"cell smart table scan" についてメモ

Expert Oracle Exadata (Expert's Voice in Oracle)

Expert Oracle Exadata (Expert's Voice in Oracle)

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.