Catch block, including the database metadata operations shown in Listing 3.
catch块中,包括清单3所示的数据库元数据操作。
In between, we initialize some connection information, including the database name, the host name, the user name, and the password.
在之间,我们初始化一些连接信息,包括数据库名称、主机名、用户名和密码。
However, optimization decisions are a complex function of various attributes, including the database environment and query characteristics, as well as the data itself.
然而,优化决策是各种属性的复杂函数,这些属性包括数据库环境、查询特征以及数据本身。
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