我们只保留了一个组合主键和一个辅助索引来完成所有的查询。
We keep only a compound primary key and a secondary index for each row, and answer all queries from a single index.
类型列指定路径表达式，则PATH辅助索引可以提高搜索的速度。
Type columns, a PATH secondary index may be able to speed up the search.
如果添加PATH辅助索引，则您还可以改善此类查询的搜索性能。
If you add a PATH secondary index, you may also improve the search performance in such queries.
在PATH辅助索引中，路径值和节点值是用于提高路径搜索效率的键列。
In the path secondary index, the path and node values are key columns that allow efficient seeks when searching for paths.
将辅助索引拆分成数块，以实现并行性(请参阅下面题为PIECESIZE的讨论)。
Break up the secondary indexes into pieces in order to achieve parallelism (see discussion below entitled PIECESIZE).
如果在辅助索引中表示一个标记列，则该列每次不同的出现均会通过索引来引用。
If a tagged column is represented in a secondary index, each distinct occurrence of the column is referenced by the index.
若要了解如何使用辅助索引，请考虑当用户更改邮件在邮件文件夹中的显示方式时所发生的操作。
To understand how a secondary index is used, consider what occurs when a user changes the way messages are presented in a messaging folder.
DB 2索引顾问(index adviser)辅助设计表上的索引。
DB2 index adviser provides assistance in the designing of indexes on tables. It is useful in the following situations.
将索引复制到HDR辅助服务器。
起初，搜索引擎只是一些著名门户网站的辅助工具。
In the beginning, the search engine is only an accessorial tool in some famous portal sites.
这些新语义对于页面的非视觉用户(包括使用屏幕阅读器这样的辅助技术的用户)和搜索引擎爬虫这样的计算机程序很重要。
These new semantics are important for non-visual users of the page (including anyone using assistive technologies like screen readers) but also for computer programs like search engine crawlers.
尽管可能有许多用于提供不同数据视图的辅助性索引B树，但每个表均由一个包含数据的B树组成。
Each table consists of one B-tree that contains the data, although there can be many secondary index B-trees used to provide different views of the data.
可以将索引复制到包含冲突索引的HDR对（HDR pair）中的辅助服务器。
You can replicate an index to a secondary server in an HDR pair that contains a corrupted index.
可以将索引复制到包含冲突索引的HDR对（HDR pair）中的辅助服务器。
You can replicate an index to a secondary server in an HDR pair that contains a corrupted index.
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