Expert Oracle Exadata (Expert's Voice in Oracle)
- 作者: Kerry Osborne,Randy Johnson,Tanel Poder
- 出版社/メーカー: Apress
- 発売日: 2011/08/09
- メディア: ペーパーバック
- クリック: 5回
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P.323
The main difference lies in the fact that each request to a storage cell contains a reference to the metadata of the statement, which in the case of Exadata includes the predicates and the list of columns to be returned. Since the storage cells have access to this information, they can apply the filters and do the column projection before returning the data to the requesting process.
