INFORMIX SERVER / 5725A3900 / C10 - IDS 12.10

When doing a simple select with an index scan, oncheck -pt will
still show the index not being used.
This is true both for a key only scan and an index read.

For a repro, just do an select zipcode  from customer or use an
optimizer hint to force an index scan on

set explain on;
select {+INDEX(customer zip_ix)}
fname, lname, zipcode from customer


sqexplai will show the index being used, but cases oncheck -pt
will not show any index access use..

Index zip_ix fragment partition rootdbs in DBspace rootdbs

    Physical Address               1:58240
    Creation date                  04/12/2019 12:20:34
    TBLspace Flags                 801        Page Locking
                                              TBLspace use 4 bit
bit-maps
    Maximum row size               134
    ...
    Number of rows                 0
    Partition partnum              1049234
    Partition lockid               1049211
    Last Lookup/Scan               No Record





the accesstime is updates via the IDX_ACCESS_NOW marcro, which
is only called in rsreadidx and btset_pos_at_item.
These functions are seemingly not used in the above scenario.

****************************************************************
* USERS AFFECTED:                                              *
* Users of IDS prior to 12.10.xC13.                            *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* oncheck -pt index usage info is not updated correctly.       *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************

not known / see Local fix

Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :

14.05.2019
24.09.2019
24.09.2019

12.10.xC13