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  1. #1
    Join Date
    Aug 2003
    Posts
    33

    Unanswered: db2set hash_join

    What is the significance of setting HASH_JOIN using
    db2set hash_join=on.
    When do we really require it.

    Thanks,
    mc

  2. #2
    Join Date
    May 2003
    Location
    USA
    Posts
    5,737
    This allows DB2 to choose a hash join method if it thinks it is the best access path. Hash Joins are explained in the "Administration Guide: Performance."

    The default for version 7 is NO and the default for version 8 is YES. I would use the default depending on your DB2 version number, unless you determine that it is causing a performance problem.

  3. #3
    Join Date
    Aug 2001
    Location
    UK
    Posts
    4,650

    Re: db2set hash_join

    See if this article makes sense

    http://www7b.software.ibm.com/dmdd/l...208zubiri.html

    Cheers
    Sathyaram
    Visit the new-look IDUG Website , register to gain access to the excellent content.

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