从索引检索结果并且不进行过滤也有其缺点。
Retrieving the results from the index without filtering has its drawbacks.
如果您通过表的行索引或列索引检索值，将无法设置返回值。
If you retrieve the value by means of the table's row index or column index, you will not be able to set the return value.
在大多数情况下，索引检索数据的速度优势大大超过其不足之处。
In most situations, the speed advantages of indexes for data retrieval greatly outweigh these disadvantages.
寻找一个数据库选项或搜索函数选项，以允许您的查询直接从索引检索结果并避免任何种类的结果有效性过滤。
Look for a database option or search-function option that allows your search to retrieve its results directly from the indexes and that avoids any kind of validation-filtering of the results.
因此，index('links')会获得触发的链接的索引，可以通过这个索引检索相关联的id值。
Thus, index('links') will retrieve the index of the triggered link, and from this you can retrieve the associated id value.
我试着用搜索引擎检索，但找不到任何相关信息。
接下来，检索一个对应于关键词的索引对象。
Next, retrieve an index object that corresponds to the keyword.
从下往上读，您会注意到，DB 2使用了这两个索引来快速地检索我们的样例应用程序所请求的数据。
Reading from the bottom up, you'll note that DB2 used both indexes to quickly retrieve the data requested by our sample application.
在底部，多个查询将从索引中检索数据。
At the bottom, several queries retrieve data from the index.
因此索引加快了检索过程的速度，但减慢了修改的速度。
So, indexes speed the process of retrieval but slow down modification.
从另一个存储库检索索引更新，并将其合并到当前分支的文件或目录。
Retrieves index updates from another repository and merges them into the files and directories in the current branch.
以上示例展示了如何使用连续扫描和索引来进行数据检索，以及如何使用嵌套循环连接方法来连接所有表。
The above example shows that sequential scan and indexes are used to do the data retrieval, and the nested-loop join method is used to join all tables.
在使用IBM目录服务器作为LDAP目录为IBMNAS存储数据时，IBM NAS将自动对数据执行索引，确保可以更快地检索需要的数据记录。
When using an IBM directory server as the LDAP directory to store data for IBM NAS, IBM NAS automatically indexes the data, ensuring faster retrieval of required data records.
有两种新的数据类型可以存储二进制编码的字符串，这种字符串可以被索引从而实现快速检索。
Two new data types allow you to store binary-encoded strings, which can be indexed for quick retrieval.
它包括所使用的索引、从数据库表检索字段的时间和执行查询的步骤次序。
It includes the indexes that are used, The Times at which fields are retrieved from the database tables, and the order of the steps that execute the query.
给定一个匹配的索引，通过一个单独的取索引操作就可以得到要检索的行。
Given a matching index, a single index fetch will pin down the row to be retrieved.
新闻报道，博客文章以及电子邮件都缺乏系统查阅清单，无法为引文索引所检索。
News articles, blog posts and e-mails often lack a systematic reference list that could be used to make a citation index.
同样，当请求者检索引用资源库条目的WS - Inspection文档时，可以发现UDDI资源库本身。
Likewise, a UDDI repository may itself be discovered when a requester retrieves a WS-Inspection document which references an entry in the repository.
今天让我们一起来看看流行的全文检索引擎——ApacheLucene与Lucene.Net。
Today we look at the popular Full Text search engines, Apache Lucene and Lucene.Net.
文本检索与索引技术。
Sparse索引在所检索的字段并非经常出现在集合中时能提升性能。
Sparse indexes boost performance when searching by a field that is often missing within a collection.
Lucene主要提供了两个服务：文本索引，文本检索。
Lucene offers two main services: text indexing and text searching.
很好，但是您对这种结构所能做的只是通过单独的(或者多维的)索引来设置和检索元素。
Good enough, but about all you can do with this structure is set and retrieve elements by individual (multi-dimensional) index. In contrast, a Numarray array is a bit more flexible.
JDBC适配器使用 object_key作为对客户表的索引，以检索更改的行。
The JDBC adapter uses the object_key as an index into the Customer table to retrieve the changed row.
索引——创建网页检索数据索引。
不过，可以想象得到同时从每个引擎检索结果为用户体验所带来的改进，而不是每次只从一个搜索引擎检索结果。
However, you can imagine the improvement in user experience it makes to retrieve the results from each engine simultaneously, instead of doing it one search engine at a time.
这个文本搜索包和它的相关函数被称为文本搜索引擎，它是专门设计用来执行文本数据的快速检索和自动索引。
This text search package and its associated functions, referred to as the text search engine, is specifically designed to perform fast retrieval and automatic indexing of text data.
视频和元数据还能存储和自动编入索引，以供以后搜索和检索。
Video and metadata are also stored and indexed automatically for subsequent search and retrieval.
它让您够能将查询发送到门户搜索引擎管理的集合，检索结果并显示这些结果。
It enables you to send queries to the collections managed by the Portal Search Engine, retrieve results, and display those results.
对抓取的影响：搜索引擎爬虫很少检索一个URL的会话id，因为有一个重要的可能，这个内容可能是另外一个URL的副本。
Crawlability impact: Spiders are less likely to crawl a URL with a session id because there's a strong likelihood the content is a copy of another URL.
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