Oracle10g在v$database视图中引入了current_scn,这个SCN来自底层表,代表当前的SCN,current_scn的查询会直接导致SCN的增进,而其他方式并不会。也就是说在这里的current_scn就像是一个Sequence一样,查询会导致增进。这也很好理解,v$database只能通过增进当前的SCN才能保证获得的SCN是Current的。--ORACLE内部的一些动作也...
SQL> select current_scn from v$database; CURRENT_SCN --- 8910961765230 我们看到current_scn的查询会直接导致SCN的增进,而其他方式并不会。也就是说在这里的current_scn就像是一个Sequence一样,查询会导致增进。这也很好理解,v$database只能通过增进当前的SCN才能保证获得的SCN是Current的。可是如果不查询呢?这个...
以下的文章主要向你解答Oracle10g中的current_scn是如何正确的计算运行,我们大家都知道Oracle10g在v$database 视图里引入了current_scn,其实这个SCN是来自底层表,代表当前的SCN。 在Oracle9i中我们可以通过dbms_flashback.get_system_change_number来获得系统的SCN。 但是注意current_scn还是有所不同的,我们看一下一个查...
SQL> select current_scn from v$database; CURRENT_SCN --- 8910961765230 我们看到current_scn的查询会直接导致SCN的增进,而其他方式并不会。也就是说在这里的current_scn就像是一个Sequence一样,查询会导致增进。这也很好理解,v$database只能通过增进当前的SCN才能保证获得的SCN是Current的。可是如果不查询呢?这个...
Oracle Database - Enterprise Edition - Version 10.2.0.1 to 10.2.0.5 [Release 10.2]: CURRENT_SCN from v$database not showing the correct value in physical standby DB
current SCN. See below for this Type II:1 Argument (before 7.2.3 only): Oracle is in the process of writing a block to a log file. If the calculated block checksum is less than or equal to 1 (0 and 1 are reserved) ORA-600 [2662] is returned. ...
2 APP_ _ROOT is an application root in CDB1. 3 APP PDB1 is an application PDB in APP_ ROOT. 4 FLASHBACK DATABASE is ON. You execute these commands: $ sqlplus sys/oracle_ 4U@localhost:1521/cdb1 SQL> SELECT current_ scn FROM v$database ; CURRENT SCN ...
SCNLayer SCNLayer 建構函式 屬性 AudioEngine AudioEnvironmentNode AudioListener AutoenablesDefaultLighting ClassHandle ColorPixelFormat CommandQueue Context CurrentRenderCommandEncoder CurrentTime DebugOptions DepthPixelFormat 裝置 JitteringEnabled 迴圈 OverlayScene ...
SCNActionable_Extensions SCNActionNodeWithElapsedTimeHandler SCNActionTimingMode SCNAnimatable SCNAnimatable_Extensions SCNAnimatableExtensions SCNAnimation SCNAnimationDidStartHandler SCNAnimationDidStopHandler SCNAnimationEvent SCNAnimationEventHandler SCNAnimationImportPolicy SCNAnimationPlayer SCNAntialiasingMode SCNAudio...
Hello everyone, I have the same question as the question posted inthis thread. I've been searching and searching to find a way to change the current time of an SCNParticleSystem so that I can render it offscreen into a video that I'm making. Since the video frames are rendered asynchro...