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Status Needs more information
Workspace Db2 for z/OS
Created by Guest
Created on Dec 4, 2015

Enhance use of Function Based Index when SQL function is used in right hand side in the predicate

Please refer to Service request number 23178,057,649
  • Admin
    Janet Figone
    Jul 27, 2022

    Dear Sarah, The Db2 for z/OS team for this component area has re-reviewed this enhancement request. Given the age and long history of this issue, we'd like to ask you to re-evaluate and please let us know your current needs. Thank you.

    Sincerely,

    The Db2 for z/OS Team

  • Guest
    May 24, 2021

    Customer complains the following in PMR 23178,057,649 that predicate "IOE-key LIKE const-EXPR" is not indexable. This is a legacy restriction not limited to IOE-keys. I believe "COL like const-EXPR" is also not indexable.

    I don't see Db2 removing this restriction anytime soon.


    select * from CUSTOMER 
    WHERE ucase(FULL_NAME, 'En_US') like ?
    is using index...

    select * from CUSTOMER
    WHERE ucase(FULL_NAME, 'En_US') like UCASE(CAST(? AS VARCHAR
    (141)) )
    is NOT using index....