公开(公告)号：GB2366039B

公开(公告)日：2004-05-12

申请号：GB0103345

申请日：2001-02-12

Applicant: IBM

Inventor： SHARPE DAVID C ,  HUFFMANN PAUL C ,  ZILIO DANIEL C ,  MCKNIGHT KATHY A

IPC: G06F12/00 ,  G06F17/30

公开(公告)号：GB2366039A

公开(公告)日：2002-02-27

申请号：GB0103345

申请日：2001-02-12

Applicant: IBM

Inventor： SHARPE DAVID C ,  HUFFMANN PAUL C ,  ZILIO DANIEL C ,  MCKNIGHT KATHY A

IPC: G06F12/00 ,  G06F17/30

Abstract: A query processor (14) calls a data manager (16) to carry out data access for a query including a filtering operation. The data manager (16) accesses the data in a set of data (18) and, before returning the data, initiates a callback to the query processor (14) to determine if the located data meets the filtering criteria. Where the data does not satisfy the filtering criteria, the data manager (16) seeks additional data in the set of data (18), without having to return the first located data to the query processor (14).