IBM Support

IT26528: SELECT SUBSTR IN IWA (WAREHOUSE ACCELERATOR) CAUSES AF IN GETTYPEEXPR WRTEXPR DWA_OFFLOAD()

Subscribe to this APAR

By subscribing, you receive periodic emails alerting you to the status of the APAR, along with a link to the fix after it becomes available. You can track this item individually or track all items by product.

Notify me when this APAR changes.

Notify me when an APAR for this component changes.

 

APAR status

  • Closed as program error.

Error description

  • Query with SUBSTR and CONCAT expression can cause the AF:
    
    SELECT   col1,  col[2,3]   || '-' || col[4,5]
    
    
    
    AF:
    
    x0000000011424cc0 (oninit)afstack
    0x0000000011427e38 (oninit)afhandler
    0x00000000114284f8 (oninit)affail_interface
    0x0000000011429d44 (oninit)mt_ex_throw_sig
    0x00000000113e76d0 (oninit)afsig_handler
    0x00003fffb0300478 <>__kernel_sigtramp_rt64
    0x00000000000018d5 (*nosymtab*)0x18d5        # Invalid/incorrect
    0x0000000010659a48 (oninit)wrtexpr
    0x0000000010659aa4 (oninit)wrtexpr
    0x000000001065843c (oninit)wrtexpr
    0x000000001065f85c (oninit)wrtcollist
    0x0000000010656b28 (oninit)creatext
    0x00000000104ce0f4 (oninit)opbldremote
    0x0000000010665998 (oninit)bldremcmds
    0x000000001058e6ec (oninit)dwa_offload
    0x000000001058f060 (oninit)dwa_matchQuery
    0x00000000104e9df0 (oninit)sqoptim
    0x00000000107936dc (oninit)bldstructs
    0x00000000107a6a7c (oninit)sqcmd
    0x00000000107a7410 (oninit)sq_cmnd
    0x00000000107a7560 (oninit)sq_prepare
    0x0000000010886fd8 (oninit)sqmain
    0x0000000011550e78 (oninit)spawn_thread
    0x0000000011401088 (oninit)th_init_initgls
    0x000000001140d4c0 (oninit)startup
    
    Actual AF should be more like:
    
    x0000000011424cc0 (oninit)afstack
    0x0000000011427e38 (oninit)afhandler
    0x00000000114284f8 (oninit)affail_interface
    0x0000000011429d44 (oninit)mt_ex_throw_sig
    0x00000000113e76d0 (oninit)afsig_handler
    0x00003fffb0300478 <>__kernel_sigtramp_rt64
                                     (oninit)gettypeexpr
    0x00000000000018d5 (oninit)typeexpr
    0x0000000010659a48 (oninit)wrtexpr
    0x0000000010659aa4 (oninit)wrtexpr
    0x000000001065843c (oninit)wrtexpr
    0x000000001065f85c (oninit)wrtcollist
    0x0000000010656b28 (oninit)creatext
    0x00000000104ce0f4 (oninit)opbldremote
    0x0000000010665998 (oninit)bldremcmds
    0x000000001058e6ec (oninit)dwa_offload
    0x000000001058f060 (oninit)dwa_matchQuery
    0x00000000104e9df0 (oninit)sqoptim
    0x00000000107936dc (oninit)bldstructs
    0x00000000107a6a7c (oninit)sqcmd
    0x00000000107a7410 (oninit)sq_cmnd
    0x00000000107a7560 (oninit)sq_prepare
    0x0000000010886fd8 (oninit)sqmain
    0x0000000011550e78 (oninit)spawn_thread
    0x0000000011401088 (oninit)th_init_initgls
    0x000000001140d4c0 (oninit)startup
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:                                              *
    * Users of IDS prior to 12.10.xC13.                            *
    ****************************************************************
    * PROBLEM DESCRIPTION:                                         *
    * In DWA environment, Assert Failure in gettypeexpr wrtexpr    *
    * called by dwa_offload().                                     *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    

Problem conclusion

  • Fixed in IDS 12.10.xC13.
    

Temporary fix

Comments

APAR Information

  • APAR number

    IT26528

  • Reported component name

    INFORMIX SERVER

  • Reported component ID

    5725A3900

  • Reported release

    C10

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2018-10-06

  • Closed date

    2019-09-26

  • Last modified date

    2019-09-26

  • APAR is sysrouted FROM one or more of the following:

  • APAR is sysrouted TO one or more of the following:

Fix information

  • Fixed component name

    INFORMIX SERVER

  • Fixed component ID

    5725A3900

Applicable component levels

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSGU8G","label":"Informix Servers"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"C10","Edition":"","Line of Business":{"code":"","label":""}}]

Document Information

Modified date:
26 September 2019