Because of performance problems using EJB2 queries, we decided a long time ago to use direct JDBC calls for query operations and EJB2 CMP for create, retrieve, update, and delete (CRUD) operations.

由于使用e JB 2查询存在性能问题，我们很早就决定对于查询操作使用直接JDBC调用，而对于创建、检索、更新和删除(CRUD)操作则使用EJB2 CMP。

youdao

That means you have to effectively delete the original scene and re-direct/script it into a better-serving scene.

这意味着你必须努力的删除原始的场景并且重新的将它描述成为更好适用于你的场景。

youdao

Unfortunately, you can't delete already existing engines, you can only edit and delete additional search engines that you add. Direct download.

不幸的是，您不能删除现有的引擎，您只能编辑和删除其他搜索引擎。

youdao