DB 2 udb系统编目是描述数据库对象的表的集合。
The DB2 UDB system catalog is a collection of tables that describe database objects.
这要求描述数据库模式并先提供一些数据库信息。
This requires that you describe your database scheme and provide some database information first.
一个参数是描述数据库的关联数组集合：表名、列名、主键和外键。
One parameter is a collection of associative arrays that describe the database: table names, column names, primary keys, and foreign keys.
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