclusive, shared, shared row exclusive and exclusive.