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Informix - Problem description

Problem IT28718 Status: Closed

FAILURES POSSIBLE WHEN CALLING VARIOUS HASH JOIN FUNCTIONALITY FROM
COLLSUBQ_OPEN

product:
INFORMIX SERVER / 5725A3900 / C10 - IDS 12.10
Problem description:
The problem was originally reported running a 12.10.FC7W1 server
on linux x86_64.  The repro
I developed shows the problem also reproduces in the latest
12.10 server (FC12W1).

The following are examples of stacks reported for this issue:

    
    mt_aio_reset
    fstmp_io
    hash_writeout_buffer
    hash_write_buffer_to_temp
    ha_write_out_full_page
    ha_insrt_hashtab_or_ovrfl_page
    hjoin_open
    sort_open
    prepselect
    collsubq_open
    ifx_coll_open_with_options
    mi_collection_open_with_options
    collectionoutput_internal
    udrlm_clang_execute_internal
    udrlm_clang_execute
    udrlm_exec_routine
    udr_execute
    exroutine
    geval
    geval
    fnreplace
    geval
    fnreplace
    geval
    fnreplace
    geval
    fnreplace
    geval
    fnreplace
    geval
    ev_geval
    new_eval
    sort_open
    prepselect
    excommand
    sq_exselect
    sqmain
    spawn_thread
    th_init_initgls
    startup

Other stacks vary in the topmost functions with startup through
collsubq_open() being consistent
but variations above comparable to these below:

    afstack
    afhandler afcrash_interface
    mt_clear_mutex
    mt_aio_free
    fstmp_drop
    drop_hash_temp_partn
    hjcleanup
    hjoin_close
    sort_open
    prepselect
    collsubq_open

    afstack
    afhandler
    affail_interface
    mt_ex_throw_sig
    afsig_handler
    
    mt_aio_reset
    fstmp_io
    hash_writeout_buffer
    hash_write_buffer_to_temp
    ha_write_out_rem_part_pages
    setup_new_environment
    hjoin_next
    sort_open
    prepselect
    collsubq_open

    afstack
    afhandler
    affail_interface
    mt_ex_throw_sig
    afsig_handler
    
    hash_read_buffer
    hash_read_tuple
    hash_read_tuple_from_temp
    hjoin_next
    sort_open
    prepselect
    collsubq_open
Problem Summary:
****************************************************************
* USERS AFFECTED:                                              *
* Users of IDS prior to 12.10.xC13.                            *
****************************************************************
* PROBLEM DESCRIPTION:                                         *
* Failures possible when calling various hash join             *
* functionality from collsubq_open.                            *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
Local Fix:
Solution
Workaround
not known / see Local fix
Timestamps
Date  - problem reported    :
Date  - problem closed      :
Date  - last modified       :
08.04.2019
24.09.2019
24.09.2019
Problem solved at the following versions (IBM BugInfos)
12.10.xC13
Problem solved according to the fixlist(s) of the following version(s)
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