Below are some simple examples of OQL queries.
以下是OQL查询的一些简单示例。
Screen shot showing the output from the OQL query.
截图显示的是OQL查询的输出。
Further details on the Castor OQL implementation are beyond the scope of this article.
对CastorOQL实现的更详细讨论超出了本文的范围。
For example, running an OQL query for all Strings with more than 100 characters would look like this.
例如,对所有含有超过100个字符的String运行OQL查询看起来如下。
On the surface, OQL seems remarkably similar to SQL, and thus supposedly just as powerful and easy to use.
表面上看,OQL非常类似于SQL,因此它应该和SQL一样强大并且易于使用。
Thirdly, this thesis studies the Object Query Language (OQL).
三是对对象查询语言oql进行的研究。
It supplies OQL with update statement, and analyses its process flow. The improved BNF for OQL is given.
为OQL语言补充了更新操作,分析了其工作过程,并给出了改进的OQL的BNF范式。
Internally, Castor's OQL implementation translates the OQL query into the appropriate SQL for the database.
Castor的OQL实现在内部将OQL查询转换成用于数据库的适当的SQL。
The syntax for OQL is similar to that of SQL but it lets you query the object model rather than directly querying the database.
OQL的语法类似于SQL的语法,但它却使您能够查询对象模型,而不是直接查询数据库。
OQL queries can also invoke methods on the objects themselves, use regular expressions as part of the query, and use built-in query tools.
OQL查询同样可以调用对象的方法,将正则表达式作为查询的一部分,并使用内置查询工具。
Rather than continue to use a fully qualified object name throughout a query, Castor's OQL implementation supports the use of aliases for objects.
Castor的OQL实现并不在整个查询中继续使用全限定对象名,相反它支持对象别名的使用。
Ramnarayan mentioned that these queries can be expressed in the Object Query Language (OQL) - a standard supported by prior GemFire releases as well.
Ramnarayan提到可以用对象查询语言(ObjectQuery Language,即OQL——GemFire之前的版本也支持此标准)来表示这些查询。
On this basis, it raises a query optimization model for OQL by introducing some query theories of RDB into the query process of OODB, and gives its implement strategy.
在此基础上,将RDB的一些查询理论应用于OODB的查询中,提出了一种OQL的查询优化模型,并给出其实现策略。
On this basis, it raises a query optimization model for OQL by introducing some query theories of RDB into the query process of OODB, and gives its implement strategy.
在此基础上,将RDB的一些查询理论应用于OODB的查询中,提出了一种OQL的查询优化模型,并给出其实现策略。
应用推荐