March 2004
Intermediate to advanced
356 pages
8h 11m
English
book
WebSphere Portal Server and DB2 Information Integrator: A Synergistic Solution
by Nagraj Alur, Isaac Allotey-Pappoe, Chris Delgado, Jayanthi Krishnamurthy, Walter Alvey
Content preview from WebSphere Portal Server and DB2 Information Integrator: A Synergistic Solution
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64 DB2 II and WPS Synergy
Figure 3-8 MQTs
If the four-way join query is executed frequently and the query can tolerate
remote data (accessed through nicknames) being slightly out-of-date, then an
MQT created on nicknames provides a local copy of the remote data as shown in
Figure 3-9, and provides significant performance benefits. As mentioned earlier,
an MQT based on nicknames is not automatically updated, and must be
manually refreshed.
Remote data
source
Local
data
nickname
Local
data
join
DB2 Federated Server
nickname
Chapter 3. DB2 Information In ...
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