ITPub博客

首页 > IT基础架构 > 网络安全 > NOROWDEPENDENCIES | ROWDEPENDENCIES

NOROWDEPENDENCIES | ROWDEPENDENCIES

原创 网络安全 作者:tsinglee 时间:2008-01-22 16:09:52 0 删除 编辑

CREATE TABLE * NOROWDEPENDENCIES | ROWDEPENDENCIES
This clause lets you specify whether table will use row-level dependency tracking.
With this feature, each row in the table has a system change number (SCN) that
represents a time greater than or equal to the commit time of the last transaction that modified the row. You cannot change this setting after table is created.

ROWDEPENDENCIES Specify ROWDEPENDENCIES if you want to enable row-level
dependency tracking. This setting is useful primarily to allow for parallel propagation in replication environments. It increases the size of each row by 6 bytes.

NOROWDEPENDENCIES Specify NOROWDEPENDENCIES if you do not want table
to use the row-level dependency tracking feature. This is the default.

[@more@]

来自 “ ITPUB博客 ” ,链接:https://blog.itpub.net/10599713/viewspace-998190/ ,如需转载,请注明出处,否则将追究法律责任。

请登录后发表评论 登录
全部评论
  • 博文量
    740
  • 访问量
    2002849