如图8的IXSCAN描述符所示，通过优化器利用的索引的领先列是PRODUCT _ NUMBER，其不为合并扫描联接提供所需的顺序。
As shown in the IXSCAN descriptor in Figure 8, the leading column of the index exploited by optimizer is PRODUCT_NUMBER, which does not provide the order required for merge scan join.
使用这一简单更改配置文件的方法(在Spring情形中，更改xml描述符)，您可以更改组件的实现方式以使用不同的索引策略。
Using this approach of simply altering a configuration file (in the Spring case, an XML descriptor), you can change the component's implementation to use a different indexing strategy.
在第二种情况下，文档转换器和索引引擎组件及其子组件通过描述符在外部进行定义，然后使用Spring进行实例化。
In the second scenario, the document translator and indexing engine components and their subcomponents are externally defined through a descriptor and are instantiated using Spring.
可以使用 Entity 类中的 @index注释或ObjectGrid描述符XML文件中的 HashIndex插件配置指定每个索引。
Each index can be specified using the @index annotation in an Entity class or by using the HashIndex plug-in configuration in an ObjectGrid descriptor XML file.
您的代码获取它需要的图像描述符，然后将其添加到图像注册表，并使用键为每个图像描述符建立索引。
The idea is that your code obtains the image descriptors it needs and adds them to the image registry, indexing each one with a key.
我设置了PDOMManager来为项目索引创建仅有的PDOMFullIndexer，所以这里不再涉及首选项和描述符。
I've set the PDOMManager to create only PDOMFullIndexers for project indexing, so there are no preferences or descriptors involved.
搜索具有指定属性描述符的项索引。
Searches for the index of the item that has the given property descriptor.
搜索具有指定属性描述符的项索引。
Searches for the index of the item that has the given property descriptor.
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