August 2012
Intermediate to advanced
452 pages
15h 41m
English
book
Optimizing DB2 Queries with IBM DB2 Analytics Accelerator for z/OS
by Paolo Bruni, Patric Becker, Willie Favero, Ravikumar Kalyanasundaram, Andrew Keenan, Steffen Knoll, Nin Lei, Cristian Molaro, P S Prem
Content preview from Optimizing DB2 Queries with IBM DB2 Analytics Accelerator for z/OS
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Chapter 5. Installation and configuration 115
QUERY_ACCELERATION
This determines the default value that is to be used for the CURRENT QUERY
ACCELERATION special register. The default value for QUERY_ACCELERATION is
NONE.
ENABLE This specifies that queries are accelerated only if DB2
determines that it is advantageous to do so. If there is an
accelerator failure while a query is running, or the accelerator
returns an error, DB2 returns a negative SQLCODE to the
application.
ENABLE_WITH_FAILBACK
This specifies that queries are accelerated only if DB2
determines that it is advantageous to do so. If the accelerator
returns an error during the PREP ...
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