The BTYPE column identifies the object type: 'T' for table, 'I' for index, and 'F' for function instance.
BTYPE 列显示对象类型:'T' 表示表,'I' 表示索引,'F' 表示函数实例。
Processing can recognize the design pattern and operate on its declared semantics; for instance, it can provide a special index for how-to collections
处理程序能够识别设计模式并对其声明性语义进行操作,比如,可以提供“how-to”集合的特殊索引。
For instance, the purchaseOrders table is partitioned by po_date and has a local index on po_customer, the query below will need a sort after the index scan.
例如,表purchaseorders通过po_date进行了分区,并具有本地索引po_customer,以下查询在完成索引扫描后还需要进行排序。
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